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Cheap flights from London Heathrow Airport to Saint John from C$ 713

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 11/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — YSJ
3 Aug — 10 Aug1
1 adult

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 29 July 2025.

Round-trip from

C$ 958

One-way from

C$ 713

Popular in

November

Cheapest in

April

Average price

C$ 1,107
Air Canada
  • Air Canada
  • 11/9-18/9
  • 3 total stops
  • 52h 54m total
  • London to Saint John
Search Deals
11/9
  • 11/9
  • 2 total stops
  • 13h 25m total
  • London to Saint John
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (C$ 92 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 45 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 29 July 2025.

Thu 11/96:50 a.m.LHR - YSJ
2 stops32h 14mAir Canada
Thu 18/95:55 a.m.YSJ - LHR
1 stop20h 40mAir Canada
Deal found 27/7C$ 958
Mon 25/86:50 a.m.LHR - YSJ
3 stops31h 59mMultiple Airlines
Mon 1/910:45 a.m.YSJ - LHR
2 stops30h 15mMultiple Airlines
Deal found 28/7C$ 1,354

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 29 July 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

Thu 11/9

6:50 a.m.-11:04 a.m.

2 stops32h 14m

Saint John

Thu 18/9

5:55 a.m.-6:35 a.m.

1 stop20h 40m

C$ 958

LondonSaint John

LHR - YSJ

LHRYSJ

London Heathrow

Mon 25/8

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

3 stops31h 59m

Saint John

Mon 1/9

10:45 a.m.-9:00 p.m.

2 stops30h 15m

C$ 1,354

LondonSaint John

LHR - YSJ

LHRYSJ

London Heathrow

Thu 11/9

6:20 a.m.-3:45 p.m.

2 stops13h 25m

C$ 713

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/7

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.

Reviews of airlines servicing St John

Get insights into the airlines that provide service to St John. 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 St John. Reviews last updated 29 July 2025.
Read reviews from past customers who have flown 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
9,822 reviews
Check prices

Food

6.3

Crew

7.8

Boarding

7.3

Overall

7.1

Entertainment

6.8

Comfort

7.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jul 2025

YWG - YVR

Once we got on the plane everything was good. BUT a 3 hour delay was unacceptable. Will not fly Air Canada if I can help it.
Air Canada
7.1
Good
9,822 reviews
Air Canada
7.1
Good
9,822 reviews
Check prices

Food

6.3

Crew

7.8

Boarding

7.3

Overall

7.1

Entertainment

6.8

Comfort

7.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jul 2025

YWG - YVR

Once we got on the plane everything was good. BUT a 3 hour delay was unacceptable. Will not fly Air Canada if I can help it.

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.

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

    Our cheapest airline available from London Heathrow Airport to Saint John is Air Canada. Our recent data shows that you can find tickets from as low as C$ 958 on this airline. Air Canada is priced at 11% lower than the current average price of a flight leaving 3 months from now.

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

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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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