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Cheap flights from Saint John to London Heathrow Airport from C$ 1,003

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.
YSJ — LHR
26 nov. — 3 dic.1
1 adult
1 adult, Economy, 0 bags

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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 27 octubre 2025.

mié. 26/114:15 p.m.YSJ - LHR
1 stop10h 55mAir Canada
jue. 11/129:00 a.m.LHR - YSJ
2 stops18h 29mAir Canada
Deal found 26/10C$ 1,003
mié. 26/114:15 p.m.YSJ - LHR
1 stop10h 55mAir Canada
mié. 3/126:50 a.m.LHR - YSJ
2 stops12h 43mAir Canada
Deal found 26/10C$ 1,005
mié. 26/114:15 p.m.YSJ - LHR
3 stops19h 15mMultiple Airlines
jue. 11/122:50 p.m.LHR - YSJ
2 stops28h 55mMultiple Airlines
Deal found 26/10C$ 1,675
vie. 7/114:15 p.m.YSJ - LHR
1 stop10h 55mAir Canada
dom. 16/111:25 p.m.LHR - YSJ
2 stops25h 34mAir Canada
Deal found 26/10C$ 1,977
vie. 7/114:15 p.m.YSJ - LHR
2 stops34h 05mMultiple Airlines
dom. 16/1111:05 a.m.LHR - YSJ
2 stops32h 28mMultiple Airlines
Deal found 26/10C$ 2,052

Cheap 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 27 octubre 2025.

Round-trip from

C$ 1,003

Popular in

December

Cheapest in

September

Average price

C$ 1,100
Air Canada
  • Air Canada
  • 26/11-11/12
  • 3 total stops
  • 29h 24m total
  • Saint John to London
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (C$ 116 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 32 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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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 27 octubre 2025.
Use the filters below to find and compare flights from Saint John to London Heathrow Airport that are best for you.

Fly from

St John

Fly to

Heathrow

Route

Depart

Return

Price

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

mié. 26/11

4:15 p.m.-7:10 a.m.

1 stop10h 55m

London Heathrow

jue. 11/12

9:00 a.m.-11:29 p.m.

2 stops18h 29m

C$ 1,003

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

mié. 26/11

4:15 p.m.-7:10 a.m.

1 stop10h 55m

London Heathrow

mié. 3/12

6:50 a.m.-3:33 p.m.

2 stops12h 43m

C$ 1,005

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

vie. 20/2

4:15 p.m.-9:20 a.m.

2 stops13h 05m

London Heathrow

mar. 24/2

6:50 a.m.-3:35 p.m.

2 stops12h 45m

C$ 1,012

Flights are sorted by cheapest round-trip flights first.

Deals found on 26/10

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.

Cheapflights Insights

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

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

Currently, March is the cheapest month in which you can book a flight from Saint John to London Heathrow Airport (average of C$ 767). Flying from Saint John to London Heathrow Airport in December is currently the most expensive (average of C$ 1,296). 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 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 27 octubre 2025.
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
10,370 reviews
Check prices

Food

6.3

Entertainment

6.8

Boarding

7.3

Crew

7.8

Overall

7.1

Comfort

7.1

Reviews

1 / 20
2.0
Mediocre

robert,Sep 2025

YEG - YVR

There was nothing that I liked about air canada. My experience was terrible.
Air Canada
7.1
Good
10,370 reviews
Air Canada
7.1
Good
10,370 reviews
Check prices

Food

6.3

Entertainment

6.8

Boarding

7.3

Crew

7.8

Overall

7.1

Comfort

7.1

Reviews

1 / 20
2.0
Mediocre

robert,Sep 2025

YEG - YVR

There was nothing that I liked about air canada. My experience was terrible.

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 10h 55m. 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$ 1,168), offers the cheapest pricing from Saint John to London Heathrow Airport. Users have found that Air Canada is 6% cheaper than the other options available to this destination.

  • 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.

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

    Currently, March is the cheapest month in which you can book a flight from Saint John to London Heathrow Airport (average of C$ 767). Flying from Saint John to London Heathrow Airport in December is currently the most expensive (average of C$ 1,296). 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

Travelling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Sutton
Hounslow
Slough
Marlow
Leamington Spa
Milton Keynes
Romford
Watford
Bedford
Luton
Stratford-upon-Avon
Southall
Gatwick

Browse thousands of different options on Cheapflights for your next trip

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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 27 octubre 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 1,168AverageC$ 1,285FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

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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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