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Cheap flights from Saint John to London from C$ 673

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 28/10. Fares are subject to change and may not be available on all flights or dates of travel.
YSJ — LON
15 Oct — 22 Oct1
1 adult
1 adult, Economy

Cheap 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 15 September 2025.

Round-trip from

C$ 1,028

One-way from

C$ 673

Popular in

December

Cheapest in

March

Average price

C$ 1,261
Air Canada
  • Air Canada
  • 24/10-29/10
  • 2 total stops
  • 39h 45m total
  • Saint John to London
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28/10
  • 28/10
  • 2 total stops
  • 18h 45m total
  • Saint John to London
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Highest demand for flights based on searches. 9% potential increase in price (C$ 185 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease (C$ 34 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from St John to London

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 15 September 2025.

Fri 24/1011:35 a.m.YSJ - LHR
1 stop14h 55mAir Canada
Wed 29/101:25 p.m.LHR - YSJ
1 stop24h 50mAir Canada
Deal found 15/9C$ 1,028
Wed 22/1011:35 a.m.YSJ - LHR
2 stops19h 05mUnited Airlines
Wed 29/104:20 p.m.LHR - YSJ
2 stops21h 55mUnited Airlines
Deal found 15/9C$ 1,050
Fri 24/1010:45 a.m.YSJ - LGW
1 stop20h 00mMultiple Airlines
Wed 29/1011:40 a.m.LGW - YSJ
2 stops31h 05mMultiple Airlines
Deal found 15/9C$ 1,094
Thu 23/105:55 a.m.YSJ - LHR
2 stops20h 25mUnited Airlines
Tue 28/107:40 a.m.LHR - YSJ
2 stops18h 49mUnited Airlines
Deal found 15/9C$ 1,118
Sat 27/95:55 a.m.YSJ - LHR
2 stops24h 15mUnited Airlines
Sat 4/1012:15 p.m.LHR - YSJ
2 stops50h 34mUnited Airlines
Deal found 15/9C$ 1,159
Sat 11/106:40 p.m.YSJ - LGW
2 stops15h 40mMultiple Airlines
Sat 18/1010:45 a.m.LGW - YSJ
2 stops17h 06mMultiple Airlines
Deal found 13/9C$ 1,276
Wed 22/1011:35 a.m.YSJ - LHR
1 stop14h 55mAir Canada
Tue 28/109:00 a.m.LHR - YSJ
2 stops29h 15mAir Canada
Deal found 15/9C$ 1,391
Wed 22/1011:35 a.m.YSJ - LHR
1 stop14h 55mAir Canada
Wed 29/101:25 p.m.LHR - YSJ
1 stop24h 50mAir Canada
Deal found 15/9C$ 1,416
Thu 23/1011:35 a.m.YSJ - LHR
1 stop18h 00mAir Canada
Tue 28/109:00 a.m.LHR - YSJ
2 stops29h 15mAir Canada
Deal found 15/9C$ 1,451
Thu 23/1011:35 a.m.YSJ - LHR
1 stop18h 00mAir Canada
Wed 29/106:50 a.m.LHR - YSJ
2 stops31h 25mAir Canada
Deal found 15/9C$ 1,456
Wed 22/1012:00 p.m.YSJ - LGW
1 stop17h 25mMultiple Airlines
Wed 29/1011:40 a.m.LGW - YSJ
2 stops31h 05mMultiple Airlines
Deal found 15/9C$ 1,841
Sat 25/1011:35 a.m.YSJ - LHR
1 stop16h 35mAir Canada
Tue 28/101:25 p.m.LHR - YSJ
1 stop24h 50mAir Canada
Deal found 15/9C$ 1,956

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 15 September 2025.
Use the filters below to find and compare flights from Saint John to London that are best for you.

Fly from

St John

Fly to

London

Route

Depart

Return

Price

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Fri 24/10

11:35 a.m.-6:30 a.m.

1 stop14h 55m

London Heathrow

Wed 29/10

1:25 p.m.-11:15 a.m.

1 stop24h 50m

C$ 1,028

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Wed 22/10

11:35 a.m.-10:40 a.m.

2 stops19h 05m

London Heathrow

Wed 29/10

4:20 p.m.-11:15 a.m.

2 stops21h 55m

C$ 1,050

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Wed 22/10

11:35 a.m.-6:45 a.m.

2 stops15h 10m

London Heathrow

Tue 28/10

9:10 a.m.-11:15 a.m.

2 stops29h 05m

C$ 1,050

Saint JohnLondon

YSJ - LGW

YSJLGW

Saint John

Fri 24/10

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

1 stop20h 00m

London Gatwick

Wed 29/10

11:40 a.m.-3:45 p.m.

2 stops31h 05m

C$ 1,094

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Fri 24/10

5:55 a.m.-6:20 a.m.

2 stops20h 25m

London Heathrow

Tue 28/10

7:40 a.m.-11:29 p.m.

2 stops18h 49m

C$ 1,118

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Thu 23/10

5:55 a.m.-6:20 a.m.

2 stops20h 25m

London Heathrow

Tue 28/10

7:40 a.m.-11:29 p.m.

2 stops18h 49m

C$ 1,118

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Thu 23/10

5:55 a.m.-6:20 a.m.

2 stops20h 25m

London Heathrow

Wed 29/10

1:35 p.m.-5:14 p.m.

2 stops30h 39m

C$ 1,118

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Sat 27/9

5:55 a.m.-10:10 a.m.

2 stops24h 15m

London Heathrow

Sat 4/10

12:15 p.m.-10:49 a.m.

2 stops50h 34m

C$ 1,159

Saint JohnLondon

YSJ - LGW

YSJLGW

Saint John

Sat 11/10

6:40 p.m.-2:20 p.m.

2 stops15h 40m

London Gatwick

Sat 18/10

10:45 a.m.-11:51 p.m.

2 stops17h 06m

C$ 1,276

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Wed 22/10

11:35 a.m.-6:30 a.m.

1 stop14h 55m

London Heathrow

Tue 28/10

9:00 a.m.-11:15 a.m.

2 stops29h 15m

C$ 1,391

Flights are sorted by cheapest round-trip flights first.

Deals found on 13/9

Showing 1-10 of 22 results
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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

What is the cheapest month to book a flight from Saint John to London?

Currently, January is the cheapest month in which you can book a flight from Saint John to London (average of C$ 560). Flying from Saint John to London in July is currently the most expensive (average of C$ 856). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost to fly round-trip from Saint John to London?

What’s the top layover airport for flights from Saint John to London?

Share of one-stop round-trip flights from Saint John to London chosen by Cheapflights users in the past 12 months, using the same layover each way.

Toronto (YYZ) – chosen by Cheapflights users on 71% of one-stop itineraries from Saint John to London on Cheapflights.

What’s the cheapest layover airport for flights from Saint John to London?

Average round-trip fare for 1-stop flights from Saint John to London, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Montreal (YUL) is the most affordable 1-stop option, with an average round-trip price of C$ 1,205.

What’s the fastest layover option from Saint John to London?

Shortest average travel time for 1-stop one-way flights from Saint John to London, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Montreal (YUL) have the shortest average one-way travel time for 1-stop routes: 10h 15m.

Which airport typically offers the quickest layover for flights from Saint John to London?

Average layover duration for 1-stop one-way flights from Saint John to London, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Montreal (YUL) offer the fastest connection on this route, with an average layover time of 1h 57m.

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 15 September 2025.
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
10,000 reviews
Check prices

Crew

7.8

Boarding

7.3

Entertainment

6.8

Food

6.3

Comfort

7.1

Overall

7.1

Reviews

1 / 20
8.0
Excellent

Graeme,Sep 2025

YWG - YVR

Why not start boarding from the higher seat numbers? Easier movement for everyone. Easier to put baggage in over head lockers. Unable to get a coffee due to air turbulence, but not offered the chance to have a coffee once it had ceased.
Air Canada
7.1
Good
10,000 reviews
Air Canada
7.1
Good
10,000 reviews
Check prices

Crew

7.8

Boarding

7.3

Entertainment

6.8

Food

6.3

Comfort

7.1

Overall

7.1

Reviews

1 / 20
8.0
Excellent

Graeme,Sep 2025

YWG - YVR

Why not start boarding from the higher seat numbers? Easier movement for everyone. Easier to put baggage in over head lockers. Unable to get a coffee due to air turbulence, but not offered the chance to have a coffee once it had ceased.

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 14h 55m. The time it takes to get you to your destination can typically vary by up to 4h 10m. 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$ 1,153, 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. You may be able to fly from Saint John to London for 6% less than the average price by searching for this airline.

  • 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.

  • What is the cheapest month to book a flight from Saint John to London?

    Currently, January is the cheapest month in which you can book a flight from Saint John to London (average of C$ 560). Flying from Saint John to London in July is currently the most expensive (average of C$ 856). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Brentford
Sutton
Hounslow
Slough
Marlow
Milton Keynes
Romford
Watford
Bedford
Luton
Southall

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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 15 September 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 1,153AverageC$ 1,202FlexibilityNo 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.

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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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