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Cheap flights from Saint John to London from C$ 447

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 9/9. Fares are subject to change and may not be available on all flights or dates of travel.
YSJ — LON
11 Sep — 18 Sep1
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 12 August 2026.

Sun 22/1111:05 a.m. -
2 stops16h 50m
Fri 27/1112:00 p.m. -
2 stops26h 25m
Deal found 8/8C$ 1,149
Fri 25/94:40 p.m. -
2 stops15h 15m
Fri 2/106:00 p.m. -
2 stops25h 59m
Deal found 11/8C$ 1,151
Thu 24/94:40 p.m. -
2 stops24h 45m
Mon 28/912:00 p.m. -
2 stops31h 59m
Deal found 11/8C$ 1,152
Fri 2/105:40 a.m. -
2 stops24h 45m
Sat 10/104:00 p.m. -
2 stops27h 59m
Deal found 8/8C$ 1,155
Wed 19/810:45 a.m. -
2 stops40h 55m
Tue 1/912:40 p.m. -
1 stop25h 20m
Deal found 11/8C$ 1,183
Wed 19/810:45 a.m. -
2 stops40h 55m
Thu 3/99:40 a.m. -
1 stop28h 20m
Deal found 11/8C$ 1,188
Sun 22/1111:05 a.m. -
1 stop16h 05m
Fri 27/119:00 a.m. -
2 stops18h 24m
Deal found 8/8C$ 1,311
Fri 2/104:40 p.m. -
1 stop9h 50m
Sat 10/106:00 a.m. -
2 stops33h 56m
Deal found 8/8C$ 1,313
Fri 14/810:45 a.m. -
2 stops39h 35m
Tue 1/912:40 p.m. -
1 stop25h 20m
Deal found 11/8C$ 1,471
Fri 14/810:45 a.m. -
2 stops39h 35m
Thu 3/99:40 a.m. -
1 stop28h 20m
Deal found 11/8C$ 1,476
Mon 17/810:45 a.m. -
2 stops20h 45m
Tue 1/912:40 p.m. -
1 stop25h 20m
Deal found 11/8C$ 1,589
Mon 17/810:45 a.m. -
2 stops20h 45m
Thu 3/99:40 a.m. -
1 stop28h 20m
Deal found 11/8C$ 1,596

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 12 August 2026.

Round-trip from

C$ 1,149

One-way from

C$ 447
United Airlines
  • United Airlines
  • 22/11-27/11
  • 4 total stops
  • 43h 15m total
  • Saint John to London
Search Deals
9/9
  • 9/9
  • 2 total stops
  • 27h 05m 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 12 August 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 Saint John - LHR London Heathrow

YSJLHR

Saint John

Sun 22/11

11:05 a.m.-7:55 a.m.

2 stops16h 50m

London Heathrow

Fri 27/11

12:00 p.m.-10:25 a.m.

2 stops26h 25m

C$ 1,149
Quickest round-trip

Saint JohnLondon

YSJ Saint John - LHR London Heathrow

YSJLHR

Saint John

Fri 25/9

4:40 p.m.-11:55 a.m.

2 stops15h 15m

London Heathrow

Fri 2/10

6:00 p.m.-3:59 p.m.

2 stops25h 59m

C$ 1,151

Saint JohnLondon

YSJ Saint John - LHR London Heathrow

YSJLHR

Saint John

Thu 24/9

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

2 stops24h 45m

London Heathrow

Mon 28/9

12:00 p.m.-3:59 p.m.

2 stops31h 59m

C$ 1,152

Saint JohnLondon

YSJ Saint John - LHR London Heathrow

YSJLHR

Saint John

Fri 2/10

12:50 p.m.-9:00 a.m.

2 stops16h 10m

London Heathrow

Sat 10/10

12:00 p.m.-3:59 p.m.

2 stops31h 59m

C$ 1,157

Saint JohnLondon

YSJ Saint John - LHR London Heathrow

YSJLHR

Saint John

Fri 2/10

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

1 stop9h 50m

London Heathrow

Sat 10/10

6:00 a.m.-11:56 a.m.

2 stops33h 56m

C$ 1,313

Saint JohnLondon

YSJ Saint John - LHR London Heathrow

YSJLHR

Saint John

Sun 22/11

11:05 a.m.-7:10 a.m.

1 stop16h 05m

London Heathrow

Fri 27/11

1:00 p.m.-10:25 a.m.

1 stop25h 25m

C$ 1,329
Cheapest one-way

Saint JohnLondon

YSJ Saint John - LHR London Heathrow

YSJLHR

Saint John

Wed 9/9

10:45 a.m.-5:20 p.m.

2 stops26h 35m

C$ 547

Saint JohnLondon

YSJ Saint John - LGW London Gatwick

YSJLGW

Saint John

Wed 19/8

10:45 a.m.-7:40 a.m.

2 stops40h 55m

C$ 602

Saint JohnLondon

YSJ Saint John - LHR London Heathrow

YSJLHR

Saint John

Wed 19/8

10:45 a.m.-7:25 a.m.

3 stops40h 40m

C$ 663

Saint JohnLondon

YSJ Saint John - LGW London Gatwick

YSJLGW

Saint John

Wed 9/9

10:45 a.m.-8:30 p.m.

3 stops29h 45m

C$ 677

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/8

Showing 1-10 of 20 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 12 August 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
11,464 reviews
Check prices

Entertainment

6.8

Boarding

7.3

Crew

7.8

Food

6.3

Overall

7.1

Comfort

7.1

Reviews

1 / 20
8.0
Excellent

Tanis,Jul 2026

YVR - YXC

I needed assistance due to a knee injury and the staff at Air Canada from the checkin right to boarding the plane was incredible! Then on the plane although it was almost full they made it so I DID NOT have anyone seated next to me so I could put my legs up onto the edge of the seat which made things so much easier to travel the hour & a half flight! Very impressed!
Air Canada
7.1
Good
11,464 reviews
Air Canada
7.1
Good
11,464 reviews
Check prices

Entertainment

6.8

Boarding

7.3

Crew

7.8

Food

6.3

Overall

7.1

Comfort

7.1

Reviews

1 / 20
8.0
Excellent

Tanis,Jul 2026

YVR - YXC

I needed assistance due to a knee injury and the staff at Air Canada from the checkin right to boarding the plane was incredible! Then on the plane although it was almost full they made it so I DID NOT have anyone seated next to me so I could put my legs up onto the edge of the seat which made things so much easier to travel the hour & a half flight! Very impressed!

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 16h 50m. 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.

  • 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?

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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 12 August 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 1,279AverageC$ 1,459FlexibilityNo 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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