ONT

362€ Find Cheap Flights to Ontario – Compare and Save

1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest return fare
495 €
Typical prices: 548 €-621 €
British Airways
Thu 22.10.Sat 7.11.
FRA - ONT • 1 stop
Cheapest one-way flight
362 €
Multiple Airlines
Sun 25.10.
BER - ONT • 2 stops
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Booking Insights
Flight Deals

Cheap Flights to Ontario

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

Recent return flight deals to Ontario

Thu, 22. Oct - Sat, 7. Nov
British Airways Logo
9:20 - 22:59FRA  Frankfurt am Main-ONT Ontario
22h 39m1 stop Charlotte Douglas
British Airways Logo
7:00 - 7:15ONT  Ontario-FRA Frankfurt am Main
15h 15m1 stop Dallas/Fort Worth
495 €British Airways
Wed, 14. Oct - Wed, 28. Oct
American Airlines Logo
11:30 - 23:52BER  Berlin Brandenburg-ONT Ontario
21h 22m2 stops London Heathrow Dallas/Fort Worth
American Airlines Logo
10:25 - 11:20ONT  Ontario-BER Berlin Brandenburg
16h 55m2 stops Dallas/Fort Worth London Heathrow
547 €American Airlines
Thu, 24. Sep - Mon, 28. Sep
American Airlines Logo
6:45 - 23:36HAM  Hamburg-ONT Ontario
25h 51m2 stops London Heathrow Dallas/Fort Worth
American Airlines Logo
14:22 - 22:45ONT  Ontario-HAM Hamburg
23h 23m2 stops Dallas/Fort Worth London Heathrow
549 €American Airlines
Thu, 24. Sep - Mon, 28. Sep
American Airlines Logo
6:45 - 23:36HAM  Hamburg-ONT Ontario
25h 51m2 stops London Heathrow Dallas/Fort Worth
American Airlines Logo
14:22 - 22:45ONT  Ontario-HAM Hamburg
23h 23m2 stops Dallas/Fort Worth London Heathrow
550 €American Airlines
Sat, 21. Nov - Mon, 30. Nov
British Airways Logo
10:00 - 22:36DUS  Duesseldorf Intl-ONT Ontario
21h 36m2 stops London Heathrow Dallas/Fort Worth
British Airways Logo
9:20 - 21:40ONT  Ontario-DUS Duesseldorf Intl
27h 20m2 stops Phoenix Sky Harbor Intl London Heathrow
550 €British Airways
Thu, 15. Oct - Sat, 24. Oct
American Airlines Logo
6:45 - 12:14HAM  Hamburg-ONT Ontario
38h 29m2 stops London Heathrow Phoenix Sky Harbor Intl
American Airlines Logo
23:59 - 14:55ONT  Ontario-HAM Hamburg
54h 56m2 stops Dallas/Fort Worth London Heathrow
550 €American Airlines
Thu, 24. Sep - Mon, 28. Sep
American Airlines Logo
6:45 - 23:36HAM  Hamburg-ONT Ontario
25h 51m2 stops London Heathrow Dallas/Fort Worth
American Airlines Logo
13:04 - 22:45ONT  Ontario-HAM Hamburg
24h 41m2 stops Phoenix Sky Harbor Intl London Heathrow
551 €American Airlines
Thu, 24. Sep - Mon, 28. Sep
American Airlines Logo
6:45 - 23:36HAM  Hamburg-ONT Ontario
25h 51m2 stops London Heathrow Dallas/Fort Worth
American Airlines Logo
14:22 - 22:45ONT  Ontario-HAM Hamburg
23h 23m2 stops Dallas/Fort Worth London Heathrow
552 €American Airlines
Wed, 21. Oct - Wed, 11. Nov
United Airlines Logo
14:45 - 22:51BER  Berlin Brandenburg-ONT Ontario
17h 06m2 stops Frankfurt am Main San Francisco
United Airlines Logo
6:00 - 7:55ONT  Ontario-BER Berlin Brandenburg
16h 55m2 stops San Francisco Newark
560 €United Airlines
Wed, 21. Oct - Thu, 29. Oct
United Airlines Logo
8:45 - 12:18BER  Berlin Brandenburg-ONT Ontario
36h 33m3 stops Frankfurt am Main Philadelphia San Francisco
United Airlines Logo
5:00 - 16:40ONT  Ontario-BER Berlin Brandenburg
27h 40m2 stops Denver Intl Munich Franz Josef Strauss
564 €United Airlines
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 are the most popular airlines flying to Ontario?

The most popular airline among KAYAK users flying to Ontario is Lufthansa, followed by United Airlines and Condor.

Good to know – Book Cheap Ontario Plane Tickets

Low season

November
Best time to beat the crowds (8% less expensive on average)
Most popular time to fly and prices are also 9% lower on average.

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

FAQs - booking Ontario flights

  • How far is Ontario Airport from central Ontario?

    You’ll need to travel 5 km to reach the Ontario city centre from Ontario Airport.

  • What is the name of Ontario’s airport?

    There is only 1 airport in Ontario, called Ontario Airport (ONT). 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 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 airline flying to Ontario

 
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.
7,4
United AirlinesOverall score based on 10157 reviews
7,3Comfort
8,1Crew
7,1Entertainment
6,7Food
7,7Boarding
Airline reviews

The flight was excellent. Their was no service as we boarded, the flight attendants spent about 30 minutes just taking and not really caring that the cabin was about 80 degrees and did not offered any beverage to first class passengers or any passenger. The flight from DEN to ONT is not long but not under an hour, we received one drink and bag of chips if you were lucky. I was in first class…. I did leave my hat on the plane and it only took less than five minutes for a United rep to locate and bring it to me.

10,0 ExcellentFred, Aug 2026
Read more United Airlines reviews

The flight was excellent. Their was no service as we boarded, the flight attendants spent about 30 minutes just taking and not really caring that the cabin was about 80 degrees and did not offered any beverage to first class passengers or any passenger. The flight from DEN to ONT is not long but not under an hour, we received one drink and bag of chips if you were lucky. I was in first class…. I did leave my hat on the plane and it only took less than five minutes for a United rep to locate and bring it to me.

United was excellent. We had very good experience flying the carrier. Certainly. We will opt to fly them for sure. Lufthansa is out.

Crew was great! Good meals. Had room to stretch out

Meals were poor and service rendered on return flight was mediocre as compared to the flight we took to Germany earlier where the attendants were more attentive, energetic, and mindful of passengers' needs. Thumbs up to crew of UA 58. Thumbs down to UA 59..

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.

Ok. Get a different kosher caterer. The food was odd.

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

The Cree was BEYOND AMAZING. They were, by far, THE BEST CREW I had the pleasure of flying with. They catered to my every need, beyond friendly, and upheld the highest level of professionalism that is of Lufthansa Airlines.

Lufthansa and United Airlines messed up with our reservation and they canceled our flight to Los Angeles. We ended up stuck in Frankfurt with two little kids. They sent us to San Francisco, but their flight was full and they wanted us to sit separated (even our 3-year-old was supposed to sit separated from me or my husband!!! Isn't it illegal???). Then the flight from San Francisco was delayed and we had two little sleepy kids, we were also told we needed to pick up our luggages. It was just horrible. I paid for a direct flight from Frankfurt to LAX and ended up going through hell. I am very upset and going to submit a complaint.

Airline did not explain reasons why flight was delayed two hours. Explanations were badly needed and rarely provided. Problem seemed to clearly be the airline’s fault and not the fault of the weather or airport.

Everything you need to know for your flight to Ontario

Information on the airport you'll fly into in Ontario