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Cheap flights from Saint John to London from C$ 754

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 16/9. Fares are subject to change and may not be available on all flights or dates of travel.
YSJ — LON
5 Sep — 12 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 6 August 2026.

Wed 4/1111:05 a.m. -
2 stops19h 45m
Wed 11/1112:05 p.m. -
2 stops26h 20m
Deal found 4/8C$ 1,153
Fri 2/1012:50 p.m. -
2 stops16h 10m
Sat 10/1012:00 p.m. -
2 stops31h 59m
Deal found 5/8C$ 1,159
Thu 24/912:50 p.m. -
2 stops19h 05m
Mon 28/94:40 p.m. -
2 stops27h 19m
Deal found 5/8C$ 1,160
Fri 2/1010:45 a.m. -
2 stops15h 45m
Sat 10/105:40 p.m. -
3 stops26h 19m
Deal found 2/8C$ 1,205
Wed 4/1111:05 a.m. -
1 stop16h 05m
Wed 11/119:00 a.m. -
2 stops18h 24m
Deal found 4/8C$ 1,306
Fri 2/104:40 p.m. -
1 stop13h 20m
Sat 10/106:00 a.m. -
2 stops37h 59m
Deal found 2/8C$ 1,317
Wed 16/912:50 p.m. -
1 stop13h 45m
Wed 23/99:30 a.m. -
1 stop10h 29m
Deal found 2/8C$ 1,329
Wed 16/96:55 a.m. -
3 stops31h 20m
Wed 23/99:45 a.m. -
2 stops18h 06m
Deal found 2/8C$ 1,465
Tue 4/812:50 p.m. -
2 stops17h 00m
Thu 20/87:40 a.m. -
2 stops21h 45m
Deal found 2/8C$ 1,629
Wed 4/115:15 a.m. -
2 stops31h 15m
Wed 11/115:25 p.m. -
2 stops45h 00m
Deal found 4/8C$ 2,041
Fri 7/812:50 p.m. -
2 stops41h 05m
Wed 12/87:25 a.m. -
2 stops32h 25m
Deal found 4/8C$ 3,740

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 6 August 2026.

Round-trip from

C$ 1,153

One-way from

C$ 754
United Airlines
  • United Airlines
  • 4/11-11/11
  • 4 total stops
  • 46h 05m total
  • Saint John to London
Search Deals
16/9
  • 16/9
  • 3 total stops
  • 35h 55m 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 6 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

Wed 4/11

11:05 a.m.-10:50 a.m.

2 stops19h 45m

London Heathrow

Wed 11/11

12:05 p.m.-10:25 a.m.

2 stops26h 20m

C$ 1,153

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$ 1,159

Saint JohnLondon

YSJ Saint John - LHR London Heathrow

YSJLHR

Saint John

Wed 16/9

5:00 a.m.-5:55 a.m.

2 stops20h 55m

London Heathrow

Wed 23/9

4:00 p.m.-3:59 p.m.

2 stops27h 59m

C$ 1,161

Saint JohnLondon

YSJ Saint John - LHR London Heathrow

YSJLHR

Saint John

Fri 2/10

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

1 stop13h 20m

London Heathrow

Sat 10/10

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

2 stops37h 59m

C$ 1,317
Quickest round-trip

Saint JohnLondon

YSJ Saint John - LHR London Heathrow

YSJLHR

Saint John

Wed 4/11

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

1 stop16h 05m

London Heathrow

Wed 11/11

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

1 stop25h 25m

C$ 1,323

Saint JohnLondon

YSJ Saint John - LGW London Gatwick

YSJLGW

Saint John

Wed 16/9

6:55 a.m.-6:15 p.m.

3 stops31h 20m

London Gatwick

Wed 23/9

9:45 a.m.-11:51 p.m.

2 stops18h 06m

C$ 1,465

Saint JohnLondon

YSJ Saint John - LGW London Gatwick

YSJLGW

Saint John

Wed 4/11

5:15 a.m.-4:30 p.m.

2 stops31h 15m

London Gatwick

Wed 11/11

5:25 p.m.-10:25 a.m.

2 stops45h 00m

C$ 2,041
Cheapest one-way

Saint JohnLondon

YSJ Saint John - LGW London Gatwick

YSJLGW

Saint John

Wed 16/9

6:55 a.m.-10:50 p.m.

3 stops35h 55m

C$ 754

Saint JohnLondon

YSJ Saint John - LGW London Gatwick

YSJLGW

Saint John

Mon 17/8

10:45 a.m.-8:25 p.m.

3 stops29h 40m

C$ 820

Saint JohnLondon

YSJ Saint John - LHR London Heathrow

YSJLHR

Saint John

Wed 16/9

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

2 stops19h 05m

C$ 840

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/8

Showing 1-10 of 14 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 6 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
11,431 reviews
Check prices

Entertainment

6.8

Comfort

7.1

Boarding

7.3

Crew

7.8

Food

6.3

Overall

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
11,431 reviews
Air Canada
7.1
Good
11,431 reviews
Check prices

Entertainment

6.8

Comfort

7.1

Boarding

7.3

Crew

7.8

Food

6.3

Overall

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 19h 45m. 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 6 August 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 1,290AverageC$ 1,471FlexibilityNo 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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