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$523 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 9/24. 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
jue. 7/11
jue. 7/18

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 44,212,782 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 $660. 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 $577.

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 13m, Edinburgh, which takes 13h 40m, and Manchester, which takes 14h 25m.

How many direct flights to Ontario are there each day?

There are around 107 direct flights from within United Kingdom to Ontario every day. Most flights depart in the morning, with 11:00 am the most common departure time and 43% of flights departing in the morning.

How many direct flights to Ontario are there each week?

Each week there are around 743 direct flights from within United Kingdom to Ontario. The most common day for departures is Friday, with 17% of flights taking off on this day.

Good to know

Low season

January

High season

April

Cheapest flight

$523
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 300 per week, followed by Frontier with 122 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.
6.7
British AirwaysOverall score based on 6743 reviews
6.4Food
6.8Comfort
7.7Crew
7.0Boarding
6.5Entertainment
Airline reviews

Every host and pilot were very professional. My next flight would be upgraded from economy to the next group.

10.0 ExcellentAnonymous, Jun 2024LHR - JFK
Read more about British Airways reviews

Every host and pilot were very professional. My next flight would be upgraded from economy to the next group.

I asked for a window seat and when I got on the plane 24A did not have a window so was very not happy, but good and entertainment was good and the staff was very good, so the only complaint was the seating.

My seat was in a good row. In our section it was the first row. But it was difficult tooperate seat entertainment features > table, screen, even though I often fly.

My worst flying experience so far. This flight was delayed a total of 42 hours and diverted to New York before it was finally cancelled. It was delayed 4 and a half hours in London. As we were scanning our boarding passes at the gate they advised that the flight was being diverted to JFK since the delays caused us to missed the open hours for Charlotte international customs and immigration. We were assured multiple times by airport personnel, flight attendants, and the Pilot that we would land at JFK go through customs and immigration and then reboard the plane to fly to Charlotte in the same night. When we landed in New York the pilot advised us as we were retrieving our carry on luggage that we were delayed till 10am the next morning and to see guest services to get a room for the night. During this time I had to purchase a room for a family member in Charlotte which drove over 4 and a half hours to pick us up from Charlotte. This could have been avoided if American Airlines had been up front about the delay. Then after standing in line for over 2 and a half hours at guest services we were taken by taxi to a hotel 30 minutes out of the way. Luckily I looked for other flights that night and found one at 8 am to get on. The initial flight which we were scheduled to fly to charlotte in was delayed 12 more times and was finally cancelled 42 hours after it was supposed to land. I am unaware of what happened to the guest that were supposed to fly on the flight after we were placed on another flight but 42 hours in delays for a direct flight is absolutely ridiculous.

The boarding to Gatwick was a breeze but the boarding from Gatwick was a nightmare. The onboard service to Gatwick had a lot to be desired but the onboard sevice from Gatwick was amazing ! Very nice,friendly and funny ! Would I recommend BA to anyone.? ! Yes I would!

Really quick check in and security at Heathrow Terminal 5. Staff on board were lovely and very friendly. Could have provided a few more drinks on the flight but they were available at the back of the plane.

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.

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.
9/24mar.
1 stopFinnair
16h 02mLHR-ONT
10/8mar.
1 stopFinnair
14h 25mONT-LHR
$523
11/5mar.
1 stopBritish Airways
13h 57mLHR-ONT
11/12mar.
1 stopBritish Airways
12h 54mONT-LHR
$533
9/9lun.
2 stopsIberia
20h 26mLHR-ONT
9/24mar.
1 stopIberia
15h 50mONT-LHR
$541
11/5mar.
1 stopKLM
18h 54mLHR-ONT
11/12mar.
1 stopKLM
15h 40mONT-LHR
$555
9/18mié.
1 stopAmerican Airlines
14h 57mLHR-ONT
9/25mié.
1 stopAmerican Airlines
13h 54mONT-LHR
$569
9/25mié.
1 stop
16h 02mLHR-ONT
10/5sáb.
1 stop
14h 01mONT-LHR
$575
9/9lun.
2 stopsIberia
20h 26mLHR-ONT
9/21sáb.
1 stopIberia
14h 15mONT-LHR
$580
10/29mar.
2 stopsAmerican Airlines
27h 37mLGW-ONT
11/5mar.
2 stopsAmerican Airlines
17h 17mONT-LGW
$599
11/30sáb.
1 stopKLM
13h 27mLHR-ONT
2/22sáb.
1 stopKLM
14h 31mONT-LHR
$617
9/10mar.
2 stops
20h 40mLHR-ONT
9/25mié.
2 stops
18h 35mONT-LHR
$620

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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.
9/14sáb.
1 stopIberia
17h 14mLHR-ONT
$571
10/31jue.
1 stop
34h 27mLHR-ONT
$609
9/10mar.
1 stopJetBlue
19h 51mLGW-ONT
$737
8/28mié.
1 stopJetBlue
20h 02mLGW-ONT
$751
9/9lun.
1 stopIcelandair
19h 51mLGW-ONT
$755
8/20mar.
1 stopIcelandair
20h 02mLGW-ONT
$777
11/8vie.
1 stopBritish Airways
17h 48mLHR-ONT
$808
7/1lun.
1 stopFinnair
21h 44mLHR-ONT
$811
11/5mar.
2 stopsBritish Airways
17h 12mMAN-ONT
$1,567
7/14dom.
2 stopsFinnair
37h 10mMAN-ONT
$1,938

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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.
6/16dom.
multi-stopFinnair
14h 57mLHR-ONT
6/23dom.
multi-stopFinnair
22h 26mONT-LHR
$920
6/12mié.
multi-stopJetBlue
18h 14mLHR-ONT
6/26mié.
multi-stopJetBlue
25h 31mONT-LHR
$1,029
6/12mié.
multi-stopIcelandair
19h 39mLGW-ONT
6/19mié.
multi-stopIcelandair
23h 56mONT-LGW
$1,030
6/15sáb.
multi-stopIcelandair
23h 13mLHR-ONT
6/22sáb.
multi-stopIcelandair
25h 31mONT-LHR
$1,041
6/16dom.
multi-stopUnited Airlines
14h 23mLHR-ONT
6/23dom.
multi-stopUnited Airlines
14h 51mONT-LHR
$1,071
6/12mié.
multi-stopAmerican Airlines
19h 29mLGW-ONT
6/19mié.
multi-stopAmerican Airlines
31h 34mONT-LGW
$1,106
6/12mié.
multi-stopUnited Airlines
14h 23mLHR-ONT
6/26mié.
multi-stopUnited Airlines
14h 51mONT-LHR
$1,118
6/12mié.
multi-stopAmerican Airlines
19h 29mLGW-ONT
6/26mié.
multi-stopAmerican Airlines
18h 10mONT-LGW
$1,120
6/12mié.
multi-stopBritish Airways
14h 57mLHR-ONT
6/16dom.
multi-stopBritish Airways
24h 01mONT-LHR
$1,165
6/15sáb.
multi-stopBritish Airways
18h 17mLHR-ONT
6/21vie.
multi-stopBritish Airways
24h 06mONT-LHR
$1,241

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Flights to Ontario

Destination:

Ontario (ONT)United States

Return flight deals:

Ontario - United Kingdom

Cabin classes: