Find flights
When to book
Airlines
FAQs

Cheap flights from Saint John to London Heathrow Airport from C$ 678

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 4/6. Fares are subject to change and may not be available on all flights or dates of travel.
YSJ — LHR
23 May — 30 May1
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 23 April 2026.

Sat 6/64:30 p.m.
YSJ
-
LHR
1 stop10h 00m
Air Canada
Sat 13/69:30 a.m.
LHR
-
YSJ
1 stop10h 20m
Air Canada
Deal found 22/4C$ 1,030
Tue 15/94:30 p.m.
YSJ
-
LHR
2 stops24h 30m
Air Canada
Tue 29/95:15 p.m.
LHR
-
YSJ
2 stops50h 34m
Air Canada
Deal found 21/4C$ 1,050
Mon 14/94:30 p.m.
YSJ
-
LHR
1 stop13h 30m
Air Canada
Mon 28/97:30 p.m.
LHR
-
YSJ
2 stops48h 19m
Air Canada
Deal found 21/4C$ 1,053
Sun 31/54:30 p.m.
YSJ
-
LHR
2 stops34h 00m
Air Canada
Thu 4/65:15 p.m.
LHR
-
YSJ
2 stops34h 37m
Air Canada
Deal found 18/4C$ 1,056
Sun 7/64:30 p.m.
YSJ
-
LHR
1 stop13h 30m
Air Canada
Sun 14/69:30 a.m.
LHR
-
YSJ
1 stop10h 20m
Air Canada
Deal found 23/4C$ 1,074

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 23 April 2026.

Round-trip from

C$ 1,030

One-way from

C$ 678
Air Canada
  • Air Canada
  • 6/6-13/6
  • 2 total stops
  • 20h 20m total
  • Saint John to London
Search Deals
4/6
  • 4/6
  • 2 total stops
  • 18h 00m 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 23 April 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

Sat 6/6

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

1 stop10h 00m

London Heathrow

Sat 13/6

9:30 a.m.-3:50 p.m.

1 stop10h 20m

C$ 1,030

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Sun 31/5

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

2 stops34h 00m

London Heathrow

Thu 4/6

5:15 p.m.-11:52 p.m.

2 stops34h 37m

C$ 1,056

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Sun 7/6

4:30 p.m.-9:35 a.m.

2 stops13h 05m

London Heathrow

Sun 14/6

9:30 a.m.-11:52 p.m.

2 stops18h 22m

C$ 1,097

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Mon 18/5

4:30 p.m.-10:40 a.m.

2 stops14h 10m

London Heathrow

Wed 27/5

12:15 p.m.-3:40 p.m.

2 stops31h 25m

C$ 1,145

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Fri 5/6

12:20 p.m.-10:00 a.m.

2 stops17h 40m

London Heathrow

Mon 8/6

11:05 a.m.-11:52 p.m.

2 stops40h 47m

C$ 1,228

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Mon 18/5

4:30 p.m.-10:00 a.m.

1 stop13h 30m

London Heathrow

Tue 2/6

9:30 a.m.-3:50 p.m.

1 stop10h 20m

C$ 1,239
Cheapest one-way

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Thu 4/6

12:00 p.m.-10:00 a.m.

2 stops18h 00m

C$ 678

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Sat 6/6

4:30 p.m.-3:00 p.m.

3 stops18h 30m

C$ 805
Quickest one-way

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Tue 19/5

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

1 stop10h 00m

C$ 1,222

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Thu 4/6

4:30 p.m.-10:00 a.m.

1 stop13h 30m

C$ 1,307

Flights are sorted by cheapest round-trip flights first.

Deals found on 20/4

Showing 1-10 of 11 resultsSorted by cheapest first
1
2

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 23 April 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
10,957 reviews
Check prices

Entertainment

6.8

Boarding

7.3

Crew

7.8

Overall

7.1

Food

6.3

Comfort

7.1

Reviews

1 / 20
8.0
Excellent

John,Apr 2026

YVR - YOW

Crew was very attentive and meals were good. My wife required a wheel chair due to an accident on vacation. The service in Toronto was poor and Ottawa no better. Southeast Asia could teach them lots. Flight originated in Manila on ANA which was cancelled due to a mechanical issue. We were put up overnight in the Savoy Hotel with dinner and breakfast. The airline staff and hotel staff were fantastic.
Air Canada
7.1
Good
10,957 reviews
Air Canada
7.1
Good
10,957 reviews
Check prices

Entertainment

6.8

Boarding

7.3

Crew

7.8

Overall

7.1

Food

6.3

Comfort

7.1

Reviews

1 / 20
8.0
Excellent

John,Apr 2026

YVR - YOW

Crew was very attentive and meals were good. My wife required a wheel chair due to an accident on vacation. The service in Toronto was poor and Ottawa no better. Southeast Asia could teach them lots. Flight originated in Manila on ANA which was cancelled due to a mechanical issue. We were put up overnight in the Savoy Hotel with dinner and breakfast. The airline staff and hotel staff were fantastic.

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. Airlines will cover a distance of 4712 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

    According to our current data, Air Canada (C$ 1,169), 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
Twickenham
Bromley
Sutton
Slough
Marlow
Cobham
Leamington Spa
Watford
Luton
High Wycombe
Stratford-upon-Avon
Hounslow
Moreton-in-Marsh

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 23 April 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 1,169AverageC$ 1,336FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

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

Cheapflights makes it easy to find St John to Heathrow flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.