ONT

£306 Find Cheap Flights 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 to Ontario departing on 20/2. 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.
1 adult

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These are the airlines KAYAK users have selected most often from within our search results for flights to Ontario
These are the airlines KAYAK users have selected most often from within our search results for flights to Ontario
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Cheap Flight Deals to Ontario

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights 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 return flight deals to Ontario

Recommended return deals departing in the coming months from the most popular airlines that fly to Ontario.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
09:30 - 09:51LHR-ONT
32h 21m2 stops
06:00 - 11:05ONT-LHR
21h 05m1 stop
£404United Airlines
Find Deal
Tue, 4 Feb - Tue, 11 Feb
09:30 - 21:57LHR-ONT
20h 27m2 stops
06:00 - 09:40ONT-LHR
19h 40m2 stops
£405United Airlines
Find Deal
Wed, 12 Feb - Wed, 19 Feb
13:50 - 22:45LHR-ONT
16h 55m1 stop
14:54 - 12:05ONT-LHR
13h 11m1 stop
£420Finnair
Find Deal
Tue, 11 Feb - Wed, 26 Feb
07:40 - 20:57LHR-ONT
21h 17m2 stops
06:00 - 09:40ONT-LHR
20h 40m2 stops
£436Lufthansa
Find Deal
Sat, 8 Mar - Thu, 20 Mar
13:50 - 22:45LHR-ONT
16h 55m1 stop
14:54 - 12:05ONT-LHR
13h 11m1 stop
£452Finnair
Find Deal
Wed, 12 Feb - Sun, 16 Feb
10:40 - 19:01LHR-ONT
15h 21m1 stop
14:54 - 12:05ONT-LHR
14h 11m1 stop
£454British Airways
Find Deal
Wed, 19 Mar - Thu, 27 Mar
14:30 - 22:00LHR-ONT
14h 30m1 stop
16:30 - 12:50ONT-LHR
12h 20m1 stop
£455British Airways
Find Deal
Tue, 11 Mar - Wed, 2 Apr
10:05 - 20:10LHR-ONT
17h 05m1 stop
05:00 - 09:40ONT-LHR
20h 40m1 stop
£470Lufthansa
Find Deal
Mon, 24 Mar - Mon, 14 Apr
13:05 - 23:26LHR-ONT
42h 21m2 stops
13:21 - 07:05ONT-LHR
33h 44m2 stops
£491Virgin Atlantic
Find Deal
Sat, 15 Feb - Sat, 22 Feb
13:25 - 22:40LHR-ONT
17h 15m1 stop
11:29 - 11:25ONT-LHR
15h 56m1 stop
£507Virgin Atlantic
Find Deal
Wed, 23 Apr - Wed, 30 Apr

Flights to Ontario - Travel Insights & Trends

Get data-powered insights and trends into 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 round-trip 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 round-trip tickets can be as cheap as £562. On the other hand, the most expensive day to fly is Friday, where round-trip prices are £722 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 January, where tickets cost £473 on average for return flights. On the other hand, the most expensive months are August and December, where the average cost of tickets from the United Kingdom is £913 and £740 respectively. For one-way flights, the best month to travel is November with an average price of £545.

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

The average price for all round-trip 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 at night, when round-trip flights cost £526 on average. The most expensive time of day to fly to Ontario is generally in the afternoon, which is peak travel time and where the average cost of a ticket is £618.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights 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, 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 - Cheap tickets to Ontario

Low season

January

High season

April

Cheapest flight

£306
Best time to beat the crowds (9% less expensive on average)
Most popular time to fly and prices are also 14% lower on average.
Flight from London Gatwick Airport to Ontario

When to book flights to Ontario

Are your dates flexible? Find out the best times to travel to Ontario 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. The information is for flights to Ontario based on your location. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs - booking Ontario flights

  • How far is Ontario Airport from central Ontario?

    Central Ontario is 3 miles away from Ontario Airport.

  • What is the name of Ontario’s airport?

    Ontario is served by Ontario Airport, also commonly referred to as Ontario or Ontario Intl. The airport code is ONT.

  • 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 travellers 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.

See more FAQs

Top tips for finding cheap flights to Ontario

  • Book at least 1 week before departure in order to get a below-average price for flights to Ontario.
  • High season is considered to be June, July and August. The cheapest month to fly from the United Kingdom is January.
  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest Ontario flight deals.

Top 5 airlines flying 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.
7.6
FinnairOverall score based on 1285 reviews
7.5Comfort
6.9Entertainment
6.7Food
8.1Crew
7.7Boarding
Airline reviews

Boarding uncomfortable. Stewardess said I would have to check my carry on as there was no room in the overhead bins. Another passenger helped me find a spot.

8.0 ExcellentAnonymous, Jan 2025DFW - CVG
Read more Finnair reviews

Boarding uncomfortable. Stewardess said I would have to check my carry on as there was no room in the overhead bins. Another passenger helped me find a spot.

Any flight that lands safely is a good flight. However our leg from Helsinki was delayed 1 hour with no explanation. The delay would not allow us to make our connection to Cincinnati. I was informed by American Airlines that our Cincinnati flight was rescheduled for the following day. I immediately made a non refundable hotel reservation in Dallas. Upon exiting the plane at Dallas I was given a hotel voucher. Nice, but I can't get a refund on the hotel I booked. A little communication would have been helpful. Food on Finnair is below quality of Korean Air.

The cabin crew really looked like they wanted to be somewhere else. They weren't really interested in providing an attentive service to full fare paying passengers at all. However the Captiain's in flight announcements were relaxed and very entertaining.

Crew were professional and responsive. Food was mediocre and breakfast could do with revampinmg

Food was very ordinary for premium economy, very small portions.

i dont know WHY they call it business class. the seats are NOT significantly wider than economy seats, they just do not let the middle seats be beepked to give the illusion of more space between passengers. the seats do NOT recline any more than economy seats either. the only real difference is the full meal served to business (vs none for economy). I would rather have a wider, lie flat ACTUAL business class seat with no food for a 3 hr flight. this was pretty disappointing to say the least.

There wore nice leather like sits, in my opinion seats lay out bit tight . Crew was great they did averything possible to make averywone comfortable as possible, food was, think worst I ever head on flight, head chicken and yellow rice. Ice cream was a nic treat.

Our previous flight was delayed but they waited for us to board.

Flight was delayed, short time connection to next flight but we make it, service was good, worth to fly just to try thair on board blueberry juce. Eccelent communication with airline.

My American Airlines flight was deleted and you guys never let me know

We had an unfortunate experience where we had to leave the aircraft after boarding, shortly before the scheduled takeoff time, and re-board. The reason given was that a passenger felt ill and had to cancel their plans and therefor their luggage had to be found and removed.

We’ve used VA before many times the experience is always been good they have lovely staff and the food is always delicious.

Everything about the flight was amazing from check in to boarding entertainment was okay food we didn’t try.

Seats were old and dirty, for a long haul flight you expect to be able to recline and for the av to work properly. Choice for vegans was fruit….

The Virgin Atlantic crew was very good. However, the equipment was OK, the seats were OK, but her bags did not arrive with me. Two bags showed up a day later and I’m still waiting for my third back.

The crew was very good. However, the equipment was a bit dated. Some of the electronics were not working. To top it, three bags didn’t arrive with me. Two of them were delivered a day later. I’m still waiting for the third bag, I was so looking forward to this virgin Atlantic flight, but, I am disappointed.

My only complaint is that the pocket in front of me was ripped and my things, like iPad and airline magazines, kept slipping to the floor.

Flight delayed yet again. Crew apathetic and unhelpful re affect on connecting flight.

I think Virgin is one of the best flying experiences, especially from/to the UK. The staff are so helpful and fun, the food is good, seats comfortable, goof entertainment and great value. Check in and boarding is pretty pain free. I also find that the other passengers are generally so kind and considerate than when I've flown other airlines.

Cabin crew on our flight showed lack of any customer service gruff and acting annoyed if you asked anything and I mean anything Example a man on the seat over dropped his beer on my husbands blanket We asked if we could switch out blankets cabin crew Said. No we don’t have any extras OK well can you take the wet one Cabin crew looked disgusted and annoyed Took it no OK or yes just a growl

I feel bad, but Swiss airlines is not an airlines I will ever fly again. Their cabins are basic, seats are extremely uncomfortable, crew is a hit or a miss with service. What's worse is how they make you feel they are there to make money and not make your travel needs be met or make your travel a pleasure. They charge for 2nd bags, seat selection and felt like a budget arinines frontier/spirit airline attitude and approach. Their business class is from the early 2000s, basic. Additionally, planes going to India, are old, falling apart and not maintained. Even the crew mentioned this is typical of the airline having older planes going to India. Panels detached and loose or stuck with duct tape, seats scruffed up and dirty, seatbelts roughed up. The scariest thing was when I saw a window panel next to where I was sitting loose and dangling. The crew mentioned it's only cosmetic and assured the integrity of the plane was inspected by the maintenance crew. This is where they confessed about planes going to India being old. I UNFORTUNATELY would NOT recommend Swiss airlines to anyone and will NEVER fly with them again!

The ANA crew and their members were all extremely nice and caring. Shout out to the crews for working on Christmas and New Years. Y'all the real MVP

Awful. Worst airline I have ever been on. Crew were among the rudest people I have ever dealt with. United staff members were rude and disrespectful. My flight was delayed, causing me to miss a connecting flight. I understand things happen, but when staff start lying about what actually happened, that is when I have an issue. Just be honest, really it isn’t that hard. I’m being very honest with this review and I don’t find this difficult what so ever. In fact, because of United Airlines, my Christmas holiday was off to a really rocky start. As someone who has traveled across the world, it has only been United that I have had a truly awful experience.

Boarding always seems a bit chaotic. Seat spacing could leave more for leg room.

Good flight. On time. Boarding and seating was easy. Crew were really friendly, yet professional. Bathroom (by cockpit) was small but serviceable. Some the seats were showing some notable wear & tear, but were comfy. Very happy UA customer. TY! 🤛🏽💗

We arrived early and finally made it to our gate almost an hour after.

We were delayed 3x and because I didn’t purchase my tickets directly from United Airlines I was told I Have to take care of it myself so I called Underpricer and they helped me but before I changed my flights I took the risk of sticking by what my tickets were and was lucky to have gotten on the original all flight with only 15 mins before take off. not sure if I will do this again

The flight was delayed so the people from a late connecting flight was able to still make the connection.

Everything good until we waited for jet bridge at SFO. Then pilot gets on speaker & said it won’t reach plane- too short, need to go to different gate. Then 5 min later, adjusted plane/jetbridge & all ok?!?

Was a pain having to leave the plane and reboard but glad the plane was fixed

The boarding system was all bogus - employees at the boarding gate were not sound like proffesional or may be possibly rational

I got an email in the morning of the flight 1/7, from Kayak, that I was rebooked from UA 906 to LH 430. Nobody at Lufthansa ot United knew about this. I went to both counters. at the airport. Also, Cheap Flights, who I booked the ticket through, did not know. I ended up staying on the United flight. But this was very disturbing, since I got a very late notice that I was rebooked to an earlier flight, I hurried to the airport to find out after a lot of inquiring that this was a mistake. Not a good Kayak experience.

Eet late informed about delay of more rhan four houts

After living in Europe for five years and flying with Lufthansa and KLM airlines, I’ve realized that United Airlines is now a budget carrier. The flight attendant are not friendly. The seats are not comfortable. And everything comes at a cost. I will be flying with KLM and Skyteam like Delta to the US going forward no doubt. United Airlines is not what it once was:

My schedule flight was rebooking and changed to Chicago, then I did not used the flight from Dulles to Savannah

Happy and nice crew and the atmosphere is very easy and calm. I got a wonderful travel with UA this time

Terrible experience. Should be a short simple flight from San Francisco to Palm Springs. Disgusting insult that United Air doesn’t have a cabin crew ready to receive a plane that’s already an hour plus late in departure. Lots of misinformation along the way from cockpit and crew. Definitely unimpressed with both union and management.

Seat cushioning, and having at least 1 checked bag free, I dont understand why international flight would not include a checked bag.

If I book through Lufthansa, I expect to fly on Lufthansa, not discover. Food was bad, plane was delayed. Will not be flying Lufthansa again.

Service was courteous and attentive. Sat in the exit row. In exchange for leg room I had people tripping over my feet to use it at a hallway from one aisle to the other, had no access to films viaa viewscreen and no underseat storage for medicines or other personal travel needs. Next time I am seated there, I will refuse the exit row.

Reliable, great value, but not outstanding in any aspect. This is similar to the experience you get in most international carriers like Etihad or Delta.

Flight got diverted because of an emergency and the crew were fantastic and probably saved that passenger’s life. While in emergency landing some measures could have been taken to prevent additional delays. In general not great experience with BA. I used to fly BA years ago all the time, very disappointed by the whole experience, seats were tight, bathrooms tight.

Business class area too small and chair and equipment not comfortable .

Lost my luggage in London Was double charged for luggage

Boarding could have been better organized. The one member of staff disappeared for a while so boarding by group relied on honesty.

I never made this flight but the staff helped to get me rebooked (see previous review)

The seat was very uncomfortable. It helped to use the foot rest. Could not sleep because of the seat.

The seats are incredibly uncomfortable. My luggage didn't make it on the flight from London to Nashville.

The plane itself is old and way overcrowded. The crew do a great job of trying to mitigate. It is just uncomfortable for over 8 hours, bearable, but barely. Boarding, and the baggage game, is ludicrous. Why charge extra to check bags when there is not enough room for everyone to "carry-on" and checking is needed? I do not think these issues would be different with other airlines, I believe it is the attitude that squeezes every penny out of each traveler.

Expected a lot better service paying for a business class seat. Seemed to be short on staff and did not get the service I expected.

Book Cheap Ontario Plane Tickets

Recent return flight deals

 
These are the cheapest return flights to Ontario found on KAYAK in the last 72 hours.
4/2Tue
2 stopsUnited Airlines
32h 21mLHR-ONT
11/2Tue
1 stopUnited Airlines
21h 05mONT-LHR
£404
12/2Wed
2 stopsUnited Airlines
20h 27mLHR-ONT
19/2Wed
2 stopsUnited Airlines
19h 40mONT-LHR
£405
11/2Tue
1 stopFinnair
16h 55mLHR-ONT
26/2Wed
1 stopFinnair
13h 11mONT-LHR
£420
8/3Sat
2 stopsLufthansa
21h 17mLHR-ONT
20/3Thu
2 stopsLufthansa
20h 40mONT-LHR
£436
12/2Wed
1 stopFinnair
16h 55mLHR-ONT
16/2Sun
1 stopFinnair
13h 11mONT-LHR
£452
19/3Wed
1 stopBritish Airways
15h 21mLHR-ONT
27/3Thu
1 stopBritish Airways
14h 11mONT-LHR
£454
11/3Tue
1 stopBritish Airways
14h 30mLHR-ONT
2/4Wed
1 stopBritish Airways
12h 20mONT-LHR
£455
24/3Mon
1 stopLufthansa
17h 05mLHR-ONT
14/4Mon
1 stopLufthansa
20h 40mONT-LHR
£470
15/2Sat
2 stopsVirgin Atlantic
42h 21mLHR-ONT
22/2Sat
2 stopsVirgin Atlantic
33h 44mONT-LHR
£491
23/4Wed
1 stopVirgin Atlantic
17h 15mLHR-ONT
30/4Wed
1 stopVirgin Atlantic
15h 56mONT-LHR
£507

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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.
20/2Thu
1 stop
16h 35mLGW-ONT
£306
2/3Sun
2 stops
33h 39mLGW-ONT
£314
22/1Wed
1 stopLufthansa
15h 59mLHR-ONT
£456
27/1Mon
1 stopFinnair
18h 17mLHR-ONT
£484
29/1Wed
1 stopFinnair
21h 20mLHR-ONT
£514
23/1Thu
1 stopLufthansa
14h 44mLHR-ONT
£516
4/6Wed
1 stopBritish Airways
15h 10mLHR-ONT
£536
25/1Sat
1 stopBritish Airways
15h 57mLHR-ONT
£741
20/3Thu
1 stopVirgin Atlantic
16h 42mLHR-ONT
£1,212
3/5Sat
1 stopVirgin Atlantic
19h 00mLHR-ONT
£1,213

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.
21/1Tue
multi-stop
31h 43mLGW-ONT
23/1Thu
multi-stop
18h 39mONT-LGW
£570
22/1Wed
multi-stopKLM
13h 43mLHR-ONT
5/2Wed
multi-stopKLM
13h 35mONT-LHR
£772
22/1Wed
multi-stopKLM
14h 42mLHR-ONT
30/1Thu
multi-stopKLM
13h 35mONT-LHR
£772
20/1Mon
multi-stopFinnair
21h 20mLHR-ONT
27/1Mon
multi-stopFinnair
17h 20mONT-LHR
£774
21/1Tue
multi-stopUnited Airlines
15h 59mLHR-ONT
11/2Tue
multi-stopUnited Airlines
14h 53mONT-LHR
£778
18/1Sat
multi-stopUnited Airlines
17h 41mLHR-ONT
22/1Wed
multi-stopUnited Airlines
14h 53mONT-LHR
£803
22/1Wed
multi-stopBritish Airways
16h 55mLHR-ONT
26/1Sun
multi-stopBritish Airways
22h 21mONT-LHR
£805
17/1Fri
multi-stopBritish Airways
35h 10mLGW-ONT
24/1Fri
multi-stopBritish Airways
59h 11mONT-LGW
£884
17/1Fri
multi-stopLufthansa
20h 32mEDI-ONT
24/1Fri
multi-stopLufthansa
17h 55mONT-EDI
£902
20/1Mon
multi-stopLufthansa
14h 44mLHR-ONT
23/1Thu
multi-stopLufthansa
17h 13mONT-LHR
£1,271

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Everything you need to know for your flight to Ontario

Information on the airport you'll fly into in Ontario

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