YSJ - LHR

C$ 541 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 11/6. 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

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 24% 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
Useful Info
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, 18 Sep - Fri, 26 Sep
United Airlines Logo
11:35 a.m. - 5:55 a.m.YSJ-LHR
14h 20m2 stops
United Airlines Logo
1:00 p.m. - 10:49 a.m.LHR-YSJ
25h 49m2 stops
C$ 998United Airlines
Find Deal
Mon, 30 Jun - Wed, 20 Aug
Air Canada Logo
11:25 a.m. - 9:00 p.m.YSJ-LHR
29h 35m2 stops
Air Canada Logo
12:40 p.m. - 10:50 a.m.LHR-YSJ
26h 10m2 stops
C$ 1,394Air Canada
Find Deal
Mon, 30 Jun - Wed, 20 Aug
Air Canada Logo
6:45 p.m. - 6:35 a.m.YSJ-LHR
31h 50m1 stop
Air Canada Logo
9:30 a.m. - 10:50 a.m.LHR-YSJ
29h 20m1 stop
C$ 1,403Air Canada
Find Deal
Mon, 30 Jun - Wed, 30 Jul
United Airlines Logo
6:45 p.m. - 6:55 a.m.YSJ-LHR
32h 10m2 stops
United Airlines Logo
8:30 a.m. - 10:50 a.m.LHR-YSJ
30h 20m2 stops
C$ 1,424United Airlines
Find Deal
Mon, 30 Jun - Wed, 20 Aug
Air Canada Logo
6:45 p.m. - 11:50 a.m.YSJ-LHR
13h 05m1 stop
Air Canada Logo
8:30 a.m. - 1:15 a.m.LHR-YSJ
20h 45m1 stop
C$ 1,499Air Canada
Find Deal
Tue, 24 Jun - Tue, 1 Jul
United Airlines Logo
5:30 a.m. - 6:20 a.m.YSJ-LHR
20h 50m2 stops
United Airlines Logo
3:20 p.m. - 10:49 a.m.LHR-YSJ
23h 29m2 stops
C$ 1,530United Airlines
Find Deal
Mon, 30 Jun - Wed, 30 Jul
Air Canada Logo
6:45 p.m. - 11:50 a.m.YSJ-LHR
13h 05m1 stop
Air Canada Logo
2:05 p.m. - 10:50 a.m.LHR-YSJ
24h 45m1 stop
C$ 1,593Air Canada
Find Deal
Sat, 31 May - Sun, 1 Jun
 Logo
5:15 a.m. - 9:20 a.m.YSJ-LHR
24h 05m2 stops
 Logo
1:45 p.m. - 12:10 a.m.LHR-YSJ
38h 25m2 stops
C$ 2,132
Find Deal
Sat, 31 May - Sun, 1 Jun
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$ 2,133Air Canada
Find Deal
Sat, 31 May - Sun, 1 Jun
Air Canada Logo
11:35 a.m. - 6:30 a.m.YSJ-LHR
14h 55m1 stop
Air Canada Logo
9:30 a.m. - 12:10 a.m.LHR-YSJ
18h 40m2 stops
C$ 2,142Air Canada
Find Deal
Useful Info

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$ 998) and Air Canada (C$ 1,394).


Good to know

Low seasonFebruary
High seasonOctober
Cheapest flightC$ 541
Best time to beat the crowds (8% less expensive on average)
Most popular time to fly and prices are also 5% 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$ 388 for a one-way ticket and C$ 716 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.

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.
7.0
Air CanadaOverall score based on 9321 reviews
7.3Boarding
6.3Food
6.8Entertainment
7.8Crew
7.0Comfort
Airline reviews

Ground personnel in better mood. Sounded agressive wrt carry on bagage sizing.

10.0 ExcellentAnonymous, May 2025YYC - YUL
Read more Air Canada reviews

Ground personnel in better mood. Sounded agressive wrt carry on bagage sizing.

Very bad I put my stuff down to go through the machine and when it came out it my watch was gone. Then they have the nerve to say I have to file a report that's b.s.

Boarding is a mess. The lines all jammed together and no one knows which line was for which zone. The flight was delayed and the plane taxied on tarmac for more than 30 mins before we could get off. Overall not a bad flight. But the boarding part can do better.

Everything ok, but it was a lot of turbulence during the flight.

From the kind young lady (w/Vancouver air security) who expedited our check-in to U.S. Customs to the Air Canada gate crew who gave us pre-boarding, the flight attendants who actually offered a strong hand to help me board once I had surrendered my rolling walker at the door, they are all reflections of the thoughtful, genuinely helpful Canadians we have grown to appreciate. Water and other beverages were offered throughout the flight to make sure we weren't dehydrated and the cookie was great. (Husband bought the fruit & crackers snack,) I was delighted to see three movies that I would not have otherwise seen and appreciate that AC left the last film viewable until its conclusion although the flight had actually landed. Last, mahalo to the kind strong gentleman who not offered his hand to help me debark the plane, but gave me an AC pin that I'll truly treasure.

The ground staff was so rude in Toronto airport ...very rude and did not answer simple questions, and made me look like a fool. Very rude ground staff.

Would have liked more than just a cookie for breakfast

The flight was delayed and my luggage did not arrive. I paid the luggage fee in advance. Luggage was delivered the next evening but it was the wrong bag. 48 hrs I still do not have my luggage.

Flight left on time. Crew was polite and helpful. Flight arrived early at destination. Had some trouble with in-flight entertainment system (not built in to seat-back) but found a work-around. Good experience.

As usual, terrible. Delayed flight, missed connection and wasted hours at the airport. The only reason I use this airline is because of limited options.

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.