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Cheap flights from Saint John to London from C$ 619

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 10/7. Fares are subject to change and may not be available on all flights or dates of travel.
YSJ — LON
17 May — 24 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 17 April 2026.

Sat 30/54:30 p.m.
YSJ
-
LHR
2 stops48h 30m
Air Canada
Sat 6/66:00 a.m.
LHR
-
YSJ
2 stops21h 52m
Air Canada
Deal found 15/4C$ 1,031
Wed 27/510:45 a.m.
YSJ
-
LGW
3 stops27h 40m
Multiple Airlines
Wed 3/68:50 p.m.
LGW
-
YSJ
2 stops22h 55m
Multiple Airlines
Deal found 12/4C$ 1,108
Mon 18/54:30 p.m.
YSJ
-
LHR
2 stops24h 55m
United Airlines
Wed 27/54:40 p.m.
LHR
-
YSJ
2 stops27h 00m
United Airlines
Deal found 12/4C$ 1,137
Fri 29/54:30 p.m.
YSJ
-
LHR
2 stops15h 25m
United Airlines
Fri 5/69:30 a.m.
LHR
-
YSJ
2 stops34h 20m
United Airlines
Deal found 14/4C$ 1,140
Mon 25/512:50 p.m.
YSJ
-
LHR
2 stops19h 05m
United Airlines
Fri 29/52:10 p.m.
LHR
-
YSJ
2 stops29h 30m
United Airlines
Deal found 13/4C$ 1,145
Tue 2/612:00 p.m.
YSJ
-
LGW
3 stops30h 50m
Multiple Airlines
Tue 30/68:50 a.m.
LGW
-
YSJ
3 stops34h 55m
Multiple Airlines
Deal found 14/4C$ 1,189
Wed 27/54:30 p.m.
YSJ
-
LHR
1 stop13h 30m
Air Canada
Wed 3/69:30 a.m.
LHR
-
YSJ
1 stop10h 20m
Air Canada
Deal found 12/4C$ 1,239
Tue 2/64:30 p.m.
YSJ
-
LHR
1 stop10h 00m
Air Canada
Tue 30/69:30 a.m.
LHR
-
YSJ
1 stop10h 20m
Air Canada
Deal found 14/4C$ 1,240
Mon 11/512:00 p.m.
YSJ
-
LGW
1 stop17h 25m
Multiple Airlines
Mon 18/56:00 p.m.
LGW
-
YSJ
2 stops44h 00m
Multiple Airlines
Deal found 13/4C$ 1,293
Fri 11/910:45 a.m.
YSJ
-
LGW
2 stops25h 45m
Multiple Airlines
Sun 27/912:40 p.m.
LGW
-
YSJ
1 stop25h 20m
Multiple Airlines
Deal found 17/4C$ 1,602

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 17 April 2026.

Round-trip from

C$ 1,031

One-way from

C$ 619
Air Canada
  • Air Canada
  • 30/5-6/6
  • 4 total stops
  • 70h 22m total
  • Saint John to London
Search Deals
10/7
  • 10/7
  • 2 total stops
  • 27h 35m 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 17 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 - LGW

YSJLGW

Saint John

Wed 27/5

10:45 a.m.-6:25 p.m.

3 stops27h 40m

London Gatwick

Wed 3/6

8:50 p.m.-3:45 p.m.

2 stops22h 55m

C$ 1,108

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

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

2 stops27h 00m

C$ 1,137

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Tue 2/6

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

2 stops24h 55m

London Heathrow

Tue 30/6

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

2 stops51h 10m

C$ 1,137

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Fri 29/5

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

2 stops15h 25m

London Heathrow

Fri 5/6

9:30 a.m.-3:50 p.m.

2 stops34h 20m

C$ 1,140

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Mon 25/5

12:50 p.m.-11:55 a.m.

2 stops19h 05m

London Heathrow

Fri 29/5

2:10 p.m.-3:40 p.m.

2 stops29h 30m

C$ 1,145

Saint JohnLondon

YSJ - LGW

YSJLGW

Saint John

Tue 2/6

12:00 p.m.-10:50 p.m.

3 stops30h 50m

London Gatwick

Tue 30/6

8:50 a.m.-3:45 p.m.

3 stops34h 55m

C$ 1,189
Quickest round-trip

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Tue 2/6

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

1 stop10h 00m

London Heathrow

Tue 30/6

9:30 a.m.-3:50 p.m.

1 stop10h 20m

C$ 1,240

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Wed 27/5

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

1 stop10h 00m

London Heathrow

Wed 3/6

9:30 a.m.-11:52 p.m.

2 stops18h 22m

C$ 1,250

Saint JohnLondon

YSJ - LGW

YSJLGW

Saint John

Mon 11/5

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

1 stop17h 25m

London Gatwick

Mon 18/5

6:00 p.m.-10:00 a.m.

2 stops44h 00m

C$ 1,293
Cheapest one-way

Saint JohnLondon

YSJ - LGW

YSJLGW

Saint John

Wed 15/7

11:30 a.m.-10:50 p.m.

3 stops31h 20m

C$ 623

Flights are sorted by cheapest round-trip flights first.

Deals found on 16/4

Showing 1-10 of 27 resultsSorted by cheapest first
1
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 17 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
10,932 reviews
Check prices

Crew

7.8

Overall

7.1

Comfort

7.1

Food

6.3

Boarding

7.3

Entertainment

6.8

Reviews

1 / 20
6.0
Good

Thomas,Apr 2026

YYZ - LHR

Food is sub par. I travel a lot and AC food is not good
Air Canada
7.1
Good
10,932 reviews
Air Canada
7.1
Good
10,932 reviews
Check prices

Crew

7.8

Overall

7.1

Comfort

7.1

Food

6.3

Boarding

7.3

Entertainment

6.8

Reviews

1 / 20
6.0
Good

Thomas,Apr 2026

YYZ - LHR

Food is sub par. I travel a lot and AC food is not good

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 United Airlines fly from Saint John to London in about 24h 55m. The time it takes to get you to your destination can typically vary by up to . Saint John and London are separated by a distance of 4712 km.

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

    Currently priced at C$ 1,174, 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
Gatwick
Twickenham
Bromley
Sutton
Slough
Marlow
Cobham
Watford
Luton
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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 17 April 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 1,174AverageC$ 1,342FlexibilityNo 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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