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 $142
Distance 364 miles
Airlines American Airlines, United Airlines, Frontier, Alaska Airlines, JetBlue

Good to Know

Low Season:
October
Best time to beat the crowds
2%
expected price decrease
High Season:
November
Most popular time to fly
0%
expected price increase
Average Price:
$269
(avg. price over the last 2 weeks)
Good Deal:
$229
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 $228 or less.
The cheapest flight from Ontario to San Francisco was found 80 days before departure, on average.
Book at least 3 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 October.
Morning departure is around 6% 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 18m, covering a distance of 364 miles.
How many flights are there between Ontario and San Francisco?
There are 166 (nonstop) flights between Ontario and San Francisco per week, averaging 24 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 American Airlines ($142), United Airlines ($235) and Frontier ($261).
Do I need a passport to fly between Ontario and San Francisco?
No.
Which airlines fly most frequently between Ontario and San Francisco?
Air Canada (9 times daily), United Airlines (9 times daily), Copa Airlines (4 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, Friday is the cheapest day to fly on average and Monday is the most expensive. Flying from San Francisco back to Ontario, the best deals are generally found on Tuesday, with Saturday 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
$142
only
$142
Destination
San Francisco
$142
only
$142
Fri, Jan 11
ONT
Ontario
SFO
San Francisco
6h 46m
Sat, Jan 12
SFO
San Francisco
ONT
Ontario
6h 06m
Trip: 2 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 35,815 reviews
Overall
7.4
Boarding
7.5
Comfort
7.2
Crew
7.8
Entertainment
6.8
Food
6.7
ICT
ORD
Mediocre 2.0

Cons: Poor they lost my luggage. They did not allowed me to take my suitcas whit me because the plan was too small. I never travel again whit amercan airlines

ROC
CLT
Good 6.0

Pros: The airlines don't allow enough room to sit comfortably. I am 6' 2" 250 lbs. My knees touch the back of the seat in front of me and there is no room side to side. Very uncomfortable.

GSP
CLT
Okay 4.0

Pros: Seats

Cons: WiFi was weak...things were stolen out of my carry on checked at the gate in Charlotte...I had the only bag checked at the gate.

JFK
DCA
Good 7.5

Pros: It was quick.

Cons: Flying these days is no better than taking a local bus.

AKL
LAX
Excellent 10.0

Pros: I was in business class and the individual cubicles were so comfortable. I slept well. The airline attendant was so attentive and helpful

Cons: Going through LAX what a mess

Thu, Jan 31
ONT
Ontario
SFO
San Francisco
1h 28m
Tue, Feb 5
SFO
San Francisco
ONT
Ontario
1h 27m
Trip: 6 days
6.0GoodShow reviews
Overall 6.0 Good
Based on 93 reviews
Overall
7.2
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.5
ONT
SFO
Okay 5.6

Pros: Que acomoden a las parejas juntas.

Cons: Asiento incomodo

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

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
Excellent 9.6

Pros: Ontario airport is so easy and convenient

ONT
SFO
Okay 5.3

Pros: Crew was helpful and friendly.

Cons: Flight got delayed and almost missed my connection.

Tue, Jan 15
ONT
Ontario
SFO
San Francisco
6h 19m
Mon, Jan 21
SFO
San Francisco
ONT
Ontario
15h 48m
Trip: 7 days
5.7OkayShow reviews
Overall 5.7 Okay
Based on 36,441 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.6
Food
4.7
TPA
ORD
Excellent 10.0

Pros: Service, on time flight.

DEN
CLT
Excellent 10.0

Pros: The price! Non stop

DEN
ORD
Mediocre 2.0

Pros: Nothing

Cons: Waiting for 2+ hours at the gate waiting for the plane to leave.

AUS
LAS
Excellent 8.0

Cons: Had to wait at the gate on the plane for 50 minutes when we landed. Another plane was there. Not good at all!!

LAS
GEG
Okay 5.6

Pros: Direct flight

Cons: Not really a negative thing to say

Fri, Mar 8
ONT
Ontario
SFO
San Francisco
20h 30m
Mon, Mar 11
SFO
San Francisco
ONT
Ontario
9h 40m
Trip: 3 days
8.4ExcellentShow reviews
Overall 8.4 Excellent
Based on 24,909 reviews
Overall
8.6
Boarding
8.6
Comfort
8.3
Crew
8.9
Entertainment
7.9
Food
7.9
LAX
EWR
Excellent 10.0

Pros: First time on Alaska. Smooth flight, quick boarding and deboarding.

PHX
PDX
Excellent 10.0

Pros: Friendly helpful staff

BWI
SAN
Excellent 10.0

Cons: Smooth sailing no issues

SFO
SEA
Excellent 10.0

Pros: Consistently reliable, very helpful and friendly. Comfortable seats, efficient on and off plane. Every employee on the plane or telephone had gone above and beyond to be helpful.

ANC
SEA
Excellent 10.0

Pros: Comfortable seats, for a sardine can, but that is a given these super efficient cramming of people on the plane days. But the seats were clean and comfortable, the flight crew was professional, and the trip uneventful.

Cons: Bigger seats are probably to much to hope for...

Thu, Mar 21
ONT
Ontario
SFO
San Francisco
4h 01m
Tue, Apr 2
SFO
San Francisco
ONT
Ontario
4h 33m
Trip: 13 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 35,815 reviews
Overall
7.4
Boarding
7.5
Comfort
7.2
Crew
7.8
Entertainment
6.8
Food
6.7
ORD
LHR
Excellent 9.0

Pros: The crew was excellent!

Cons: I think quality of food Is not the same as it used to be. I travel frequently to Europe and breakfast served was not really anything special.

ROC
CLT
Good 6.0

Pros: The airlines don't allow enough room to sit comfortably. I am 6' 2" 250 lbs. My knees touch the back of the seat in front of me and there is no room side to side. Very uncomfortable.

PHL
DUB
Excellent 10.0

Pros: Boarding was very smooth crew was very pleasant and helpful

ORD
LGA
Mediocre 2.0

Cons: They lost my luggage. They did not allow me to take her whit me in the plane because i did not fit a suitcase that always travel on top because is small suitcase terrible I will never travel again with amercan airlines

RSW
DFW
Okay 4.6

Cons: On both segments of the trip American changed my seat which I. I’d not realize until boarding. Way to late to protest. You pay for preferred seating but then get bumped to a lousy seat with no explanation. Likely because I was a single traveler and an American employee wanted my seat. Better not happen on the return flight

Fri, Feb 1
ONT
Ontario
SFO
San Francisco
1h 35m
Sun, Feb 3
SFO
San Francisco
ONT
Ontario
1h 27m
Trip: 3 days
6.0GoodShow reviews
Overall 6.0 Good
Based on 93 reviews
Overall
7.2
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.5
ONT
SFO
Okay 5.6

Pros: Que acomoden a las parejas juntas.

Cons: Asiento incomodo

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
Good 6.0

Cons: flight was delayed. tug car didn’t work

ONT
SFO
Mediocre 2.6

Pros: I liked nothing about my flights.

Cons: I hated that my first flight was delayed a whole day and I had to fly out of a different airport to get to eugene. To add coming home I tried to upgrade my flight to Ontario to an earlier time and they refused to do so and said it would cost $75. I felt the least the airline could do was let me fly home an hour earlier since they delayed my flight a whole day but that didn't happen.

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.

Fri, Feb 15
ONT
Ontario
SFO
San Francisco
1h 28m
Mon, Feb 18
SFO
San Francisco
ONT
Ontario
1h 27m
Trip: 4 days
6.0GoodShow reviews
Overall 6.0 Good
Based on 93 reviews
Overall
7.2
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.5
ONT
SFO
Excellent 8.6

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

ONT
SFO
Mediocre 2.0

Pros: Flight attendants tried but could not change situation

Cons: I losr one of two days- moving furniture Have to stay up another night to getready

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 5.3

Pros: Crew was helpful and friendly.

Cons: Flight got delayed and almost missed my connection.

ONT
SFO
Excellent 10.0

Pros: on time

Sat, Apr 6
ONT
Ontario
SFO
San Francisco
1h 35m
Sun, Apr 7
SFO
San Francisco
ONT
Ontario
1h 18m
Trip: 2 days
6.0GoodShow reviews
Overall 6.0 Good
Based on 93 reviews
Overall
7.2
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
Okay 5.3

Pros: Crew was helpful and friendly.

Cons: Flight got delayed and almost missed my connection.

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
Mediocre 2.0

Pros: Flight attendants tried but could not change situation

Cons: I losr one of two days- moving furniture Have to stay up another night to getready

ONT
SFO
Okay 5.6

Pros: Que acomoden a las parejas juntas.

Cons: Asiento incomodo

Thu, May 16
ONT
Ontario
SFO
San Francisco
1h 35m
Mon, May 20
SFO
San Francisco
ONT
Ontario
1h 27m
Trip: 5 days
6.0GoodShow reviews
Overall 6.0 Good
Based on 93 reviews
Overall
7.2
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.5
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

ONT
SFO
Excellent 9.6

Pros: Ontario airport is so easy and convenient

ONT
SFO
Okay 5.6

Pros: Que acomoden a las parejas juntas.

Cons: Asiento incomodo

ONT
SFO
Good 6.0

Cons: flight was delayed. tug car didn’t work

ONT
SFO
Mediocre 2.6

Pros: I liked nothing about my flights.

Cons: I hated that my first flight was delayed a whole day and I had to fly out of a different airport to get to eugene. To add coming home I tried to upgrade my flight to Ontario to an earlier time and they refused to do so and said it would cost $75. I felt the least the airline could do was let me fly home an hour earlier since they delayed my flight a whole day but that didn't happen.

Fri, May 10
ONT
Ontario
SFO
San Francisco
6h 14m
Sun, May 12
SFO
San Francisco
ONT
Ontario
1h 27m
Trip: 3 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 35,815 reviews
Overall
7.4
Boarding
7.5
Comfort
7.2
Crew
7.8
Entertainment
6.8
Food
6.7
JFK
DCA
Good 7.5

Pros: It was quick.

Cons: Flying these days is no better than taking a local bus.

GSP
CLT
Okay 4.0

Pros: Seats

Cons: WiFi was weak...things were stolen out of my carry on checked at the gate in Charlotte...I had the only bag checked at the gate.

BNA
LAX
Excellent 8.8

Pros: there was an open seat between aisle and window seat!!! however I did pay extra $40 for that seat. so nice to be able to move without constantly knocking into person sitting smashed next to you! great AA crew, polite & professional. on time departure and arrival. comfortable cabin, seats

Cons: would be nice to have individual entertainment screen - instead it was above every few seats

ORD
LGA
Mediocre 2.0

Cons: They lost my luggage. They did not allow me to take her whit me in the plane because i did not fit a suitcase that always travel on top because is small suitcase terrible I will never travel again with amercan airlines

ICT
ORD
Mediocre 2.0

Cons: Poor they lost my luggage. They did not allowed me to take my suitcas whit me because the plan was too small. I never travel again whit amercan airlines

Wed, Jun 5
ONT
Ontario
SFO
San Francisco
1h 18m
Sat, Jun 15
SFO
San Francisco
ONT
Ontario
1h 18m
Trip: 11 days
6.0GoodShow reviews
Overall 6.0 Good
Based on 93 reviews
Overall
7.2
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.5
ONT
SFO
Okay 5.3

Pros: Crew was helpful and friendly.

Cons: Flight got delayed and almost missed my connection.

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 5.6

Pros: Que acomoden a las parejas juntas.

Cons: Asiento incomodo

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.

Mon, Jun 17
ONT
Ontario
SFO
San Francisco
14h 50m
Wed, Jun 19
SFO
San Francisco
ONT
Ontario
15h 39m
Trip: 3 days
8.2ExcellentShow reviews
Overall 8.2 Excellent
Based on 15,028 reviews
Overall
8.2
Boarding
8.3
Comfort
8.3
Crew
8.6
Entertainment
7.9
Food
7.8
LGA
PBI
Excellent 10.0

Cons: Everything

EWR
RSW
Excellent 10.0

Pros: Crew was very friendly and accommodating.

LAS
LGB
Excellent 10.0

Pros: Plenty of leg room. Very comfortable

Cons: N/A

DAB
JFK
Excellent 10.0

Pros: Boarding and on time departure

Cons: Nothing

BQN
JFK
Excellent 10.0

Pros: All attention

Cons: No comment

Sun, Dec 23
ONT
Ontario
SFO
San Francisco
1h 28m
Fri, Dec 28
SFO
San Francisco
ONT
Ontario
1h 27m
Trip: 6 days
6.0GoodShow reviews
Overall 6.0 Good
Based on 93 reviews
Overall
7.2
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
Okay 5.6

Pros: Que acomoden a las parejas juntas.

Cons: Asiento incomodo

ONT
SFO
Mediocre 2.0

Pros: Flight attendants tried but could not change situation

Cons: I losr one of two days- moving furniture Have to stay up another night to getready

ONT
SFO
Mediocre 2.6

Pros: I liked nothing about my flights.

Cons: I hated that my first flight was delayed a whole day and I had to fly out of a different airport to get to eugene. To add coming home I tried to upgrade my flight to Ontario to an earlier time and they refused to do so and said it would cost $75. I felt the least the airline could do was let me fly home an hour earlier since they delayed my flight a whole day but that didn't happen.

ONT
SFO
Excellent 8.6

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

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The fares displayed include all taxes and fees for economy class travel and were found by the provider in the last 72 hours. Seats are limited and may not be available on all flights and days. Fares are subject to change and may not be available on all flights or dates of travel. Some carriers charge additional fees for extra checked bags. Please check the carriers' sites.