YSJ - LHR

C$ 848 Find Cheap Flights from Saint John to London Heathrow Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Saint John to Heathrow departing on 13/12. 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, 0 bags

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

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Saint John to London, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Saint John to London, as well as popular online travel agencies
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Flight Deals

Cheap Flights from Saint John to Heathrow (YSJ-LHR)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Saint John to Heathrow 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 Saint John to Heathrow

Fri, 20 Feb - Tue, 24 Feb
Air Canada Logo
4:15 p.m. - 7:10 a.m.YSJ-LHR
10h 55m1 stop
Air Canada Logo
6:50 a.m. - 3:35 p.m.LHR-YSJ
12h 45m2 stops
C$ 1,011Air Canada
Find Deal
Fri, 20 Feb - Tue, 24 Feb
Air Canada Logo
4:15 p.m. - 7:10 a.m.YSJ-LHR
10h 55m1 stop
Air Canada Logo
6:50 a.m. - 3:35 p.m.LHR-YSJ
12h 45m2 stops
C$ 1,012Air Canada
Find Deal
Fri, 20 Feb - Tue, 24 Feb
Air Canada Logo
4:15 p.m. - 7:10 a.m.YSJ-LHR
10h 55m1 stop
Air Canada Logo
6:50 a.m. - 3:35 p.m.LHR-YSJ
12h 45m2 stops
C$ 1,015Air Canada
Find Deal
Fri, 20 Feb - Tue, 24 Feb
Air Canada Logo
4:15 p.m. - 7:10 a.m.YSJ-LHR
10h 55m1 stop
Air Canada Logo
1:25 p.m. - 3:35 p.m.LHR-YSJ
30h 10m1 stop
C$ 1,029Air Canada
Find Deal
Fri, 20 Feb - Tue, 24 Feb
Air Canada Logo
4:15 p.m. - 7:10 a.m.YSJ-LHR
10h 55m1 stop
Air Canada Logo
11:10 a.m. - 11:29 p.m.LHR-YSJ
16h 19m1 stop
C$ 1,035Air Canada
Find Deal

Everything you should know

Cheapest round-trip
C$ 1,011
Typical prices: C$ 1,012-C$ 1,190
Air Canada
Fri 20/2Tue 24/2
YSJ - LHR • 1 stop
Cheapest one-way flights
C$ 848
Air Canada
Sat 13/12
YSJ - LHR • 3 stops
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KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to Heathrow!
Booking Insights

KAYAK's insights & trends for Saint John to Heathrow flights

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

Which airlines fly direct between Saint John and London Heathrow Airport?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for round-trip flights from Saint John to London Heathrow Airport.

There is just one airline that flies from Saint John to London Heathrow Airport direct and that is Air Canada. The best round-trip deal found from Air Canada for the route is C$ 1,166.

Good to know

Low seasonSeptember
Cheapest flightC$ 848
Best time to beat the crowds (15% less expensive on average)
Most popular time to fly (17% more expensive on average)
Flight from Saint John to London Heathrow Airport

When to book flights from Saint John to Heathrow

Are your dates flexible? Find out the best times to travel from Saint John to Heathrow 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 Saint John to London Heathrow Airport flights

  • What is the cheapest flight from Saint John to London Heathrow Airport?

    In the last 3 days, the lowest price for a flight from Saint John to London Heathrow Airport was C$ 848 for a one-way ticket and C$ 1,011 for a round-trip.

  • Which airports will I be using when flying from Saint John to London Heathrow Airport?

    When flying out of Saint John you will be using Saint John. You will be landing at London Heathrow Airport, also known as London Heathrow.

  • Which aircraft models fly most regularly from Saint John to London Heathrow Airport?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Saint John to London Heathrow Airport?

    Star Alliance is the only airline alliance operating flights between Saint John and London Heathrow Airport.

  • How does KAYAK find such low prices on flights from Saint John to London Heathrow Airport?

    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 Saint John to London Heathrow Airport.

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

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

  • What is the Hacker Fare option on flights from Saint John to London Heathrow Airport?

    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 Heathrow Airport with an airline and back to Saint John with another airline.

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

    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 Heathrow Airport from Saint John up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Saint John to Heathrow

 
See real verified KAYAK customer reviews for airlines flying from Saint John 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 Saint John to Heathrow? 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.
7.1
Air CanadaOverall score based on 10383 reviews
7.3Boarding
7.1Comfort
6.8Entertainment
7.8Crew
6.3Food
Airline reviews

Air Canada cancelled our flight and reschedule it 26 hours later that completely interrupted my family's long waited Japan trip, it wasn't due to natural reason such as weather but under the company's control. On the day we wasted 9 hours of our time from 6am to 3pm, including a few hours in the customer counter waiting for supervisor to handle our rescheduling. When we came to the counter for rebooking help there were at least 4 employees on the counter but we were told they were not trained to handle customer rebooking, we were also told the supervisor could come 10:30 to handle our rebooking, but she showed up more than one hour later, the end result was exactly the same so the few hours we spent waiting for her was completely wasted; We already prepaid hotel and all the tickets for the our stay in Tokyo so all of the cost for the first day is completed wasted; The $80 meal voucher issues was far less than our financial loss due to the financial cancellation, and it was not surprisingly invalid (as Your company screw up everything possible along the flight), the vouchers were supposed to last 72 hours, when we tried to used it at our lounge next day less than 24 hours from its issuing at a designated restaurant, the worker there couldn't scan the vouchers after multiple tries on all 4 vouchers issued, so we had to pay the food from our own money; For the two return flights they were also full of unfortunate events that caused bad experience and further delay and waste of our time, both flights departed late and the last leg had another significant delay of more than half an hour after touchdown, the gate was for some reason not available so we waited more than half an hour, when we got out of plane it was almost one hour later than the supposed arrival time; The gate you arranged is the farthest in Vancouver airport, also was the luggage pickup location in Seattle airport; We also called customer service for rescheduling help and after a long time wait (more than an hour) we got a call back but the CS representative was equally clueless and unhelpful. Other than a fatal crash, your company couldn't do anything right and provided the worst service possible among the tons of flights we have taken in our lives.

2.0 MediocreXun, Oct 2025YVR - SEA
Read more Air Canada reviews

Air Canada cancelled our flight and reschedule it 26 hours later that completely interrupted my family's long waited Japan trip, it wasn't due to natural reason such as weather but under the company's control. On the day we wasted 9 hours of our time from 6am to 3pm, including a few hours in the customer counter waiting for supervisor to handle our rescheduling. When we came to the counter for rebooking help there were at least 4 employees on the counter but we were told they were not trained to handle customer rebooking, we were also told the supervisor could come 10:30 to handle our rebooking, but she showed up more than one hour later, the end result was exactly the same so the few hours we spent waiting for her was completely wasted; We already prepaid hotel and all the tickets for the our stay in Tokyo so all of the cost for the first day is completed wasted; The $80 meal voucher issues was far less than our financial loss due to the financial cancellation, and it was not surprisingly invalid (as Your company screw up everything possible along the flight), the vouchers were supposed to last 72 hours, when we tried to used it at our lounge next day less than 24 hours from its issuing at a designated restaurant, the worker there couldn't scan the vouchers after multiple tries on all 4 vouchers issued, so we had to pay the food from our own money; For the two return flights they were also full of unfortunate events that caused bad experience and further delay and waste of our time, both flights departed late and the last leg had another significant delay of more than half an hour after touchdown, the gate was for some reason not available so we waited more than half an hour, when we got out of plane it was almost one hour later than the supposed arrival time; The gate you arranged is the farthest in Vancouver airport, also was the luggage pickup location in Seattle airport; We also called customer service for rescheduling help and after a long time wait (more than an hour) we got a call back but the CS representative was equally clueless and unhelpful. Other than a fatal crash, your company couldn't do anything right and provided the worst service possible among the tons of flights we have taken in our lives.

I like the free air Canada wifi and being able to watch things on there. The basic snacks are good, just wish I could have both. If I’m being really picky, the flight attendant who filled my drink, filled it half with fizz and didn’t take the second to let it go down and add more, so I got maybe half a cup of pop.

Seats too small and too cramped, I have stomach cancer and I threw up after the flight . No advance boarding for disabled people. No aisle seats available for disabled people who have to use the washroom frequently. No space for cabin baggage for disabled people who have to carry bulky medications or equipment to use on the flight. Baggage rules and fees are ridiculous. I have been an aeroplan member for 30 years and I fly frequently, but from now on I will choose offshore carriers. .

Lovely flight.....only cold drinks and no more complimentary cookies!

I hope they were able to assign my preferred seat on my connecting flight. Wasn’t sure if it was language issue or they just can’t.

It was good. Short flight and the crew were well organized. I find the seats a little close together. I am tall so more leg room would always be welcome.

Would like whole can of pop for 2. Treats were not great . The garlic pretzels were terrible for someone who can't eat garlic. Passenger was 84.

I found check in difficult because I could only pull up one passenger. I got help.

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

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