ONT - LHR

£353 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 20/9. 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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41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest return fare
£658
Typical prices: £687-£501
Iberia
Tue 6/10Tue 13/10
ONT - LHR • 1 stop
Cheapest one-way flight
£353
Typical prices: £298-£472
JetBlue
Sun 20/9
ONT - LHR • 1 stop
Direct flights
Not available
There are currently no direct flights between Ontario and Heathrow. You’ll need at least 1 connection.
Insights
Insights
Insights
Insights
When to travel
November
Cheapest • 30% 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

Tue, 6 Oct - Tue, 13 Oct
Iberia Logo
07:20 - 09:00
ONT
-
LHR
17h 40m
1 stop
Iberia Logo
06:15 - 18:57
LHR
-
ONT
20h 42m
2 stops
£658Iberia
Wed, 21 Oct - Wed, 28 Oct
Iberia Logo
12:35 - 14:25
ONT
-
LHR
17h 50m
1 stop
Iberia Logo
18:45 - 11:48
LHR
-
ONT
24h 03m
2 stops
£659Iberia
Tue, 6 Oct - Thu, 15 Oct
Iberia Logo
14:22 - 14:25
ONT
-
LHR
16h 03m
1 stop
Iberia Logo
07:50 - 21:08
LHR
-
ONT
21h 18m
2 stops
£661Iberia
Mon, 3 Aug - Thu, 20 Aug
Delta Logo
22:00 - 06:25
ONT
-
LHR
24h 25m
1 stop
Delta Logo
06:30 - 21:52
LHR
-
ONT
23h 22m
2 stops
£662Delta
Mon, 17 Aug - Tue, 25 Aug
Delta Logo
11:55 - 12:10
ONT
-
LHR
16h 15m
1 stop
Delta Logo
06:30 - 17:21
LHR
-
ONT
18h 51m
2 stops
£662Delta
Wed, 21 Oct - Wed, 28 Oct
Iberia Logo
14:22 - 17:15
ONT
-
LHR
18h 53m
2 stops
Iberia Logo
15:45 - 11:48
LHR
-
ONT
27h 03m
2 stops
£664Iberia
Wed, 21 Oct - Wed, 28 Oct
Iberia Logo
14:22 - 17:15
ONT
-
LHR
18h 53m
2 stops
Iberia Logo
19:40 - 11:48
LHR
-
ONT
23h 08m
2 stops
£665Iberia
Mon, 3 Aug - Thu, 20 Aug
Delta Logo
12:55 - 13:05
ONT
-
LHR
16h 10m
2 stops
Delta Logo
06:30 - 21:52
LHR
-
ONT
23h 22m
2 stops
£665Delta
Mon, 3 Aug - Thu, 20 Aug
Delta Logo
11:55 - 15:35
ONT
-
LHR
19h 40m
1 stop
Delta Logo
08:55 - 21:52
LHR
-
ONT
20h 57m
2 stops
£667Delta
Wed, 23 Sep - Fri, 9 Oct
United Airlines Logo
13:18 - 09:40
ONT
-
LHR
12h 22m
1 stop
United Airlines Logo
07:30 - 20:16
LHR
-
ONT
20h 46m
2 stops
£670United 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.

How much is a return flight from Ontario to London Heathrow Airport?

This analysis is based on the cheapest return trip price found on KAYAK in the last 12 months by searching for a flight from Ontario to London Heathrow Airport departing in October.

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 £461 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is £1,175 and £869 respectively.

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

Low seasonJanuary
Cheapest flight£353
Best time to beat the crowds but there is an average 7% increase in price.
Most popular time to fly and prices are also 26% 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 £353 for a one-way ticket and £658 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)