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Cheap flights from Saint John to London Heathrow Airport from C$ 674

YSJ — LHR
5 Oct — 12 Oct1
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

Sun 18/104:40 p.m. -
2 stops24h 55m
Sun 25/104:20 p.m. -
2 stops45h 05m
Deal found 3/9C$ 1,147
Wed 11/1111:05 a.m. -
2 stops15h 15m
Sun 15/111:35 p.m. -
2 stops48h 50m
Deal found 1/9C$ 1,148
Fri 2/105:00 a.m. -
2 stops22h 15m
Sat 10/1012:00 p.m. -
2 stops31h 59m
Deal found 2/9C$ 1,154
Sat 31/1011:05 a.m. -
2 stops16h 25m
Sun 8/111:00 p.m. -
1 stop25h 25m
Deal found 4/9C$ 1,291
Wed 11/1111:05 a.m. -
1 stop16h 05m
Sat 14/1112:00 p.m. -
2 stops26h 25m
Deal found 1/9C$ 1,299
Sun 18/104:40 p.m. -
1 stop9h 50m
Sun 25/107:40 a.m. -
2 stops18h 44m
Deal found 3/9C$ 1,313
Fri 2/104:40 p.m. -
1 stop13h 20m
Sat 10/106:50 a.m. -
2 stops21h 01m
Deal found 3/9C$ 1,316

Find flight deals from St John to Heathrow

Round-trip from

C$ 1,147

One-way from

C$ 674
United Airlines
  • United Airlines
  • 18/10-25/10
  • 4 total stops
  • 70h 00m total
  • Saint John to London
Search Deals
Air Canada
  • Air Canada
  • 18/10-31/12
  • 1 total stop
  • 15h 45m total
  • Saint John to London
Search Deals

Cheapflights Fare Finder

 
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 Saint John - LHR London Heathrow

YSJLHR

Saint John

Sun 18/10

12:50 p.m.-8:35 a.m.

1 stop15h 45m

London Heathrow

Wed 31/12

12:00 a.m.-7:00 p.m.

Nonstop0h 00m

C$ 674

Saint JohnLondon

YSJ Saint John - LHR London Heathrow

YSJLHR

Saint John

Sun 18/10

6:55 a.m.-9:05 a.m.

3 stops46h 10m

London Heathrow

Wed 31/12

12:00 a.m.-7:00 p.m.

Nonstop0h 00m

C$ 733

Saint JohnLondon

YSJ Saint John - LHR London Heathrow

YSJLHR

Saint John

Tue 20/10

4:40 p.m.-8:35 a.m.

2 stops35h 55m

London Heathrow

Wed 31/12

12:00 a.m.-7:00 p.m.

Nonstop0h 00m

C$ 1,072

Saint JohnLondon

YSJ Saint John - LHR London Heathrow

YSJLHR

Saint John

Sun 18/10

4:40 p.m.-9:35 p.m.

2 stops24h 55m

London Heathrow

Sun 25/10

4:20 p.m.-10:25 a.m.

2 stops45h 05m

C$ 1,147

Saint JohnLondon

YSJ Saint John - LHR London Heathrow

YSJLHR

Saint John

Wed 11/11

11:05 a.m.-5:55 a.m.

2 stops14h 50m

London Heathrow

Sat 14/11

12:50 p.m.-10:25 a.m.

2 stops25h 35m

C$ 1,148

Saint JohnLondon

YSJ Saint John - LHR London Heathrow

YSJLHR

Saint John

Wed 11/11

11:05 a.m.-6:20 a.m.

2 stops15h 15m

London Heathrow

Sun 15/11

1:35 p.m.-10:25 a.m.

2 stops48h 50m

C$ 1,148

Saint JohnLondon

YSJ Saint John - LHR London Heathrow

YSJLHR

Saint John

Fri 2/10

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

2 stops20h 55m

London Heathrow

Sat 10/10

6:00 p.m.-3:59 p.m.

2 stops25h 59m

C$ 1,154

Saint JohnLondon

YSJ Saint John - LHR London Heathrow

YSJLHR

Saint John

Mon 18/1

11:05 a.m.-8:25 a.m.

2 stops17h 20m

London Heathrow

Fri 22/1

8:00 a.m.-10:25 a.m.

2 stops30h 25m

C$ 1,158

Saint JohnLondon

YSJ Saint John - LHR London Heathrow

YSJLHR

Saint John

Sat 31/10

6:00 p.m.-5:55 a.m.

2 stops56h 55m

London Heathrow

Sun 8/11

12:05 p.m.-10:25 a.m.

2 stops50h 20m

C$ 1,159

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/9

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

Reviews of airlines servicing Heathrow

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
11,583 reviews
Check prices

Food

6.3

Entertainment

6.8

Overall

7.1

Crew

7.8

Boarding

7.3

Comfort

7.1

Reviews

1 / 20
2.0
Mediocre

Sylvia,Aug 2026

YYZ - PHL

Our flight from Kelowna was 5 hours delayed. We missed our connection. We were able to get to a hotel by 3:00 a.m. but the breakfast cost us $40. The hotel was good. We were rescheduled for the flight the next night when it was canceled. There were no hotel vouchers available which didn't matter because there were no hotel rooms available. We decided to just drive which was not easy doing a one-way rental to the United States. Worst possible trip I've ever had
Air Canada
7.1
Good
11,583 reviews
Air Canada
7.1
Good
11,583 reviews
Check prices

Food

6.3

Entertainment

6.8

Overall

7.1

Crew

7.8

Boarding

7.3

Comfort

7.1

Reviews

1 / 20
2.0
Mediocre

Sylvia,Aug 2026

YYZ - PHL

Our flight from Kelowna was 5 hours delayed. We missed our connection. We were able to get to a hotel by 3:00 a.m. but the breakfast cost us $40. The hotel was good. We were rescheduled for the flight the next night when it was canceled. There were no hotel vouchers available which didn't matter because there were no hotel rooms available. We decided to just drive which was not easy doing a one-way rental to the United States. Worst possible trip I've ever had

Related info for your journey

  • 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 24h 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$ 1,281), 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
Luton
Slough
Marlow
Cobham
Hounslow
Leamington Spa
Northampton
Watford
High Wycombe
Stratford-upon-Avon
Moreton-in-Marsh

Browse thousands of different options on Cheapflights for your next trip

Top airline flying from St John to Heathrow

AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 1,281AverageC$ 1,449FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

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