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Cheap flights from Saint John to London from C$ 457

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 20/5. Fares are subject to change and may not be available on all flights or dates of travel.
YSJ — LON
9 May — 16 May1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from St John to London

Enter your travel dates to find the best prices.

Cheapest flights from St John to London
Explore the most affordable flight options available from St John to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 9 April 2026.

Tue 22/94:30 p.m.
YSJ
-
LHR
1 stop13h 30m
Air Canada
Sat 10/107:30 p.m.
LHR
-
YSJ
2 stops32h 21m
Air Canada
Deal found 5/4C$ 1,052
Mon 18/54:30 p.m.
YSJ
-
LHR
2 stops24h 55m
United Airlines
Wed 27/512:15 p.m.
LHR
-
YSJ
2 stops31h 25m
United Airlines
Deal found 5/4C$ 1,138
Wed 6/54:30 p.m.
YSJ
-
LHR
2 stops15h 25m
United Airlines
Sun 10/54:40 p.m.
LHR
-
YSJ
2 stops35h 12m
United Airlines
Deal found 5/4C$ 1,144
Tue 2/64:30 p.m.
YSJ
-
LHR
2 stops24h 10m
United Airlines
Tue 30/64:40 p.m.
LHR
-
YSJ
2 stops27h 10m
United Airlines
Deal found 8/4C$ 1,191
Wed 6/54:30 p.m.
YSJ
-
LHR
2 stops15h 25m
United Airlines
Wed 13/512:00 p.m.
LHR
-
YSJ
2 stops27h 57m
United Airlines
Deal found 8/4C$ 1,198
Tue 2/64:30 p.m.
YSJ
-
LHR
1 stop13h 30m
Air Canada
Tue 30/69:30 a.m.
LHR
-
YSJ
1 stop10h 20m
Air Canada
Deal found 8/4C$ 1,267
Wed 6/54:30 p.m.
YSJ
-
LHR
1 stop10h 00m
Air Canada
Wed 13/56:00 a.m.
LHR
-
YSJ
2 stops37h 40m
Air Canada
Deal found 8/4C$ 1,310
Fri 7/812:00 p.m.
YSJ
-
LGW
3 stops28h 45m
Multiple Airlines
Fri 4/99:50 a.m.
LGW
-
YSJ
2 stops19h 35m
Multiple Airlines
Deal found 7/4C$ 1,634
Tue 2/612:00 p.m.
YSJ
-
LGW
2 stops17h 25m
Multiple Airlines
Tue 30/612:40 p.m.
LGW
-
YSJ
1 stop25h 20m
Multiple Airlines
Deal found 8/4C$ 1,730

Find flight deals from St John to London

Discover tips and strategies to find the most affordable flight options for your journey from St John (YSJ) to London (LON). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 9 April 2026.

Round-trip from

C$ 1,052

One-way from

C$ 457
Air Canada
  • Air Canada
  • 22/9-10/10
  • 3 total stops
  • 45h 51m total
  • Saint John to London
Search Deals
20/5
  • 20/5
  • 3 total stops
  • 27h 40m total
  • Saint John to London
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from St John to London 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, Cheapflights users made 629,999 searches. Data last updated 9 April 2026.
Use the filters below to find and compare flights from Saint John to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Tue 22/9

4:30 p.m.-10:00 a.m.

1 stop13h 30m

London Heathrow

Sat 10/10

7:30 p.m.-11:51 p.m.

2 stops32h 21m

C$ 1,052

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Mon 18/5

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

2 stops24h 55m

London Heathrow

Wed 27/5

12:15 p.m.-3:40 p.m.

2 stops31h 25m

C$ 1,138

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Wed 6/5

4:30 p.m.-11:55 a.m.

2 stops15h 25m

London Heathrow

Sun 10/5

4:40 p.m.-11:52 p.m.

2 stops35h 12m

C$ 1,144

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Tue 2/6

4:30 p.m.-8:40 p.m.

2 stops24h 10m

London Heathrow

Tue 30/6

4:40 p.m.-3:50 p.m.

2 stops27h 10m

C$ 1,191

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Mon 25/5

5:35 a.m.-6:45 a.m.

2 stops21h 10m

London Heathrow

Fri 29/5

3:20 p.m.-3:40 p.m.

2 stops28h 20m

C$ 1,198

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Wed 6/5

4:30 p.m.-11:55 a.m.

2 stops15h 25m

London Heathrow

Wed 13/5

12:00 p.m.-11:57 a.m.

2 stops27h 57m

C$ 1,198

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Mon 18/5

4:30 p.m.-10:00 a.m.

1 stop13h 30m

London Heathrow

Wed 27/5

12:40 p.m.-3:40 p.m.

2 stops31h 00m

C$ 1,352

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Fri 7/8

4:30 p.m.-8:40 p.m.

2 stops24h 10m

London Heathrow

Fri 4/9

8:00 a.m.-3:50 p.m.

2 stops35h 50m

C$ 1,358

Saint JohnLondon

YSJ - LGW

YSJLGW

Saint John

Fri 7/8

12:00 p.m.-8:45 p.m.

3 stops28h 45m

London Gatwick

Fri 4/9

9:50 a.m.-1:25 a.m.

2 stops19h 35m

C$ 1,634
Quickest round-trip

Saint JohnLondon

YSJ - LGW

YSJLGW

Saint John

Tue 2/6

12:00 p.m.-9:25 a.m.

2 stops17h 25m

London Gatwick

Tue 30/6

12:40 p.m.-10:00 a.m.

1 stop25h 20m

C$ 1,730

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/4

Showing 1-10 of 16 resultsSorted by cheapest first
1
2

Best time to book a flight from St John to London

Have a flexible travel schedule? Discover the best time to fly to London from St John with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

What is the cheapest month to book a flight from Saint John to London?

Currently, March is the cheapest month in which you can book a flight from Saint John to London (average of C$ 969). Flying from Saint John to London in January is currently the most expensive (average of C$ 1,346). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What’s the top layover airport for flights from Saint John to London?

Share of one-stop round-trip flights from Saint John to London chosen by Cheapflights users in the past 12 months, using the same layover each way.

Toronto (YYZ) – chosen by Cheapflights users on 92% of one-stop itineraries from Saint John to London on Cheapflights.

What’s the cheapest layover airport for flights from Saint John to London?

Average round-trip fare for 1-stop flights from Saint John to London, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Toronto (YYZ) is the most affordable 1-stop option, with an average round-trip price of C$ 1,265.

What’s the fastest layover option from Saint John to London?

Shortest average travel time for 1-stop one-way flights from Saint John to London, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Montreal (YUL) have the shortest average one-way travel time for 1-stop routes: 10h 00m.

Which airport typically offers the quickest layover for flights from Saint John to London?

Average layover duration for 1-stop one-way flights from Saint John to London, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Montreal (YUL) offer the fastest connection on this route, with an average layover time of 1h 52m.

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to London. Reviews last updated 9 April 2026.
Check out reviews from past customers who have flown with Air Canada from Saint John to London to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air Canada
7.1
Good
10,907 reviews
Check prices

Entertainment

6.8

Food

6.3

Boarding

7.3

Comfort

7.1

Crew

7.8

Overall

7.1

Reviews

1 / 20
6.0
Good

Paula,Mar 2026

YVR - PSP

Everything was OK, but we waited on the tarmac for an hour and 20 minutes after landing because there was no available gate. This is a daily occurrence at the Palm Springs airport, and happens with Air Canada and WestJet constantly.
Air Canada
7.1
Good
10,907 reviews
Air Canada
7.1
Good
10,907 reviews
Check prices

Entertainment

6.8

Food

6.3

Boarding

7.3

Comfort

7.1

Crew

7.8

Overall

7.1

Reviews

1 / 20
6.0
Good

Paula,Mar 2026

YVR - PSP

Everything was OK, but we waited on the tarmac for an hour and 20 minutes after landing because there was no available gate. This is a daily occurrence at the Palm Springs airport, and happens with Air Canada and WestJet constantly.

Related info for your journey

Find useful and relevant information for your journey from St John to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Saint John to London?

    Located just 15.1 km from the city centre, Saint John is the airport most travellers will use when flying to London from Saint John. Booking flights from Saint John (YSJ) to London should be relatively easy as there are 0 daily outbound flights to London from 1 airline.

  • How long is the flight from Saint John to London?

    Airlines like Air Canada and United Airlines fly from Saint John to London in about 13h 30m. The time it takes to get you to your destination can typically vary by up to 11h 25m. Saint John and London are separated by a distance of 4712 km. This flight may include one or multiple stops.

  • What is the cheapest airline to fly from Saint John to London round-trip?

    Currently priced at C$ 1,185, Air Canada will fly you from Saint John to London and back. In addition to Air Canada, many other airlines offer competitively priced options for your trip.

  • Can I find deals for flights from St John to London that include hotel bookings?

    Yes. In addition to deals on St John to London flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St John to London?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St John to London.

  • Can I find deals for business class flights from St John to London?

    Yes. Cheapflights offers flight deals from St John to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Saint John to London?

    Currently, March is the cheapest month in which you can book a flight from Saint John to London (average of C$ 969). Flying from Saint John to London in January is currently the most expensive (average of C$ 1,346). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Gatwick
Twickenham
Bromley
Sutton
Slough
Marlow
Cobham
Watford
Luton
High Wycombe
Hounslow

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Top airline flying from St John to London

Discover the top airline that operate flights from St John to London. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 9 April 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 1,185AverageC$ 1,317FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

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How does Cheapflights help users find flights from St John to London?

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Why should you use Cheapflights to find cheap flight tickets from St John to London?

Cheapflights simply makes it quick and affordable to book flights from St John to London by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from St John to London with no change fees?

Certainly. Search results for flights to London from St John shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from St John to London become cheaper?

Of course! You can now track prices for flights from St John to London and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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