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Cheap flights from Saint John to London from C$ 452

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 6/7. Fares are subject to change and may not be available on all flights or dates of travel.
YSJ — LON
19 Jul — 26 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 19 June 2026.

Fri 9/105:40 a.m.
YSJ
-
LHR
1 stop26h 10m
Air Canada
Sun 11/1011:05 a.m.
LHR
-
YSJ
2 stops32h 54m
Air Canada
Deal found 18/6C$ 1,147
Thu 17/94:40 p.m.
YSJ
-
LHR
2 stops24h 45m
United Airlines
Sat 3/109:30 a.m.
LHR
-
YSJ
2 stops34h 29m
United Airlines
Deal found 18/6C$ 1,159
Wed 16/95:40 a.m.
YSJ
-
LHR
2 stops20h 15m
United Airlines
Sun 20/99:30 a.m.
LHR
-
YSJ
2 stops34h 29m
United Airlines
Deal found 14/6C$ 1,168
Fri 3/710:45 a.m.
YSJ
-
LGW
1 stop20h 00m
Multiple Airlines
Tue 7/711:35 a.m.
LGW
-
YSJ
2 stops26h 25m
Multiple Airlines
Deal found 15/6C$ 1,243
Thu 17/94:40 p.m.
YSJ
-
LHR
2 stops24h 45m
Lufthansa
Sat 3/109:30 a.m.
LHR
-
YSJ
1 stop10h 29m
Lufthansa
Deal found 18/6C$ 1,296
Thu 17/94:40 p.m.
YSJ
-
LHR
1 stop13h 20m
Multiple Airlines
Sat 3/109:30 a.m.
LHR
-
YSJ
1 stop10h 29m
Multiple Airlines
Deal found 18/6C$ 1,322
Wed 16/94:40 p.m.
YSJ
-
LHR
1 stop13h 20m
Air Canada
Sun 20/96:00 a.m.
LHR
-
YSJ
2 stops21h 51m
Air Canada
Deal found 14/6C$ 1,329
Mon 3/810:45 a.m.
YSJ
-
LGW
2 stops30h 10m
Multiple Airlines
Mon 10/86:00 a.m.
LGW
-
YSJ
3 stops46h 55m
Multiple Airlines
Deal found 19/6C$ 1,351
Wed 15/710:45 a.m.
YSJ
-
LGW
1 stop17h 10m
Multiple Airlines
Wed 22/712:40 p.m.
LGW
-
YSJ
2 stops31h 05m
Multiple Airlines
Deal found 15/6C$ 1,596
Fri 3/710:45 a.m.
YSJ
-
LGW
2 stops17h 10m
Multiple Airlines
Sat 4/711:35 a.m.
LGW
-
YSJ
1 stop15h 40m
Multiple Airlines
Deal found 17/6C$ 1,679

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 19 June 2026.

Round-trip from

C$ 1,147

One-way from

C$ 452
Air Canada
  • Air Canada
  • 9/10-11/10
  • 3 total stops
  • 59h 04m total
  • Saint John to London
Search Deals
6/7
  • 6/7
  • 3 total stops
  • 44h 20m 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 19 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

Fri 9/10

5:40 a.m.-11:50 a.m.

1 stop26h 10m

London Heathrow

Sun 11/10

11:05 a.m.-3:59 p.m.

2 stops32h 54m

C$ 1,147

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Thu 17/9

4:40 p.m.-9:25 p.m.

2 stops24h 45m

London Heathrow

Sat 3/10

9:30 a.m.-3:59 p.m.

2 stops34h 29m

C$ 1,159

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Wed 16/9

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

2 stops20h 15m

London Heathrow

Sun 20/9

9:30 a.m.-3:59 p.m.

2 stops34h 29m

C$ 1,168

Saint JohnLondon

YSJ - LGW

YSJLGW

Saint John

Fri 3/7

10:45 a.m.-9:50 a.m.

2 stops19h 05m

London Gatwick

Tue 7/7

11:35 a.m.-10:00 a.m.

2 stops26h 25m

C$ 1,271

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Thu 17/9

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

1 stop13h 20m

London Heathrow

Sat 3/10

9:30 a.m.-3:59 p.m.

1 stop10h 29m

C$ 1,322

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Wed 16/9

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

1 stop13h 20m

London Heathrow

Sun 20/9

6:00 a.m.-11:51 p.m.

2 stops21h 51m

C$ 1,329

Saint JohnLondon

YSJ - LGW

YSJLGW

Saint John

Mon 3/8

10:45 a.m.-8:55 p.m.

2 stops30h 10m

London Gatwick

Mon 10/8

6:10 a.m.-12:55 a.m.

2 stops22h 45m

C$ 1,388

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Mon 3/8

4:40 p.m.-11:50 a.m.

2 stops15h 10m

London Heathrow

Mon 10/8

9:30 a.m.-12:55 a.m.

2 stops19h 25m

C$ 1,405
Quickest round-trip

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Fri 3/7

4:40 p.m.-6:30 a.m.

1 stop9h 50m

London Heathrow

Tue 7/7

9:30 a.m.-3:45 p.m.

1 stop10h 15m

C$ 1,456

Saint JohnLondon

YSJ - LGW

YSJLGW

Saint John

Wed 15/7

10:45 a.m.-7:55 a.m.

1 stop17h 10m

London Gatwick

Wed 22/7

12:40 p.m.-3:45 p.m.

3 stops31h 05m

C$ 1,598

Flights are sorted by cheapest round-trip flights first.

Deals found on 17/6

Showing 1-10 of 13 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
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 19 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
11,220 reviews
Check prices

Boarding

7.3

Entertainment

6.8

Comfort

7.1

Food

6.3

Crew

7.8

Overall

7.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jun 2026

YUL - LYS

The flight was cancelled. We were rebooked the next day on Air France but had a 12 hour layover in Paris. We lost 1 1/2 days of our vacation.
Air Canada
7.1
Good
11,220 reviews
Air Canada
7.1
Good
11,220 reviews
Check prices

Boarding

7.3

Entertainment

6.8

Comfort

7.1

Food

6.3

Crew

7.8

Overall

7.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jun 2026

YUL - LYS

The flight was cancelled. We were rebooked the next day on Air France but had a 12 hour layover in Paris. We lost 1 1/2 days of our vacation.

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 24h 45m. The time it takes to get you to your destination can typically vary by up to 1h 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$ 1,209, 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

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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 19 June 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 1,209AverageC$ 1,479FlexibilityNo 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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