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Cheap flights from London Heathrow Airport to Saint John from £492

LHR — YSJ
24 Nov — 1 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Heathrow to St John

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to St John

Sun 8/1106:00 -
2 stops32h 19m
Sun 15/1117:35 -
2 stops32h 55m
Deal found 23/10£587
Mon 7/1209:00 -
2 stops29h 25m
Mon 14/1205:20 -
2 stops21h 10m
Deal found 23/10£598
Sun 22/1106:00 -
2 stops32h 19m
Sun 29/1117:35 -
2 stops23h 25m
Deal found 25/10£601
Mon 16/1109:00 -
2 stops29h 19m
Sun 22/1117:35 -
2 stops23h 25m
Deal found 21/10£602
Fri 6/1106:50 -
2 stops31h 29m
Sun 8/1105:20 -
2 stops35h 40m
Deal found 21/10£612
Sat 5/1209:00 -
2 stops29h 25m
Sat 12/1205:20 -
2 stops21h 50m
Deal found 21/10£614
Thu 5/1106:00 -
2 stops21h 28m
Sun 8/1117:35 -
2 stops23h 25m
Deal found 20/10£619
Sat 21/1106:00 -
2 stops21h 28m
Sat 28/1105:20 -
2 stops21h 50m
Deal found 24/10£620
Wed 9/1209:00 -
2 stops29h 25m
Wed 16/1205:20 -
2 stops21h 50m
Deal found 25/10£631

Find flight deals from Heathrow to St John

Round-trip from

£587

One-way from

£492

Popular in

December

Cheapest in

February

Average price

£521
Air Canada
  • Air Canada
  • 8/11-15/11
  • 4 total stops
  • 65h 14m total
  • London to Saint John
Search Deals
Air Canada
  • Air Canada
  • 16/11-31/12
  • 2 total stops
  • 21h 26m total
  • London to Saint John
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£78 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£15 potential savings vs. average return price).
Search Deals
Average for round-trip flights in October 2026
Search Deals

Cheapflights Fare Finder

 
Use the filters below to find and compare flights from London Heathrow Airport to Saint John that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonSaint John

LHR London Heathrow - YSJ Saint John

LHRYSJ

London Heathrow

Tue 17/11

11:10-10:19

3 stops27h 09m

Saint John

Wed 31/12

00:00-05:00

Nonstop0h 00m

£542

LondonSaint John

LHR London Heathrow - YSJ Saint John

LHRYSJ

London Heathrow

Mon 7/12

09:00-10:25

2 stops29h 25m

Saint John

Mon 14/12

05:20-06:30

2 stops21h 10m

£598

LondonSaint John

LHR London Heathrow - YSJ Saint John

LHRYSJ

London Heathrow

Tue 3/11

15:00-10:19

2 stops23h 19m

Saint John

Wed 31/12

00:00-05:00

Nonstop0h 00m

£612

LondonSaint John

LHR London Heathrow - YSJ Saint John

LHRYSJ

London Heathrow

Fri 6/11

06:50-10:19

2 stops31h 29m

Saint John

Sun 8/11

05:20-21:00

2 stops35h 40m

£612

LondonSaint John

LHR London Heathrow - YSJ Saint John

LHRYSJ

London Heathrow

Sat 5/12

09:00-10:25

2 stops29h 25m

Saint John

Sat 12/12

05:20-07:10

2 stops21h 50m

£614

LondonSaint John

LHR London Heathrow - YSJ Saint John

LHRYSJ

London Heathrow

Thu 5/11

06:00-23:28

2 stops21h 28m

Saint John

Sun 8/11

17:35-21:00

2 stops23h 25m

£619

LondonSaint John

LHR London Heathrow - YSJ Saint John

LHRYSJ

London Heathrow

Wed 9/12

09:00-10:25

2 stops29h 25m

Saint John

Wed 16/12

05:20-07:10

2 stops21h 50m

£631

LondonSaint John

LHR London Heathrow - YSJ Saint John

LHRYSJ

London Heathrow

Sat 31/10

09:00-11:25

3 stops29h 25m

Saint John

Wed 31/12

00:00-05:00

Nonstop0h 00m

£636

LondonSaint John

LHR London Heathrow - YSJ Saint John

LHRYSJ

London Heathrow

Sat 5/12

11:10-23:58

2 stops40h 48m

Saint John

Sat 12/12

11:05-07:10

1 stop16h 05m

£642

LondonSaint John

LHR London Heathrow - YSJ Saint John

LHRYSJ

London Heathrow

Sun 22/11

18:00-16:54

1 stop26h 54m

Saint John

Sun 29/11

05:20-06:30

1 stop21h 10m

£714

Flights are sorted by cheapest return flights first.

Deals found on 22/10

Showing 1-10 of 14 resultsSorted by cheapest first
1
2

Best time to book a flight from Heathrow to St John

Have a flexible travel schedule? Discover the best time to fly to St John from Heathrow with our price prediction graph.
Estimated return price

Cheapflights Insights

Everything you need to know about your flight from London Heathrow Airport to Saint John

What’s the top stopover airport for flights from London Heathrow Airport to Saint John?

Toronto (YYZ) – chosen by Cheapflights users on 80% of one-stop itineraries from London Heathrow Airport to Saint John on Cheapflights.

What’s the cheapest stopover airport for flights from London Heathrow Airport to Saint John?

Montreal (YUL) is the most affordable one-stop option, with an average return flight price of £495.

What’s the fastest stopover option from London Heathrow Airport to Saint John?

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

Which airport typically offers the quickest stopover for flights from London Heathrow Airport to Saint John?

Flights via Montreal (YUL) offer the fastest connection on this route, with an average stopover time of 1h 33m.

Reviews of airlines servicing St John

Read reviews from past customers who have flown with Air Canada from London Heathrow Airport to Saint John. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air Canada
7.1
Good
11,810 reviews
Check prices

Food

6.3

Entertainment

6.8

Crew

7.8

Overall

7.1

Boarding

7.3

Comfort

7.1

Reviews

1 / 20
6.0
Good

Anonymous,Oct 2026

FRA - YUL

Every time I have traveled with Lufthansa, during the descent, I experience significant pain in my ears, head, and chest—as if the decompression is happening too quickly.
Air Canada
7.1
Good
11,810 reviews
Air Canada
7.1
Good
11,810 reviews
Check prices

Food

6.3

Entertainment

6.8

Crew

7.8

Overall

7.1

Boarding

7.3

Comfort

7.1

Reviews

1 / 20
6.0
Good

Anonymous,Oct 2026

FRA - YUL

Every time I have traveled with Lufthansa, during the descent, I experience significant pain in my ears, head, and chest—as if the decompression is happening too quickly.

Related info for your journey

  • What airport do you fly into for flights to Saint John from London Heathrow?

    Saint John (YSJ), located 9.4 mi from the city center, is the airport you fly into when you book flights from London Heathrow to Saint John. 1 airline have flights to Saint John from London Heathrow on a regular basis. Booking flights from London Heathrow to Saint John should not be difficult; the airport handles an average of 0 inbound flights from London Heathrow per day.

  • How long is the flight from London Heathrow Airport to Saint John?

    A quick flight from London Heathrow Airport to Saint John can take about 31h 29m. Air Canada provides one of the quickest options available for as low as £612. The distance from London Heathrow Airport to Saint John is about 2928 mi.

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

    Cheapflights users have booked flights from London Heathrow Airport to Saint John round-trip from £476.

  • Can I find deals for flights from Heathrow to St John that include hotel bookings?

    Yes. In addition to deals on Heathrow to St John flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Heathrow to St John?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to St John.

  • Can I find deals for business class flights from Heathrow to St John?

    Yes. Cheapflights offers flight deals from Heathrow to St John 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

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Heathrow to St John

Heathrow to Moncton flights
London City to Moncton flights
Gatwick to Moncton flights

Top airline flying from Heathrow to St John

AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest£476Average£722FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

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Why should you use Cheapflights to find cheap flight tickets from Heathrow to St John?

Cheapflights helps you find that perfect flight to St John from Heathrow by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Heathrow to St John with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Heathrow to St John, users can toggle the no change fees filter when performing a flight search.

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