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$40 Find cheap flights from North America 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 6/9. 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
0 bags
Mon 7/1
Mon 7/8

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In the last 7 days travelers have searched 42,335,261 times on KAYAK, and here is why:

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Good to know

Low season

January

High season

May

Cheapest flight

$40
Best time to beat the crowds with an average 12% drop in price.
Most popular time to fly and prices are also 6% lower on average.
Flight from San Francisco to Ontario

FAQs for booking flights from North America to Ontario

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

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from 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 North America 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 to North America with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from North America 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 from North America up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Prefer to fly non-stop from North America to Ontario?

Find which airlines fly direct from North America to Ontario, which days they fly and book direct flights.

Nonstop departures

North America to Ontario

Monday

Aeromexico, Air Canada, Air France, +23 more

Aeromexico, Air Canada, +24 more

Tuesday

Aeromexico, Air Canada, Air France, +24 more

Aeromexico, Air Canada, +25 more

Wednesday

Aeromexico, Air Canada, Air France, +23 more

Aeromexico, Air Canada, +24 more

Thursday

Aeromexico, Air Canada, Air France, +24 more

Aeromexico, Air Canada, +25 more

Friday

Aeromexico, Air Canada, Air France, +22 more

Aeromexico, Air Canada, +23 more

Saturday

Aeromexico, Air Canada, Air France, +23 more

Aeromexico, Air Canada, +24 more

Sunday

Aeromexico, Air Canada, Air France, +24 more

Aeromexico, Air Canada, +25 more

See more direct flights

Nonstop returns

Ontario to North America

Monday

Aeromexico, Air Canada, Air France, +23 more

Aeromexico, Air Canada, +24 more

Tuesday

Aeromexico, Air Canada, Air France, +24 more

Aeromexico, Air Canada, +25 more

Wednesday

Aeromexico, Air Canada, Air France, +23 more

Aeromexico, Air Canada, +24 more

Thursday

Aeromexico, Air Canada, Air France, +24 more

Aeromexico, Air Canada, +25 more

Friday

Aeromexico, Air Canada, Air France, +22 more

Aeromexico, Air Canada, +23 more

Saturday

Aeromexico, Air Canada, Air France, +23 more

Aeromexico, Air Canada, +24 more

Sunday

Aeromexico, Air Canada, Air France, +24 more

Aeromexico, Air Canada, +25 more

See more direct flights
See more direct flights

Top 5 airlines serving from North America to Ontario

 
Need help choosing which airline to fly with from North America 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.
8.0
Alaska AirlinesOverall score based on 9197 reviews
7.3Entertainment
7.3Food
7.9Comfort
8.6Crew
8.2Boarding
Airline reviews

Crew was outstanding. Flight was fine. Food was a joke! I didn't get the priority I paid for!! That pissed me off since I paid extra!!!

8.0 Excellentjim, May 2024GEG - SAN
Read more about Alaska Airlines reviews

Crew was outstanding. Flight was fine. Food was a joke! I didn't get the priority I paid for!! That pissed me off since I paid extra!!!

I liked the price of the 2 way tix. I hated having to pay $8.00 for Internet access. It should be free. Legroom and seats are very confining.

I fly Alaska regularly and they have great service. From boarding, in cabin to deplaning.

The one stewardess was rude about helping me put my bag in overhead….she said “ Is it heavy ?” (I am 73 yrs old)

The flight was about an hour late, and there was notable turbulence for a good part of it. But of course, that was not Alaska Air’s fault, and I think the crew did a good job of keeping it safe. Service suffered a little as a result (I wish I had been offered the option of purchasing food). Overall, it was ok, because we landed safe and sound. Thanks!

As a frequent traveler, I have found my recent experiences increasingly frustrating due to the frequent and drastic changes to my flight schedule with no prior notice. These unexpected changes have severely disrupted my travel plans, and the communication regarding these adjustments has been poor. Despite reaching out to customer service, the responses have been unsatisfactory, and no compensation was offered to address the inconvenience caused. I believe Alaska Airlines needs to significantly improve its handling of flight schedules, enhance communication with passengers, and provide better customer service to ensure a smoother travel experience.

Flight was delayed 2 hours. Other than that, it was a good flight.

The flight was late getting in, so many were stressed. The snacks for a LONG flight was not enough.

The whole experience went very well except the rest rooms were a disaster

Sat on tarmac for 30 minutes despite staring at three empty gates, one of which we eventually pulled into

Had to change aircraft due to a faulty door. Surprisingly it only caused about an hour and a half of delay. Delta handled this situation as well as can be expected.

Your crew could maybe answer the call bell at least one of the times I pressed it. I pressed it first time with 2.5 hours left in our flight bc my partner was hungry and wanted a sandwich. We finally got the sandwich with 40 mins left in the flight.

The Flight crew didn’t serve us until about 1.5 hours into the flight because of turbulence but after it ended it was fine to move around. They served us water only and snacks and then NEVER, NOT ONE TIME came through to collect trash until right before landing about 1.5 hours later. There was absolutely no need for that. They crew was just standing around talking and visiting with each other and really never tried to see if we might want something besides water or even try to come pick up trash. This is VERY unusual for a Delta flight but it was not what I would have expected for a 4 hour flight.

There was a loud squeaky sound the whole time we were flying.

Had a broken tray in business class. Crew just shrugged it off.

I didn’t like that I could not select my seat and was assigned a seat when I checked in at LAX

Great experience overall. Check in at Austin was congested as they only have about 6 check in kiosks, one was broken, and there was a lot of Spring Break travelers.

I was sitting at comfort +. One of the Asian male crew was so loud when he delivered service. When he asked questions or what food you need, he was shouting. He must be a prison guard before going Delta.

Bag drop off was slow and annoying. Only 2 agents at the entire delta desk, and no one directing traffic for what line to be in, many confused people slowed down the process. Boarding was fine. Seats in Delta comfort plus were fine. Snacks were great! Definitely a bonus. The entertainment system was awful — old, slow, not responsive, and completely unable to play games due to some kind of error. But on the other hand, thank you to Delta for the free WiFi. That made it better.

Everything was very good other than I had selected a specific seat when I booked the flight and they changed it once I checked-in the day before my flight. I was still in first class but lost my aisle seat for a window seat. Being tall, the aisle offers more comfort so I always select an aisle seat.

Everything was great except for one thing. I was sitting in seat 1L with plenty of windows. Because we couldn’t sit next to each other, my husband was in 2L with only one window that he had to almost turnhis neck around to look out. Therefore, the window position with 1/2 of the “window” seats in business class is not optimal

I was not expecting much as i was not in a premium cabin. I was pleasantly surprised that the seat in economy plus was spacious and food was ample. Party of 5 with 2 parents and 3 kids.

Outstanding in all respects. Early boarding left early arrived early. We were in business class, so was perfectly fine.

Dinner was okay but the breakfast was not eatable on the flight San Francisco to Zurich.

I really do not like the basic in basic economy.

Marked by flight delays on all segments of the trip. Food in first class cabin was mediocre and overhead cabin storage was not adequate. Overall, the premium charge for first class cabin was poor and over hyped. This will be our last flight with UA.

Check in etc was very good. As for on the plane, it was like flying in a freezer. It was so cold, i have flown for years and never been so cold on a plane. Staff on board said its always cold when flying which is a load of rubbish. They wouldnt put any heating on and now i have the flu because of this .

I’ve had a couple flights this week on United that were delayed by an hour or more

Should have video screens Plane audio was poor and without wired connection hard to understand crew. Should serve more than just cups of water and pretzels on six hour flight. Did not see crew rest of flight. Fix charging sockets to retain charging blocks.

My bag was lost with my medicine and I am very inconvenienced. I don’t know what happened, however I want you to do a better job on getting people’s bag back

My husband and I pre-ordered our food, but they did not have my husband’s order, and my cheese plate was very average. I asked for a blanket and was told they don’t carry blankets on domestic routs. The flight was on time and smooth!

There were delays on both ends. It made it less than excellent. This plane was great though

Everything was great except for the wifi was junk. Crew was super friendly and helpful

Attendants were rude. Scowling. Seats were miserable and we paid extra.

Somehow I got “offloaded” even though I had my boarding pass and was in transit Food is horrible Staff were nice and cheerful No headphones were provided on 11 hours flight

Fight crew was not very attentive and the bastions were gross!

Our flight was great we left Kona earlier and got into LAX almost an 1hour earlier as well. LAX AA is in repair so to get out and found our bus to get pick up was a bit confusing.

Plane was good but was delayed. probably not AA fault but caused a 1 hour delay. Seating was cramped.

The staff were very helpful with lots of refreshments on offer. The toilets were clean. The seats were comfortable and entertainment was good. No complaints, it was excellent.

amazing! they were so kind and allowed us to sit on empty seats so we could stretch our legs and sleep good. Food is amazing as well plus dessert in the middle of the flight!

Flight was delay 9hrs and nothing was provided at airport, had to go and get a room to sleep in, paid for Uber back and fort with no offers until we landed back home a 1hr later for a $75 voucher for a future flight.

Didn't like anything..entire crew was very rude to everyone on the flight. Plane old and the trays fall down on you the while time you're flying. Charged more for a carry on bag than for the plane ticket itself. Did make it from point a to point b, but worth the extra money to fly with another airline

9 hours of delay!! Was not able to check my luggage that I paid for!!!

It was delayed 9 hours for operational reasons, despite the plane arriving to the airport on time.

I am very disappointed with Frontier Airlines. They cancelled our flight because they couldn't find a crew member, and then didn't get us to our connecting flight. We had to cancel our whole vacation. We were promised flight and hotel vouchers, but they never sent them.

9hrs delay and didn’t provided anything until after flight landed $75 voucher for fiuture travel no meals or anything.

It was ridiculously hard to check in for the flight, and Frontier charged us a LOT of money to have a carry on suitcase, and then told everyone we could not carry on bags and had to check them through at the gate, and didn't refund the extra money we paid to have the suitcase as carry on.

I had a terrible experience with Frontier. I arrived before the 60 minute cut off and was told that Frontier has a two hour window for bags. I was then told the next available flight wasn’t until the end of the day (I had booked a 6am flight). I took a look around and saw other people being told that they could not board their flights or that they had to pay additional fees. I opted to rebook on American Airlines. There’s absolutely no straightforward way to contact Frontier, so this ticket was a complete waste of money. Oh - and the kicker is that the lady lied about the two hour cut off.

Frontier won’t help you at the airport without paying $25. Carry on was $75. Then you get on the plain and every beverage or snack is also a charge. Seats are hard and real packed in. I would never fly them again.

Worst experience I have seen. The flight was cancelled without any reason.

Book cheap flights from North America to Ontario

Recent round-trip flight deals

6/11Tue
nonstopFrontier
1h 23mSFO-ONT
6/18Tue
nonstopFrontier
1h 27mONT-SFO
$55
6/11Tue
nonstopFrontier
1h 23mSFO-ONT
6/12Wed
nonstopFrontier
1h 28mONT-SFO
$56
9/22Sun
nonstopUnited Airlines
1h 26mSFO-ONT
9/28Sat
nonstopUnited Airlines
1h 27mONT-SFO
$132
7/9Tue
nonstopAlaska Airlines
2h 33mSEA-ONT
7/13Sat
1 stopAlaska Airlines
5h 32mONT-SEA
$186
7/26Fri
1 stopDelta
6h 45mSEA-ONT
7/31Wed
nonstopDelta
2h 41mONT-SEA
$187
8/27Tue
1 stopDelta
5h 54mPDX-ONT
8/31Sat
1 stopDelta
6h 12mONT-PDX
$196
8/3Sat
1 stopAmerican Airlines
7h 24mORD-ONT
8/6Tue
1 stopAmerican Airlines
5h 39mONT-ORD
$198
7/13Sat
nonstopAlaska Airlines
2h 35mSEA-ONT
7/17Wed
1 stopAlaska Airlines
5h 32mONT-SEA
$216
8/14Wed
1 stopUnited Airlines
5h 15mDEN-ONT
8/17Sat
1 stopUnited Airlines
4h 54mONT-DEN
$232
8/9Fri
1 stopAmerican Airlines
6h 17mSFO-ONT
8/12Mon
1 stopAmerican Airlines
20h 34mONT-SFO
$247

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Recent one-way flight deals

6/9Sun
nonstopFrontier
1h 23mSFO-ONT
$40
7/13Sat
nonstopFrontier
2h 19mDEN-ONT
$40
8/6Tue
nonstopDelta
2h 47mSEA-ONT
$79
7/2Tue
1 stopDelta
5h 08mSEA-ONT
$88
7/1Mon
nonstopAmerican Airlines
3h 03mDFW-ONT
$95
9/24Tue
1 stopUnited Airlines
5h 03mSEA-ONT
$98
6/25Tue
1 stopAlaska Airlines
6h 14mPDX-ONT
$98
6/9Sun
1 stopAmerican Airlines
5h 42mORD-ONT
$99
7/2Tue
1 stopUnited Airlines
7h 24mDFW-ONT
$104
8/8Thu
1 stopAlaska Airlines
10h 00mDFW-ONT
$109

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Last minute flights from North America to Ontario

Last minute flight, train and bus deals

6/5Wed
nonstopFrontier
1h 23mSFO-ONT
6/12Wed
nonstopFrontier
1h 28mONT-SFO
$76
6/5Wed
nonstopFrontier
1h 23mSFO-ONT
6/11Tue
nonstopFrontier
1h 28mONT-SFO
$78
6/6Thu
multi-stopAmerican Airlines
7h 03mORD-ONT
6/9Sun
multi-stopAmerican Airlines
7h 58mONT-ORD
$260
6/6Thu
multi-stopDelta
11h 15mORD-ONT
6/10Mon
multi-stopDelta
10h 18mONT-ORD
$284
6/5Wed
multi-stopDelta
10h 18mJFK-ONT
6/12Wed
multi-stopDelta
9h 54mONT-JFK
$286
6/5Wed
multi-stopAmerican Airlines
5h 44mORD-ONT
6/9Sun
multi-stopAmerican Airlines
7h 58mONT-ORD
$322
6/4Tue
multi-stopUnited Airlines
6h 33mPDX-ONT
6/10Mon
multi-stopUnited Airlines
6h 15mONT-PDX
$404
6/5Wed
nonstopUnited Airlines
1h 35mSFO-ONT
6/8Sat
nonstopUnited Airlines
1h 25mONT-SFO
$446
6/6Thu
nonstopAlaska Airlines
2h 32mSEA-ONT
6/10Mon
nonstopAlaska Airlines
2h 45mONT-SEA
$467
6/5Wed
nonstopAlaska Airlines
2h 32mSEA-ONT
6/12Wed
multi-stopAlaska Airlines
4h 24mONT-SEA
$476

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Flights to Ontario

Destination:

Ontario (ONT)United States

Return flight deals:

Ontario - North America

Cabin classes:

$443
$478
$193
$35