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Cheap flights from Saint John to London Heathrow Airport from C$ 935

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 4/4. Fares are subject to change and may not be available on all flights or dates of travel.
YSJ — LHR
25 Feb — 4 Mar1
1 adult

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 20 February 2025.

Round-trip from

C$ 1,227

One-way from

C$ 935

Popular in

July

Cheapest in

February

Average price

C$ 1,199
Air Canada
  • Air Canada
  • 6/4-13/4
  • 2 total stops
  • 19h 54m total
  • Saint John to London
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4/4
  • 4/4
  • 3 total stops
  • 21h 10m total
  • Saint John to London
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Highest demand for flights based on searches. 8% potential increase in price (C$ 164 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease (C$ 32 potential savings vs. average RT price).
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Average for round-trip flights in February 2025
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Find flight deals from St John to Heathrow

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 20 February 2025.

Sun 6/44:30 p.m.YSJ - LHR
1 stop10h 00mAir Canada
Sun 13/49:30 a.m.LHR - YSJ
1 stop9h 54mAir Canada
Deal found 19/2C$ 1,227
Sun 6/44:30 p.m.YSJ - LHR
2 stops14h 55mUnited Airlines
Sun 13/411:05 a.m.LHR - YSJ
2 stops17h 19mUnited Airlines
Deal found 19/2C$ 1,804
Mon 26/511:35 a.m.YSJ - LHR
2 stops20h 10mMultiple Airlines
Thu 29/512:10 p.m.LHR - YSJ
2 stops39h 39mMultiple Airlines
Deal found 19/2C$ 2,072

Find flights from St John to Heathrow within your budget

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 20 February 2025.

Fly from

St John

Fly to

Heathrow

Route

Depart

Return

Price

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Sun 6/4

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

1 stop10h 00m

London Heathrow

Sun 13/4

9:30 a.m.-3:24 p.m.

1 stop9h 54m

C$ 1,227

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Sun 6/4

4:30 p.m.-11:25 a.m.

2 stops14h 55m

London Heathrow

Sun 13/4

11:05 a.m.-12:24 a.m.

2 stops17h 19m

C$ 1,804

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Fri 4/4

4:30 p.m.-8:05 p.m.

3 stops23h 35m

C$ 1,156

Saint JohnLondon

YSJ - LHR

YSJLHR

Saint John

Fri 4/4

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

1 stop10h 00m

C$ 1,178

Flights are sorted by cheapest round-trip flights first.

Deals found on 20/2

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.

Travel insights for flights from St John to Heathrow

Get recent, data-driven insights about flights from St John to Heathrow including ideal travel times, pricing trends, and more.

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

Currently, January is the cheapest month in which you can book a flight from Saint John to London Heathrow Airport (average of C$ 560). Flying from Saint John to London Heathrow Airport in July is currently the most expensive (average of C$ 874). 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.

Rainfall in Heathrow by month

Plan your trip to Heathrow by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in London Heathrow Airport ranges from 40.0 - 70.0 mm per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Heathrow Airport when rainfall is around 40.0 mm.

Temperature in Heathrow by month

Plan your trip to Heathrow by taking into account the average temperature totals by month.

If weather is an important factor for your trip to London Heathrow Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

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 20 February 2025.
United Airlines
7.4
Good
8,765 reviews
Check prices

Food

6.7

Boarding

7.7

Comfort

7.3

Overall

7.4

Crew

8.1

Entertainment

7.1

Reviews

1 / 20

8.0
Excellent

Anonymous,Dec 2024

YVR - SFO

It was a good experience. The flight took 45 minutes longer to fly and all passengers had to wait inside the plane till the technical issue was fixed. Overall it was a good experience.

United Airlines
7.4
Good
8,765 reviews
United Airlines
7.4
Good
8,765 reviews
Check prices

Food

6.7

Boarding

7.7

Comfort

7.3

Overall

7.4

Crew

8.1

Entertainment

7.1

Reviews

1 / 20

8.0
Excellent

Anonymous,Dec 2024

YVR - SFO

It was a good experience. The flight took 45 minutes longer to fly and all passengers had to wait inside the plane till the technical issue was fixed. Overall it was a good experience.

Air Canada
7.0
Good
8,748 reviews
United Airlines
7.4
Good
8,765 reviews
Check prices

Food

6.7

Boarding

7.7

Comfort

7.3

Overall

7.4

Crew

8.1

Entertainment

7.1

Reviews

1 / 20

8.0
Excellent

Anonymous,Dec 2024

YVR - SFO

It was a good experience. The flight took 45 minutes longer to fly and all passengers had to wait inside the plane till the technical issue was fixed. Overall it was a good experience.

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.

  • What are the cheapest airlines flying from Saint John to London Heathrow Airport round-trip?

    According to our current data, Air Canada (C$ 1,227), and United Airlines (C$ 1,804) offers the cheapest pricing from Saint John to London Heathrow Airport. Users have found that Air Canada is 4% 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, January is the cheapest month in which you can book a flight from Saint John to London Heathrow Airport (average of C$ 560). Flying from Saint John to London Heathrow Airport in July is currently the most expensive (average of C$ 874). 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 Saint John?

Book flights to Saint John if you plan to visit one of these locations
Brentford
Hounslow
Slough
Luton
Milton Keynes
Romford
Watford
Bromley
Bedford
Southall

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 20 February 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 1,186AverageC$ 1,288FlexibilityNo 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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