Frontier's Premium Bundle offers priority boarding and extra legroom for just $20 more than Economy.
Avoid middle seats by selecting Economy Bundle for free Standard seat selection and carry-on bag.
Planning a trip from San Francisco to Ontario? KAYAK’s data-powered insights will help you find cheap flights. Learn the best time to fly, how early to book your ticket, and other tips to secure great prices.
Low season | February |
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High season | November |
Cheapest flight | $28 |
Find which airlines fly direct from San Francisco Airport to Ontario Airport, which days they fly and book direct flights.
Direct departures
San Francisco to Ontario
Monday
Air Canada, Emirates, Frontier, +1 more
Air Canada, Emirates, +2 more
1
Tuesday
Air Canada, Emirates, United Airlines
Air Canada, Emirates, +1 more
Wednesday
Air Canada, Emirates, United Airlines
Air Canada, Emirates, +1 more
Thursday
Air Canada, Emirates, United Airlines
Air Canada, Emirates, +1 more
Friday
Air Canada, Emirates, Frontier, +1 more
Air Canada, Emirates, +2 more
1
Saturday
Air Canada, Emirates, United Airlines
Air Canada, Emirates, +1 more
Sunday
Air Canada, Emirates, Frontier, +1 more
Air Canada, Emirates, +2 more
1
Direct returns
Ontario to San Francisco
Monday
Air Canada, Copa Airlines, Emirates, +2 more
Air Canada, Copa Airlines, +3 more
1
2
Tuesday
Air Canada, Copa Airlines, Emirates, +1 more
Air Canada, Copa Airlines, +2 more
1
Wednesday
Air Canada, Copa Airlines, Emirates, +1 more
Air Canada, Copa Airlines, +2 more
1
Thursday
Air Canada, Copa Airlines, Emirates, +1 more
Air Canada, Copa Airlines, +2 more
1
Friday
Air Canada, Copa Airlines, Emirates, +2 more
Air Canada, Copa Airlines, +3 more
1
2
Saturday
Air Canada, Copa Airlines, Emirates, +1 more
Air Canada, Copa Airlines, +2 more
1
Sunday
Air Canada, Copa Airlines, Emirates, +2 more
Air Canada, Copa Airlines, +3 more
1
2
Flight last minute delayed 2 hours for crew calling out sick
Flight last minute delayed 2 hours for crew calling out sick
Great, overall. Thicker seat cushion would be nice. My butt hurt the whole flight.
Thicker seat cushion would be nice. My butt hurt the whole flight.
All good! No entertainment on this new plane yet but ok for this short flight. Great on time flight! Thanks
No non-alcoholic drinks available except water and small apple juice cans.
Alaska Airlines needs more bag tag kiosks and bag check-in stations in Seattle. A single entry point for the bag tag kiosks would be helpful. This alleviates lines forming at each individual kiosk, which causes traffic jams for people passing through.
The flight was delayed over two and a half hours thus causing me to miss my best friend’s funeral. All because the flight crew had to get more rest. That was the reason stated. I understand however very unfortunate. Glad everyone is well rested and resting in peace.
All good except both the outbound and return flights were delayed about 1 1/2 hrs.
Not great. My flight was canceled due to a mechanical problem and I could not get rebooked for the same day. I needed to get to my destination yesterday, not today. I was able to book with another airline but it was a layover and ultimately a 1 hour flight took me 12 hours. Normally I like Alaska much more than Southwest, but Southwest came through with a not terrible price for same day.
The plane was late arriving. The Alaska people did a great job of turning it around quickly and getting us off. We took off about 35 minutes after it reached the gate.
This had nothing to do with Delta… The flights were on time and flawless. The service was excellent. We purchased seats in (aisle/middle) comfort plus since this was a cross country flight. Unfortunately, the woman seated at the window was 300+ pounds and, as might be expected, covered up about a third of the middle seat also. there was absolutely nothing that Delta could have done about that… I just don’t know what the answer should be. If you purchase a seat, you should should be able to use the entire seat and not just the portion that someone else is not sitting/oozing in. Disappointing…there should be something that could be done….I'm just not sure what solution could be.
Thank you for not flipping the plane on the run way. You guys get a 5 star rating for the flight!!!
Seats are much much more comfortable than United, which is what I usually fly
Boarding is, as it always is… horrible. Gate lice. Slow moving zones. Too many people with carry ons
If I pay extra for "comfort+" I expect leg room where I can stretch my legs. I was seated with an attendant's seat blocking my feet. Knee space was fine but my feet had less room than the non-"comfort+" seats. Also, don't go cheap on food when you have flights of 3+ hours. It's insulting.
Only one side of the heafphone jack work. Crew was friendly and helpful.
Great. Flight departed early and arrived early. Deplaning and baggage claim ww were quick.
They separated our seats and moved us to the back of the plane. Hundreds of dollars and thousands of miles used and this was my platinum member experience.
New boarding doesn't make sense. Filling front first is slow.
AC barely worked on a 50 minute flight. It was very warm the whole flight. Flight was very bumpy and hard landing.
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
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. 👍👍
Compared with other carriers business class for an overnight was not worth the extra expense.
Easy to board. Flight was super crowded though so I didn't sleep well on that cross country red-eye flight. The aisles seem ot have gotten narrower and the seat smaller whn luggage and people are getting bigger so it would be AWESOME to have more space and breathing room in general ;)
Pilot Erika DeLong made us feel safe and at ease in a frankly scary time to be flying. Her warm smile and greeting and excellent command of the aircraft in foggy bumpy weather helped us all to calm our nerves and get us home safely.
hahaha we are delayed for one hour plus.. but thx we arrived San Diego safe
Worst airline ever! The guy weighing my bag had his foot on the metal plate and when I called him out on it, I got this stupid little smirk. La is a scam and so is Spirit Airlines. All the flight attendants looked like they hated our flight just as much as we did.
Unclear pricing; ended up being charged an extra $52 just to get onboard
Spirit is awful. Too expensive for what you get. Stop nickel and diming.
would be great to get basic water, soda at least and stop charging for carry ons
Your crew is a representation of your Standards and Values. The crew from Seattle to LAX, was very disappointing. The crew was more interested in hanging out at the lobby area. Talking, laughing loudly and eating all the snacks. They did not do regular rounds to see if customers needed anything. This was a huge disappointment. I will no longer be flying with your airlines moving forward.
- flight attendants not very friendly. - Paid for WiFi and plane didn’t have it working , never got a refund.
We got to fly on the new airplane. Much better as it’s roomier and cleaner than before. Most Importantly it’s much more comfortable. I still can’t move the seat back but the extra space made up for it. I didn’t taste the food or drinks because they charge for everything so I didn’t bother. I didn’t experience the entertainment because I downloaded my own movies on my phone. The crew was great. The flight itself was smooth . No complaints.
I was comfortable because I upgraded. I would not have been comfortable in economy. It was a short flight so there was limited food service and no inflight entertainment.
I thought since I upgraded my seat I would get some perks. Free water, free snacks. Free carry on luggage.
The seats were hard molded plastic covered in plastic vinyl. And the scam to charge people extra to sit together. Don’t they know we can just ask someone to trade seats. And watching the staff separate young children from parents… super classy. We had to guilt them into offering up our seats. This companies policies suck. Don’t give them your money.
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.
Everything went as planned. Crew was great. Seats were still not that comfortable.
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.
The plane was clean, the crew was friendly and helpful. It’s a low cost airline so there was no food, drinks or in flight entertainment but we didn’t expect any of these things. In the room for improvement department, they should install USB ports in seats to charge mobile devices.
I was surprised that all baggage, including carry on, were charged. Each additional bag went up in cost. Really disappointed in the additional costs.
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.
Charges unexpected. For seat that didnt recline. Please reverse extra seat and carryon charge. Bad business that is a bait and switch.
I couldn’t check in because the app didn’t work. It took 3 Frontier employees at the counter to get me checked in. Flight left 3 hours after departure time
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