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Cheap flights from Saint John to London from C$ 409

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 15/6. Fares are subject to change and may not be available on all flights or dates of travel.
YSJ — LON
5 Jul — 12 Jul1
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 5 June 2026.

Thu 11/64:30 p.m.
YSJ
-
LHR
2 stops24h 30m
Air Canada
Mon 15/68:40 a.m.
LHR
-
YSJ
2 stops30h 47m
Air Canada
Deal found 1/6C$ 1,065
Sat 6/64:30 p.m.
YSJ
-
LHR
2 stops33h 25m
United Airlines
Sat 13/610:25 a.m.
LHR
-
YSJ
2 stops33h 25m
United Airlines
Deal found 1/6C$ 1,157
Sat 6/64:30 p.m.
YSJ
-
LHR
1 stop10h 00m
Air Canada
Sat 13/69:30 a.m.
LHR
-
YSJ
1 stop10h 20m
Air Canada
Deal found 1/6C$ 1,190
Thu 11/65:35 a.m.
YSJ
-
LHR
2 stops21h 10m
United Airlines
Sat 20/66:00 p.m.
LHR
-
YSJ
2 stops25h 55m
United Airlines
Deal found 3/6C$ 1,305
Thu 11/64:30 p.m.
YSJ
-
LHR
1 stop13h 30m
Multiple Airlines
Sat 20/68:05 p.m.
LHR
-
YSJ
2 stops47h 50m
Multiple Airlines
Deal found 3/6C$ 1,312
Thu 11/65:35 a.m.
YSJ
-
LHR
2 stops21h 10m
United Airlines
Mon 15/64:00 p.m.
LHR
-
YSJ
2 stops35h 52m
United Airlines
Deal found 2/6C$ 1,314
Wed 1/710:45 a.m.
YSJ
-
LGW
2 stops29h 25m
Multiple Airlines
Wed 8/710:00 p.m.
LGW
-
YSJ
3 stops29h 50m
Multiple Airlines
Deal found 1/6C$ 1,437
Thu 11/612:20 p.m.
YSJ
-
LGW
2 stops30h 30m
Multiple Airlines
Sat 20/66:35 a.m.
LGW
-
YSJ
3 stops33h 20m
Multiple Airlines
Deal found 3/6C$ 1,472
Fri 24/710:45 a.m.
YSJ
-
LGW
2 stops20h 50m
Multiple Airlines
Fri 31/76:10 a.m.
LGW
-
YSJ
3 stops21h 05m
Multiple Airlines
Deal found 1/6C$ 1,715
Thu 16/76:55 a.m.
YSJ
-
LGW
2 stops22h 30m
Multiple Airlines
Thu 23/712:40 p.m.
LGW
-
YSJ
1 stop25h 20m
Multiple Airlines
Deal found 1/6C$ 2,276

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 5 June 2026.

Round-trip from

C$ 1,430

One-way from

C$ 409
Air Canada
  • Air Canada
  • 1/7-8/7
  • 2 total stops
  • 37h 05m total
  • Saint John to London
Search Deals
15/6
  • 15/6
  • 3 total stops
  • 53h 30m 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 5 June 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

Wed 1/7

5:00 a.m.-8:35 a.m.

2 stops23h 35m

London Heathrow

Wed 8/7

12:40 p.m.-3:49 p.m.

2 stops31h 09m

C$ 1,432
Quickest round-trip

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Sat 20/6

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

2 stops24h 25m

London Heathrow

Sun 5/7

9:30 a.m.-3:49 p.m.

1 stop10h 19m

C$ 1,433

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Sat 20/6

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

2 stops48h 25m

London Heathrow

Sun 5/7

12:40 p.m.-11:50 p.m.

2 stops39h 10m

C$ 1,448

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Thu 16/7

4:40 p.m.-10:00 a.m.

1 stop13h 20m

London Heathrow

Thu 23/7

5:40 p.m.-3:45 p.m.

2 stops26h 05m

C$ 1,512

Saint JohnLondon

YSJ - LGW

YSJLGW

Saint John

Wed 1/7

10:45 a.m.-10:45 a.m.

1 stop20h 00m

London Gatwick

Wed 8/7

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

2 stops16h 15m

C$ 1,589

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Sat 18/7

12:50 p.m.-10:40 a.m.

2 stops17h 50m

London Heathrow

Sat 25/7

6:00 p.m.-3:45 p.m.

2 stops25h 45m

C$ 1,713

Saint JohnLondon

YSJ - LGW

YSJLGW

Saint John

Fri 24/7

10:45 a.m.-11:35 a.m.

2 stops20h 50m

London Gatwick

Fri 31/7

6:10 a.m.-11:15 p.m.

3 stops21h 05m

C$ 1,715

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Fri 11/9

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

2 stops15h 25m

London Heathrow

Sat 19/9

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

2 stops19h 51m

C$ 1,779

Saint JohnLondon

YSJ - LGW

YSJLGW

Saint John

Thu 16/7

6:55 a.m.-9:25 a.m.

2 stops22h 30m

London Gatwick

Thu 23/7

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

1 stop25h 20m

C$ 2,276
Cheapest one-way

Saint JohnLondon

YSJ - LGW

YSJLGW

Saint John

Wed 17/6

10:45 a.m.-5:05 p.m.

3 stops26h 20m

C$ 480

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/6

Showing 1-10 of 27 resultsSorted by cheapest first
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2
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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
No data available for this route at this time. Please check back soon.

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 5 June 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
11,127 reviews
Check prices

Crew

7.8

Boarding

7.3

Comfort

7.1

Food

6.3

Entertainment

6.8

Overall

7.1

Reviews

1 / 20
2.0
Mediocre

Lori,May 2026

YYZ - YFC

Didn't land, sent back to Toronto. No food, no accommodation, no help at all!!
Air Canada
7.1
Good
11,127 reviews
Air Canada
7.1
Good
11,127 reviews
Check prices

Crew

7.8

Boarding

7.3

Comfort

7.1

Food

6.3

Entertainment

6.8

Overall

7.1

Reviews

1 / 20
2.0
Mediocre

Lori,May 2026

YYZ - YFC

Didn't land, sent back to Toronto. No food, no accommodation, no help at all!!

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 17h 50m. The time it takes to get you to your destination can typically vary by up to 5h 45m. 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$ 1,190, 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.

See more FAQs

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
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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 5 June 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 1,190AverageC$ 1,408FlexibilityNo 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?

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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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