$35 Find Cheap Flights from Ontario to North America

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight $[0,preposition:'from ']$[0,article:'from ']$[0,place:'from'] $[1,preposition:'to ']$[1,article:'to ']$[1,place:'to'] departing on 6/6. 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.
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Best North America Flight Deals from Ontario

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
New York
New York1 stop$203
Los Angeles
Los Angeles1 stop$453
Las Vegas
Las Vegasnonstop$77
Miami
Miami1 stop$212
Chicago
Chicago1 stop$199
San Francisco
San Franciscononstop$52
Boston
Boston1 stop$238
Denver
Denvernonstop$91
Seattle
Seattlenonstop$105
Fort Lauderdale
Fort Lauderdale1 stop$291
Atlanta
Atlanta1 stop$194
Dallas
Dallasnonstop$122
Tampa
Tampa1 stop$206
Houston
Houstonnonstop$135
Cancún
Cancún1 stop$319
Honolulu
Honolulunonstop$318
San Diego
San Diego1 stop$343
New York
New York1 stop$203
Los Angeles
Los Angeles1 stop$453
Las Vegas
Las Vegasnonstop$77
Miami
Miami1 stop$212
Chicago
Chicago1 stop$199
San Francisco
San Franciscononstop$52
Boston
Boston1 stop$238
Denver
Denvernonstop$91
Seattle
Seattlenonstop$105
Fort Lauderdale
Fort Lauderdale1 stop$291
Atlanta
Atlanta1 stop$194
Dallas
Dallasnonstop$122
Tampa
Tampa1 stop$206
Houston
Houstonnonstop$135
Cancún
Cancún1 stop$319
Honolulu
Honolulunonstop$318
San Diego
San Diego1 stop$343

Cheap Flights from Ontario to North America (ONT-0NA)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to North America 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 round-trip flight deals from Ontario to North America

Fri, Jun 13 - Fri, Jun 13
United Airlines Logo
6:00 am - 7:27 amONT-SFO
1h 27mnonstop
United Airlines Logo
10:45 am - 12:14 pmSFO-ONT
1h 29mnonstop
$52United Airlines
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Fri, Jul 4 - Mon, Jul 7
United Airlines Logo
6:10 am - 7:37 amONT-SFO
1h 27mnonstop
United Airlines Logo
10:45 am - 12:14 pmSFO-ONT
1h 29mnonstop
$57United Airlines
Find Deal
Fri, Jun 20 - Sun, Jun 22
Frontier Logo
9:41 pm - 11:15 pmONT-SFO
1h 34mnonstop
Frontier Logo
10:11 pm - 11:39 pmSFO-ONT
1h 28mnonstop
$59Frontier
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Mon, Jun 2 - Mon, Jun 9
Frontier Logo
9:41 pm - 11:15 pmONT-SFO
1h 34mnonstop
Frontier Logo
10:11 pm - 11:39 pmSFO-ONT
1h 28mnonstop
$64Frontier
Find Deal
Tue, Jun 17 - Tue, Jun 24
Southwest Logo
9:35 pm - 10:40 pmONT-LAS
1h 05mnonstop
Southwest Logo
7:10 am - 8:10 amLAS-ONT
1h 00mnonstop
$77Southwest
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Wed, Jun 11 - Sat, Jun 14
Southwest Logo
8:10 pm - 11:15 pmONT-LAS
3h 05m1 stop
Southwest Logo
7:35 am - 8:40 amLAS-ONT
1h 05mnonstop
$124Southwest
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Tue, Jun 17 - Tue, Jun 17
American Airlines Logo
6:23 am - 12:37 pmONT-SFO
6h 14m1 stop
American Airlines Logo
3:23 pm - 9:38 pmSFO-ONT
6h 15m1 stop
$216American Airlines
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Thu, Jul 24 - Tue, Aug 12
Delta Logo
2:14 pm - 5:00 pmONT-SEA
2h 46mnonstop
Delta Logo
7:50 pm - 10:42 pmSEA-ONT
2h 52mnonstop
$217Delta
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Thu, Aug 14 - Sat, Aug 16
Delta Logo
1:15 pm - 7:45 pmONT-DEN
5h 30m1 stop
Delta Logo
6:25 pm - 10:40 pmDEN-ONT
5h 15m1 stop
$217Delta
Find Deal
Sat, Jul 12 - Mon, Jul 14
American Airlines Logo
4:45 pm - 9:42 pmONT-DEN
3h 57m1 stop
American Airlines Logo
6:45 pm - 9:38 pmDEN-ONT
3h 53m1 stop
$219American Airlines
Find Deal
Useful Info

KAYAK's insights & trends for Ontario to North America flights

Get data-powered insights and trends into flights from Ontario to North America to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest Ontario to North America flight route?

The cheapest price for flight routes found by users searching on KAYAK in the last 2 weeks for round-trip flights from Ontario to North America.

The cheapest ticket to North America from Ontario found in the last 72 hours was to San Francisco, at $43 round-trip. The most popular route is from Ontario (ONT) to Seattle (SEA), and the cheapest round-trip airline ticket found on this route in the last 72 hours was $95.

Can I save money by flying with a layover from Ontario to North America?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $593, prices are generally cheapest when you fly direct.

What is the cheapest month to fly from Ontario to North America?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario to North America, 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 from Ontario to North America is January, when tickets cost $277 (return) on average. On the other hand, the most expensive months are December and July, when the average cost of round-trip tickets is $460 and $416 respectively.

What’s the cheapest day of the week to fly from Ontario to North America?

The average price of all round-trip flights from Ontario to North America clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to North America on a Monday and more expensive on a Thursday. On your return trip to Ontario, you should consider flying back on a Saturday, and avoid Sundays for better deals.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Ontario to North America, 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 on the flight from Ontario to North America, you should book around 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 13 weeks before departure.


Good to know

Low seasonFebruary
High seasonJuly
Cheapest flight$35
Best time to beat the crowds but there is an average 1% increase in price.
Most popular time to fly with an average 4% increase in price.
Flight from Ontario to San Francisco

Flights from Ontario to North America: the best tips from KAYAK users

Insights shared by verified travelers who flew the route from Ontario to North America 
Verified travelerFlew with FrontierONT-LASDec 2024
Pack light and arrive earlier.. Also download the App and check your flight and check in..
Verified travelerFlew with FrontierONT-PDXOct 2024
ONT by far the best airport in SoCal.
Verified travelerFlew with Alaska AirlinesONT-PDXOct 2024
Portland is a big airport, give yourself time.
LeoFlew with American AirlinesONT-CLTSep 2024
Have plenty of patience for the casual travelers! They are oblivious of rules and etiquettes that slows down the process for everyone. Case in point, a guy held up the line trying to place both his personal item (should be UNDER the seat in front of you) and his carry on case horizontally. Obviously not aware of the big poster right in front of his displaying the proper way of placing his case on it's side. Slowed the whole line of people behind him. Also be mindful the agents in Ontario airport (or any smaller airports) might not be the most knowledgeable on the rules and regulations of air travel, luggage specification allowances etc. Stay patient!! Also the seats do not recline that well anymore on AA flights. So if you have back problems, be sure to bring some back supports.
PolarFlew with Alaska AirlinesONT-PDXAug 2024
Bring a jacket! It is much cooler in the Pacific Northwest than southern California!
Verified travelerFlew with Hawaiian AirlinesONT-HNLJul 2024
TSA was super fast. Easy airport to navigate.
ShonelleFlew with FrontierONT-DENAug 2024
Don't choose Frontiet Airlines as your flight provider.
WILLIAMFlew with American AirlinesONT-DFWMar 2024
Check in counter is small, limited staffs for early flights. Also, limited Kiosk stations as well.
MariFlew with American AirlinesONT-CLTJan 2024
Bring a blanket it's very cold on plane

FAQs - booking North America flights

  • How does KAYAK find such low prices on flights from Ontario to North America?

    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 from Ontario to North America.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to North America?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Ontario to North America is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Ontario to North America?

    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 from Ontario to North America 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 from Ontario to North America?

    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 from Ontario to North America up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to North America?

    The cheapest time of day to fly to North America is generally in the evening, when round-trip flights cost $309 on average. Morning departures are around 100% cheaper than evening flights, on average. The most expensive time of day to fly to North America is generally at night, which is peak travel time and where the average cost of a ticket is $387.

Top tips for finding cheap flights to North America

  • Looking for a cheap flight? 25% of our users found tickets from Ontario to the following destinations at these prices or less: Denver $98 one-way - $191 round-trip; Dallas $155 one-way - $264 round-trip; Seattle $118 one-way - $176 round-trip

Top 5 airlines serving from Ontario to North America

Need help choosing which airline to fly with from Ontario to North America? 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.
8.0
SouthwestOverall score based on 4291 reviews
7.1Food
7.6Entertainment
8.2Boarding
8.6Crew
8.0Comfort
Airline reviews

It was a perfect flight in all aspects! Both legs!

10.0 ExcellentAnonymous, Apr 2025LGB - SMF
Read more Southwest reviews

It was a perfect flight in all aspects! Both legs!

Great flight, 47 passengers on a 180 seat plane. Stewardess was pleasant and cheerful.

I liked the crew member who gave flight instructions on "in case of a problem:. The seats are so small that only a young teenager could sit in middle seat.

Great flight staff. Ease of boarding. Overall, very uneventful and easy trip.

Employees were kind and funny, as always! Flight was late but no announcements were made for people with tight connections to help them transition quickly. No service due to turbulence.

I recently flew Southwest from San Jose to Honolulu. I was very impressed with the flight crew, especially the flight attendant in charge of the front of the plane. She came through the aisle at least five times for drinks and water, and two times for snacks. I have not seen such service since I flew first class. Also, for the first time, they gave us the correct baggage claim number, and the luggage came out quickly. I can't wait for Southwest to have assigned seating! I absolutely hate the Cattle Call boarding procedure and the mad dash to get seats and overhead bins. However, the boarding was efficient.

We had a nice flight. Boarding was easy, our seats were comfortable and the on board service was pleasant.

Service was great, boarding and exiting went smoothly, and the flight was very pleasant.

Was as expected. Crowed planes. Too many carryons delaying takeoff. But the ride only took an hour and saved me a lot of time SFO is a not a great airport.

Was as expected. Crowed planes. Too many carryons delaying takeoff. But the ride only took an hour and saved me a lot of time SFO is a hell hole of an airport. It is the new LaGuardia. Everything Cobbled together. Security gates closed. Terri directional signage

737-800 in first class was pretty dumpy. Seat had an uncomfortable angle, storage under the seat was blocked so even my very modest backpack didn't fit, power outlet was flaky. Weird tiny seat pockets that couldn't hold a gallon ziploc bag, emesis bag missing, etc. etc. No in-flight service due to turbulence. Crew was excellent, boarding was smooth despite a full flight.

Delta flight was on time, seats were comfortable, and crew was nice.

Bathrooms dirty sinks clogged. No one seemed to clean them. Plane very old

Thank you for not flipping the plane on the run way. You guys get a 5 star rating for the flight!!!

Boarding is, as it always is… horrible. Gate lice. Slow moving zones. Too many people with carry ons

It was terrible, if they ran flights on time it would make a big difference.

Delta seems to be improving in many areas, except they are super bad with the food available. Bring back normal food service on long flights.

I actually received a notification from kayak on email but not one by text from Delta when my departure gait changed and I almost missed my flight

New boarding doesn't make sense. Filling front first is slow.

Delta flight was great from the check in all the way to arrival. However, I had a very bad experience. I requested a wheelchair and the wheelchair employee that went to pick me up from the plane in Boston to bring me to the baggage claims told me I have to pay him. I was under the impression that it was a free service and I usually give tips but the person forced me to pay and since I said no because I was upset with his demand when my daughter walked in to pick me up he demanded payment from my daughter who paid him thinking maybe now it is a charged service.

Boarding seemed to be organized bedlam. For what ever reason, preboarding took longer than 20 minutes. Made the plane 20 minutes late taking off. Luckily we arrived on time. Flight crew seemed very friendly. Only slight turbulence.

They hired a new catering company the same day of my flight. They botched the job by not delivering the right carts and after THREE HOURS waiting, the flight crew timed out (flight was 19 hours long and FAA rules state crew can’t work more than 14 hours long). So they CANCELED OUR FLIGHT!! Worst experience ever. Avoid UAL at all costs.

The personnel were professional and friendly. The Boeing 737 Max 9 is too claustrophobic and was very warm at both airport gates, and still warm in the air.

While the staff was pleasant and helpful, the following observations are for your awareness. There was some delay on the tarmac on take off and landing. The paid lunch/food offerings were limited. Entertainment was only available on WiFi at a cost.

get E+, a must for 5 hours flight if you are tall

The first flight was better in terms of the aircraft.

Liked fold flat bed. Didn’t like having no window. Didn’t like poor choice of food and being served dinner very late, hours after take off of a 7:40pm flight. Servers not friendly. Food horrible in business class.

Everything is good except the dinner and breakfast. The sandwich is very delicious. Toilet is clean, I only use one of them. Flight attendants are very nice. 👍👍

The gate was too far away for the connecting flight

Compared with other carriers business class for an overnight was not worth the extra expense.

Eventless. It was a good flight and good crew. Can’t complaint.

Very helpful ground crew after an earlier flight delay and being rebooked on a different flight.

British Airways staff are very polite and willing to help.

The plane was late and then sat on the runway for almost 45 minutes before taking off.

We kept being told that the flight was full and that all overhead compartments were full and therefore had to check in our hand luggage. We were some of the last people to board and noticed that there was still sufficient space in the overhead compartments. We were obliged to check in hand luggage when there was space and so had to wait at luggage retrieval which took a while to then noticed damage to our luggage - not a great experience!

Worst seats I’ve ever had !!! The seats were very narrow and uncomfortable and misaligned with the seats in front of mine leading to bottom of the seat in front of mine pressing on my legs for 15.5 hours !

This was an overnight flight. There was no meal service in first class, just a simple snack basket was offered along with beverages. There should have been some type of continental breakfast prior to arrival in PHL. As an Executive Platinum American Airlines Advantage member, I received no name recognition from the first class flight attendant. When disembarking at PHL, the flight attendants were more interested in their cell phones than saying "thank you" to the passengers as they disembarked.

The flight was quick and to the point. The crew just did their job w/o excessive talking and everything was just perfect.

Awkward carry on process. Forced to check all carry on. No overhead space of worthiness. Left delayed, but made up the time. Crew was amicable.

Amazingly comfy flight - I had upgraded for a reasonable price and it was worth it. The food also was good.

The reps working at the airport counter were dumber than a second coat of paint.

My costume jewelry was stolen out of my bag. Got to airport and my bag weighed 45 pounds- 5 pounds over cost me $100 Long lines in tier one. No entertainment No WiFi no free drinks or snacks

The seats were awful, hard plastic covered in sheet vinyl. The airline tries to scam you into paying extra to get seat together when the flight wasn’t full. They were going to separate a family with young children but my wife who had a row to herself gave up her seat so the young mom could be with her young boys. I’m never giving this airline my money again.

It was a short flight so no food or entertainment….

Frontier had yet another flight cancellation. Have never made a complete round trip with this airline without at least one leg getting cancelled. Miserable flights - dirty, uncomfortable planes that apparently always have issues since I've had multiple delays and cancellations with them.

Flight was delayed 3 times, would have been nice to have received text message instead of email notifications. Frontier app wasn’t even updated accordingly, no gate number disclosed. No agent at front desk of gate to inform of delay. Very confused and left if the dark

They changed the timing , first delayed by 4 hours then went back to 40 mins late, we had to run back to airport to not miss our flight. This is ridiculous

No frills for sure. No gate announcements about flight delay, not even water to drink on the flight.

I loked walking out on the tarmac to board and no first class. I didn't like that they have no snacks or onboard wifi to bide your time.

It was a redeye flight, so every passenger just wanted to sleep, but through the entire flight, the flight crew made announcements over the loudspeaker at maximum volume every few minutes making sleep impossible. For example: it’s 2am, and the crew decides to give an extremely detailed announcement about snacks and beverages for sale. And 3am is the perfect time to wake up everyone with a lengthy announcement about how to get a coffee refill and how to take advantage of new offer from frontier for a credit card.

Everything you need to know for your flight to North America

Information on your arrival and departure airports

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