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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 26m
Flights Arrive in San Francisco
Flights Depart from Ontario
Flight Price $231
Distance 363 miles
Airlines United Airlines, Alaska Airlines, JetBlue

Good to Know

Low Season:
December
Best time to beat the crowds
2%
expected price decrease
High Season:
September
Most popular time to fly
4%
expected price increase
Average Price:
$291
(avg. price over the last 2 weeks)
Good Deal:
$230
or less (round trip)

When to Book Flights from Ontario to San Francisco

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 $230 or less.
The cheapest flight from Ontario to San Francisco was found 82 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 August, September and October. The cheapest month to fly is December.
Morning departure is around 69% 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 363 miles.
How many flights are there between Ontario and San Francisco?
There are 219 (nonstop) flights between Ontario and San Francisco per week, averaging 32 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 ($231), Alaska Airlines ($420) and JetBlue ($576).
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 (13 times daily), Air Canada (11 times daily), Copa Airlines (6 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 Tuesday is the most expensive. Flying from San Francisco back to Ontario, the best deals are generally found on Friday, with Friday being the most expensive.

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

Airports
Origin
Ontario
$231
only
$231
Destination
San Francisco
$231
only
$231
Fri, Nov 2
ONT
Ontario
SFO
San Francisco
1h 35m
Sun, Nov 4
SFO
San Francisco
ONT
Ontario
1h 27m
Trip: 3 days
6.0GoodShow reviews
Overall 6.0 Good
Based on 92 reviews
Overall
7.2
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.5
ONT
SFO
Mediocre 2.0

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

Nothing

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
Excellent 9.6

Ontario airport is so easy and convenient

ONT
SFO
Excellent 8.6

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

ONT
SFO
Mediocre 2.6

I liked nothing about my flights.

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.

Wed, Mar 13
ONT
Ontario
SFO
San Francisco
9h 05m
Tue, Mar 19
SFO
San Francisco
ONT
Ontario
16h 09m
Trip: 7 days
8.4ExcellentShow reviews
Overall 8.4 Excellent
Based on 23,839 reviews
Overall
8.6
Boarding
8.6
Comfort
8.3
Crew
8.9
Entertainment
7.9
Food
7.9
SEA
LAX
Excellent 10.0

Being in the service industry I completely understand how important customer service is! Alaskan airlines have asked their staff to use the customers name as much as possible. It was great to see that when I was borning my name was used. This was not an ordinary monotone thank you that every single person gets. The “ Have a nice flight and Thank you for flying with us”, was cheerful and upbeat and I was greeted with a smile. During my flight the customers names were used as they were asking to take orders as well as passing out food as though you were known person to them. I am not a regular flyer, I did not use my credit card, the fact that they used my name means Alaskan has a trick to the trade that others don’t.. I am not a regular flyer, I did not use my credit card, my flight attendants knew my name. What an amazing experience.

RDM
SEA
Good 6.0

Food was excellent. Staff was friendly.

My luggage is missing. Did not arrive with me to Budapest. Many many important things are missing and cannot be replaced. Please help!!

SEA
GEG
Good 6.8

Flight attendants kind and understanding.

Mechanical issues making nearly an hour delay.

SEA
ORD
Good 7.3

Free movies was great.

Missing luggage. Please help

PDX
SAN
Mediocre 2.0

I was not able to cancel my flight or receive a refund. I didn't go.

Fri, Nov 30
ONT
Ontario
SFO
San Francisco
1h 29m
Sun, Dec 2
SFO
San Francisco
ONT
Ontario
1h 27m
Trip: 3 days
6.0GoodShow reviews
Overall 6.0 Good
Based on 92 reviews
Overall
7.2
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.5
ONT
SFO
Mediocre 2.0

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

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

Crew was helpful and friendly.

Flight got delayed and almost missed my connection.

ONT
SFO
Okay 5.6

Que acomoden a las parejas juntas.

Asiento incomodo

ONT
SFO
Excellent 8.0

i was rebooked and am still on my way

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 8.6

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

Sat, Dec 29
ONT
Ontario
SFO
San Francisco
1h 28m
Wed, Jan 2
SFO
San Francisco
ONT
Ontario
1h 27m
Trip: 5 days
6.0GoodShow reviews
Overall 6.0 Good
Based on 92 reviews
Overall
7.2
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.5
ONT
SFO
Okay 5.3

Crew was helpful and friendly.

Flight got delayed and almost missed my connection.

ONT
SFO
Mediocre 2.6

I liked nothing about my flights.

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 9.6

Ontario airport is so easy and convenient

ONT
SFO
Excellent 8.6

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

ONT
SFO
Okay 5.6

Que acomoden a las parejas juntas.

Asiento incomodo

Thu, Jan 10
ONT
Ontario
SFO
San Francisco
1h 31m
Sat, Jan 26
SFO
San Francisco
ONT
Ontario
1h 31m
Trip: 17 days
6.0GoodShow reviews
Overall 6.0 Good
Based on 92 reviews
Overall
7.2
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.5
ONT
SFO
Mediocre 2.6

I liked nothing about my flights.

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

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

I liked how quick and easy the flight was; from boarding to exiting the plane in SFO.

The size of the plane.

ONT
SFO
Excellent 10.0

on time

ONT
SFO
Okay 5.6

Que acomoden a las parejas juntas.

Asiento incomodo

Fri, Feb 22
ONT
Ontario
SFO
San Francisco
15h 06m
Sun, Feb 24
SFO
San Francisco
ONT
Ontario
12h 30m
Trip: 3 days
8.2ExcellentShow reviews
Overall 8.2 Excellent
Based on 13,751 reviews
Overall
8.2
Boarding
8.3
Comfort
8.3
Crew
8.6
Entertainment
7.9
Food
7.8
MSY
BOS
Excellent 10.0

Everything. Flight attendants were wonderful and friendly, plenty of entertainment in flight, free WiFi, comfy spacious seats.

Nothing. Just perfect. I will never fly any other airlines

JFK
SDQ
Excellent 10.0

Smooth flight. We left earlier than expected and arrived 30 minutes before expected arrival. Everything was smooth.

MCO
ATL
Excellent 10.0

Convenience

TPA
BOS
Excellent 9.3

Very professional, friendly crew. Lots of turbulence but captain and crew kept us well informed. Usual comfortable seats and screen entertainment. Clean cabin. Took off and landed on time.

Overhead bins held very small items and several jackets that should have been assigned to under seat areas. Crew seemed to be in the area and monitoring, but it made zone 3 overhead storage a challenge to find space in an inconvenient area.

DFW
BOS
Excellent 8.0

one hour delay

Sat, Feb 16
ONT
Ontario
SFO
San Francisco
1h 35m
Sun, Feb 17
SFO
San Francisco
ONT
Ontario
1h 18m
Trip: 2 days
6.0GoodShow reviews
Overall 6.0 Good
Based on 92 reviews
Overall
7.2
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.5
ONT
SFO
Excellent 8.0

i was rebooked and am still on my way

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 2.6

I liked nothing about my flights.

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 9.6

Ontario airport is so easy and convenient

ONT
SFO
Excellent 8.0

I liked how quick and easy the flight was; from boarding to exiting the plane in SFO.

The size of the plane.

ONT
SFO
Okay 5.3

Crew was helpful and friendly.

Flight got delayed and almost missed my connection.

Fri, Mar 15
ONT
Ontario
SFO
San Francisco
1h 18m
Sat, Mar 16
SFO
San Francisco
ONT
Ontario
1h 18m
Trip: 2 days
6.0GoodShow reviews
Overall 6.0 Good
Based on 92 reviews
Overall
7.2
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.5
ONT
SFO
Excellent 8.6

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

ONT
SFO
Excellent 8.0

I liked how quick and easy the flight was; from boarding to exiting the plane in SFO.

The size of the plane.

ONT
SFO
Mediocre 2.0

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

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

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

Flight attendants tried but could not change situation

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

Thu, Oct 25
ONT
Ontario
SFO
San Francisco
1h 27m
Sun, Oct 28
SFO
San Francisco
ONT
Ontario
1h 27m
Trip: 4 days
6.0GoodShow reviews
Overall 6.0 Good
Based on 92 reviews
Overall
7.2
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.5
ONT
SFO
Mediocre 2.0

Nothing

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 2.6

I liked nothing about my flights.

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 8.0

I liked how quick and easy the flight was; from boarding to exiting the plane in SFO.

The size of the plane.

ONT
SFO
Mediocre 2.0

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

Flight attendants tried but could not change situation

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

Fri, Oct 26
ONT
Ontario
SFO
San Francisco
1h 26m
Sun, Oct 28
SFO
San Francisco
ONT
Ontario
1h 27m
Trip: 3 days
6.0GoodShow reviews
Overall 6.0 Good
Based on 92 reviews
Overall
7.2
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.5
ONT
SFO
Mediocre 2.0

Nothing

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
Excellent 8.6

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

ONT
SFO
Okay 5.6

Que acomoden a las parejas juntas.

Asiento incomodo

ONT
SFO
Okay 5.3

Crew was helpful and friendly.

Flight got delayed and almost missed my connection.

ONT
SFO
Excellent 8.0

I liked how quick and easy the flight was; from boarding to exiting the plane in SFO.

The size of the plane.

Sat, Oct 20
ONT
Ontario
SFO
San Francisco
1h 26m
Sun, Oct 21
SFO
San Francisco
ONT
Ontario
1h 27m
Trip: 2 days
6.0GoodShow reviews
Overall 6.0 Good
Based on 92 reviews
Overall
7.2
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.5
ONT
SFO
Okay 5.6

Que acomoden a las parejas juntas.

Asiento incomodo

ONT
SFO
Mediocre 2.0

Flight attendants tried but could not change situation

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

ONT
SFO
Mediocre 2.0

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

I liked how quick and easy the flight was; from boarding to exiting the plane in SFO.

The size of the plane.

ONT
SFO
Excellent 10.0

on time

Sun, Feb 17
ONT
Ontario
SFO
San Francisco
1h 35m
Thu, Feb 21
SFO
San Francisco
ONT
Ontario
5h 41m
Trip: 5 days
6.0GoodShow reviews
Overall 6.0 Good
Based on 92 reviews
Overall
7.2
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.5
ONT
SFO
Excellent 8.0

i was rebooked and am still on my way

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

Nothing

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
Excellent 10.0

on time

ONT
SFO
Okay 5.3

Crew was helpful and friendly.

Flight got delayed and almost missed my connection.

ONT
SFO
Excellent 9.6

Ontario airport is so easy and convenient

Tue, Nov 20
ONT
Ontario
SFO
San Francisco
14h 56m
Fri, Nov 23
SFO
San Francisco
ONT
Ontario
16h 07m
$1515
Trip: 4 days
8.2ExcellentShow reviews
Overall 8.2 Excellent
Based on 13,751 reviews
Overall
8.2
Boarding
8.3
Comfort
8.3
Crew
8.6
Entertainment
7.9
Food
7.8
JFK
SDQ
Excellent 10.0

Smooth flight. We left earlier than expected and arrived 30 minutes before expected arrival. Everything was smooth.

MCO
ATL
Excellent 10.0

Convenience

LAX
JFK
Good 7.3

The flight itself was fine. Food pricey but good enough. Seats are comfortable. WiFi is intermittent. Cabin crew basically OK.

Contradictory and incomplete texts about a 1.25 hour delay in departure time. Text should say to arrive at original time. Almost missed the flight because text did not say that. Got 2 different texts within minutes, one with incorrect info. Why did I have TSA Pre-Check status on the originating flight but not on the return flight? Not enough overhead space, and cabin crew wasn’t helpful in finding space. Flight 30 minutes late, but probably not JetBlue‘s fault.

DFW
BOS
Excellent 8.0

one hour delay

SJU
DCA
Good 6.6

Smooth flight, take off and landing. Plenty of leg room.

The seats on my row didn't properly recline or at all. The crew was not great but not bad, maybe average service

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