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LON - ONT

$408 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 4/2. 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.
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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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Cheap Flight Deals 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.

Recent round-trip flight deals from London to Ontario

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from London to Ontario.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
6:30 am - 9:58 pmLHR-ONT
23h 28m2 stops
1:20 pm - 7:25 amONT-LHR
34h 05m1 stop
$506United Airlines
Find Deal
Sat, Apr 19 - Sat, Apr 26
9:30 am - 8:21 pmLHR-ONT
18h 51m2 stops
6:10 am - 6:45 amONT-LHR
16h 35m2 stops
$516United Airlines
Find Deal
Wed, Apr 23 - Wed, Apr 30
12:45 pm - 9:59 pmLHR-ONT
16h 14m1 stop
1:40 pm - 9:40 amONT-LHR
13h 00m1 stop
$522Lufthansa
Find Deal
Thu, Mar 13 - Tue, Mar 18
12:45 pm - 9:59 pmLHR-ONT
16h 14m1 stop
1:35 pm - 9:40 amONT-LHR
12h 05m1 stop
$527Lufthansa
Find Deal
Sat, Mar 29 - Mon, Apr 7
10:55 am - 4:33 pmLHR-ONT
13h 38m1 stop
7:00 am - 6:45 amONT-LHR
15h 45m1 stop
$530Virgin Atlantic
Find Deal
Sat, Apr 19 - Sun, Apr 27
1:40 pm - 9:58 pmLHR-ONT
16h 18m1 stop
6:10 am - 7:40 amONT-LHR
17h 30m1 stop
$538
Find Deal
Wed, Apr 23 - Wed, Apr 30
1:25 pm - 10:42 pmLHR-ONT
17h 17m1 stop
1:10 pm - 4:15 pmONT-LHR
19h 05m2 stops
$553Virgin Atlantic
Find Deal
Mon, Apr 21 - Tue, May 13
2:10 pm - 10:27 pmLHR-ONT
15h 17m1 stop
4:30 pm - 11:50 amONT-LHR
12h 20m1 stop
$563British Airways
Find Deal
Thu, Mar 13 - Sat, Mar 29
2:10 pm - 10:27 pmLHR-ONT
15h 17m1 stop
4:30 pm - 11:50 amONT-LHR
12h 20m1 stop
$572British Airways
Find Deal
Thu, Mar 13 - Sat, Mar 29
10:35 am - 5:56 pmLHR-ONT
15h 21m1 stop
6:10 am - 7:40 amONT-LHR
17h 30m1 stop
$622
Find Deal
Sat, Apr 19 - Sat, Apr 26

Flights from London to Ontario - Travel Insights & Trends

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.

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 January, where tickets cost $557 (return) on average. On the other hand, the most expensive months are August and July, where the average cost of round-trip tickets is $1,125 and $931 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 22 weeks before departure.

Good to know

Low season

January

High season

September

Cheapest flight

$408
Best time to beat the crowds with an average 25% drop in price.
Most popular time to fly and prices are also 18% 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 $408 for a one-way ticket and $506 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?

    Star Alliance, SkyTeam, and oneworld are the airline alliances operating flights between London and Ontario, with SkyTeam 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.

See more FAQs

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

Information on your arrival and departure airports

Ontario (ONT)

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