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723 € Cheap Flights from Saint John to London Heathrow

Compare Saint John to London Heathrow flight deals

Find the cheapest month or even day of the year to fly to London Heathrow

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Flight deals from Saint John to London Heathrow

Looking for a cheap last-minute deal or the best return flight from Saint John to London Heathrow? Find the lowest prices on one-way and return tickets right here.
London.723 € per passenger.Departing Thu, 16 Oct, returning Sun, 9 Nov.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Saint John on Thu, 16 Oct, arriving in London Heathrow.Inbound indirect flight with Air Canada, departs from London Heathrow on Sun, 9 Nov, arriving in Saint John.Price includes taxes and charges.From 723 €, select.
London.767 € per passenger.Departing Sat, 13 Sep, returning Mon, 22 Sep.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Saint John on Sat, 13 Sep, arriving in London Heathrow.Inbound indirect flight with Air Canada, departs from London Heathrow on Mon, 22 Sep, arriving in Saint John.Price includes taxes and charges.From 767 €, select.
London.793 € per passenger.Departing Fri, 8 Aug, returning Fri, 15 Aug.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Saint John on Fri, 8 Aug, arriving in London Heathrow.Inbound indirect flight with Air Canada, departs from London Heathrow on Fri, 15 Aug, arriving in Saint John.Price includes taxes and charges.From 793 €, select.
London.947 € per passenger.Departing Sat, 1 Nov, returning Thu, 1 Jan.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Saint John on Sat, 1 Nov, arriving in London Heathrow.Inbound indirect flight with Air Canada, departs from London Heathrow on Thu, 1 Jan, arriving in Saint John.Price includes taxes and charges.From 947 €, select.

Find the cheapest month to fly from Saint John to London Heathrow

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Saint John to London Heathrow flights are currently cheapest in September.
Aug
from 793 €
Sep
from 767 €
Oct
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Nov
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Dec
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Jan
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Feb
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Saint John to London Heathrow: Alternative routes

Compare routes from Saint John to London below. You may find an airport to fly into that's cheaper, faster, or easier than London Heathrow.

Saint John to London: Flight information

The things to know before you go.
Cheapest flight found723 €
Cheapest month to flyOctober

Finding cheap flights from Saint John to London Heathrow: Frequently asked questions

The best price we found for a return flight from Saint John to London Heathrow is 723 €. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Saint John to London Heathrow. But we found flights with one or more stops from 723 €.
As of August 2025, there are no flights flying from Saint John to London Heathrow.
The cheapest month to fly from Saint John to London Heathrow is usually October.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Saint John Airport to London Heathrow Airport on Thursday, 16 October 2025.
No airlines currently offer direct flights between Saint John Airport and London Heathrow Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to London Heathrow but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to London is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Air Canada offers the cheapest flight tickets to London Heathrow.

Flying from Saint John Airport (YSJ) to London Heathrow Airport (LHR): what you need to know

  • London is three hours ahead of Saint John and is in the UTC+0 timezone.

  • Arriving two hours before an international flight and one hour ahead of a domestic departure are tried-and-true travel tips. Be at the airport on time to catch your YSJ to LHR flight.

  • Flying during a peak month like August? Public holidays and other high seasons can result in longer queues at airport checkpoints. Play things extra safe and get there up to four hours ahead of an international flight and two hours before a domestic departure.

How to find the cheapest flights from Saint John Airport (YSJ) to London Heathrow Airport (LHR)

  • The lowest price we've seen for a one-way Saint John Airport to London Heathrow Airport flight is 276 €. A round-trip ticket is currently 723 €. Depending on the availability when you book, these fares can change.

  • Don't leave everything to the last moment. You're more likely to get cheap tickets from YSJ to LHR if you book ahead. Airlines often offer some great early bird discounts.

  • If you're willing to be flexible with your travel dates, use the 'Whole month' search tool. It'll find the lowest price across the month when searching for a flight from Saint John Airport to London Heathrow Airport.

  • You don't need to check back in every day to see if fares have gone down when you set up a Price Alert. We'll let you know the moment there's a change in price on cheap flights from YSJ to LHR.

  • Lock in the ideal flight for you by using the filters. To see the 'Best,' 'Fastest' or 'Cheapest' flights from Saint John Airport to London Heathrow Airport, use the 'Sort by' function. You can also filter by airline, departure and arrival times, and journey duration.

Handy information about Saint John Airport (YSJ)

  • 77.05% of flights that leave from Saint John Airport arrive at their destination on schedule.

  • Central Saint John to Saint John Airport is approximately 24 kilometres. Depending on traffic, it'll take you about 20 minutes to get there if you're catching a cab, ride-sharing or driving.

  • The trip on public transport will take about 55 minutes.

  • Looking for a handy hotel close to YSJ? If you've booked an early flight from Saint John Airport to London Heathrow Airport, these accommodation options will have you moments from check-in:

Arriving at London Heathrow Airport (LHR)

Getting from London Heathrow Airport (LHR) to central London

  • London Heathrow Airport to the centre of London has a drive time of around 55 minutes. It's approximately 31 kilometres away.

  • Travelling on public transport typically takes 1 hour.

When to fly to London Heathrow Airport (LHR)

  • July is the most popular month for flights from Saint John Airport to London Heathrow Airport. To skip the crowds, go to London in February.

  • When reserving your flight from Saint John Airport to London Heathrow Airport, think about the type of weather you like. July is the warmest month in London, with temperatures ranging from 11ºC (52ºF) to 26ºC (79ºF).

  • January has average temperatures of between 0ºC (32ºF) and 9ºC (48ºF). Look for cheap tickets from YSJ to LHR around that time if you like travelling in cooler conditions.

Explore more of United Kingdom

  • London has loads to offer, but there are so many other parts of United Kingdom waiting to be discovered. About 161 kilometres north-west of London, a visit to Birmingham will keep your itinerary packed. Start with attractions like Cadbury World, The Library of Birmingham and National Sea Life Centre.

  • If there's time to check out another major stop in United Kingdom, consider Bristol, about 177 kilometres west of London. Clifton Suspension Bridge, Cabot Tower and Brandon Hill Nature Park are key reasons to visit.

Plan the rest of your trip from Saint John to London

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.