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

In the last 3 days, the lowest price for a flight from Saint John to London Heathrow Airport was C$ 674 for a one-way ticket and C$ 1,082 for a round-trip. Visit our flight page for the latest deals!>/a>

Which airports will I be using when flying from Saint John to London?

When flying out of Saint John you will be using Saint John. You will be landing at London, also known as London Heathrow. Visit our flight page for the latest deals!>/a>

Which aircraft models fly most regularly from Saint John to London?

We unfortunately don’t have that data for this specific route.

Which airline alliances offer flights from Saint John to London?

Star Alliance is the only airline alliance operating flights between Saint John and London.

How does KAYAK find such low prices on flights from Saint John to London?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Saint John to London. Visit our flight page for the latest deals!>/a>

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Saint John to London?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London from Saint John is likely to change within 7 days, so travellers know whether to wait or book now. Visit our flight page for the latest deals!>/a>

What is the Hacker Fare option on flights from Saint John to London?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to London with an airline and back to Saint John with another airline. Visit our flight page for the latest deals!>/a>

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Saint John to London?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to London from Saint John up to 3 days before/after your preferred dates. You can then pick the flights that suit you best. Visit our flight page for the latest deals!>/a>

What is the cheapest layover airport when flying from Saint John to London?

Flights via Montreal (YUL) offer the most affordable fares, with an average round-trip price of C$ 1,166.

What is the most popular layover airport when flying from Saint John to London?

Toronto (YYZ) is the top choice – 75% of KAYAK users who clicked on one-stop flights from Saint John to London picked an itinerary connecting there.

Which layover airport has the quickest connection when flying from Saint John to London?

If you prefer a quick connection, Montreal (YUL) often has the shortest layovers from Saint John to London, with an average of 1h 39m .

Which layover airport offers the shortest total travel time from Saint John to London?

Consider flying via Montreal (YUL) for the shortest journey. The average one-way travel time for flights connecting there is 10h 00m .

C$ 674 Cheap Flights from Saint John to London (YSJ - LHR)

YSJ - LHR

KAYAK searches hundreds of travel sites at once for deals on flights to London Heathrow Airport

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Cheapest round-trip

C$ 1,082

Air Canada

Fri 23/1Tue 27/1

YSJ - LHR • 1 stop

Cheapest one-way flights

C$ 674

Multiple Airlines

Sat 31/1

YSJ - LHR • 3 stops

Start a new search

KAYAK searches hundreds of sites at once to find you the best travel deals.

We hope you love your trip to Heathrow!

Flight Deals

Cheap Flights from Saint John to Heathrow (YSJ-LHR)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Saint John to Heathrow that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Recent round-trip flight deals from Saint John to Heathrow

Fri, 23 Jan - Tue, 27 Jan

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

YSJ

LHR

10h 55m1 stop

1:45 p.m. - 11:29 p.m.

LHR

YSJ

37h 44m2 stops

C$ 1,082Air Canada

Fri, 23 Jan - Tue, 27 Jan

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

YSJ

LHR

13h 05m2 stops

6:50 a.m. - 3:40 p.m.

LHR

YSJ

12h 50m2 stops

C$ 1,087Air Canada

Tue, 13 Jan - Sun, 8 Feb

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

YSJ

LHR

10h 55m1 stop

6:50 a.m. - 3:40 p.m.

LHR

YSJ

12h 50m2 stops

C$ 1,088Air Canada

Tue, 13 Jan - Sun, 8 Feb

4:15 p.m. - 11:20 a.m.

YSJ

LHR

15h 05m2 stops

6:50 a.m. - 3:40 p.m.

LHR

YSJ

12h 50m2 stops

C$ 1,098Air Canada

Sun, 22 Feb - Mon, 9 Mar

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

YSJ

LHR

10h 55m1 stop

1:25 p.m. - 3:35 p.m.

LHR

YSJ

29h 10m1 stop

C$ 1,101Air Canada

Sun, 22 Feb - Wed, 11 Mar

4:15 p.m. - 6:40 a.m.

YSJ

LHR

34h 25m2 stops

4:20 p.m. - 3:35 p.m.

LHR

YSJ

26h 15m2 stops

C$ 1,104United Airlines

Tue, 13 Jan - Sun, 8 Feb

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

YSJ

LHR

10h 55m1 stop

1:00 p.m. - 10:49 a.m.

LHR

YSJ

25h 49m1 stop

C$ 1,106Air Canada

Wed, 25 Feb - Sun, 8 Mar

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

YSJ

LHR

10h 55m1 stop

6:00 p.m. - 3:35 p.m.

LHR

YSJ

24h 35m2 stops

C$ 1,110Air Canada

Wed, 25 Feb - Sun, 8 Mar

4:15 p.m. - 11:20 a.m.

YSJ

LHR

15h 05m2 stops

6:00 p.m. - 3:35 p.m.

LHR

YSJ

24h 35m2 stops

C$ 1,119Air Canada

Sat, 10 Jan - Sun, 8 Feb

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

YSJ

LHR

10h 55m1 stop

6:50 a.m. - 3:40 p.m.

LHR

YSJ

12h 50m2 stops

C$ 1,152Air Canada

Booking Insights

KAYAK's insights & trends for Saint John to Heathrow flights

Get data-powered insights and trends into flights from Saint John to Heathrow to help you find the cheapest flights, the best time to fly and much more.

Airlines

Layovers

Which airlines fly direct between Saint John and London Heathrow Airport?

There is just one airline that flies from Saint John to London Heathrow Airport direct and that is Air Canada. The best round-trip deal found from Air Canada for the route is C$ 1,150.

Find deals

Low season	February
High season	December
Cheapest flight	C$ 674

Best time to beat the crowds (19% less expensive on average)

Most popular time to fly (18% more expensive on average)

Flight from Saint John to London

When to book flights from Saint John to Heathrow

Are your dates flexible? Find out the best times to travel from Saint John to Heathrow based on our flight data from the last year. Discover the cheapest month and even day to fly.

Estimated round-trip price

KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

What is the cheapest flight from Saint John to London Heathrow Airport?
In the last 3 days, the lowest price for a flight from Saint John to London Heathrow Airport was C$ 674 for a one-way ticket and C$ 1,082 for a round-trip.
Which airports will I be using when flying from Saint John to London?
When flying out of Saint John you will be using Saint John. You will be landing at London, also known as London Heathrow.
Which aircraft models fly most regularly from Saint John to London?
We unfortunately don’t have that data for this specific route.
Which airline alliances offer flights from Saint John to London?
Star Alliance is the only airline alliance operating flights between Saint John and London.
How does KAYAK find such low prices on flights from Saint John to London?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Saint John to London.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Saint John to London?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London from Saint John is likely to change within 7 days, so travellers know whether to wait or book now.
What is the Hacker Fare option on flights from Saint John to London?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to London with an airline and back to Saint John with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Saint John to London?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to London from Saint John up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Saint John to Heathrow

Need help choosing which airline to fly with from Saint John to Heathrow? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.

7.1

Air CanadaOverall score based on 10544 reviews

6.8Entertainment

7.3Boarding

6.3Food

7.8Crew

7.1Comfort

Airline reviews

They are very proactive and made our boarding easy and always notified us about any changes well in advance.

8.0 ExcellentTatyana, Dec 2025

YUL - LAX

Everything you need to know for your flight from Saint John to Heathrow

Airports

Cabin class

Complete your trip

Direct Flights

Flights to other cities

Origins

Other airports

Information on your arrival and departure airports

Saint John (YSJ)

Heathrow (LHR)

YSJ - LHR

C$ 674 Find Cheap Flights from Saint John to London

KAYAK searches hundreds of travel sites at once for deals on flights to London Heathrow Airport

Everything you should know

Cheap Flights from Saint John to Heathrow (YSJ-LHR)

Recent round-trip flight deals from Saint John to Heathrow

Recent one-way flight deals from Saint John to Heathrow

Recent last minute flight deals from Saint John to Heathrow

KAYAK's insights & trends for Saint John to Heathrow flights

Get data-powered insights and trends into flights from Saint John to Heathrow to help you find the cheapest flights, the best time to fly and much more.

Which airlines fly direct between Saint John and London Heathrow Airport?

There is just one airline that flies from Saint John to London Heathrow Airport direct and that is Air Canada. The best round-trip deal found from Air Canada for the route is C$ 1,150.

What is the most popular layover airport when flying from Saint John to London?

Toronto (YYZ) is the top choice – 75% of KAYAK users who clicked on one-stop flights from Saint John to London picked an itinerary connecting there.

What is the cheapest layover airport when flying from Saint John to London?

Flights via Montreal (YUL) offer the most affordable fares, with an average round-trip price of C$ 1,166.

Which layover airport offers the shortest total travel time from Saint John to London?

Consider flying via Montreal (YUL) for the shortest journey. The average one-way travel time for flights connecting there is 10h 00m.

Which layover airport has the quickest connection when flying from Saint John to London?

If you prefer a quick connection, Montreal (YUL) often has the shortest layovers from Saint John to London, with an average of 1h 39m.

Good to know

When to book flights from Saint John to Heathrow

FAQs for booking Saint John to London flights

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

In the last 3 days, the lowest price for a flight from Saint John to London Heathrow Airport was C$ 674 for a one-way ticket and C$ 1,082 for a round-trip.

Which airports will I be using when flying from Saint John to London?

When flying out of Saint John you will be using Saint John. You will be landing at London, also known as London Heathrow.

Which aircraft models fly most regularly from Saint John to London?

We unfortunately don’t have that data for this specific route.

Which airline alliances offer flights from Saint John to London?

Star Alliance is the only airline alliance operating flights between Saint John and London.

How does KAYAK find such low prices on flights from Saint John to London?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Saint John to London.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Saint John to London?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London from Saint John is likely to change within 7 days, so travellers know whether to wait or book now.

What is the Hacker Fare option on flights from Saint John to London?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to London with an airline and back to Saint John with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Saint John to London?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to London from Saint John up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Saint John to Heathrow

Everything you need to know for your flight from Saint John to Heathrow

Information on your arrival and departure airports

Cabin class types available on flights to Heathrow

Complete your trip to London with a hotel stay or car rental

Find direct flights to and from Saint John and Heathrow

Flights to other popular destinations

Flights from domestic origins to Heathrow

Choose which airport to fly into in London