ONT

£324 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 15/4. 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
1 adult, Economy, 0 bags

KAYAK searches 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
Travellers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 27% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest return fare
£440
Typical prices: £731-£473
United Airlines
Tue 5/5Tue 19/5
LHR - ONT • 2 stops
Cheapest one-way flight
£324
Multiple Airlines
Wed 15/4
LGW - ONT • 2 stops
When to book
in advance
Our data shows that travellers who book at least 2 weeks in advance save around 39% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 18% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to Ontario!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights 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.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals to Ontario

Tue, 5 May - Tue, 19 May
United Airlines Logo
09:30 - 21:58
LHR
-
ONT
20h 28m
2 stops
United Airlines Logo
05:00 - 07:15
ONT
-
LHR
18h 15m
2 stops
£440United Airlines
Tue, 4 Aug - Tue, 18 Aug
United Airlines Logo
13:40 - 21:55
LHR
-
ONT
16h 15m
1 stop
United Airlines Logo
13:44 - 11:10
ONT
-
LHR
13h 26m
1 stop
£451United Airlines
Mon, 13 Apr - Mon, 27 Apr
United Airlines Logo
14:50 - 20:36
LHR
-
ONT
13h 46m
1 stop
United Airlines Logo
13:34 - 12:25
ONT
-
LHR
14h 51m
1 stop
£452United Airlines
Sat, 9 May - Tue, 12 May
Air Canada Logo
09:30 - 12:38
LHR
-
ONT
35h 08m
2 stops
Air Canada Logo
05:00 - 06:30
ONT
-
LHR
17h 30m
2 stops
£486Air Canada
Sat, 2 May - Fri, 8 May
Virgin Atlantic Logo
10:55 - 16:25
LHR
-
ONT
13h 30m
1 stop
Virgin Atlantic Logo
17:50 - 12:10
ONT
-
LHR
34h 20m
1 stop
£506Virgin Atlantic
Mon, 18 May - Tue, 26 May
British Airways Logo
19:00 - 18:38
LCY
-
ONT
31h 38m
2 stops
British Airways Logo
07:00 - 11:30
ONT
-
LCY
20h 30m
2 stops
£587British Airways
Tue, 29 Sep - Tue, 20 Oct
Iberia Logo
11:30 - 23:06
LGW
-
ONT
19h 36m
2 stops
Iberia Logo
14:22 - 20:00
ONT
-
LGW
21h 38m
2 stops
£587Iberia
Wed, 30 Sep - Thu, 29 Oct
Iberia Logo
11:30 - 23:06
LGW
-
ONT
19h 36m
2 stops
Iberia Logo
10:25 - 19:00
ONT
-
LGW
25h 35m
2 stops
£589Iberia
Mon, 11 May - Tue, 26 May
British Airways Logo
19:00 - 18:38
LCY
-
ONT
31h 38m
2 stops
British Airways Logo
07:00 - 11:30
ONT
-
LCY
20h 30m
2 stops
£595British Airways
Mon, 20 Apr - Sun, 10 May
Virgin Atlantic Logo
06:30 - 22:37
LBA
-
ONT
24h 07m
2 stops
Virgin Atlantic Logo
12:08 - 09:30
ONT
-
LBA
37h 22m
2 stops
£859Virgin Atlantic
Booking Insights

KAYAK's insights & trends for flights to Ontario

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 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 September, where tickets cost £412 on average for return flights. On the other hand, the most expensive months are July and December, where the average cost of tickets from the United Kingdom is £646 and £616 respectively. For one-way flights, the best month to travel is May with an average price of £464.

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, which saves you about 39% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 11 weeks before departure.

Good to know - Cheap tickets to Ontario

Low seasonJanuary
Cheapest flight£324
Best time to beat the crowds (11% less expensive on average)
Most popular time to fly and prices are also 22% 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.

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.

Reviews of the top 3 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.
7.5
Virgin AtlanticOverall score based on 685 reviews
7.7Boarding
7.3Comfort
6.9Food
8.1Crew
7.5Entertainment
Airline reviews

Seating and zone. The minor I went with didn’t even seat close to me

4.0 OkayAnonymous, Mar 2026
BOS - LIS
Read more Virgin Atlantic reviews

Seating and zone. The minor I went with didn’t even seat close to me

My seat 3G did not go down fully and the buttons were not working properly

Food has been disappointing in both legs of flight to india

Great staff great experience, made a 2 hour delay very bearable

Great staff, great experience, made a 2 hour delay very bearable

Food was the worst I’ve had on a VA flight. Normally it’s a lot better

I was my pleasure to fly virgin on my birthday for my first solo trip ever 🫶🏼

These are one of the older seat arrangements facing away from the windows! Not particularly convenient sets. No storage spaces. NO COAT HANGING HOOKS. Inconvenient business class seat compared to any other airlines of similar class. Staff are excellent! Extremely professional, friendly. Food is good too.

Overall, flight was excellent but check in was very slow for Premium Economy. Economy queue was shorter but we weren't allowed to use it.

The staff was not very polite but the flight was very very nice and comfortable and the entertainment was great

Terrible, if possible won't be flying again anytime soon!

Wonderful in-seat entertainment with seatback screens and huge selection of quality movies. The ability to bluetooth connect headphones was amazing.

we did a return flight from Paris CDG to SFO. This trip was much better than the departing flight SFO to CDG. The food was better quality, the crew was nicer, and the interior of the plane seemed cleaner.

Horrible service no Wi-Fi connection on both leg of the flight and they are refusing to fix bad service

We got to get extended leg room in Econ plus that was great. It was nice having our own dietary needs met with our meals, and the connecting flights had it as well. Only negative were the seats my bottom was/is really sore after a ten plus hour flight. Those seats are horrible, understandable for as many people use them. So we are going to purchase a gel seat pad.

Flight to Japan was was better across the board than the return to USA. Entertainment: Movie selection was old and not to my liking. Way too many woke choices. Not enough selections for sports or drama. Service: some of the crew were great. Not all. I paid for business class. a premium. Some of the crew thought they 'had' t do there job instead of wanting to serve and be polite. Food: Way to Japan was good. Way back to USA bad. Boarding: Wat out did not offer Business only; had to go thru general. If you pay for business, you should get business perks. Suggest you look for other than United for travel to Asia

I will never fly ANA again. They lost one of my large pieces of checked luggage, the heaviest one with the most valuable items in it, and they said they will not send me an email unless they can't find it, even though the paper they gave me to track the status of my lost luggage requires a code from an email they are supposed to send me so I can do baggage tracing. They claim to be an international airline, but they also insist on calling a Japanese telephone number to confirm where to send the lost baggage if they find it. It is impossible to find an actual contact email address for customer support on their website, and their AI chatbot is unhelpful, directing you to a webpage that says it is for contact information but does not have any actual email addresses or phone numbers listed on it. My seat in economy did not recline at all, even though I was not sitting in an exit row nor the very back row. I had to sit in the fully upright position for over ten hours of international travel. Awful experience overall.

The head flight attendant made the trip excellent. He was very accommodating.

The economy seats on the 777 was not as cramped as I had feared, but the food was terrible.

Terrible experience! delay 2 time and say i dont have ticket

The Britts are wonderful to fly with and the crew were very hospitable. Again, I really wish they had been able to retrieve my carryon bag from baggage claim before the flight so I could be in a less worrisome state of mind, but that's not on them. I completely understand. The window seats with the dimmable windows were very cool!

There was a delay for the San Francisco-London flight, but we were all informed via text and email. The staff was very friendly and nice and the food was good. I do recommend that the airline offer something without eggs or something vegan for the vegetarian meal option. A lot of Indians are lacto-vegetarian, while some could be allergic to eggs/dairy.

food options were terrible. for a 10-hour flight, there should be 2 decent meals. Also, flight attendants should come around with drinks more than just at the meals.

Smooth flight. The seats were comfortable but the reclining mechanism didn't work very well. My wife's seat required the flight attendant to push the seat forward while she pushed the button. The leg support didn't want to return to its home under the seat. I ordered the diabetic meal which was full of carbs. It was low in sugar but carbs turn into sugar so was it really diabetic? Overall the flight was pleasant, long but pleasant.

Crew were nice, food was good. Boarding was horrendous. We were driven around the airport in a bus forced to climb a long flight of very steep stairs with no adequate handrails to board the plane . In many many years of flying to the US I have never been required to do this . There was no assistance for those needing help getting up the stairs to the plane. A fellow passenger helped me. No idea how other elderly, physically limited passengers or those with young children managed . It was a full flight with crowds trying to get up the stairs. It was an accident waiting to happen.

Horrible, the plane is just old and junky...Filthy restroom, seat was as hard as rock. The food, mystery side dish, inedible..geez..just Horrible. Never flying BA again

the service on Business class should be improved to be at par with industry leaders like Cathay Pacific and Singapore AIrlines. A lot of room for improvement.

Late takeoff, but on time landing. Lost bags, 3 days to find them, still in transit to my location. Power outlets broken, Wi-Fi not working, so much for working on the long flight.

Good. For a long flight. The comfort of the seat could be better. Also, the food was « normal » plane food. Not indian plane food unfortunately! Everything else was smooth and great.

The seats were comfortable. So many empty seats allowed for stretching out and sleeping. The onboard entertainment was pretty good. The cabin crew were so kind and kept the passengers well- hydrated, and well fed.

Everything you need to know for your flight to Ontario

Information on the airport you'll fly into in Ontario