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Cheap flights from London Heathrow Airport to Saint John from C$ 973

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 26/11. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — YSJ
11 Oct — 18 Oct1
1 adult
1 adult, Economy

Cheap flight deals from Heathrow to St John

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to St John (YSJ). 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 11 September 2025.

Round-trip from

C$ 973

Popular in

November

Cheapest in

April

Average price

C$ 1,053
Air Canada
  • Air Canada
  • 26/11-30/11
  • 4 total stops
  • 40h 44m total
  • London to Saint John
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Highest demand for flights based on searches. 8% potential increase in price (C$ 141 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease (C$ 49 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 Heathrow to St John

Cheapest flights from Heathrow to St John
Explore the most affordable flight options available from Heathrow to St John. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 September 2025.

Wed 26/119:00 a.m.LHR - YSJ
2 stops18h 24mAir Canada
Sun 30/116:15 p.m.YSJ - LHR
2 stops22h 20mAir Canada
Deal found 10/9C$ 973
Thu 9/106:50 a.m.LHR - YSJ
2 stops14h 50mAir Canada
Mon 13/105:55 a.m.YSJ - LHR
2 stops23h 40mAir Canada
Deal found 11/9C$ 980
Fri 10/106:50 a.m.LHR - YSJ
2 stops31h 59mAir Canada
Mon 13/105:55 a.m.YSJ - LHR
2 stops23h 40mAir Canada
Deal found 11/9C$ 1,020
Thu 9/109:30 a.m.LHR - YSJ
2 stops18h 21mMultiple Airlines
Mon 13/106:40 p.m.YSJ - LHR
1 stop11h 20mMultiple Airlines
Deal found 11/9C$ 1,038
Fri 10/104:00 p.m.LHR - YSJ
1 stop11h 51mMultiple Airlines
Mon 13/1010:45 a.m.YSJ - LHR
1 stop19h 15mMultiple Airlines
Deal found 11/9C$ 1,070

Cheapflights Fare Finder

 
Customize your flight search to find flights from Heathrow to St John 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 11 September 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Saint John that are best for you.

Fly from

Heathrow

Fly to

St John

Route

Depart

Return

Price

LondonSaint John

LHR - YSJ

LHRYSJ

London Heathrow

Wed 26/11

9:00 a.m.-11:24 p.m.

2 stops18h 24m

Saint John

Sun 30/11

6:15 p.m.-8:35 p.m.

2 stops22h 20m

C$ 973

LondonSaint John

LHR - YSJ

LHRYSJ

London Heathrow

Thu 9/10

6:50 a.m.-5:40 p.m.

2 stops14h 50m

Saint John

Mon 13/10

5:55 a.m.-9:35 a.m.

2 stops23h 40m

C$ 980

LondonSaint John

LHR - YSJ

LHRYSJ

London Heathrow

Fri 10/10

6:50 a.m.-10:49 a.m.

2 stops31h 59m

Saint John

Mon 13/10

5:55 a.m.-9:35 a.m.

2 stops23h 40m

C$ 1,020

LondonSaint John

LHR - YSJ

LHRYSJ

London Heathrow

Thu 9/10

9:30 a.m.-11:51 p.m.

2 stops18h 21m

Saint John

Mon 13/10

6:40 p.m.-10:00 a.m.

1 stop11h 20m

C$ 1,038

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/9

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 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 London Heathrow Airport to Saint John

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

Currently, May is the cheapest month in which you can book a flight from London Heathrow Airport to Saint John (average of C$ 213). Flying from London Heathrow Airport to Saint John in December is currently the most expensive (average of C$ 461). 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.

Related info for your journey

Find useful and relevant information for your journey from Heathrow to St John. 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 into for flights to Saint John from London Heathrow?

    For a flight from London Heathrow to Saint John, you will be flying into Saint John. Saint John (YSJ) is just 15.1 km from the centre of the city. Saint John is the only Saint John airport and it handles 0 inbound flights from London Heathrow per day. 0 airlines have flights to Saint John from London Heathrow on a regular basis.

  • 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 18h 24m. Air Canada provides one of the quickest options available for as low as C$ 973. The distance between London Heathrow Airport and Saint John is about 4712 km.

  • 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 vacation 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.

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

    Currently, May is the cheapest month in which you can book a flight from London Heathrow Airport to Saint John (average of C$ 213). Flying from London Heathrow Airport to Saint John in December is currently the most expensive (average of C$ 461). 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

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Complete your trip

Complete your trip to St John by adding a car rental and/or hotel reservation to your travel itinerary.
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Fly with Cheapflights

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

Deals for Heathrow to St John flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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

Cheapflights simply makes it quick and affordable to book flights from Heathrow to St John 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 Heathrow to St John with no change fees?

Need flexible booking options for your flight to St John from Heathrow? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Heathrow to St John become cheaper?

Yes, Cheapflights offers price alerts on Heathrow to St John flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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