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Cheap flights from Saint John to London from C$ 634

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Saint John to London departing on 24/6. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult

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Find the cheapest flights from Saint John to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
4:30 p.m. - 9:25 p.m.
YSJ
-
LHR
24h 55m
2 stops
United Airlines Logo
6:00 p.m. - 3:49 p.m.
LHR
-
YSJ
25h 49m
2 stops
C$ 1,149United Airlines
Fri, 18 Sep - Thu, 24 Sep
United Airlines Logo
5:40 a.m. - 5:55 a.m.
YSJ
-
LHR
20h 15m
2 stops
United Airlines Logo
6:00 p.m. - 3:49 p.m.
LHR
-
YSJ
25h 49m
2 stops
C$ 1,153United Airlines
Fri, 2 Oct - Tue, 6 Oct
United Airlines Logo
5:40 a.m. - 5:55 a.m.
YSJ
-
LHR
20h 15m
2 stops
United Airlines Logo
6:00 p.m. - 3:49 p.m.
LHR
-
YSJ
25h 49m
2 stops
C$ 1,154United Airlines
Fri, 2 Oct - Tue, 6 Oct
United Airlines Logo
4:30 p.m. - 9:20 p.m.
YSJ
-
LHR
24h 50m
2 stops
United Airlines Logo
8:00 a.m. - 11:51 p.m.
LHR
-
YSJ
19h 51m
2 stops
C$ 1,155United Airlines
Sat, 19 Sep - Mon, 28 Sep
United Airlines Logo
5:40 a.m. - 6:55 a.m.
YSJ
-
LHR
21h 15m
2 stops
United Airlines Logo
4:00 p.m. - 3:49 p.m.
LHR
-
YSJ
27h 49m
2 stops
C$ 1,157United Airlines
Fri, 2 Oct - Tue, 6 Oct
United Airlines Logo
12:50 p.m. - 9:20 a.m.
YSJ
-
LHR
16h 30m
2 stops
United Airlines Logo
9:30 a.m. - 11:51 p.m.
LHR
-
YSJ
18h 21m
2 stops
C$ 1,162United Airlines
Sun, 20 Sep - Fri, 25 Sep
Air Canada Logo
4:35 p.m. - 9:00 p.m.
YSJ
-
LHR
24h 25m
2 stops
Air Canada Logo
2:10 p.m. - 3:55 p.m.
LHR
-
YSJ
29h 45m
2 stops
C$ 1,181Air Canada
Sat, 20 Jun - Sat, 27 Jun
Air Canada Logo
4:35 p.m. - 6:30 a.m.
YSJ
-
LHR
9h 55m
1 stop
Air Canada Logo
5:40 p.m. - 11:55 a.m.
LHR
-
YSJ
22h 15m
1 stop
C$ 1,186Air Canada
Sat, 20 Jun - Sat, 27 Jun
Air Canada Logo
5:40 a.m. - 6:35 a.m.
YSJ
-
LHR
20h 55m
1 stop
Air Canada Logo
2:10 p.m. - 3:55 p.m.
LHR
-
YSJ
29h 45m
2 stops
C$ 1,188Air Canada
Sat, 20 Jun - Sat, 27 Jun
Air Canada Logo
5:35 a.m. - 11:50 a.m.
YSJ
-
LHR
26h 15m
1 stop
Air Canada Logo
7:30 p.m. - 11:52 p.m.
LHR
-
YSJ
32h 22m
2 stops
C$ 1,239Air Canada
Tue, 26 May - Tue, 2 Jun

Air Canada flights from Saint John to London Heathrow Airport

Our best Air Canada deals on Saint John to London Heathrow Airport flight tickets
Air Canada
20 Jun
YSJ4:35 p.m.Saint John
24h 25m
2 stops
LHR9:00 p.m.London Heathrow
27 Jun
LHR2:10 p.m.London Heathrow
29h 45m
2 stops
YSJ3:55 p.m.Saint John
C$ 1,181
Air Canada
20 Jun
YSJ4:35 p.m.Saint John
9h 55m
1 stop
LHR6:30 a.m.London Heathrow
27 Jun
LHR5:40 p.m.London Heathrow
22h 15m
1 stop
YSJ11:55 a.m.Saint John
C$ 1,186
Air Canada
20 Jun
YSJ5:40 a.m.Saint John
20h 55m
1 stop
LHR6:35 a.m.London Heathrow
27 Jun
LHR2:10 p.m.London Heathrow
29h 45m
2 stops
YSJ3:55 p.m.Saint John
C$ 1,188

United Airlines flights from Saint John to London Heathrow Airport

Our best United Airlines deals on Saint John to London Heathrow Airport flight tickets
United Airlines
18 May
YSJ4:30 p.m.Saint John
24h 55m
2 stops
LHR9:25 p.m.London Heathrow
27 May
LHR6:00 p.m.London Heathrow
25h 40m
2 stops
YSJ3:40 p.m.Saint John
C$ 1,146
United Airlines
18 Sep
YSJ4:30 p.m.Saint John
24h 55m
2 stops
LHR9:25 p.m.London Heathrow
24 Sep
LHR6:00 p.m.London Heathrow
25h 49m
2 stops
YSJ3:49 p.m.Saint John
C$ 1,149
United Airlines
18 May
YSJ4:30 p.m.Saint John
24h 55m
2 stops
LHR9:25 p.m.London Heathrow
27 May
LHR8:00 a.m.London Heathrow
35h 40m
2 stops
YSJ3:40 p.m.Saint John
C$ 1,150

momondo Fare Finder

 
Customize your flight search to find flights from Saint John to London Heathrow Airport that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 96,600 searches. Data last updated 10 May 2026.
Use the filters below to find and compare flights from Saint John to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Fri 18/9

4:30 p.m.-9:25 p.m.

2 stops24h 55m

London Heathrow

Thu 24/9

6:00 p.m.-3:49 p.m.

2 stops25h 49m

C$ 1,149

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Fri 2/10

5:40 a.m.-5:55 a.m.

2 stops20h 15m

London Heathrow

Tue 6/10

6:00 p.m.-3:49 p.m.

2 stops25h 49m

C$ 1,153

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Fri 2/10

5:40 a.m.-5:55 a.m.

2 stops20h 15m

London Heathrow

Tue 6/10

6:00 p.m.-3:49 p.m.

2 stops25h 49m

C$ 1,154

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Sat 19/9

4:30 p.m.-9:20 p.m.

2 stops24h 50m

London Heathrow

Mon 28/9

8:00 a.m.-11:51 p.m.

2 stops19h 51m

C$ 1,155

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Fri 2/10

5:40 a.m.-6:55 a.m.

2 stops21h 15m

London Heathrow

Tue 6/10

4:00 p.m.-3:49 p.m.

2 stops27h 49m

C$ 1,157

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Sun 20/9

12:50 p.m.-9:20 a.m.

2 stops16h 30m

London Heathrow

Fri 25/9

9:30 a.m.-11:51 p.m.

2 stops18h 21m

C$ 1,162

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Sat 20/6

4:35 p.m.-9:00 p.m.

2 stops24h 25m

London Heathrow

Sat 27/6

2:10 p.m.-3:55 p.m.

2 stops29h 45m

C$ 1,181
Quickest round-trip

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Sat 20/6

4:35 p.m.-6:30 a.m.

1 stop9h 55m

London Heathrow

Sat 27/6

5:40 p.m.-11:55 a.m.

1 stop22h 15m

C$ 1,186

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Sat 20/6

5:40 a.m.-6:35 a.m.

1 stop20h 55m

London Heathrow

Sat 27/6

2:10 p.m.-3:55 p.m.

2 stops29h 45m

C$ 1,188

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Tue 26/5

5:35 a.m.-11:50 a.m.

1 stop26h 15m

London Heathrow

Tue 2/6

7:30 p.m.-11:52 p.m.

2 stops32h 22m

C$ 1,239

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

When to book flights from Saint John to London Heathrow Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Saint John to London Heathrow Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Saint John to London Heathrow Airport (YSJ to LHR) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Saint John to London Heathrow Airport

Fastest flight time

20h 15m

Direct flights

None
The fastest flight from Saint John to London Heathrow Airport takes 20h 15m
There are no direct flights from Saint John to London Heathrow Airport. There are no popular flight routes from Saint John to London Heathrow Airport.
Search flight deals

Frequently asked questions about flying from Saint John to London Heathrow Airport

  • How far is Saint John to London Heathrow by plane?

    Saint John and London Heathrow are 4726.9 km apart from one another. By plane, this route typically takes 20h 15m.

  • When did momondo last update prices for flights from Saint John Airport to London Heathrow Airport?

    Prices for flights from Saint John Airport to London Heathrow Airport were last updated today.

  • How many operators does momondo search for flights from Saint John Airport to London Heathrow Airport?

  • How old do you have to be to fly from Saint John Airport to London Heathrow Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Saint John Airport to London Heathrow Airport.

  • What documentation or ID do you need to fly to London Heathrow Airport?

    The travel and health documents required for your trip to London Heathrow Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at London Heathrow Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from Saint John to London Heathrow Airport?

Best airlines flying from Saint John to London Heathrow Airport

Compare and see reviews for airlines that fly from Saint John to London Heathrow Airport with momondo
Airline
Rating
Free Cancellation
Price
Air CanadaPriceFrom C$ 1,119Free CancellationRating
7.1
11,012 reviews
Search Air Canada flights

Frequently asked questions about flying from Saint John to London Heathrow Airport

  • How do I get Price Alerts for flights from Saint John to London Heathrow Airport?

    Confirm your travel details to search for the latest offers for flights from Saint John to London Heathrow Airport. While browsing offers there will be the option to toggle “Price Alerts”. You’ll then receive updates when prices for the flight route increase or decrease.

  • How can I save money on flights from Saint John to London Heathrow Airport with momondo?

    With “Price Forecast”, learn how soon you should book your flight in advance. Down to the day of week and time of day, our information can inform you on the ideal time to book to save on your travel. Our “Price Calendar” shows you at a quick glance when to book your travel for lower rates. By setting “Price Alerts” you can monitor changes in price and target the ideal time to book. Search for your trip destination by budget amount via our “Explore” feature. Whether you’re looking for ideas for your next travel adventure or cost-cutting tips, our “Discover” content is a great place to start.

  • How does momondo find its flight prices?

    We compare prices from 700+ competitors to help you find the price that works best for you. momondo operates in over 30 international markets, bringing you access to a wide range of fares and deals. Search for your travel using momondo for a diverse range of options from airlines and OTAs.

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Hounslow
Poole
Milton Keynes
Wembley
Slough
Gatwick
Swindon
Wokingham
Salisbury
Stratford-upon-Avon
Crawley
Feltham
Hayes
Waterlooville
Chelmsford
Basingstoke
Dover
Worthing
Woking
Ipswich

Why use momondo?

Why should I use momondo to find a flight deal from Saint John to London?

Finding the right flight to London from Saint John is quick and easy when you have a range of options in front of you, from reputable agents and recognizable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to London quick and easy, saving you time and money.

Can I find flights from Saint John to London with flexible booking policies on momondo?

momondo does allow users to show only those flights to London from Saint John which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Saint John to London?

Once you have performed a search for Saint John to London flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Saint John to London right now. Can momondo alert me if prices change?

Price alerts on flights to London from Saint John are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your London Heathrow Airport trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
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