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Cheap flights from London Heathrow Airport to Saint John from C$ 834

LHR — YSJ
10 Oct — 17 Oct1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Heathrow to St John

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to St John

Thu 15/108:45 a.m. -
2 stops19h 06m
Thu 29/1011:05 a.m. -
2 stops19h 15m
Deal found 7/9C$ 834
Sat 24/109:30 a.m. -
1 stop10h 29m
Sat 31/106:00 p.m. -
2 stops48h 00m
Deal found 9/9C$ 902
Sat 3/109:30 a.m. -
1 stop10h 29m
Tue 27/1011:05 a.m. -
1 stop17h 05m
Deal found 5/9C$ 929
Sat 3/109:30 a.m. -
1 stop10h 29m
Mon 26/106:00 p.m. -
1 stop14h 20m
Deal found 5/9C$ 936
Sat 3/109:30 a.m. -
2 stops18h 21m
Wed 28/105:15 a.m. -
2 stops22h 55m
Deal found 5/9C$ 953

Find flight deals from Heathrow to St John

Round-trip from

C$ 834

Popular in

December

Cheapest in

February

Average price

C$ 1,358
Air Canada
  • Air Canada
  • 15/10-29/10
  • 4 total stops
  • 38h 21m total
  • London to Saint John
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Highest demand for flights based on searches. 9% potential increase in price (C$ 190 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease (C$ 51 potential savings vs. average RT price).
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Average for round-trip flights in September 2026
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Cheapflights Fare Finder

 
Use the filters below to find and compare flights from London Heathrow Airport to Saint John that are best for you.

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Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

LondonSaint John

LHR London Heathrow - YSJ Saint John

LHRYSJ

London Heathrow

Sat 3/10

9:30 a.m.-3:59 p.m.

1 stop10h 29m

Saint John

Tue 27/10

11:05 a.m.-7:10 a.m.

1 stop17h 05m

C$ 931

LondonSaint John

LHR London Heathrow - YSJ Saint John

LHRYSJ

London Heathrow

Sat 3/10

9:30 a.m.-11:51 p.m.

2 stops18h 21m

Saint John

Wed 28/10

11:05 a.m.-7:10 a.m.

1 stop17h 05m

C$ 942

LondonSaint John

LHR London Heathrow - YSJ Saint John

LHRYSJ

London Heathrow

Thu 15/10

6:00 a.m.-11:51 p.m.

2 stops21h 51m

Saint John

Mon 19/10

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

1 stop13h 20m

C$ 1,009

LondonSaint John

LHR London Heathrow - YSJ Saint John

LHRYSJ

London Heathrow

Mon 5/10

2:05 p.m.-11:51 a.m.

2 stops25h 46m

Saint John

Tue 27/10

5:15 a.m.-7:10 a.m.

2 stops22h 55m

C$ 1,068

LondonSaint John

LHR London Heathrow - YSJ Saint John

LHRYSJ

London Heathrow

Sat 3/10

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

2 stops49h 59m

Saint John

Fri 30/10

11:05 a.m.-6:40 a.m.

2 stops16h 35m

C$ 1,111

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

Sorted by cheapest first

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

Related info for your journey

  • 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.

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

    A quick flight from London Heathrow Airport to Saint John can take about 10h 29m. Air Canada provides one of the quickest options available for as low as C$ 931. The distance between London Heathrow Airport and Saint John is about 4712 km.

  • 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.

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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