YSJ - LHR

C$ 605 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 Heathrow departing on 15/6. 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
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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Everything you should know

Cheapest round-trip
C$ 1,138
United Airlines
Mon 18/5Wed 27/5
YSJ - LHR • 2 stops
Cheapest one-way flights
C$ 605
Multiple Airlines
Mon 15/6
YSJ - LHR • 2 stops
Top airlines
United Airlines
Cheapest • from C$ 1,138 (round-trip)
Air Canada
Best reviews • 7.1 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Direct flights
Not available
There are currently no direct flights between Saint John and Heathrow. You’ll need at least 1 connection.
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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!
Flight Deals
Booking Insights
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

Mon, 18 May - Wed, 27 May
United Airlines Logo
4:30 p.m. - 9:35 p.m.
YSJ
-
LHR
25h 05m
2 stops
United Airlines Logo
4:40 p.m. - 3:40 p.m.
LHR
-
YSJ
27h 00m
2 stops
C$ 1,138United Airlines
Fri, 22 May - Tue, 26 May
United Airlines Logo
5:00 a.m. - 7:15 a.m.
YSJ
-
LHR
22h 15m
2 stops
United Airlines Logo
12:15 p.m. - 3:40 p.m.
LHR
-
YSJ
31h 25m
2 stops
C$ 1,145United Airlines
Fri, 22 May - Tue, 26 May
United Airlines Logo
5:00 a.m. - 7:15 a.m.
YSJ
-
LHR
22h 15m
2 stops
United Airlines Logo
12:15 p.m. - 3:40 p.m.
LHR
-
YSJ
31h 25m
2 stops
C$ 1,149United Airlines
Fri, 22 May - Tue, 26 May
United Airlines Logo
5:00 a.m. - 7:15 a.m.
YSJ
-
LHR
22h 15m
2 stops
United Airlines Logo
3:20 p.m. - 3:40 p.m.
LHR
-
YSJ
28h 20m
2 stops
C$ 1,156United Airlines
Mon, 27 Apr - Mon, 4 May
United Airlines Logo
5:35 a.m. - 6:45 a.m.
YSJ
-
LHR
21h 10m
2 stops
United Airlines Logo
4:40 p.m. - 11:55 a.m.
LHR
-
YSJ
23h 15m
2 stops
C$ 1,161United Airlines
Mon, 18 May - Wed, 27 May
Air Canada Logo
4:30 p.m. - 10:00 a.m.
YSJ
-
LHR
13h 30m
1 stop
Air Canada Logo
8:40 a.m. - 3:40 p.m.
LHR
-
YSJ
35h 00m
2 stops
C$ 1,314Air Canada
Mon, 27 Apr - Mon, 4 May
Air Canada Logo
11:55 a.m. - 10:00 a.m.
YSJ
-
LHR
18h 05m
1 stop
Air Canada Logo
6:50 a.m. - 3:40 p.m.
LHR
-
YSJ
12h 50m
2 stops
C$ 1,320Air Canada
Mon, 18 May - Wed, 27 May
Air Canada Logo
4:30 p.m. - 10:00 a.m.
YSJ
-
LHR
13h 30m
1 stop
Air Canada Logo
9:30 a.m. - 3:40 p.m.
LHR
-
YSJ
10h 10m
1 stop
C$ 1,336Air Canada
Mon, 27 Apr - Mon, 4 May
Air Canada Logo
11:55 a.m. - 10:00 a.m.
YSJ
-
LHR
18h 05m
1 stop
Air Canada Logo
2:10 p.m. - 11:52 p.m.
LHR
-
YSJ
13h 42m
1 stop
C$ 1,345Air Canada
Fri, 22 May - Tue, 26 May
Air Canada Logo
4:30 p.m. - 6:30 a.m.
YSJ
-
LHR
10h 00m
1 stop
Air Canada Logo
6:00 a.m. - 3:40 p.m.
LHR
-
YSJ
37h 40m
2 stops
C$ 1,355Air Canada
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 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$ 1,138) and Air Canada (C$ 1,314).

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Good to know

Low seasonOctober
Cheapest flightC$ 605
Best time to beat the crowds (20% less expensive on average)
Most popular time to fly (18% more expensive on average)
Flight from Saint John to London

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 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$ 605 for a one-way ticket and C$ 1,138 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 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 10811 reviews
7.1Comfort
6.3Food
7.8Crew
6.8Entertainment
7.3Boarding
Airline reviews

I liked the quiet airport and no queue. I don't like that when booking it is not clear that there is teared economy, that you have to pay extra for choosing a seat and for your luggage both ways. We didn't find this out until checking in. It turned out not very economical.

2.0 Mediocrejane, Jan 2026
YVR - LHR
Read more Air Canada reviews

I liked the quiet airport and no queue. I don't like that when booking it is not clear that there is teared economy, that you have to pay extra for choosing a seat and for your luggage both ways. We didn't find this out until checking in. It turned out not very economical.

Delay, after delay, after delay. It was hard as an adult travelling alone. I felt bad for the families with young children to entertain for several hours. Agents and crew performed to their usual good standard. Air Canada, never again.

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

Everything was great, clean plane and washrooms. Flight was on time, excellent boarding process

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

Information on your arrival and departure airports

Saint John (YSJ)
Heathrow (LHR)