LON - ONT

$523 Find Cheap Flights from London 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 from London to Ontario departing on 10/15. 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

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 in flight searches from London to Ontario, 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 London to Ontario, as well as popular online travel agencies
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Flights Deals

Cheap Flights from London to Ontario (LON-ONT)

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

Sun, Aug 24 - Tue, Sep 9
KLM Logo
5:25 pm - 7:11 pmLHR-ONT
33h 46m1 stop
KLM Logo
7:05 am - 6:45 amONT-LHR
15h 40m1 stop
$563KLM
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Fri, Aug 29 - Thu, Sep 11
 Logo
3:05 pm - 11:32 amLGW-ONT
28h 27m2 stops
 Logo
6:10 am - 8:10 amONT-LGW
18h 00m2 stops
Sun, Aug 24 - Tue, Sep 9
British Airways Logo
3:40 pm - 9:39 pmLHR-ONT
13h 59m1 stop
British Airways Logo
4:45 pm - 12:50 pmONT-LHR
12h 05m1 stop
$582British Airways
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Mon, Nov 24 - Fri, Dec 5
British Airways Logo
4:30 pm - 11:45 pmLHR-ONT
15h 15m1 stop
British Airways Logo
12:53 pm - 10:00 amONT-LHR
13h 07m1 stop
$583British Airways
Find Deal
Sun, Aug 24 - Tue, Sep 9
Iberia Logo
9:15 am - 12:08 amLHR-ONT
22h 53m2 stops
Iberia Logo
12:45 pm - 2:25 pmONT-LHR
17h 40m1 stop
$585Iberia
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Sun, Aug 24 - Tue, Sep 9
Delta Logo
6:30 am - 10:20 pmLHR-ONT
23h 50m2 stops
Delta Logo
7:05 am - 7:15 amONT-LHR
16h 10m2 stops
$586Delta
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Sun, Aug 24 - Tue, Sep 9
Delta Logo
6:30 am - 7:11 pmLHR-ONT
20h 41m2 stops
Delta Logo
7:05 am - 6:45 amONT-LHR
15h 40m1 stop
$587Delta
Find Deal
Tue, Nov 25 - Fri, Dec 5
Iberia Logo
6:10 am - 10:00 pmLHR-ONT
23h 50m2 stops
Iberia Logo
10:57 am - 11:40 amONT-LHR
16h 43m1 stop
$588Iberia
Find Deal
Wed, Sep 24 - Sun, Sep 28
Finnair Logo
10:30 am - 6:54 pmLHR-ONT
16h 24m1 stop
Finnair Logo
12:45 pm - 10:50 amONT-LHR
14h 05m1 stop
$590Finnair
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Sat, Aug 30 - Fri, Sep 5
Finnair Logo
9:15 am - 5:50 pmLHR-ONT
16h 35m2 stops
Finnair Logo
1:10 pm - 12:45 pmONT-LHR
15h 35m2 stops
$631Finnair
Find Deal
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KAYAK's insights & trends for London to Ontario flights

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

How much is a round-trip flight from London to Ontario?

What’s the cheapest day of the week to fly from London to Ontario?

The average price of all round-trip flights from London to Ontario clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Ontario on a Tuesday and more expensive on a Monday. On your return trip to London, you should consider flying back on a Wednesday, and avoid Saturdays for better deals.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from London 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 from London to Ontario is February, where tickets cost $546 (return) on average. On the other hand, the most expensive months are August and July, where the average cost of round-trip tickets is $1,107 and $1,041 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from London 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 on the flight from London to Ontario, you should book around 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 26 weeks before departure.

Good to know

Low seasonFebruary
High seasonSeptember
Cheapest flight$523
Best time to beat the crowds with an average 26% drop in price.
Most popular time to fly and prices are also 21% lower on average.
Flight from London Gatwick Airport to Ontario

When to book flights from London to Ontario

Are your dates flexible? Find out the best times to travel from London to Ontario 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.

FAQs for booking flights from London to Ontario

  • What is the cheapest flight from London to Ontario?

    In the last 3 days, the lowest price for a flight from London to Ontario was $523 for a one-way ticket and $563 for a round-trip.

  • Do I need a passport to fly between London and Ontario?

    A passport is required to fly from London to Ontario.

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

    London is served by 2 major airports and there is only 1 main airport in Ontario. You will leave London from one of these airports: London Gatwick or London Heathrow. You will be arriving at Ontario.

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

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

  • Which airline alliances offer flights from London to Ontario?

    oneworld, Star Alliance, and SkyTeam are the airline alliances operating flights between London and Ontario, with oneworld being the most commonly used for this route.

  • How does KAYAK find such low prices on flights from London 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 from London to Ontario.

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

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

  • What is the Hacker Fare option on flights from London 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 to London with another airline.

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

Information on your arrival and departure airports

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