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Cheap flights from Saint John to London from C$ 598

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 6/5. Fares are subject to change and may not be available on all flights or dates of travel.
YSJ — LON
26 Apr — 3 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 27 March 2026.

Thu 16/411:55 a.m.
YSJ
-
LHR
2 stops18h 45m
United Airlines
Thu 23/47:45 a.m.
LHR
-
YSJ
2 stops31h 30m
United Airlines
Deal found 25/3C$ 1,147
Tue 21/411:55 a.m.
YSJ
-
LHR
2 stops29h 30m
United Airlines
Tue 28/410:25 a.m.
LHR
-
YSJ
2 stops28h 50m
United Airlines
Deal found 24/3C$ 1,153
Tue 14/45:35 a.m.
YSJ
-
LHR
2 stops22h 45m
United Airlines
Fri 24/44:40 p.m.
LHR
-
YSJ
2 stops22h 30m
United Airlines
Deal found 25/3C$ 1,154
Fri 24/45:35 a.m.
YSJ
-
LHR
2 stops25h 05m
United Airlines
Tue 28/49:30 a.m.
LHR
-
YSJ
2 stops29h 45m
United Airlines
Deal found 25/3C$ 1,157
Fri 24/45:35 a.m.
YSJ
-
LHR
2 stops21h 10m
United Airlines
Fri 1/511:05 a.m.
LHR
-
YSJ
2 stops16h 47m
United Airlines
Deal found 25/3C$ 1,164
Tue 21/411:55 a.m.
YSJ
-
LHR
1 stop18h 05m
Air Canada
Tue 28/48:45 a.m.
LHR
-
YSJ
2 stops30h 30m
Air Canada
Deal found 24/3C$ 1,327
Fri 24/45:35 a.m.
YSJ
-
LHR
2 stops21h 40m
Multiple Airlines
Fri 1/59:30 a.m.
LHR
-
YSJ
1 stop10h 10m
Multiple Airlines
Deal found 25/3C$ 1,343
Mon 18/54:30 p.m.
YSJ
-
LHR
1 stop13h 30m
Air Canada
Wed 27/58:40 a.m.
LHR
-
YSJ
2 stops35h 00m
Air Canada
Deal found 22/3C$ 1,350
Fri 8/510:45 a.m.
YSJ
-
LGW
2 stops27h 25m
Multiple Airlines
Fri 15/58:55 a.m.
LGW
-
YSJ
2 stops18h 57m
Multiple Airlines
Deal found 24/3C$ 1,353
Fri 21/84:30 p.m.
YSJ
-
LHR
2 stops24h 30m
Air Canada
Sun 30/86:00 a.m.
LHR
-
YSJ
2 stops23h 25m
Air Canada
Deal found 22/3C$ 1,389
Fri 17/410:45 a.m.
YSJ
-
LHR
2 stops15h 45m
Multiple Airlines
Wed 22/45:40 p.m.
LHR
-
YSJ
3 stops21h 30m
Multiple Airlines
Deal found 25/3C$ 1,392
Fri 17/410:45 a.m.
YSJ
-
LGW
2 stops23h 40m
Multiple Airlines
Thu 23/412:40 p.m.
LGW
-
YSJ
1 stop25h 20m
Multiple Airlines
Deal found 25/3C$ 1,399

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 27 March 2026.

Round-trip from

C$ 1,147

One-way from

C$ 598

Popular in

December

Cheapest in

March

Average price

C$ 1,086
United Airlines
  • United Airlines
  • 16/4-23/4
  • 4 total stops
  • 50h 15m total
  • Saint John to London
Search Deals
6/5
  • 6/5
  • 2 total stops
  • 28h 40m total
  • Saint John to London
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (C$ 73 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 39 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
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 27 March 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

Thu 16/4

11:55 a.m.-10:40 a.m.

2 stops18h 45m

London Heathrow

Wed 22/4

9:30 a.m.-11:10 a.m.

2 stops29h 40m

C$ 1,147

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Thu 16/4

11:55 a.m.-10:40 a.m.

2 stops18h 45m

London Heathrow

Tue 21/4

7:45 a.m.-11:15 a.m.

2 stops31h 30m

C$ 1,147

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Mon 18/5

4:30 p.m.-10:40 a.m.

2 stops14h 10m

London Heathrow

Wed 27/5

3:20 p.m.-3:40 p.m.

2 stops28h 20m

C$ 1,153

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Sun 10/5

4:30 p.m.-10:40 a.m.

2 stops14h 10m

London Heathrow

Thu 14/5

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

2 stops27h 00m

C$ 1,153

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Fri 8/5

4:30 p.m.-7:15 a.m.

2 stops34h 45m

London Heathrow

Fri 15/5

12:15 p.m.-3:40 p.m.

2 stops31h 25m

C$ 1,153

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Tue 21/4

11:55 a.m.-9:25 p.m.

2 stops29h 30m

London Heathrow

Tue 28/4

10:25 a.m.-11:15 a.m.

2 stops28h 50m

C$ 1,153

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Mon 20/4

5:35 a.m.-9:20 a.m.

2 stops23h 45m

London Heathrow

Fri 24/4

4:40 p.m.-11:10 a.m.

2 stops22h 30m

C$ 1,154

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Sun 19/4

5:35 a.m.-9:00 a.m.

2 stops23h 25m

London Heathrow

Thu 23/4

4:40 p.m.-11:15 a.m.

2 stops22h 35m

C$ 1,154

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Tue 14/4

5:35 a.m.-8:20 a.m.

2 stops22h 45m

London Heathrow

Fri 24/4

4:40 p.m.-11:10 a.m.

2 stops22h 30m

C$ 1,154

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Wed 15/4

5:35 a.m.-5:55 a.m.

2 stops20h 20m

London Heathrow

Sun 19/4

9:30 a.m.-11:15 a.m.

2 stops29h 45m

C$ 1,154

Flights are sorted by cheapest round-trip flights first.

Deals found on 22/3

Showing 1-10 of 29 resultsSorted by cheapest first
1
2
3

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, October is the cheapest month in which you can book a flight from Saint John to London (average of C$ 955). Flying from Saint John to London in January is currently the most expensive (average of C$ 1,345). 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.

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 92% 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.

Toronto (YYZ) is the most affordable 1-stop option, with an average round-trip price of C$ 1,264.

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 00m.

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 52m.

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 27 March 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
10,848 reviews
Check prices

Crew

7.8

Entertainment

6.8

Comfort

7.1

Food

6.3

Overall

7.1

Boarding

7.3

Reviews

1 / 20
6.0
Good

Paula,Mar 2026

YVR - PSP

Everything was OK, but we waited on the tarmac for an hour and 20 minutes after landing because there was no available gate. This is a daily occurrence at the Palm Springs airport, and happens with Air Canada and WestJet constantly.
Air Canada
7.1
Good
10,848 reviews
Air Canada
7.1
Good
10,848 reviews
Check prices

Crew

7.8

Entertainment

6.8

Comfort

7.1

Food

6.3

Overall

7.1

Boarding

7.3

Reviews

1 / 20
6.0
Good

Paula,Mar 2026

YVR - PSP

Everything was OK, but we waited on the tarmac for an hour and 20 minutes after landing because there was no available gate. This is a daily occurrence at the Palm Springs airport, and happens with Air Canada and WestJet constantly.

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 18h 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.

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

    Currently priced at C$ 1,170, 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 5% 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, October is the cheapest month in which you can book a flight from Saint John to London (average of C$ 955). Flying from Saint John to London in January is currently the most expensive (average of C$ 1,345). 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
Gatwick
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Bromley
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Slough
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Bedford
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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 27 March 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 1,170AverageC$ 1,310FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from St John to London?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to London from St John today with Cheapflights!

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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