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Cheap flights from London Heathrow Airport to Saint John from £446

LHR — YSJ
10 Oct — 17 Oct1
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

Thu 15/1008:45 -
2 stops19h 06m
Thu 29/1011:05 -
2 stops19h 15m
Deal found 7/9£446
Sat 24/1009:30 -
1 stop10h 29m
Sat 31/1018:00 -
2 stops48h 00m
Deal found 9/9£483
Thu 15/1014:10 -
1 stop13h 41m
Wed 28/1005:15 -
1 stop22h 15m
Deal found 10/9£490
Sat 3/1009:30 -
1 stop10h 29m
Tue 27/1011:05 -
1 stop17h 05m
Deal found 5/9£497
Sat 3/1009:30 -
2 stops18h 21m
Wed 28/1005:15 -
2 stops22h 55m
Deal found 5/9£510

Find flight deals from Heathrow to St John

Round-trip from

£446

Popular in

December

Cheapest in

February

Average price

£727
Air Canada
  • Air Canada
  • 15/10-29/10
  • 4 total stops
  • 38h 21m total
  • London to Saint John
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Highest demand for flights based on searches. 9% potential increase in price (£55 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease (£15 potential savings vs. average return price).
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Average for round-trip flights in September 2026
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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
Fastest return journey

LondonSaint John

LHR London Heathrow - YSJ Saint John

LHRYSJ

London Heathrow

Sat 3/10

09:30-15:59

1 stop10h 29m

Saint John

Tue 27/10

11:05-07:10

1 stop17h 05m

£497

LondonSaint John

LHR London Heathrow - YSJ Saint John

LHRYSJ

London Heathrow

Sat 3/10

09:30-23:51

2 stops18h 21m

Saint John

Wed 28/10

11:05-07:10

1 stop17h 05m

£504

LondonSaint John

LHR London Heathrow - YSJ Saint John

LHRYSJ

London Heathrow

Thu 15/10

06:00-23:51

2 stops21h 51m

Saint John

Mon 19/10

16:40-10:00

1 stop13h 20m

£540

Flights are sorted by cheapest return flights first.

Deals found on 5/9

Sorted by cheapest first

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 86% 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 £489.

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
11,608 reviews
Check prices

Crew

7.8

Overall

7.1

Food

6.3

Boarding

7.3

Comfort

7.1

Entertainment

6.8

Reviews

1 / 20
2.0
Mediocre

Sylvia,Aug 2026

YLW - YYZ

The fires impacted our trip. We sat in the plane for an hour with no air conditioning. We were a total of 5-hour delay but missed our connection. The staff tried to keep us aware of important information
Air Canada
7.1
Good
11,608 reviews
Air Canada
7.1
Good
11,608 reviews
Check prices

Crew

7.8

Overall

7.1

Food

6.3

Boarding

7.3

Comfort

7.1

Entertainment

6.8

Reviews

1 / 20
2.0
Mediocre

Sylvia,Aug 2026

YLW - YYZ

The fires impacted our trip. We sat in the plane for an hour with no air conditioning. We were a total of 5-hour delay but missed our connection. The staff tried to keep us aware of important information

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 10h 29m. Air Canada provides one of the quickest options available for as low as £498. 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 £470.

  • 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
Gatwick to Moncton flights
London City to Moncton flights

Top airline flying from Heathrow to St John

AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest£470Average£715FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

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

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Heathrow to St John. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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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Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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