YSJ - LHR

C$ 611 Find Cheap Flights from Saint John 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 Saint John to London departing on 18/9. 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 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
Travellers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 22% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Free to useThere are no hidden charges or fees.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flights Deals
Booking Insights
Flights Deals

Cheap Flights from Saint John to London (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 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 Saint John to London

Thu, 11 Sep - Thu, 18 Sep
United Airlines Logo
11:35 a.m. - 6:20 a.m.YSJ-LHR
14h 45m2 stops
United Airlines Logo
8:30 a.m. - 10:49 a.m.LHR-YSJ
30h 19m2 stops
C$ 1,000United Airlines
Find Deal
Sat, 23 Aug - Wed, 3 Sep
United Airlines Logo
5:55 a.m. - 6:20 a.m.YSJ-LHR
20h 25m2 stops
United Airlines Logo
12:15 p.m. - 10:49 a.m.LHR-YSJ
26h 34m2 stops
C$ 1,172United Airlines
Find Deal
Thu, 11 Sep - Thu, 18 Sep
Air Canada Logo
11:35 a.m. - 9:35 a.m.YSJ-LHR
18h 00m1 stop
Air Canada Logo
6:00 a.m. - 12:11 a.m.LHR-YSJ
22h 11m2 stops
C$ 1,217Air Canada
Find Deal
Sat, 23 Aug - Wed, 3 Sep
Air Canada Logo
11:25 a.m. - 6:30 a.m.YSJ-LHR
15h 05m1 stop
Air Canada Logo
6:50 a.m. - 10:49 a.m.LHR-YSJ
31h 59m2 stops
C$ 1,227Air Canada
Find Deal
Sun, 24 Aug - Wed, 3 Sep
Air Canada Logo
11:35 a.m. - 6:30 a.m.YSJ-LHR
14h 55m1 stop
Air Canada Logo
2:05 p.m. - 10:49 a.m.LHR-YSJ
24h 44m1 stop
C$ 1,238Air Canada
Find Deal
Thu, 11 Sep - Thu, 18 Sep
Air Canada Logo
11:35 a.m. - 9:35 a.m.YSJ-LHR
18h 00m1 stop
Air Canada Logo
12:05 p.m. - 12:11 a.m.LHR-YSJ
16h 06m1 stop
C$ 1,242Air Canada
Find Deal
Sat, 23 Aug - Wed, 3 Sep
Air Canada Logo
5:55 a.m. - 10:00 a.m.YSJ-LHR
24h 05m2 stops
Air Canada Logo
5:40 p.m. - 10:49 a.m.LHR-YSJ
21h 09m3 stops
C$ 1,488Air Canada
Find Deal
Booking Insights

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

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

Which airlines provide the cheapest flights from Saint John to London?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Saint John to London were found on United Airlines (C$ 1,000) and Air Canada (C$ 1,217).


Good to know

Low seasonFebruary
Cheapest flightC$ 611
Best time to beat the crowds (5% less expensive on average)
Most popular time to fly and prices are also 4% lower on average.
Flight from Saint John to London

When to book flights from Saint John to London

Are your dates flexible? Find out the best times to travel from Saint John 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 Saint John to London 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$ 444 for a one-way ticket and C$ 727 for a round-trip.

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

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

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

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

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

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

  • How does KAYAK find such low prices on flights from Saint John 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 Saint John to London.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London 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?

    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 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?

    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 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 London

 
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 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.
7.1
Air CanadaOverall score based on 9837 reviews
7.8Crew
6.3Food
7.3Boarding
7.1Comfort
6.8Entertainment
Airline reviews

Flying in the Dreamliner is always comfortable. Though the food options for Air Canada aren't great.

10.0 ExcellentKyle, Jul 2025YYZ - YYC
Read more Air Canada reviews

Flying in the Dreamliner is always comfortable. Though the food options for Air Canada aren't great.

I did not noticed baggage was separate - I had assumed international flights included luggage, so it surprised me I had to pay to check a bag.

Everything could have been better from the planes not being delayed to the rudeness of staff to it was just horrible will not use kayak again or Air Canada I can't see what would ever change my mind now

Business class was not worth the extra charge. Overpriced for slightly larger seat. Nothing special. Small older plane.

Flight got delayed for no reason. And Air Canada was doing 3 boardings via the same gate. It was chaotic!

Bad experience flying with air Canada . Seats not comfortable . Checked bag was delayed and was bought home next day by airport employee. Had to buy toiletries since bag was delayed . No compensation was even suggested . Will not fly air canada again

I n the Toronto airport I had trouble finding my zone. It was 47. I went from Zone 1 to the end of the line.didn't find it. Then saw my zone somewhat by accident over by where you first come in. Signs could be more helpful or more personnel directing people like me.

When I came in the front door in Montreal airport I didn't know where to go, first time traveling. Signs were not directing me.

The AC could have been better . Other than that , all was good

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.

Everything you need to know for your flight from Saint John to London

Information on your arrival and departure airports

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.