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$534 Find cheap flights from the United Kingdom to Ontario

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight to Ontario departing on 11/5. 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
Sat 6/22
Sat 6/29

Search 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
In the last 7 days travelers have searched 43,800,826 times on KAYAK, and here is why:

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Flights to Ontario - Travel Insights & Trends

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 day to fly to Ontario?

The average price of all flights to Ontario clicked on KAYAK for each day over the last 12 months.
Based on KAYAK data, the cheapest day to fly to Ontario is Tuesday where tickets can be as cheap as $666. On the other hand, the most expensive day to fly is Friday, where prices are $1,388 on average.

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 November, where tickets cost $567 on average for one-way flights. On the other hand, the most expensive months are August and July, where the average cost of tickets from the United Kingdom is $1,478 and $1,117 respectively. For return trips, the best month to travel is November with an average price of $578.

What is the cheapest time of day to fly to Ontario?

The average price for all flights to Ontario depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.
The cheapest time of day to fly to Ontario is generally in the evening, when flights cost $624 on average. The most expensive time of day to fly to Ontario is generally in the morning, which is peak travel time and where the average cost of a ticket is $762.

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

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights to Ontario, 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, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 58 days before departure.

How long is the flight to Ontario?

The duration of your flight to Ontario depends on your departure and arrival airports. Obviously any flights that include a layover will also be longer. The most popular routes to Ontario on KAYAK are from London, which takes 13h 45m, Manchester, which takes 14h 25m, and Edinburgh, which takes 15h 05m.

How many direct flights to Ontario are there each day?

There are around 125 direct flights from within United Kingdom to Ontario every day. Most flights depart in the morning, with 5:00 pm the most common departure time and 42% of flights departing in the morning.

How many direct flights to Ontario are there each week?

Each week there are around 875 direct flights from within United Kingdom to Ontario. The most common day for departures is Monday, with 16% of flights taking off on this day.

Good to know

Low season

January

High season

April

Cheapest flight

$534
Best time to beat the crowds with an average 14% drop in price.
Most popular time to fly and prices are also 16% lower on average.
Flight from London Heathrow Airport to Ontario

FAQs - booking Ontario flights

  • How far is Ontario from central Ontario?

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

  • What is the name of Ontario’s airport?

    All flights to Ontario land at Ontario. 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.

  • Which airline offers the most flights to Ontario?

    Of the 8 airlines that fly to Ontario, Southwest offers the most flights, with around 377 per week, followed by Delta with 125 flights per week.

See more FAQs

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.

Prefer to fly non-stop to Ontario?

Find which airlines fly direct to Ontario, which days they fly and book direct flights.

Nonstop departures

United Kingdom to Ontario

Monday

Aeromexico, Air Canada, Air France, +23 more

Aeromexico, Air Canada, +24 more

Tuesday

Aeromexico, Air Canada, Air France, +24 more

Aeromexico, Air Canada, +25 more

Wednesday

Aeromexico, Air Canada, Air France, +23 more

Aeromexico, Air Canada, +24 more

Thursday

Aeromexico, Air Canada, Air France, +24 more

Aeromexico, Air Canada, +25 more

Friday

Aeromexico, Air Canada, Air France, +22 more

Aeromexico, Air Canada, +23 more

Saturday

Aeromexico, Air Canada, Air France, +23 more

Aeromexico, Air Canada, +24 more

Sunday

Aeromexico, Air Canada, Air France, +24 more

Aeromexico, Air Canada, +25 more

See more direct flights

Nonstop returns

Ontario to United Kingdom

Monday

Aeromexico, Air Canada, Air France, +23 more

Aeromexico, Air Canada, +24 more

Tuesday

Aeromexico, Air Canada, Air France, +24 more

Aeromexico, Air Canada, +25 more

Wednesday

Aeromexico, Air Canada, Air France, +23 more

Aeromexico, Air Canada, +24 more

Thursday

Aeromexico, Air Canada, Air France, +24 more

Aeromexico, Air Canada, +25 more

Friday

Aeromexico, Air Canada, Air France, +22 more

Aeromexico, Air Canada, +23 more

Saturday

Aeromexico, Air Canada, Air France, +23 more

Aeromexico, Air Canada, +24 more

Sunday

Aeromexico, Air Canada, Air France, +24 more

Aeromexico, Air Canada, +25 more

See more direct flights
See more direct flights

Top airline flying from the United Kingdom to Ontario

 
See real verified KAYAK customer reviews for airlines flying to Ontario. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from the United Kingdom to Ontario. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with to Ontario? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
6.8
British AirwaysOverall score based on 6794 reviews
6.5Entertainment
7.7Crew
7.0Boarding
6.8Comfort
6.4Food
Airline reviews

It was a flight operated by Aer Linus for BA and the plane and crew were very good but the food selection was average.

8.0 ExcellentAnonymous, May 2024MAN - MCO
Read more about British Airways reviews

It was a flight operated by Aer Linus for BA and the plane and crew were very good but the food selection was average.

Flight delayed an hour due to plane maintenance issues after getting in line to board. Issue was plane galley ovens which eliminated hot meals for overseas flight. Cold selections were limited due to availability. Drink and meal service (already an hour delayed) was very slow. Upon arrival in Nashville, had to sit at gate for about 15 minutes before disembarking with no explanation. Local police then boarded plane as we were disembarking so maybe that was the issue.

Boarding good. Seats uncomfortable when lie flat. Food was awful. Tasted stale and chicken was dry. No live tv or flight map. Had to pay for internet.

Poor technical details on this plane. 1) There was no WiFi on an 8 hour long-haul flight. So no work could be done. That's below the standard expected for airlines these days. 2) The power outlet at my seat was busted and not working. 3) The headphone jack was loose and I had to keep adjusting my headphones to get good reception, or when it slipped out. - The flight was delayed to due mechanics. Sometimes this can't be avoided, I understand, and it's a big inconvenience to arrive that much later when traveling across time zones (then arriving at 4am from the prior time zone). - Also unique to this flight, the northern lights were visible on the right side of the aircraft, but I only found out after we landed (b/c again no wifi). I understand there are considerations about people being out of their seats to look, but I feel extremely disappointed and resentful that I wasn't told so that I could have a chance to look at this probably once-in-a-lifetime cosmic event from a view in the sky. - Flight crew was otherwise friendly and helpful.

I would have preferred something lighter for the second meal. Maybe a small sandwich .

They cancelled our flight the morning of departure at 4:30am.

Coach seats are too tight. Seem designed for small people. Food different but OK. Staff helpful.

my original flight was cancelled the previous day, and i was rescheduled onto this flight, which left much earlier in the morning, impacting my previous evening and requiring me to get up much earlier in the morning to get to the airport online. This practice happens way way way too much, and it seems on every airline, though AA is probably the worst.

The crew was very attentive and kept busy serving a variety of treats!

Offered vegetable curry when it was actually tofu which I don’t care for.

Book cheap flights from the United Kingdom to Ontario

Recent round-trip flight deals

 
These are the cheapest round-trip flights to Ontario found on KAYAK in the last 72 hours.
11/5Tue
1 stopBritish Airways
15h 08mLHR-ONT
11/19Tue
1 stopBritish Airways
12h 54mONT-LHR
$534
11/5Tue
2 stopsIberia
24h 32mLHR-ONT
11/19Tue
1 stopIberia
16h 46mONT-LHR
$541
11/5Tue
2 stopsDelta
19h 43mLHR-ONT
11/19Tue
2 stopsDelta
17h 05mONT-LHR
$549
10/30Wed
1 stopVirgin Atlantic
13h 28mLHR-ONT
12/3Tue
1 stopVirgin Atlantic
12h 18mONT-LHR
$584
11/5Tue
2 stopsDelta
19h 43mLHR-ONT
11/15Fri
2 stopsDelta
18h 55mONT-LHR
$587
9/16Mon
1 stopUnited Airlines
15h 51mLHR-ONT
9/26Thu
1 stopUnited Airlines
12h 10mONT-LHR
$613
9/18Wed
1 stopUnited Airlines
15h 51mLHR-ONT
10/2Wed
1 stopUnited Airlines
12h 10mONT-LHR
$622
11/2Sat
1 stopVirgin Atlantic
13h 28mLHR-ONT
11/9Sat
1 stopVirgin Atlantic
12h 18mONT-LHR
$661
9/2Mon
1 stopAmerican Airlines
14h 48mLHR-ONT
9/30Mon
1 stopAmerican Airlines
29h 10mONT-LHR
$672
9/9Mon
1 stopAmerican Airlines
14h 45mLHR-ONT
9/14Sat
1 stopAmerican Airlines
24h 30mONT-LHR
$717

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Recent one-way flight deals

 
Only flying one-way? Below are some of the best deals for one-way flights to Ontario found on KAYAK in the last 72 hours.
9/4Wed
3 stops
35h 22mLHR-ONT
$594
9/4Wed
3 stops
30h 32mLGW-ONT
$614
9/11Wed
1 stopJetBlue
19h 35mLGW-ONT
$733
9/17Tue
1 stopJetBlue
19h 51mLGW-ONT
$734
9/4Wed
1 stopIberia
16h 37mLHR-ONT
$786
7/13Sat
1 stopFinnair
16h 20mLHR-ONT
$812
9/21Sat
2 stopsFinnair
21h 27mBHX-ONT
$1,366
9/24Tue
2 stopsBritish Airways
18h 11mEDI-ONT
$1,552
8/21Wed
2 stopsIberia
20h 59mLGW-ONT
$1,581
8/20Tue
2 stopsBritish Airways
17h 43mLCY-ONT
$1,591

Search by stops

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Last minute flights to Ontario

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 to Ontario that are departing in the next 10 days.
5/27Mon
multi-stopUnited Airlines
14h 23mLHR-ONT
6/3Mon
multi-stopUnited Airlines
14h 51mONT-LHR
$1,121
5/28Tue
multi-stopAmerican Airlines
32h 54mLHR-ONT
7/14Sun
multi-stopAmerican Airlines
24h 01mONT-LHR
$1,123
5/28Tue
multi-stopAmerican Airlines
20h 26mLHR-ONT
7/14Sun
multi-stopAmerican Airlines
19h 14mONT-LHR
$1,125
5/26Sun
multi-stopFinnair
15h 31mLHR-ONT
6/18Tue
multi-stopFinnair
14h 01mONT-LHR
$1,162
5/25Sat
multi-stopDelta
21h 58mLHR-ONT
5/31Fri
multi-stopDelta
20h 15mONT-LHR
$1,201
5/24Fri
multi-stopBritish Airways
15h 31mLHR-ONT
5/26Sun
multi-stopBritish Airways
22h 26mONT-LHR
$1,202
5/25Sat
multi-stopFinnair
16h 08mLHR-ONT
6/1Sat
multi-stopFinnair
14h 12mONT-LHR
$1,212
5/24Fri
multi-stopIberia
15h 03mLHR-ONT
5/26Sun
multi-stopIberia
13h 31mONT-LHR
$1,217
5/24Fri
multi-stopIberia
15h 03mLHR-ONT
5/26Sun
multi-stopIberia
13h 31mONT-LHR
$1,218
5/28Tue
multi-stopBritish Airways
15h 31mLHR-ONT
6/4Tue
multi-stopBritish Airways
14h 12mONT-LHR
$1,258

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Flights to Ontario

Destination:

Ontario (ONT)United States

Return flight deals:

Ontario - United Kingdom

Cabin classes: