YSJ - LHR

C$ 897 Find Cheap Flights from Saint John to London – Compare and Save

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 15/8. 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

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Everything you should know

Cheapest round-trip
C$ 1,151
United Airlines
Tue 29/9Tue 6/10
YSJ - LHR • 2 stops
Cheapest one-way flights
C$ 897
Multiple Airlines
Sat 15/8
YSJ - LHR • 2 stops
Top airlines
Cheapest • from C$ 1,151 (round-trip)
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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We hope you love your trip to Heathrow!
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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

Tue, 29 Sep - Tue, 6 Oct
United Airlines Logo
4:40 p.m. - 10:25 a.m.
YSJ
-
LHR
13h 45m
2 stops
United Airlines Logo
12:00 p.m. - 11:56 a.m.
LHR
-
YSJ
27h 56m
2 stops
C$ 1,151United Airlines
Fri, 2 Oct - Sat, 10 Oct
United Airlines Logo
12:50 p.m. - 9:00 a.m.
YSJ
-
LHR
16h 10m
2 stops
United Airlines Logo
12:00 p.m. - 3:59 p.m.
LHR
-
YSJ
31h 59m
2 stops
C$ 1,154United Airlines
Fri, 2 Oct - Sat, 10 Oct
United Airlines Logo
12:50 p.m. - 9:00 a.m.
YSJ
-
LHR
16h 10m
2 stops
United Airlines Logo
12:00 p.m. - 3:59 p.m.
LHR
-
YSJ
31h 59m
2 stops
C$ 1,157United Airlines
Thu, 10 Sep - Thu, 17 Sep
Lufthansa Logo
12:50 p.m. - 10:40 a.m.
YSJ
-
LHR
17h 50m
2 stops
Lufthansa Logo
11:05 a.m. - 11:51 p.m.
LHR
-
YSJ
16h 46m
2 stops
C$ 1,175Lufthansa
Fri, 2 Oct - Sat, 10 Oct
Multiple Airlines Logo
10:45 a.m. - 9:35 a.m.
YSJ
-
LHR
18h 50m
1 stop
Multiple Airlines Logo
6:50 a.m. - 11:51 p.m.
LHR
-
YSJ
21h 01m
2 stops
C$ 1,180Multiple Airlines
Fri, 2 Oct - Sat, 10 Oct
Multiple Airlines Logo
10:45 a.m. - 6:30 a.m.
YSJ
-
LHR
15h 45m
2 stops
Multiple Airlines Logo
5:40 p.m. - 3:59 p.m.
LHR
-
YSJ
26h 19m
3 stops
C$ 1,213Multiple Airlines
Fri, 2 Oct - Sat, 10 Oct
Multiple Airlines Logo
10:45 a.m. - 6:30 a.m.
YSJ
-
LHR
15h 45m
2 stops
Multiple Airlines Logo
5:40 p.m. - 3:59 p.m.
LHR
-
YSJ
26h 19m
3 stops
C$ 1,216Multiple Airlines
Thu, 10 Sep - Thu, 17 Sep
Multiple Airlines Logo
12:50 p.m. - 11:55 a.m.
YSJ
-
LHR
19h 05m
2 stops
Multiple Airlines Logo
8:30 a.m. - 11:51 p.m.
LHR
-
YSJ
19h 21m
1 stop
C$ 1,272Multiple Airlines
Fri, 2 Oct - Sat, 10 Oct
Air Canada Logo
4:40 p.m. - 10:00 a.m.
YSJ
-
LHR
13h 20m
1 stop
Air Canada Logo
6:00 a.m. - 3:59 p.m.
LHR
-
YSJ
37h 59m
2 stops
C$ 1,307Air Canada
Fri, 2 Oct - Sat, 10 Oct
Air Canada Logo
4:40 p.m. - 10:00 a.m.
YSJ
-
LHR
13h 20m
1 stop
Air Canada Logo
6:00 a.m. - 3:59 p.m.
LHR
-
YSJ
37h 59m
2 stops
C$ 1,312Air 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 5 days.

In the past 5 days, the cheapest round-trip tickets from Saint John to London were found on United Airlines (C$ 1,151) and Lufthansa (C$ 1,175).

Good to know

Cheapest flight

C$ 897
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 5 days, the lowest price for a flight from Saint John to London Heathrow Airport was C$ 878 for a one-way ticket and C$ 1,151 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 11415 reviews
7.3Boarding
7.1Comfort
6.3Food
7.8Crew
6.8Entertainment
Airline reviews

It was great to have a vegetarian meal option, but departure was delayed because they had oversold the flight. Air Canada, you’re in charge of how many tickets are sold: don’t oversell!

6.0 GoodAnonymous, Mar 2026
YYC - LHR
Read more Air Canada reviews

It was great to have a vegetarian meal option, but departure was delayed because they had oversold the flight. Air Canada, you’re in charge of how many tickets are sold: don’t oversell!

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.

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

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.

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.

on time quick service but food so so and seats very small. no leg room. I think passengers should not be bringing so large carry on suitcases and should have free check in. Then boarding and unloading would be faster

After nearly nine years without traveling, my son and I decided to take our first flight, and we chose Air Canada and I’m so glad we did! From start to finish, our experience was nothing short of amazing. The flight itself was smooth, comfortable, and truly enjoyable. The staff were warm, professional, and went above and beyond to make us feel at ease. But what really stood out for me was the luggage tracking feature. Knowing that my bag was scanned onto the same flight I was on gave me such peace of mind. It’s little details like this that make all the difference, especially after not traveling for so long. This trip was incredibly special for us, and Air Canada made it even more memorable. Thank you for such a fantastic experience I wouldn’t hesitate to fly with you again!

Overall the new aircraft’s is good and crew is good. Just overall airline policies and process needs to be better.

Ordered the vegetarian meal. Perhaps the worst in flight meal i ever had. Soggy and sad broccoli, overcooked rice and a FROZEN cheap fruit salad.

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

Information on your arrival and departure airports