$389 Find Cheap Flights from the United Kingdom to Ontario

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Ontario departing on 5/6. 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 Ontario

 
These are the airlines KAYAK users have selected most often from within our search results for flights to Ontario, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results for flights to Ontario, as well as popular online travel agencies
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Flight Deals

Cheap Flights from the United Kingdom to Ontario

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from the United Kingdom to Ontario 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 round-trip flight deals from the United Kingdom to Ontario

Sun, Apr 19 - Sun, Apr 26
United Airlines Logo
9:00 am - 10:45 pm
LHR
-
ONT
21h 45m
2 stops
United Airlines Logo
6:00 am - 9:40 am
ONT
-
LHR
19h 40m
2 stops
$606United Airlines
Sat, Apr 18 - Sat, Apr 25
United Airlines Logo
10:50 am - 10:45 pm
LHR
-
ONT
19h 55m
2 stops
United Airlines Logo
6:00 am - 8:20 am
ONT
-
LHR
18h 20m
2 stops
$608United Airlines
Wed, Apr 22 - Wed, Apr 29
British Airways Logo
10:05 am - 4:22 pm
LHR
-
ONT
14h 17m
1 stop
British Airways Logo
10:59 am - 7:55 am
ONT
-
LHR
12h 56m
1 stop
$611British Airways
Thu, Sep 10 - Tue, Sep 29
British Airways Logo
2:25 pm - 9:08 pm
LHR
-
ONT
14h 43m
1 stop
British Airways Logo
1:31 pm - 10:30 am
ONT
-
LHR
12h 59m
1 stop
$619British Airways
Sun, May 3 - Sun, May 10
American Airlines Logo
12:20 pm - 10:09 am
LGW
-
ONT
29h 49m
2 stops
American Airlines Logo
6:00 am - 10:40 am
ONT
-
LGW
20h 40m
2 stops
$654American Airlines
Mon, Apr 27 - Sat, May 9
Delta Logo
10:25 am - 10:37 pm
LGW
-
ONT
20h 12m
2 stops
Delta Logo
1:35 pm - 4:00 pm
ONT
-
LGW
18h 25m
2 stops
$679Delta
Mon, Apr 27 - Sat, May 9
Delta Logo
10:25 am - 9:00 pm
LGW
-
ONT
18h 35m
2 stops
Delta Logo
1:35 pm - 4:00 pm
ONT
-
LGW
18h 25m
2 stops
$682Delta
Thu, Apr 9 - Tue, Apr 21
Iberia Logo
8:40 pm - 10:36 pm
LGW
-
ONT
33h 56m
2 stops
Iberia Logo
2:08 pm - 8:00 pm
ONT
-
LGW
21h 52m
2 stops
$765Iberia
Tue, Jun 2 - Tue, Jul 7
American Airlines Logo
1:10 pm - 11:59 pm
EDI
-
ONT
18h 49m
2 stops
American Airlines Logo
1:10 pm - 4:30 pm
ONT
-
EDI
19h 20m
2 stops
$775American Airlines
Fri, Apr 17 - Fri, May 8
Iberia Logo
11:30 am - 11:46 pm
LGW
-
ONT
20h 16m
2 stops
Iberia Logo
2:08 pm - 8:00 pm
ONT
-
LGW
21h 52m
2 stops
$854Iberia
Booking Insights

KAYAK's insights & trends for flights to Ontario

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

What is the cheapest flight to Ontario?

These are the best round-trip prices found by users searching on KAYAK in the last 72 hours.

In the last 3 days, the cheapest flight deal to Ontario was found on the route from London, at $606 return. The most popular connection is from Dallas to Ontario and KAYAK users have found round-trip deals for as low as $169 in the last 3 days.

What is the cheapest month to fly to Ontario?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights to Ontario, 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 to Ontario is September, where tickets cost $545 on average for return flights. On the other hand, the most expensive months are July and December, where the average cost of tickets from the United Kingdom is $854 and $814 respectively. For one-way flights, the best month to travel is May with an average price of $613.

How far in advance should I book a flight to Ontario?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights to Ontario, 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, you should book around 2 weeks before departure, which saves you about 47% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 11 weeks before departure.

Find deals

Good to know

Low seasonJanuary
Cheapest flight$389
Best time to beat the crowds with an average 10% drop in price.
Most popular time to fly and prices are also 22% lower on average.
Flight from London Gatwick Airport to Ontario

FAQs - booking Ontario flights

  • What is the cheapest flight to Ontario?

    In the last 3 days, the cheapest flight deal to Ontario was found on the route from London, at $606 return. The most popular connection is from Dallas to Ontario and KAYAK users have found round-trip deals for as low as $169 in the last 3 days.

  • How far is Ontario Airport from central Ontario?

    You’ll need to travel 3 miles to reach the Ontario city center from Ontario Airport.

  • What is the name of Ontario’s airport?

    All flights to Ontario land at Ontario Airport. The airport code is ONT,and it can also be referred to as Ontario or Ontario Intl.

  • How does KAYAK find such low prices on flights to Ontario?

    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 to Ontario.

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

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

  • What is the Hacker Fare option on flights to Ontario?

    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 Ontario with an airline and back with another airline.

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

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

  • How many direct flights to Ontario are there each week?

    Each week there are around 856 direct flights from within United Kingdom to Ontario. The most common day for departures is Monday, with 15% of flights taking off on this day.

Top tips for finding cheap flights to Ontario

  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest Ontario flight deals.

Everything you need to know for your flight to Ontario

Information on the airport you'll fly into in Ontario

Ontario (ONT)