ONT - LHR

£288 Find Cheap Flights from Ontario to London Heathrow Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Heathrow departing on 30/4. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to London, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to London, as well as popular online travel agencies
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Everything you should know

Cheapest return fare
£462
Overall average: £525
Virgin Atlantic
Sat 7/2Sat 21/2
ONT - LHR • 1 stop
Cheapest one-way flight
£288
Typical prices: £473-£542
JetBlue
Thu 30/4
ONT - LHR • 1 stop
When to travel
November
Cheapest • 25% price drop
September
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to Heathrow!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Ontario to Heathrow (ONT-LHR)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Ontario 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.

Recent return flight deals from Ontario to Heathrow

Sat, 7 Feb - Sat, 21 Feb
Virgin Atlantic Logo
12:41 - 11:40
ONT
-
LHR
14h 59m1 stop
Virgin Atlantic Logo
10:45 - 21:44
LHR
-
ONT
18h 59m1 stop
£462Virgin Atlantic
Sat, 14 Feb - Sat, 21 Feb
Iberia Logo
07:10 - 06:50
ONT
-
LHR
15h 40m1 stop
Iberia Logo
06:05 - 22:49
LHR
-
ONT
24h 44m2 stops
£469Iberia
Wed, 21 Jan - Wed, 28 Jan
Iberia Logo
07:16 - 08:35
ONT
-
LHR
17h 19m1 stop
Iberia Logo
07:35 - 22:48
LHR
-
ONT
23h 13m2 stops
£470Iberia
Thu, 5 Mar - Thu, 12 Mar
Delta Logo
07:30 - 10:30
ONT
-
LHR
19h 00m1 stop
Delta Logo
08:40 - 21:04
LHR
-
ONT
19h 24m2 stops
£471Delta
Tue, 20 Jan - Tue, 27 Jan
Multiple Airlines Logo
05:05 - 11:50
ONT
-
LHR
22h 45m2 stops
Multiple Airlines Logo
09:30 - 21:58
LHR
-
ONT
20h 28m2 stops
£472Multiple Airlines
Thu, 5 Mar - Thu, 12 Mar
Delta Logo
06:00 - 08:45
ONT
-
LHR
18h 45m2 stops
Delta Logo
06:30 - 17:12
LHR
-
ONT
17h 42m2 stops
£473Delta
Thu, 5 Mar - Thu, 12 Mar
Delta Logo
06:00 - 11:40
ONT
-
LHR
21h 40m2 stops
Delta Logo
06:30 - 21:04
LHR
-
ONT
21h 34m2 stops
£474Delta
Mon, 2 Feb - Mon, 9 Feb
British Airways Logo
16:45 - 13:15
ONT
-
LHR
12h 30m1 stop
British Airways Logo
06:05 - 22:48
LHR
-
ONT
24h 43m2 stops
£475British Airways
Sun, 15 Mar - Mon, 23 Mar
Air Canada Logo
05:15 - 07:10
ONT
-
LHR
18h 55m2 stops
Air Canada Logo
14:30 - 12:18
LHR
-
ONT
28h 48m2 stops
£476Air Canada
Fri, 30 Jan - Tue, 3 Feb
United Airlines Logo
13:53 - 12:00
ONT
-
LHR
14h 07m1 stop
United Airlines Logo
07:30 - 21:59
LHR
-
ONT
22h 29m2 stops
£478United Airlines
Booking Insights

KAYAK's insights & trends for Ontario to Heathrow flights

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

What is the cheapest month to fly from Ontario to London Heathrow Airport?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario to London Heathrow Airport, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Ontario to London Heathrow Airport is November, where tickets cost £467 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is £985 and £756 respectively.

How far in advance should I book a flight from Ontario to London Heathrow Airport?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Ontario to London Heathrow Airport, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Ontario to London Heathrow Airport, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 15 weeks before departure.

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Good to know - Cheap tickets from Ontario to London Heathrow Airport

Low seasonJanuary
Cheapest flight£288
Most popular time to fly and prices are also 17% lower on average.
Flight from Ontario to London Heathrow Airport

When to book flights from Ontario to Heathrow

Are your dates flexible? Find out the best times to travel from Ontario to Heathrow based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns 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.

FAQs for booking Ontario to London Heathrow Airport flights

  • What is the cheapest flight from Ontario to London Heathrow Airport?

    In the last 3 days, the lowest price for a flight from Ontario to London Heathrow Airport was £265 for a one-way ticket and £462 for a return.

  • Which airports will I be using when flying from Ontario to London Heathrow Airport?

    Ontario airport is called Ontario and the only airport in London Heathrow Airport is London Heathrow.

  • Which aircraft models fly most regularly from Ontario to London Heathrow Airport?

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

  • How does KAYAK find such low prices on flights from Ontario to London Heathrow Airport?

    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 Ontario to London Heathrow Airport.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to London Heathrow Airport?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London Heathrow Airport from Ontario 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 Ontario to London Heathrow Airport?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to London Heathrow Airport with an airline and back to Ontario with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to London Heathrow Airport?

    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 Heathrow Airport from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Everything you need to know for your flight from Ontario to Heathrow

Information on your arrival and departure airports

Ontario (ONT)
Heathrow (LHR)