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Cheap flights from Saint John to London Heathrow Airport from C$ 590

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 6/7. Fares are subject to change and may not be available on all flights or dates of travel.
YSJ — LHR
9 Jul — 16 Jul1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from St John to Heathrow

Enter your travel dates to find the best prices.

Cheapest flights from St John to Heathrow
Explore the most affordable flight options available from St John to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 9 June 2026.

Thu 11/64:30 p.m.
YSJ
-
LHR
2 stops34h 25m
United Airlines
Mon 15/64:00 p.m.
LHR
-
YSJ
2 stops35h 52m
United Airlines
Deal found 7/6C$ 1,304
Thu 11/64:30 p.m.
YSJ
-
LHR
1 stop13h 30m
Air Canada
Mon 15/66:00 a.m.
LHR
-
YSJ
2 stops37h 50m
Air Canada
Deal found 9/6C$ 1,311
Tue 7/74:40 p.m.
YSJ
-
LHR
1 stop9h 50m
Air Canada
Tue 14/72:10 p.m.
LHR
-
YSJ
2 stops29h 35m
Air Canada
Deal found 9/6C$ 1,467
Sat 4/74:40 p.m.
YSJ
-
LHR
2 stops48h 20m
Air Canada
Sat 11/78:30 a.m.
LHR
-
YSJ
1 stop19h 20m
Air Canada
Deal found 6/6C$ 1,570

Find flight deals from St John to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from St John (YSJ) to Heathrow (LHR). 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 9 June 2026.

Round-trip from

C$ 1,467

One-way from

C$ 590
Air Canada
  • Air Canada
  • 7/7-14/7
  • 3 total stops
  • 39h 25m total
  • Saint John to London
Search Deals
6/7
  • 6/7
  • 3 total stops
  • 42h 20m total
  • Saint John to London
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from St John to Heathrow 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 9 June 2026.
Use the filters below to find and compare flights from Saint John to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Tue 7/7

4:40 p.m.-6:30 a.m.

1 stop9h 50m

London Heathrow

Tue 14/7

2:10 p.m.-3:45 p.m.

2 stops29h 35m

C$ 1,467

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Sat 4/7

4:40 p.m.-9:00 p.m.

2 stops48h 20m

London Heathrow

Sat 11/7

8:30 a.m.-11:50 p.m.

1 stop19h 20m

C$ 1,570

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Sat 4/7

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

2 stops14h 30m

London Heathrow

Sat 11/7

2:45 p.m.-3:45 p.m.

3 stops29h 00m

C$ 1,905

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Sun 5/7

5:00 a.m.-5:55 a.m.

2 stops20h 55m

London Heathrow

Sun 12/7

9:30 a.m.-3:45 p.m.

2 stops34h 15m

C$ 2,146
Cheapest one-way

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Mon 6/7

10:45 a.m.-9:05 a.m.

3 stops42h 20m

C$ 590
Quickest one-way

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Mon 6/7

4:40 p.m.-10:00 a.m.

1 stop13h 20m

C$ 1,224

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/6

Sorted by cheapest first

Best time to book a flight from St John to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow 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.

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated 9 June 2026.
Read reviews from past customers who have flown Air Canada from Saint John to London Heathrow Airport. 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
11,149 reviews
Check prices

Crew

7.8

Overall

7.1

Food

6.3

Comfort

7.1

Boarding

7.3

Entertainment

6.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jun 2026

YUL - LYS

The flight was cancelled. We were rebooked the next day on Air France but had a 12 hour layover in Paris. We lost 1 1/2 days of our vacation.
Air Canada
7.1
Good
11,149 reviews
Air Canada
7.1
Good
11,149 reviews
Check prices

Crew

7.8

Overall

7.1

Food

6.3

Comfort

7.1

Boarding

7.3

Entertainment

6.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jun 2026

YUL - LYS

The flight was cancelled. We were rebooked the next day on Air France but had a 12 hour layover in Paris. We lost 1 1/2 days of our vacation.

Related info for your journey

Find useful and relevant information for your journey from St John to Heathrow. 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 Heathrow?

    Located just 15.1 km from the city centre, Saint John is the airport most travellers will use when flying to London Heathrow from Saint John. Booking flights from Saint John (YSJ) to London Heathrow should be relatively easy as there are 0 daily outbound flights to London Heathrow from 1 airline.

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

    Departing from Saint John to London Heathrow Airport will take you 9h 50m. Airlines will cover a distance of 4712 km.

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

    According to our current data, Air Canada (C$ 1,194), offers the cheapest pricing from Saint John to London Heathrow Airport.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from St John to Heathrow 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

Travelling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Gatwick
Romford
Twickenham
Ilford
Bromley
Sutton
Hounslow
Slough
Marlow
Cobham
Leamington Spa
Northampton
Watford
Luton
High Wycombe
Stratford-upon-Avon
Moreton-in-Marsh

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Top airline flying from St John to Heathrow

Discover the top airline that operate flights from St John to Heathrow. 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 9 June 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 1,194AverageC$ 1,461FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

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

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

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Heathrow from St John.

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

Users can book flights with no change fees policies with our dedicated filters. Book flights from St John to Heathrow flexibly with Cheapflights today.

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

Yes! Start tracking prices for St John to Heathrow flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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