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Find Cheap Flights from Ontario to San Francisco (ONT - SFO)

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Ontario to San Francisco Flight Information

Avg. Flight Duration 1h 27m
Flights Arrive in San Francisco
Flights Depart from Ontario
Flight Price $125
Distance 364 miles
Airlines United Airlines, American Airlines, Alaska Airlines, JetBlue

Good to Know

Low Season:
March
Best time to beat the crowds
2%
expected price decrease
High Season:
November
Most popular time to fly
8%
expected price increase
Average Price:
$280
(avg. price over the last 2 weeks)
Good Deal:
$231
or less (round trip)

When to Book Flights from Ontario to San Francisco

Estimated round-trip price
Average price per month
Flight prices as travel date approaches
-1 day
-2 days

Top Tips for Finding a Cheap Flight

Looking for a cheap flight? 25% of our users found flights on this route for $231 or less.
The cheapest flight from Ontario to San Francisco was found 26 days before departure, on average.
Book at least 2 weeks before departure in order to get a below-average price.
High season is considered to be October, November and December. The cheapest month to fly is March.
Morning departure is around 18% more expensive than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

FAQs for Booking Ontario to San Francisco Flights

How long does a flight from Ontario to San Francisco take?
An average nonstop flight takes 1h 23m, covering a distance of 364 miles.
How many flights are there between Ontario and San Francisco?
There are 143 (nonstop) flights between Ontario and San Francisco per week, averaging 20 per day.
Which airlines provide the cheapest flights from Ontario to San Francisco?
In the past 3 days, the cheapest round-trip tickets were found on United Airlines ($125), American Airlines ($190) and Alaska Airlines ($338).
Do I need a passport to fly between Ontario and San Francisco?
No.
Which airlines fly most frequently between Ontario and San Francisco?
United Airlines (9 times daily), Air Canada (8 times daily), Copa Airlines (2 times daily) are the most frequent flyers on this route.
What’s the cheapest day of the week to fly Ontario to San Francisco?
For Ontario to San Francisco, Tuesday is the cheapest day to fly on average and Saturday is the most expensive. Flying from San Francisco back to Ontario, the best deals are generally found on Monday, with Friday being the most expensive.
Which airports will I be using when flying from Ontario to San Francisco?
When flying out of Ontario you will be using Ontario, often referred to as Ontario Airport. You will be landing at San Francisco, also known as San Francisco Airport.

Book cheap flights from Ontario to San Francisco (round-trip)

Airports
Origin
Ontario
$125
only
$125
Destination
San Francisco
$125
only
$125
Tue, Jun 18
ONT
Ontario
SFO
San Francisco
1h 31m
Wed, Jun 19
SFO
San Francisco
ONT
Ontario
1h 29m
Trip: 2 days
6.0GoodShow reviews
Overall 6.0 Good
Based on 94 reviews
Overall
7.3
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.5
ONT
SFO
Good 6.0

Pros: What did I like like that the pilot let us know what was going on on every moment and the stewardess was very friendly

Cons: Seats very uncomfortable last flight 30 minute flight took an hour if not more and not knowing what gate my next flight is until I get there

ONT
SFO
Okay 4.0

Pros: We were not given seats together...

Cons: Busy and not well managed and we bought seats well in advance

SFO
MCO
Good 7.3

Pros: Crew were very hospitable. Seating and take off moved at a good pace

Cons: Entertainment was limited. Smaller plane / less space

ONT
SFO
Okay 5.3

Pros: Nice crew

Cons: Long wait for the flight delay, Long wait for take off, long wait pulling into gate. No outlet for rechargING phone, same on flight.

ONT
SFO
Okay 5.6

Cons: The plane landed to San Francisco earlier than scheduled, but we could not get off the plane due to the gate not available. We were stuck on plane for about half an hour and I really worried about making my connection. I hope such arrangements are conducted more smoothly.

Fri, May 10
ONT
Ontario
SFO
San Francisco
4h 15m
Mon, May 13
SFO
San Francisco
ONT
Ontario
6h 10m
Trip: 4 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 38,307 reviews
Overall
7.4
Boarding
7.5
Comfort
7.2
Crew
7.9
Entertainment
6.8
Food
6.7
MIA
ORF
Excellent 8.0

Cons: On time is always better, otherwise it was a good flight.

ABE
CLT
Good 7.0

Cons: Flight was very late

NRT
YVR
Excellent 9.3

Pros: I was with Japan airline and they were amazing crew and amazing service with very good food

Cons: The seats and entertainment could have been better

DFW
ELP
Excellent 10.0

Pros: On time

DTW
CLT
Excellent 9.6

Pros: Great crew and service

Fri, Jun 28
ONT
Ontario
SFO
San Francisco
1h 28m
Tue, Jul 2
SFO
San Francisco
ONT
Ontario
1h 28m
Trip: 5 days
6.0GoodShow reviews
Overall 6.0 Good
Based on 94 reviews
Overall
7.3
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.5
ONT
SFO
Mediocre 2.0

Pros: Nothing

Cons: Air Canada flight from Ontario to SFO was operated by United. Our flight was delayed by 2 hours and we ended up missing our connection. The customer service on the phone from both Air Canada and United would not take responsibility and continued to advise to call the other company to reschedule the flight. Not only did we miss our connection but our checked bag was rerouted onto another flight with no formal notification.

ONT
SFO
Mediocre 2.0

Pros: The fact that I got fully refunded, even though I still lost out on $500+.

Cons: My flight was supposed to leave at 12, and all that Kept happening was me receiving text messages about delays pushing my departure time back to 5:35pm. I missed a big birthday event I was throwing for my class that I teach, lost out on money spent for the event and missed out on all the memories made that night. I never got to leave, ended up cancelling my flight. What a waste of time. Seems to always happen when I fly through United.

ONT
SFO
Okay 5.3

Pros: Crew was helpful and friendly.

Cons: Flight got delayed and almost missed my connection.

MSP
EWR
Excellent 8.3

Cons: We were delayed for an hour sitting in the tarmac because of “VIP” which sucked

SFO
MCO
Good 7.3

Pros: Crew were very hospitable. Seating and take off moved at a good pace

Cons: Entertainment was limited. Smaller plane / less space

Sat, Jul 27
ONT
Ontario
SFO
San Francisco
1h 28m
Mon, Jul 29
SFO
San Francisco
ONT
Ontario
1h 28m
Trip: 3 days
6.0GoodShow reviews
Overall 6.0 Good
Based on 94 reviews
Overall
7.3
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.5
ONT
SFO
Mediocre 2.0

Cons: Both my connections were late. First over 2 hours, the second 45 min. The salad I spent $10 on was horrible. Overall just a bad experience with the airline- wish I could get my money back.

SFO
LHR
Excellent 9.0

Cons: Lots of united created problem create 2.5 hours delay

ONT
SFO
Excellent 10.0

Pros: It was on time And very convenient

ONT
SFO
Okay 5.6

Cons: The plane landed to San Francisco earlier than scheduled, but we could not get off the plane due to the gate not available. We were stuck on plane for about half an hour and I really worried about making my connection. I hope such arrangements are conducted more smoothly.

ONT
SFO
Okay 4.0

Pros: We were not given seats together...

Cons: Busy and not well managed and we bought seats well in advance

Thu, Aug 8
ONT
Ontario
SFO
San Francisco
1h 28m
Mon, Aug 12
SFO
San Francisco
ONT
Ontario
1h 29m
Trip: 5 days
6.0GoodShow reviews
Overall 6.0 Good
Based on 94 reviews
Overall
7.3
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.5
ONT
SFO
Mediocre 2.0

Cons: It never took off! They did not reschedule, they were not attentive, it was absolutely terrible.

ONT
SFO
Okay 4.0

Pros: Three hours late. No in flight snack since the weather was too bad for the flight attendant to bring a cart down the aisles. Pretty old plane, so kind of uncomfortable. But the staff was really nice and friendly for it being the holiday season, so they get all two stars.

ONT
SFO
Mediocre 2.0

Cons: It was delayed 3hrs!

ONT
SFO
Okay 4.3

Cons: 2 hour delay

ONT
SFO
Excellent 8.0

Pros: i was rebooked and am still on my way

Cons: i was delayed in ONT, making my flight an almost 24 hour trip from vONT to my destination. not fun had to reschedule car rental. luckily, they did not charge extra

Tue, Sep 17
ONT
Ontario
SFO
San Francisco
1h 30m
Tue, Sep 24
SFO
San Francisco
ONT
Ontario
1h 33m
Trip: 8 days
6.0GoodShow reviews
Overall 6.0 Good
Based on 94 reviews
Overall
7.3
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.5
ONT
SFO
Mediocre 2.0

Cons: It was delayed 3hrs!

ONT
SFO
Mediocre 2.0

Pros: The fact that I got fully refunded, even though I still lost out on $500+.

Cons: My flight was supposed to leave at 12, and all that Kept happening was me receiving text messages about delays pushing my departure time back to 5:35pm. I missed a big birthday event I was throwing for my class that I teach, lost out on money spent for the event and missed out on all the memories made that night. I never got to leave, ended up cancelling my flight. What a waste of time. Seems to always happen when I fly through United.

BOS
IAD
Okay 5.2

Cons: Reliability

ONT
SFO
Excellent 10.0

Pros: on time

ONT
SFO
Mediocre 2.0

Cons: No food 14 hrs of hunger!

Sun, Apr 28
ONT
Ontario
SFO
San Francisco
6h 00m
Wed, May 1
SFO
San Francisco
ONT
Ontario
7h 10m
Trip: 4 days
8.3ExcellentShow reviews
Overall 8.3 Excellent
Based on 26,547 reviews
Overall
8.5
Boarding
8.6
Comfort
8.3
Crew
8.8
Entertainment
7.9
Food
7.9
PDX
FAT
Excellent 9.0

Pros: Seats were good and staff too

Cons: The snacks at least for kids

SFO
SAN
Excellent 10.0

Pros: Fast flight

Cons: Blanket provided

MCO
PDX
Excellent 8.6

Pros: Was the seat super comfortable? Absolutely not. But no worse than any other flight.

Cons: We were seated behind a family, including an infant and two children under 4. The kids had no concept of “indoor voice” and were up and wired the entire flight; the parents abstaining from trying to keep them quieter. I believe I will get some sound-cancelling headphones For the next flight.

DCA
LAX
Excellent 8.0

Cons: Customer needs better control over their seat assignments.

SFO
SEA
Excellent 8.8

Pros: Great crew and seats were pretty comfortable.

Sat, Oct 5
ONT
Ontario
SFO
San Francisco
1h 30m
Wed, Oct 9
SFO
San Francisco
ONT
Ontario
1h 18m
Trip: 5 days
6.0GoodShow reviews
Overall 6.0 Good
Based on 94 reviews
Overall
7.3
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.5
ONT
SFO
Excellent 9.6

Pros: Ontario airport is so easy and convenient

YVR
LAX
Excellent 8.3

Pros: The crew, the speed (we arrived early), the boarding.

Cons: NA

ONT
SFO
Mediocre 2.0

Cons: Arrival time was delayed 2 hours and my itinerary fell apart. United could not assist me. I bought a ticket from Alaska Airlines from a different airport.to JFK.

ONT
SFO
Excellent 8.0

Pros: i was rebooked and am still on my way

Cons: i was delayed in ONT, making my flight an almost 24 hour trip from vONT to my destination. not fun had to reschedule car rental. luckily, they did not charge extra

SFO
LHR
Excellent 9.0

Cons: Lots of united created problem create 2.5 hours delay

Fri, Jul 19
ONT
Ontario
SFO
San Francisco
1h 31m
Mon, Jul 22
SFO
San Francisco
ONT
Ontario
1h 28m
Trip: 4 days
6.0GoodShow reviews
Overall 6.0 Good
Based on 94 reviews
Overall
7.3
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.5
ONT
SFO
Mediocre 2.0

Cons: My flight was delayed 3 hours and I was not informed of this until I arrived at the airport. United would not offer a refund and let me take a different airline. I missed a day of work and had to stay the night in San Francisco. United did pay for the hotel, but I am still displeased.

ONT
SFO
Mediocre 2.0

Cons: First my flight was cancelled. Then when they finally gave me a flight to San Francisco for my connecting flight they said that flight to seattle was delayed. Delayed to me is up to an hour. I waited for 3 hours past my scheduled take off time until my flight fonnaly took off. I have flown a lot in my life and this was by far the worst experience I've ever had on an airplane.

DCA
CLE
Mediocre 2.6

Pros: This was a horrible experience from the onsite until the landing.

Cons: Better communication from the beginning and feedback about what was actually going on would have been helpful.

OMA
ORD
Okay 5.3

Pros: My original flight and rebooked flight were both canceled, then this flight was delayed. Even with the extra time, we still sat on the runway because paperwork wasn't in order. It was just a mess.

Cons: I had to rebook my own flight and considering the plane was already delayed, it should have departed as soon as we left the gate.

ONT
SFO
Mediocre 2.0

Cons: No food 14 hrs of hunger!

Fri, Jun 14
ONT
Ontario
SFO
San Francisco
1h 28m
Sun, Jun 16
SFO
San Francisco
ONT
Ontario
1h 28m
Trip: 3 days
6.0GoodShow reviews
Overall 6.0 Good
Based on 94 reviews
Overall
7.3
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.5
ONT
SFO
Mediocre 2.0

Pros: The fact that I got fully refunded, even though I still lost out on $500+.

Cons: My flight was supposed to leave at 12, and all that Kept happening was me receiving text messages about delays pushing my departure time back to 5:35pm. I missed a big birthday event I was throwing for my class that I teach, lost out on money spent for the event and missed out on all the memories made that night. I never got to leave, ended up cancelling my flight. What a waste of time. Seems to always happen when I fly through United.

BJX
ORD
Excellent 10.0

Cons: Late start by approximately 30 minutes. Made up the entire 30 in the air. Smooth ride all the way!

ONT
SFO
Excellent 8.6

Pros: Easy, convenient and everyone is nice and accommodating. We always get to SFO under an hour

ONT
SFO
Excellent 10.0

Pros: It was on time And very convenient

YWG
DEN
Okay 4.6

Cons: The United App for entertainment would not work. It kept closing. The cabin was cold.

Sat, Aug 17
ONT
Ontario
SFO
San Francisco
14h 53m
Mon, Aug 19
SFO
San Francisco
ONT
Ontario
15h 37m
Trip: 3 days
8.2ExcellentShow reviews
Overall 8.2 Excellent
Based on 17,057 reviews
Overall
8.2
Boarding
8.3
Comfort
8.3
Crew
8.6
Entertainment
7.9
Food
7.8
BOS
BDA
Excellent 8.0

Pros: The crew was nice and always Love he snack offerings.

Cons: In flight entertainment did not consistently work.

JFK
LAX
Okay 4.3

Pros: One flight attendant was sweet and kind the other was rude the boarding crew was wonderful.

Cons: The older white lady was snarky for no reason to not just me idk if she was just cranky or what. My screen never worked the entire flight and the wifi was slow and shotty it was a harsh flight and I usually rave over jetblue idk what happened.

FLL
LGA
Okay 5.3

Cons: The TV plug fed out static volume and the TV worked randomly .. The Afro American flight attended gave a nasty attitude and didnt allow me to completely request my order as if she was in a rush

BOS
EWR
Excellent 10.0

Pros: Short but excellently-served flight to Newark.

ATL
FLL
Mediocre 3.0

Cons: Nobody speaks english. Announcement also in Portuguese. Very difficult for foreigners. Gate people are awful.

Sun, May 26
ONT
Ontario
SFO
San Francisco
1h 23m
Sun, Jun 16
SFO
San Francisco
ONT
Ontario
1h 28m
Trip: 22 days
6.0GoodShow reviews
Overall 6.0 Good
Based on 94 reviews
Overall
7.3
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.5
SFO
RDU
Excellent 8.0

Cons: It would have been great but they ran out of Buffalo Trace halfway through the flight - or that is the line from flight attendants

ONT
SFO
Excellent 10.0

Pros: Fast service!

EWR
FLL
Good 6.6

Cons: Serve some food. Our trip to EWR and back we just got a packet of pretzels. Not worth a $500 ticket!! Also could you guys please get with the times and update your media. What’s with this no pause and no record media player where you can only watch a movie if you so happen to switch the channel on t

ONT
SFO
Mediocre 2.0

Cons: Ticket agents did not communicate with passengers on why there was a delay and weren't willing to help passengers find alternate routes to their destination.

ONT
SFO
Good 7.3

Pros: All the flight attn. were great. The biggest problem on this flight was the small seats, head room, and overhead area for our carry ons. Other than that, plane was great.

Cons: Seats too small, and overhead storage very lmt. other than that all is fine.

Sat, May 18
ONT
Ontario
SFO
San Francisco
1h 23m
Sun, May 19
SFO
San Francisco
ONT
Ontario
1h 31m
Trip: 2 days
6.0GoodShow reviews
Overall 6.0 Good
Based on 94 reviews
Overall
7.3
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.5
ONT
SFO
Mediocre 2.0

Cons: Arrival time was delayed 2 hours and my itinerary fell apart. United could not assist me. I bought a ticket from Alaska Airlines from a different airport.to JFK.

ONT
SFO
Okay 4.0

Pros: We were not given seats together...

Cons: Busy and not well managed and we bought seats well in advance

ONT
SFO
Okay 4.3

Pros: Flight Attendants were nice.

Cons: The flight was expensive and they wouldn't let us or anyone place carry ons in the over head bin. It was an expensive ticket and didn't include checked bags ($25 more). Carry-ons wound up being "stowed". It would have been nice to know before I bought the tickets that I needed a smaller carry on.

ONT
SFO
Mediocre 2.0

Pros: Nothing

Cons: Air Canada flight from Ontario to SFO was operated by United. Our flight was delayed by 2 hours and we ended up missing our connection. The customer service on the phone from both Air Canada and United would not take responsibility and continued to advise to call the other company to reschedule the flight. Not only did we miss our connection but our checked bag was rerouted onto another flight with no formal notification.

ONT
SFO
Mediocre 2.0

Cons: Both my connections were late. First over 2 hours, the second 45 min. The salad I spent $10 on was horrible. Overall just a bad experience with the airline- wish I could get my money back.

Thu, May 30
ONT
Ontario
SFO
San Francisco
1h 23m
Sun, Jun 2
SFO
San Francisco
ONT
Ontario
1h 28m
Trip: 4 days
6.0GoodShow reviews
Overall 6.0 Good
Based on 94 reviews
Overall
7.3
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.5
YVR
LAX
Excellent 8.3

Pros: The crew, the speed (we arrived early), the boarding.

Cons: NA

ONT
SFO
Okay 4.3

Pros: Flight Attendants were nice.

Cons: The flight was expensive and they wouldn't let us or anyone place carry ons in the over head bin. It was an expensive ticket and didn't include checked bags ($25 more). Carry-ons wound up being "stowed". It would have been nice to know before I bought the tickets that I needed a smaller carry on.

ONT
SFO
Mediocre 2.0

Cons: My flight was delayed 3 hours and I was not informed of this until I arrived at the airport. United would not offer a refund and let me take a different airline. I missed a day of work and had to stay the night in San Francisco. United did pay for the hotel, but I am still displeased.

SFO
LHR
Excellent 9.0

Cons: Lots of united created problem create 2.5 hours delay

ONT
SFO
Excellent 8.6

Pros: Easy, convenient and everyone is nice and accommodating. We always get to SFO under an hour

Fri, Apr 26
ONT
Ontario
SFO
San Francisco
1h 23m
Wed, May 1
SFO
San Francisco
ONT
Ontario
1h 20m
Trip: 6 days
6.0GoodShow reviews
Overall 6.0 Good
Based on 94 reviews
Overall
7.3
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.5
ONT
SFO
Mediocre 2.0

Pros: The fact that I got fully refunded, even though I still lost out on $500+.

Cons: My flight was supposed to leave at 12, and all that Kept happening was me receiving text messages about delays pushing my departure time back to 5:35pm. I missed a big birthday event I was throwing for my class that I teach, lost out on money spent for the event and missed out on all the memories made that night. I never got to leave, ended up cancelling my flight. What a waste of time. Seems to always happen when I fly through United.

ONT
SFO
Mediocre 2.0

Pros: nothing totally a rip off

Cons: I paid 125 for my hockey bag. Flight was delayed but no email or anything. Changing my flight was miserable staff so rude and people on phones can barely speak

ONT
SFO
Mediocre 2.0

Cons: I paid good money to be back by 6am however I was delayed and had flights cancelled which made me get home 10 hours later than I should have. This was an overnight flight, so all the places to buy food were closed- United didn't offer snacks or blankets or really anything for the troubles. There were kids also stranded.

ONT
SFO
Excellent 10.0

Pros: Timely...and pilots updates of flight time

Cons: 3 stewardess slow service

ONT
SFO
Mediocre 2.0

Pros: Nothing

Cons: Air Canada flight from Ontario to SFO was operated by United. Our flight was delayed by 2 hours and we ended up missing our connection. The customer service on the phone from both Air Canada and United would not take responsibility and continued to advise to call the other company to reschedule the flight. Not only did we miss our connection but our checked bag was rerouted onto another flight with no formal notification.

Fri, Apr 26
ONT
Ontario
SFO
San Francisco
1h 23m
Sun, Apr 28
SFO
San Francisco
ONT
Ontario
1h 33m
Trip: 3 days
6.0GoodShow reviews
Overall 6.0 Good
Based on 94 reviews
Overall
7.3
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.5
ONT
SFO
Okay 4.0

Pros: The actual flying was fine

Cons: The delays over and over again , 1/2 hour at a time for 5 hours

ONT
SFO
Okay 5.3

Pros: Nice crew

Cons: Long wait for the flight delay, Long wait for take off, long wait pulling into gate. No outlet for rechargING phone, same on flight.

ONT
SFO
Okay 4.3

Cons: 2 hour delay

ONT
SFO
Mediocre 2.0

Pros: Plane was delayed over 2 & 1/2 hours for no apparent reason

ONT
SFO
Mediocre 2.0

Cons: No food 14 hrs of hunger!

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