YOW - LON

C$ 365 Find Cheap Flights from Ottawa to London

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ottawa to London departing on 1/12. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to London

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ottawa to London.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ottawa to London.
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Flight Deals

Cheap Flights from Ottawa to London (YOW-LON)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ottawa to London that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ottawa to London

Tue, 30 Sep - Wed, 8 Oct
 Logo
5:55 a.m. - 3:00 p.m.YOW-STN
28h 05m2 stops
 Logo
8:15 a.m. - 12:22 a.m.STN-YOW
21h 07m2 stops
C$ 788
Find Deal
Thu, 2 Oct - Wed, 8 Oct
Air Canada Logo
6:40 p.m. - 6:30 a.m.YOW-LHR
30h 50m1 stop
Air Canada Logo
9:30 a.m. - 1:53 p.m.LHR-YOW
9h 23m1 stop
C$ 803Air Canada
Find Deal
Wed, 1 Oct - Wed, 8 Oct
Air Canada Logo
11:05 a.m. - 6:30 a.m.YOW-LHR
14h 25m1 stop
Air Canada Logo
5:40 p.m. - 11:04 p.m.LHR-YOW
10h 24m1 stop
C$ 804Air Canada
Find Deal
Thu, 2 Oct - Wed, 8 Oct
Lufthansa Logo
6:55 p.m. - 6:30 a.m.YOW-LHR
6h 35mdirect
Lufthansa Logo
12:40 p.m. - 3:00 p.m.LHR-YOW
7h 20mdirect
C$ 869Lufthansa
Find Deal
Sat, 11 Oct - Mon, 20 Oct
United Airlines Logo
2:45 p.m. - 10:10 a.m.YOW-LHR
14h 25m2 stops
United Airlines Logo
6:50 a.m. - 4:43 p.m.LHR-YOW
14h 53m2 stops
C$ 897United Airlines
Find Deal
Wed, 19 Nov - Mon, 24 Nov
United Airlines Logo
3:10 p.m. - 6:20 a.m.YOW-LHR
10h 10m1 stop
United Airlines Logo
6:50 a.m. - 11:54 p.m.LHR-YOW
22h 04m2 stops
C$ 898United Airlines
Find Deal
Mon, 29 Sep - Mon, 6 Oct
Porter Airlines Logo
7:00 a.m. - 10:45 a.m.YOW-LGW
22h 45m1 stop
Porter Airlines Logo
12:40 p.m. - 8:05 a.m.LGW-YOW
24h 25m1 stop
C$ 940Porter Airlines
Find Deal
Wed, 5 Nov - Mon, 10 Nov
Porter Airlines Logo
6:55 p.m. - 9:45 a.m.YOW-LGW
9h 50m1 stop
Porter Airlines Logo
11:40 a.m. - 6:26 p.m.LGW-YOW
11h 46m1 stop
C$ 955Porter Airlines
Find Deal
Mon, 22 Sep - Thu, 16 Oct
Air Transat Logo
5:05 p.m. - 10:45 a.m.YOW-LGW
12h 40m1 stop
Air Transat Logo
12:40 p.m. - 12:21 a.m.LGW-YOW
16h 41m1 stop
C$ 964Air Transat
Find Deal
Tue, 30 Sep - Wed, 29 Oct
Air Transat Logo
5:05 p.m. - 10:45 a.m.YOW-LGW
12h 40m1 stop
Air Transat Logo
11:40 a.m. - 12:41 a.m.LGW-YOW
17h 01m1 stop
C$ 970Air Transat
Find Deal
Expert advice

Expert advice for your flight from Ottawa to London

 
Snippets provided in this section are AI-generated based on a summarisation of KAYAK-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airlines
Air Canada

Air Canada's Signature Class offers lie-flat seats with direct aisle access for long-haul comfort.


Air Canada provides complimentary hot meals for economy passengers on international flights departing North America.

Read more about Air Canadaby Stefanie Waldek
Lufthansa

Lufthansa's Premium Economy offers 50% more space and an extra checked bag for long-haul flights.


Lufthansa provides 11 special meal choices for dietary needs, order 24 hours before departure.

Read more about Lufthansaby Jessica Macdonald
Airports
YOW

Ottawa airport's security lines move quickly due to low flight volume. Check estimated wait times online before heading to the airport.

Read more about YOWby Mark Stachiew
LHR

For a quick trip to central London, the Heathrow Express takes 15 minutes to Paddington Station. Book online early for cheaper fares.

Read more about LHRby Duncan Madden
Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on Air Canada

Stefanie Waldek

Stefanie Waldek

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Read more
Jessica Macdonald

Jessica Macdonald

Expert on Lufthansa

Jessica Macdonald

Jessica Macdonald

Currently based in Scotland after living in South Africa and the United States, Jessica has been writing travel and aviation content for more than 10 years. She regularly contributes to Travel + Leisure and TripSavvy, and has had work published by Condé Nast Traveller and The Independent. She has traveled to more than 50 countries across six continents.

Read more
Mark Stachiew

Mark Stachiew

Expert on YOW

Mark Stachiew

Mark Stachiew

Mark Stachiew has been exploring the world and writing about it for more than 30 years. His travel stories have appeared in numerous newspapers, magazines and online publications in Canada, the United States and beyond.

Read more
Duncan Madden

Duncan Madden

Expert on LHR

Duncan Madden

Duncan Madden

Duncan is a freelance travel writer, copywriter and book author in constant search of travel stories and the perpetual sensation of being on holiday. He’s never happier than when on a dusty trail in search of empty waves or ducking under the piste tape in search of snowbound solitude. British born, living in Germany, but happiest heading for the horizon. His first book, Found in Translation, explores the etymologies and stories of country names around the world and is out now.

Read more
Booking Insights

KAYAK's insights & trends for Ottawa to London flights

Get data-powered insights and trends into flights from Ottawa to London to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Ottawa to London?

What is the cheapest Ottawa to London flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest return flight from Ottawa to London costs C$ 982 on the route between Ottawa (YOW) and London Heathrow Airport (LHR). It is also the most popular route.

What’s the cheapest day of the week to fly from Ottawa to London?

The average price of all round-trip flights from Ottawa to London clicked on KAYAK for each day over the last 12 months.

If your flying dates are flexible, you should consider flying to London on a Friday, as we generally find the cheapest rates on that day for this route. On the other hand, Sunday is the most expensive day to fly from Ottawa to London. For your return ticket, we recommend flying on a Wednesday and avoiding Saturdays for the best deals.

What is the cheapest month to fly from Ottawa to London?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ottawa to London, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Ottawa to London is February, where tickets cost C$ 908 (return) on average. On the other hand, the most expensive months are December and July, where the average cost of round-trip tickets is C$ 1,248 and C$ 1,096 respectively.

Can I save money by flying with a layover from Ottawa to London?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at C$ 1,993 on average.

How far in advance should I book a flight from Ottawa to London?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Ottawa to London, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Ottawa to London, you should book around 7 weeks before departure, which saves you about 17% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 12 weeks before departure.

Good to know

Low seasonNovember
Cheapest flightC$ 365
Best time to beat the crowds (0% less expensive on average)
Most popular time to fly (5% more expensive on average)
Flight from Ottawa to London Heathrow Airport

When to book flights from Ottawa to London

Are your dates flexible? Find out the best times to travel from Ottawa to London based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Ottawa to London

  • Are there facilities for travelling moms at Ottawa Macdonald-Cartier International Airport?

    Yes, there are breastfeeding rooms at YOW. The easily accessible breastfeeding room at Ottawa airport is located at Pre-security, Level 1, and is open 24 hours a day. This room is designed for mothers who need to breastfeed their infants or pump breast milk. It is equipped with a sink, a changing table, a comfortable chair, and a tv.

  • What passenger assistance services are there at Gatwick airport (GWT)?

    Gatwick Airport is committed to providing the highest possible standards of customer care and assistance to all passengers. The hidden disability services include the use of assistive technology to help passengers with hidden disabilities navigate the airport, as well as special assistance during the check-in, security, and boarding processes. There is a sensory room at the North terminal available for passengers who may need a calm and quiet space to relax before their flight.

  • How can I move out of Heathrow airport faster?

    If you want a faster way to get out of London Heathrow Airport, a taxi is usually the best deal. Every terminal has its taxi drop-off and pick-up area, so you can hop out of the plane and be inside a cab in a matter of minutes. Drivers are well-versed in the areas you wish to visit and are fully licensed by the appropriate authorities.

  • Are there airlines offering flights with stops from Ottawa to London?

    Several airlines offer flights with stops from Ottawa to London. This is especially important if you want more control over your itinerary, as you can choose your own layovers. You can check out Air Canada or Air Canada Express. These airlines offer flights with one or more stops between Ottawa and one of the London airports.

  • What is the cheapest flight from Ottawa to London?

    In the last 3 days, the lowest price for a flight from Ottawa to London was C$ 264 for a one-way ticket and C$ 570 for a round-trip.

  • Which airports will I be using when flying from Ottawa to London?

    When flying out of Ottawa you will be using Ottawa. You will be landing at one of these airports: London Gatwick or London Heathrow.

  • Which airlines offer Wi-Fi service onboard planes from Ottawa to London?

    Air Canada, and Lufthansa offer inflight Wi-Fi service on the Ottawa to London flight route.

  • Which aircraft models fly most regularly from Ottawa to London?

    The Boeing 787-9 Dreamliner is the aircraft model that flies most regularly on the Ottawa to London flight route.

  • Which airline alliances offer flights from Ottawa to London?

    Star Alliance, and oneworld are the airline alliances operating flights between Ottawa and London, with Star Alliance being the most commonly used for this route.

  • On which days can I fly direct from Ottawa to London?

    You can catch a direct flight from Ottawa to London on on Monday, Wednesday, Thursday, and Saturday.

  • Which is the best airline for flights from Ottawa to London, Porter Airlines or KLM?

    The two airlines most popular with KAYAK users for flights from Ottawa to London are Porter Airlines and KLM. With an average price for the route of C$ 998 and an overall rating of 8.0, Porter Airlines is the most popular choice. KLM is also a great choice for the route, with an average price of C$ 942 and an overall rating of 7.8.

  • How does KAYAK find such low prices on flights from Ottawa to London?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ottawa to London.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ottawa to London?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London from Ottawa is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Ottawa to London?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to London with an airline and back to Ottawa with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ottawa to London?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to London from Ottawa up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Ottawa to London

  • Looking for a cheap flight? 25% of our users found flights on this route for C$ 1,012 or less one-way and C$ 1,097 or less round-trip.
  • The city of Ottawa is served by Gatineau-Ottawa Executive Airport (YND) and Ottawa Macdonald-Cartier International Airport (YOW). Ottawa Macdonald-Cartier Airport is the main airport serving the city, which is also well connected with an efficient public transport network. You can get to the airport from downtown Ottawa by OC Transpo bus, which is only 12 km away.
  • You can relax at Aspire Lounge or Air Canada Maple Leaf Lounge while waiting for your flight at YOW. The Aspire Lounge is located in the Domestic Terminal of the Ottawa International Airport (YOW). The lounge is located after the security near gate 20. Just outside gate 18, you'll find the entrance to the Aspire Salon Lounge on the right. To find the Maple leaf lounge, take the stairs before Gate 19 and go to level 1 to access the entrance.
  • You can leave your car in Ottawa International airport's long-term parking lot. It is located on the lot labeled parkade 4 (P4) on the surface lot. You can pay for parking at the long-term lot (P4) near the exit when you return from your trip.
  • If you arrive at London Heathrow Airport (LHR), you may enjoy a spa treatment at terminal 5B at gate 35. Be Relax spa offers a full range of treatments to help you unwind and feel revitalized. To help passengers unwind after lengthy trips, they employ several massage therapy and treatments.
  • If you're flying into London City Airport (LCY), you can request airport assistance from the airport staff. To easily get assistance from the staff at the Arrivals section, we recommend that you get a unique lanyard to wear. You can conveniently get a lanyard from the terminal's information desk.

Prefer to fly direct from Ottawa to London?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Ottawa to London.
Find which airlines fly direct from Ottawa Airport to London, which days they fly and book direct flights.

Direct departures

Ottawa to London

Monday

Air Canada

Air Canada

Wednesday

Air Canada

Air Canada

Thursday

Air Canada

Air Canada

Saturday

Air Canada

Air Canada

See more nonstop flights

Direct returns

London to Ottawa

Monday

Air Canada

Air Canada

Wednesday

Air Canada

Air Canada

Thursday

Air Canada

Air Canada

Saturday

Air Canada

Air Canada

See more nonstop flights

Reviews of the top 5 airlines flying from Ottawa to London

 
See real verified KAYAK customer reviews for airlines flying from Ottawa to London. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Ottawa to London? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
Porter AirlinesOverall score based on 332 reviews
8.0Comfort
7.0Entertainment
8.2Boarding
8.7Crew
7.6Food
Airline reviews

The flight was fine see earlier note for the problem

8.0 ExcellentAnonymous, Aug 2025YHZ - YUL
Read more Porter Airlines reviews

The flight was fine see earlier note for the problem

Three hours on the tarmac with almost zero communication from the cockpit. Not when offered a water in the interim. In my 67 years of flying all over the world the worst experience ever. The plane was half empty, however had to pay for seats to sit next to my girlfriend. Extra to take a carry on. I would never fly Porter again even for free.

All good the seats a little tight and no I pad screen

Everything was good except the fact you charge more for a carry on bag vs a check in bag and to top it off in US$ that was not impressive

Our flight was cancelled at the last minute for maintenance reasons and we were rebooked on a late flight when we purposefully booked our flight to be home early due to work.

Seemed like an old plane. Very noisy. The seat cushions were so old that the metal bracing of the seats were poking through. There was plenty of leg room though.

Flight was delayed over 2 hours, then landed at a different airport!

The whole experience from check in to deboarding was fantastic.

Just an evening before they canceled my ticket and offered me ticket costing 3 x times more than. I will not fall prey to these scams,Will never book through kayak now. Such a bad experience.

was okay except.. 1)the porter check in webpage doesn't let you print your boarding pass from home 2)that there was a 90 min cut off for checking in on the kiosk in general, and to print a boarding pass, even tho i checked in online already....

It’s ok just the boarding point is far too far

Check in slow even though completed online check in, there was no bag drop available so had to query for 90mins as only 2 staff on desks.

Flying to a far away destination is a miracle in itself, so please take these with a grain of salt. The seats are a bit tired, and need a freshen up. The entertainment could be a bit newer, especially with all services available now. The food really is where we need help. But again, flying is a privilege, so all is good.

Not so much porter it's your site! Not good

They are a sister company with Air Transat and the two companies do not work well together. If you have any issues the two companies will blame each other and you will miss your flights. The help line does not help

Never book through a third party. Book through Air transats website. Terrible process to get help and many issues happen with them and sister companies because half the flights you book with them aren’t even through air transat.

The plane was pretty full, and we dis not have any includes meal for our 4h30 flight? And on-board entertainment wasn't available, there was no TV or plugging to charger your device on the plane. They told us to download an app if we wanted to watch movies but it never connected, that was a disappointment, the r we st was very good though and the crew were really nice!

Seats were very tight especially for first leg of trip.

Not necessarily a Transat issue but it took 2 hours to go through immigration. Tried to reach out to Transat for resolution but was unable to reach an agent.

The flight was excellent, once it started, however we were delayed two hours when the first plane’s engines wouldn’t start. They found another identical plane and transferred us and our luggage in under two hours and made up almost an hour in the air.

I bought business class tickets but the seats are exactly like economy with no comfort seats nor an empty seat next to me provided. Very poor, low quality airline.

I don't understand the concept of paying to get your personal luggage onboard and then asked to check it in.... either sell the space or don't, its a hassle to carry those all through the airport just to make a check in at the last minute.

The food was great and the service and attitude was amazing!!

It was a great experience. The only thing I would have changed was that the bathrooms were never cleaned and they got very dirty.

Old airplanes small seats expensive tickets, not as expected overall and not comfortable according to the price

It was an OK flight with below mediocre service by their flight attendants

Wasted a lot of time trying to find the CDG lounge - it was not next to the connecting flight gate like the Air France staff said.

The only reason the overall rating wasn't "excellent" was due to problems in claiming luggage. The bags are delivered to the main area (Cinta 35) for domestic passengers, but to a DIFFERENT ROOM for international arrivees. After waiting 30 minutes, someone (who didn't appear to be from Air France or the airport) told us to go to another area. There we found our bags, which appeared to have been awaiting us for a while. We had to go through a bag check before leaving the airport. If we had been alerted to this possibility, or better yet, been to go directly to Cinta 34, we could have eliminated quite a bit of waiting.

Much better than the major US Carriers especially in Biz Class.

I wish that the meal included a vegetable or even a salad instead of couscous! Why serve chicken with rice AND couscous? Service was good overall though a bit lacking in friendliness. Usually on air france I've been offered a glass of champagne before dinner, wine with dinner, and a digestif after dinner. We were only offered wine this time!

Due to the strike by AC flight attendants, my flight was cancelled. Very disappointing! A refund is being processed. This was not a Kayak issue. I will be sure to come back to Kayak in the future.

In flight entertainment system did not work across the whole plane for entire flight. Seats were very cramped. Cabin temperature was freezing cold. Crew was miserable and answered everyone in a short and barking manner. I’ve flown air Canada many many times and never had an issue. But this was unpleasant.

They screwed up so bad, I asked for a short check for my luggage since we had a 21 hour overnight layover in London at a hotel. They said I have to receive my luggage in London because it’s an overnight layover. Get to London, nope, my bags aren’t coming off they are staying in terminal 5 over night and going straight to Ibiza. So we had no luggage for a whole day and basically stuck with no clothes or washroom stuff. Finally get to Ibiza and my luggage is completely smashed and damaged and missing a wheel. Now I have to drag this 50 lbs luggage around Ibiza islands for 10 days. Wtf. So pissed off Air Canada is LITERALLY THE WORST AIRLINE IN THE WORLD

Staff was very courteous and kept things organized. We will definitely use Air Canada for further travel

Great flights. 90 minute departure delay for maintenance issues, not a great start but, afer that very good. Didn't pay extra for seats and lucked into a window and an aisle seat. Price was excellent at the super low economy level.

Great flight ✈️ I requested a vegan meal and don’t think offering frozen fruit cup for breakfast is a good idea people want something warm or neutral like the muffin but it was cold from being in the paper bag with the frozen fruit 🧐 and unfortunately I didn’t have either and I don’t like wasting food so that was a disappointment. Flight was on time departure and arrival flight crew were good.

Just a little improvement on food but everything is excellent

They lost my checked in luggage, why do I pay for my cargo not arriving at the same destination as me?

Poor planning meant the plane was delayed an hour, then a thunder storm started and the ground staff couldn't work. Eventual arrival in Santiago was 3 hours late resulting in missed connections and the need to buy new tickets.

From my experience, I see there is room for a greater mixture of cultures, for example, a mix of the nationality of cabin crews, food, music, food, etc.

The plane (Mitsubishi CRJ) felt old, creaking and not very new. The crew was okay. Hot water provision was broken so hot beverages could't be served.

Not bad. We had preboarding tickets but the preboarding was badly managed. We lined up behind all the parents with little kids etc and when we got to the front of the line the attendant deliberately turned away from us and ignored us until I asked to be allowed to go to the gate. She started telling us that we had to wait until I told her we had preboarding then she let us through.

Everything well done and customer oriented There entertainment system is difficult to navigate

It was very good, good food good stuff, The toilets were a little stinky.

They delayed my flight from Toronto Pearson for one hour and Frankfurt to Abuja for 2HRS, So sad

The airport crew and flight crew did a great job rearranging the gate at the last minute and got us to Munich on time

The aircraft was old, there was no charging sockets, and the seats were narrow and uncomfortable even though I had exit row premium seats.

I've yet to be on an Air Dolomiti flight that hasn't been delayed, but other than that I've really enjoyed flying with them

When we went to the lounge they told us to go into the main lounge and not the full business class section, later they told me that Lufthansa wont pay the full fee to alloq the business class passengers entry to the nicer sectikn where all the other airlines nusiness class passengers go into. Very poor arrangement.

The service was really good. The breakfast food could’ve been better as I don’t eat sweets for breakfast and the only choice was a muffin. Overall, good experience though. Thank you.

Everything you need to know for your flight from Ottawa to London

Other airlines flying from Ottawa to London

Flights from the other most popular airlines that fly from Ottawa to London according to KAYAK users. Prices are the lowest found on KAYAK over the last 7 days. Price and availability are not guaranteed.

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