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ONT - LON

£272 Find cheap flights from Ontario to London

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 London departing on 29/7. 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
0 bags
Tue 11/6
Tue 18/6

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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
In the last 7 days, travellers have searched 42,369,914 times on KAYAK, and here's why:

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Cheap flight deals from Ontario to London (ONT-LON)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to London 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 and deals for you by selecting your travel dates.
Choose your dates
08:41 - 08:10ONT-LGW
15h 29m2 stops
10:15 - 21:44LGW-ONT
19h 29m2 stops
£477American Airlines
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Mon, 23 Sep - Tue, 8 Oct
20:35 - 10:35ONT-LGW
30h 00m1 stop
12:00 - 18:09LGW-ONT
14h 09m1 stop
Mon, 23 Sep - Tue, 8 Oct
12:45 - 14:25ONT-LHR
17h 40m1 stop
09:15 - 23:26LHR-ONT
22h 11m2 stops
£488Iberia
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Sun, 22 Sep - Tue, 1 Oct
13:35 - 12:20ONT-LHR
14h 45m1 stop
11:05 - 17:17LHR-ONT
14h 12m1 stop
£496United Airlines
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Tue, 24 Sep - Tue, 8 Oct
06:00 - 10:00ONT-LHR
20h 00m1 stop
06:20 - 16:53LHR-ONT
18h 33m2 stops
£497Delta
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Tue, 5 Nov - Tue, 26 Nov
07:00 - 10:30ONT-LHR
20h 30m2 stops
06:20 - 18:03LHR-ONT
19h 43m2 stops
£500Delta
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Tue, 29 Oct - Fri, 8 Nov
08:41 - 06:25ONT-LHR
13h 44m1 stop
16:25 - 23:26LHR-ONT
15h 01m1 stop
£501British Airways
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Mon, 23 Sep - Tue, 1 Oct
18:45 - 20:40ONT-LHR
17h 55m2 stops
11:05 - 22:56LHR-ONT
19h 51m2 stops
£505United Airlines
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Mon, 23 Sep - Tue, 8 Oct
10:50 - 08:00ONT-LHR
13h 10m1 stop
09:15 - 23:26LHR-ONT
22h 11m2 stops
£516Iberia
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Sun, 22 Sep - Wed, 2 Oct
10:50 - 10:40ONT-LHR
15h 50m1 stop
13:05 - 21:42LHR-ONT
16h 37m1 stop
£541British Airways
Find Deal
Thu, 19 Sep - Fri, 4 Oct

Flights from Ontario to London - Travel Insights & Trends

Get data-powered insights and trends into flights from Ontario to London 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 Ontario to London?

The average price of all flights from Ontario to London clicked on KAYAK for each day over the last 12 months.
Your flight ticket price will generally be cheaper if you fly to London on a Tuesday and more expensive on a Thursday. On your return trip to Ontario, you should consider flying back on a Wednesday, and avoid Sundays for better deals.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Ontario to London, 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 is October, where tickets cost £486 on average. On the other hand, the most expensive months are June and July, where the average cost of tickets is £826 and £762 respectively.

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

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Ontario to London, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from Ontario to London, you should book around 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 14 days before departure.

Which airlines provide the cheapest flights from Ontario to London?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
The best deals for a one-way ticket found by KAYAK users over the last 3 days were on United Airlines (£362) and Delta (£370). The cheapest round-trip tickets were found on American Airlines (£477) and Iberia (£488).

Good to know - Cheap tickets from Ontario to London

Low season

January

High season

June

Cheapest flight

£272
Best time to beat the crowds (18% less expensive on average)
Most popular time to fly (48% more expensive on average)
Flight from Ontario to London Gatwick Airport

When to book flights from Ontario to London

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

  • How can I get to the city center by public transport after my flight from Ontario to London?

    Upon arrival at London Heathrow Airport from Ontario, you can easily reach the city center using public transportation. Take the Heathrow Express train to Paddington Station, which operates every 15 minutes. From Paddington, you can transfer to the London Underground and take the Bakerloo Line or Circle Line to reach the city center.

  • Can I pre-book my seat on WestJet flights from Ontario to London?

    Yes, you can pre-book your seat on WestJet flights from Ontario to London. WestJet offers the option to select your preferred seat in advance, allowing you to secure your desired seating arrangement for a more comfortable journey. By accessing their online booking portal or contacting their customer service, you can make seat reservations according to your preferences and availability.

  • Which kid-friendly amenities does WestJet have on flights from Ontario to London?

    WestJet offers several kid-friendly amenities on flights from Ontario to London. These amenities include children's entertainment options such as movies, TV shows, and games suitable for different age groups. They also provide complimentary activity packs with coloring books, crayons, and puzzles to keep young travelers engaged during the flight.

  • What are the baggage restrictions when flying Virgin Atlantic from Ontario to London?

    The baggage restrictions when flying Virgin Atlantic from Ontario to London include a checked baggage allowance of two pieces weighing up to 50 lbs each in Economy class. Additionally, passengers are allowed one carry-on bag weighing up to 22 lbs and one personal item such as a laptop or handbag.

  • What is the cheapest flight from Ontario to London?

    In the last 3 days, the lowest price for a flight from Ontario to London was £341 for a one-way ticket and £597 for a return.

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

    When flying out of Ontario you will be using Ontario. You will be landing at one of these airports: London Gatwick or London Heathrow.

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

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

  • Which airline alliances offer flights from Ontario to London?

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

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

    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.

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

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

    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 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?

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

See more FAQs

Top tips for finding a cheap flight from Ontario to London

  • Common layover options for Air Canada flights from Ontario (ONT) to London (LON) may include stopovers in major hub cities such as Toronto, Montreal, or Ottawa. These layovers often provide convenient connections for passengers, allowing them to change planes and continue their journey to London.
  • Additionally, Air Canada offers a special food service called "Chef's Menu" on its flights from Ontario to London. Passengers can enjoy a delectable selection of culinary delights prepared by renowned chefs. The menu features a range of gourmet dishes using fresh, locally sourced ingredients, ensuring a delightful dining experience in the skies. From appetizers to main courses and desserts, Air Canada's Chef's Menu promises to satisfy the taste buds of travelers throughout their journey.
  • Air Canada offers a variety of in-flight entertainment options on its flights from Ontario to London. Passengers can enjoy a selection of movies, TV shows, and music, with a wide range of genres to choose from. Additionally, the airline provides personal screens with touch controls, offering a seamless and enjoyable viewing experience.
  • WestJet assists passengers with disabilities traveling from Ontario to London. They offer wheelchair assistance, accessible seating options, and priority boarding. Passengers can request special services such as mobility aids or medical equipment during their journey. WestJet's trained staff is available to ensure a comfortable and safe travel experience for passengers with disabilities, addressing their specific needs and providing necessary support throughout the journey.
  • You can change your seat when flying with WestJet from Ontario to London. Seat changes are subject to availability, and you can make the change either during the booking process or by accessing your reservation online. Alternatively, you can contact WestJet's customer service for assistance with seat changes.
See more tips

Book cheap flights from Ontario to London

Cheapest flights to London from Ontario found in 2024

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Ontario to London found on KAYAK in the last 72 hours.
29/7Mon
3 stops
48h 01mONT-LGW
£272
28/7Sun
3 stops
37h 08mONT-LGW
£297
22/9Sun
1 stopUnited Airlines
12h 05mONT-LHR
£362
6/10Sun
1 stopUnited Airlines
15h 37mONT-LHR
£365
29/9Sun
2 stopsDelta
20h 00mONT-LGW
£370
5/10Sat
2 stopsDelta
33h 00mONT-LGW
£384
25/9Wed
1 stopKLM
12h 18mONT-LHR
£389
16/9Mon
1 stopJetBlue
13h 09mONT-LHR
£393
27/9Fri
1 stopKLM
12h 18mONT-LHR
£429
12/9Thu
1 stopJetBlue
13h 09mONT-LHR
£433

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Last minute flights from Ontario to London

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Ontario to London that are departing in the next 10 days.
13/5Mon
multi-stopUnited Airlines
14h 44mONT-LHR
28/5Tue
multi-stopUnited Airlines
14h 14mLHR-ONT
£612
15/5Wed
multi-stopBritish Airways
14h 12mONT-LHR
31/5Fri
multi-stopBritish Airways
23h 16mLHR-ONT
£639
15/5Wed
multi-stopAir Canada
17h 15mONT-LHR
31/5Fri
multi-stopAir Canada
18h 24mLHR-ONT
£753
16/5Thu
multi-stopIberia
13h 25mONT-LHR
29/5Wed
multi-stopIberia
15h 31mLHR-ONT
£757
17/5Fri
multi-stopKLM
12h 40mONT-LHR
23/5Thu
multi-stopKLM
13h 41mLHR-ONT
£773
16/5Thu
multi-stopIberia
13h 25mONT-LHR
21/5Tue
multi-stopIberia
15h 31mLHR-ONT
£776
17/5Fri
multi-stopAmerican Airlines
18h 35mONT-LGW
31/5Fri
multi-stopAmerican Airlines
20h 24mLGW-ONT
£783
17/5Fri
multi-stopKLM
12h 40mONT-LHR
22/5Wed
multi-stopKLM
13h 36mLHR-ONT
£808
17/5Fri
multi-stopAmerican Airlines
14h 12mONT-LHR
31/5Fri
multi-stopAmerican Airlines
16h 17mLHR-ONT
£812
13/5Mon
multi-stopAir Canada
17h 15mONT-LHR
20/5Mon
multi-stopAir Canada
44h 23mLHR-ONT
£7,222

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Ontario - London Flights

Departure:

Ontario (undefined)United States

Return flight deals:

London - Ontario

Cabin classes: