You know where to go
Select an airport in the search form
You don't know where to go
See where you can go on your budget
Cheap flights from Ontario to United States
Round-trip
Economy
Flight information for Ontario to United States
Find info about flight duration, direct flights, and airports for your flight from Ontario to United States
| Fastest flight time | 1h 3m | The fastest flight from Ontario to United States takes 1h 3m |
| Direct flights | None | There are no direct flights from Ontario to United States. Popular non-direct routes for this connection are Ontario - Seattle/Tacoma Intl, Ontario - New York John F Kennedy Intl and Ontario - Newark. |
Easily compare round-trip flights from Ontario to United States
Below you can see the best fares for your round-trip flight route over the next three months. All fares were found on momondo this week. Browse the quickest and cheapest flights from Ontario to United States by changing tabs
Frontier![Frontier]()
Nov 8![Frontier]()
Nov 11
ONT6:45 amOntario
1h 04m
LAS7:49 amLas Vegas McCarran
LAS11:00 amLas Vegas McCarran
0h 58m
ONT11:58 amOntario
Frontier![Frontier]()
Aug 9![Frontier]()
Aug 11
ONT7:07 amOntario
1h 08m
LAS8:15 amLas Vegas McCarran
LAS5:15 pmLas Vegas McCarran
1h 03m
ONT6:18 pmOntario
Find the cheapest one-way flights from Ontario to United States
If you're looking for one-way flights from Ontario to United States, view some of our deals below provided by Frontier
Best airlines flying from Ontario to United States
Compare and see reviews for airlines that fly from Ontario to United States with momondo
AirlineFree CancellationPrice
PriceFrom $28
Free Cancellation
Reviews
Pros: Seats were fine as they were basic accommodations.
Cons: There was a 90 mins delay which would’ve been a little more palatable if I didn’t have 2 small children with me, and if they could have offered us regular updates to plan accordingly such as bathroom breaks and feeding my kids. Having a 3 and 5 year old in tow is already a bit tough but there were no gate agents there to update us, and no one to offer exactly how long the flight would be delayed. All they could offer was they had to do some specialty cleaning since the plane arrived from Mexico. I would imagine they knew it was coming from Mexico so I’m also not quite why Frontier didn’t plan enough of a buffer to accommodate the necessary sanitation guidelines required. We were delayed 90 mins for a 45 mins flight. Then the already beleaguered passengers were restless and started arguing at the back of the plane about deplaning etiquette which I guess should go out the window when flying a budget airline? All in all a pretty poor experience
1 / 10
PriceFrom $43
Free Cancellation
Reviews
Pros: The comfort of the plane was great! Lots of room and very comfortable seating.
Cons: I found some members of staff to be a bit rude. When other passengers asked questions or did something wrong (that was a minor issue), one of the staff members in particular talked down to them and treated them like they were stupid.
1 / 10
PriceFrom $48
Free Cancellation
Reviews
Pros: Everything! From ticketing agent to all the crew on our flight back were awesome. Thank you!
1 / 10
PriceFrom $49
Free Cancellation
Reviews
Cons: Boarding at a tourist location is tough but cabin space is prestigious nowadays. Passengers need to be given clear guidance for carry-on baggage since it delays the onboarding process.
1 / 10
PriceFrom $52
Free Cancellation
Reviews
Cons: Wouldn't let us on the flight when there was plenty of time to get there. Manager was arrogant and slow - didn't care. Poor policies at that airport.
1 / 10
PriceFrom $62
Free Cancellation
Reviews
Pros: Well, it was not very comfortable and we were delayed for an hour. And a crew member was sick.
Cons: Mostly everything.
1 / 10
PriceFrom $71
Free Cancellation
Reviews
Pros: Delayed flight no reasons seems like American Airlines don’t know what to do in these situations
Cons: I believe this airlines should have figured the answer to this question by now.
1 / 10
PriceFrom $154
Free Cancellation
Reviews
Pros: The plane was new and the seats were nice.
1 / 10
Are airlines flying from Ontario to United States offering flexible cancellation due to COVID-19?
To ease the stress of booking flights, some of our airline partners flying from Ontario to United States are responding to the global pandemic. The following airlines may have a flexible cancellation policy to help accommodate travelers: Alaska Airlines, United Airlines, and American Airlines.
Can I fly to United States from Ontario right now?
Information is based on travel restrictions for travel to United States within the United States
Most visitors from Ontario need to provide a negative COVID-19 test result and/or quarantine to enter United States.
COVID-19 testing requirements
Visitors from Ontario must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours before departing to United States.
Quarantine requirements
Visitors from Ontario are not required to quarantine after entering United States.
Most visitors from Ontario need to provide a negative COVID-19 test result and/or quarantine to enter United States.
COVID-19 testing requirements
Visitors from Ontario must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours before departing to United States.
Quarantine requirements
Visitors from Ontario are not required to quarantine after entering United States.
Can I fly back to Ontario from United States?
Returning to Ontario from United States
COVID-19 testing requirements
Visitors from United States must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours before departing to Ontario.
Quarantine requirements
Visitors from United States are not required to quarantine after entering Ontario.
COVID-19 testing requirements
Visitors from United States must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours before departing to Ontario.
Quarantine requirements
Visitors from United States are not required to quarantine after entering Ontario.
Alternative routes for Ontario to United States
Compare alternative flights to and from nearby airports and cities to discover the best prices and most convenient flight times
Useful information for finding Ontario to United States flight deals
Learn about all of the flight booking features offered by momondo for free.
How do I get Price Alerts for flights from Ontario to United States?
Price Alerts will notify you by email when the price for flights to United States from Ontario decreases. To activate this, select your desired travel dates and search for offers. While browsing through offers you’ll see the Price Alert widget toggle. Click it to turn on notifications.
How can I save money on flights from Ontario to United States with momondo?
Leverage our AI within our “Price Forecast” tool, which predicts if it’s better to book now or wait until prices decrease. You can strategically pick the best days to fly and save money on your trip by using our “Price Calendar” tool. “Explore” shows an overview of how much it costs to fly to anywhere from a selected city or airport. Our “Discover” content is a great option for travel inspiration and money-saving tips, while “Price Alerts” will update you when prices change, so you can book when fares are right.
How does momondo find its flight prices?
We aggregate our prices from over 700+ competitors from airlines to OTAs. We operate in over 30 markets worldwide to show you a wide range of travel options.