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

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San Francisco to Ontario Flight Information

Avg. Flight Duration 1h 29m
Flights Arrive in Ontario
Flights Depart from San Francisco
Flight Price $231
Distance 363 miles
Airlines United, Alaska Airlines

Good to Know

Low Season:
January
Best time to beat the crowds
2%
expected price decrease
High Season:
June
Most popular time to fly
9%
expected price increase
Average Price:
$290
(avg. price over the last 2 weeks)
Good Deal:
$232
or less (round trip)

When to Book Flights from San Francisco to Ontario

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 $232 or less.
The cheapest flight from San Francisco to Ontario was found 76 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 May, June and July. The cheapest month to fly is January.
Morning departure is around 1% 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 San Francisco to Ontario Flights

How long does a flight from San Francisco to Ontario take?
An average nonstop flight takes 1h 18m, covering a distance of 363 miles.
How many flights are there between San Francisco and Ontario?
There are 144 (nonstop) flights between San Francisco and Ontario per week, averaging 20 per day.
Which airlines provide the cheapest flights from San Francisco to Ontario?
In the past 3 days, the cheapest round-trip tickets were found on United ($231) and Alaska Airlines ($282)
Do I need a passport to fly between San Francisco and Ontario?
No.
Which airlines fly most frequently between San Francisco and Ontario?
United (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 San Francisco to Ontario?
For San Francisco to Ontario, Wednesday is the cheapest day to fly on average and Tuesday is the most expensive. Flying from Ontario back to San Francisco, the best deals are generally found on Tuesday, with Friday being the most expensive.

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

Airports
Origin
San Francisco
$231
only
$231
Destination
Ontario
$231
only
$231
Wed, Sep 12
SFO
San Francisco
ONT
Ontario
1h 30m
Sun, Sep 16
ONT
Ontario
SFO
San Francisco
1h 26m
Trip: 5 days
6.8GoodShow reviews
Overall 6.8 Good
Based on 84 reviews
Overall
7.2
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.5
SFO
ONT
Mediocre 2.6

Late to board. Slow to run through safety. Late late late

SFO
ONT
Excellent 10.0

Although there was a slight delay, the flight was pleasant and the service very nice. We got twice something to drink and a snack. For the short flight, quite remarkable.

Everyting was fine

SFO
ONT
Mediocre 3.3

N/A

Kept me keep waiting for aircraft for 4 hours and toward the end told me that the flight got cancelled. Then they scheduled me to the 10:45pm flight, and the aircraft didn't come in till 12:40am. I've been waiting at the airport for more than 13 hours

SFO
ONT
Okay 4.0

Very uncomfortable seats, got delayed on the return trip again. Got home very late.

SFO
ONT
Excellent 8.3

Arrived a little early!

7/8 size Brazilian airplane.

Tue, Jan 29
SFO
San Francisco
ONT
Ontario
6h 15m
Fri, Feb 1
ONT
Ontario
SFO
San Francisco
6h 23m
Trip: 4 days
8.4ExcellentShow reviews
Overall 8.4 Excellent
Based on 22,683 reviews
Overall
8.6
Boarding
8.6
Comfort
8.3
Crew
8.9
Entertainment
7.9
Food
7.9
SEA
KTN
Excellent 8.3

Plenty of room. Food selection. Nice crew.

We were delayed for an hour.

SEA
IAH
Good 6.3

The flight crew was friendly

The flight was 1.5 hours late, the airport was full of people waiting for their flight. There’re no seating available at the gate, we have sit further away and that makes it hard to hear any announcement regarding the status of our flight.

STL
SEA
Excellent 10.0

Clean, newer plane on time with courteous professional staff. All went very well.

Not a thing.

KTN
JNU
Good 7.6

Short flight

Nothing to dislike.

DEN
SEA
Good 6.6

We were sitting in first class. My husband went to use the restroom in our cabin and the female flight attendant told him to go back behind the curtain and use the bathroom assigned to his cabinet. He is Colombian and she surely profiled him, as I saw two other passengers from coach use the first class bathroom with no concerns.

Mon, Sep 17
SFO
San Francisco
ONT
Ontario
1h 29m
Sun, Sep 23
ONT
Ontario
SFO
San Francisco
1h 26m
Trip: 7 days
6.8GoodShow reviews
Overall 6.8 Good
Based on 84 reviews
Overall
7.2
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.5
SFO
ONT
Excellent 8.0

It was a very small plane.

SFO
ONT
Excellent 10.0

Although there was a slight delay, the flight was pleasant and the service very nice. We got twice something to drink and a snack. For the short flight, quite remarkable.

Everyting was fine

SFO
ONT
Excellent 10.0

Great, friendly service Smooth flight

SFO
ONT
Excellent 10.0

Everything ran on time and the staff was very friendly.

SFO
ONT
Mediocre 3.3

N/A

Kept me keep waiting for aircraft for 4 hours and toward the end told me that the flight got cancelled. Then they scheduled me to the 10:45pm flight, and the aircraft didn't come in till 12:40am. I've been waiting at the airport for more than 13 hours

Sun, Sep 30
SFO
San Francisco
ONT
Ontario
1h 31m
Tue, Oct 9
ONT
Ontario
SFO
San Francisco
1h 27m
Trip: 10 days
6.8GoodShow reviews
Overall 6.8 Good
Based on 84 reviews
Overall
7.2
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.5
SFO
ONT
Excellent 8.0

It was a very small plane.

SFO
ONT
Excellent 10.0

Everything ran on time and the staff was very friendly.

SFO
ONT
Mediocre 3.3

The Crew attention was nice and very proffessional. Good coffee

We are very tired and the airplain isn't comfortable.

SFO
ONT
Excellent 10.0

Great, friendly service Smooth flight

SFO
ONT
Mediocre 3.3

N/A

Kept me keep waiting for aircraft for 4 hours and toward the end told me that the flight got cancelled. Then they scheduled me to the 10:45pm flight, and the aircraft didn't come in till 12:40am. I've been waiting at the airport for more than 13 hours

Tue, Oct 2
SFO
San Francisco
ONT
Ontario
1h 30m
Sat, Oct 6
ONT
Ontario
SFO
San Francisco
1h 27m
Trip: 5 days
6.8GoodShow reviews
Overall 6.8 Good
Based on 84 reviews
Overall
7.2
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.5
SFO
ONT
Excellent 8.3

the plane was cold early in the morning. I was feeling cold in the plane.

SFO
ONT
Mediocre 3.6

Plane wasn't full

Coffee grounds in the bottom of my cup Seats way too small for a normal person much less for Someone with extra.

SFO
ONT
Mediocre 2.6

Late to board. Slow to run through safety. Late late late

SFO
ONT
Mediocre 3.3

N/A

Kept me keep waiting for aircraft for 4 hours and toward the end told me that the flight got cancelled. Then they scheduled me to the 10:45pm flight, and the aircraft didn't come in till 12:40am. I've been waiting at the airport for more than 13 hours

SFO
ONT
Excellent 8.0

It was a very small plane.

Fri, Oct 5
SFO
San Francisco
ONT
Ontario
1h 29m
Mon, Oct 8
ONT
Ontario
SFO
San Francisco
1h 26m
Trip: 4 days
6.8GoodShow reviews
Overall 6.8 Good
Based on 84 reviews
Overall
7.2
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.5
SFO
ONT
Excellent 8.3

Arrived a little early!

7/8 size Brazilian airplane.

SFO
ONT
Mediocre 3.0

San Francisco to Ontario Delay for 10 min Then another dealy for 30 min After we board we had to waite inside the air craft for Cataring company to delever food for first classe

SFO
ONT
Mediocre 3.3

N/A

Kept me keep waiting for aircraft for 4 hours and toward the end told me that the flight got cancelled. Then they scheduled me to the 10:45pm flight, and the aircraft didn't come in till 12:40am. I've been waiting at the airport for more than 13 hours

SFO
ONT
Excellent 8.0

It was a very small plane.

SFO
ONT
Mediocre 3.6

Plane wasn't full

Coffee grounds in the bottom of my cup Seats way too small for a normal person much less for Someone with extra.

Thu, Nov 8
SFO
San Francisco
ONT
Ontario
1h 29m
Sun, Nov 11
ONT
Ontario
SFO
San Francisco
1h 29m
Trip: 4 days
6.8GoodShow reviews
Overall 6.8 Good
Based on 84 reviews
Overall
7.2
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.5
SFO
ONT
Excellent 10.0

Although there was a slight delay, the flight was pleasant and the service very nice. We got twice something to drink and a snack. For the short flight, quite remarkable.

Everyting was fine

SFO
ONT
Mediocre 2.6

Late to board. Slow to run through safety. Late late late

SFO
ONT
Mediocre 3.6

Plane wasn't full

Coffee grounds in the bottom of my cup Seats way too small for a normal person much less for Someone with extra.

SFO
ONT
Excellent 8.3

Arrived a little early!

7/8 size Brazilian airplane.

SFO
ONT
Mediocre 3.3

The Crew attention was nice and very proffessional. Good coffee

We are very tired and the airplain isn't comfortable.

Tue, Nov 20
SFO
San Francisco
ONT
Ontario
1h 29m
Fri, Nov 23
ONT
Ontario
SFO
San Francisco
1h 35m
Trip: 4 days
6.8GoodShow reviews
Overall 6.8 Good
Based on 84 reviews
Overall
7.2
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.5
SFO
ONT
Mediocre 3.3

The Crew attention was nice and very proffessional. Good coffee

We are very tired and the airplain isn't comfortable.

SFO
ONT
Excellent 8.3

the plane was cold early in the morning. I was feeling cold in the plane.

SFO
ONT
Mediocre 3.0

San Francisco to Ontario Delay for 10 min Then another dealy for 30 min After we board we had to waite inside the air craft for Cataring company to delever food for first classe

SFO
ONT
Excellent 8.3

Arrived a little early!

7/8 size Brazilian airplane.

SFO
ONT
Excellent 10.0

Everything ran on time and the staff was very friendly.

Sun, Dec 16
SFO
San Francisco
ONT
Ontario
1h 29m
Tue, Dec 25
ONT
Ontario
SFO
San Francisco
1h 35m
Trip: 10 days
6.8GoodShow reviews
Overall 6.8 Good
Based on 84 reviews
Overall
7.2
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.5
SFO
ONT
Okay 4.0

Very uncomfortable seats, got delayed on the return trip again. Got home very late.

SFO
ONT
Excellent 10.0

Although there was a slight delay, the flight was pleasant and the service very nice. We got twice something to drink and a snack. For the short flight, quite remarkable.

Everyting was fine

SFO
ONT
Excellent 10.0

Great, friendly service Smooth flight

SFO
ONT
Mediocre 3.3

The Crew attention was nice and very proffessional. Good coffee

We are very tired and the airplain isn't comfortable.

SFO
ONT
Mediocre 3.6

Plane wasn't full

Coffee grounds in the bottom of my cup Seats way too small for a normal person much less for Someone with extra.

Thu, Dec 20
SFO
San Francisco
ONT
Ontario
1h 18m
Fri, Jan 4
ONT
Ontario
SFO
San Francisco
1h 35m
Trip: 16 days
6.8GoodShow reviews
Overall 6.8 Good
Based on 84 reviews
Overall
7.2
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.5
SFO
ONT
Excellent 8.3

the plane was cold early in the morning. I was feeling cold in the plane.

SFO
ONT
Okay 4.0

Very uncomfortable seats, got delayed on the return trip again. Got home very late.

SFO
ONT
Mediocre 2.6

Late to board. Slow to run through safety. Late late late

SFO
ONT
Mediocre 3.3

The Crew attention was nice and very proffessional. Good coffee

We are very tired and the airplain isn't comfortable.

SFO
ONT
Excellent 10.0

Great, friendly service Smooth flight

Fri, Aug 31
SFO
San Francisco
ONT
Ontario
1h 30m
Mon, Sep 3
ONT
Ontario
SFO
San Francisco
1h 33m
Trip: 4 days
6.8GoodShow reviews
Overall 6.8 Good
Based on 84 reviews
Overall
7.2
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.5
SFO
ONT
Excellent 8.0

It was a very small plane.

SFO
ONT
Excellent 10.0

Although there was a slight delay, the flight was pleasant and the service very nice. We got twice something to drink and a snack. For the short flight, quite remarkable.

Everyting was fine

SFO
ONT
Mediocre 3.6

Plane wasn't full

Coffee grounds in the bottom of my cup Seats way too small for a normal person much less for Someone with extra.

SFO
ONT
Mediocre 3.3

N/A

Kept me keep waiting for aircraft for 4 hours and toward the end told me that the flight got cancelled. Then they scheduled me to the 10:45pm flight, and the aircraft didn't come in till 12:40am. I've been waiting at the airport for more than 13 hours

SFO
ONT
Mediocre 3.3

The Crew attention was nice and very proffessional. Good coffee

We are very tired and the airplain isn't comfortable.

Fri, Aug 31
SFO
San Francisco
ONT
Ontario
1h 30m
Mon, Sep 3
ONT
Ontario
SFO
San Francisco
1h 33m
Trip: 4 days
6.8GoodShow reviews
Overall 6.8 Good
Based on 84 reviews
Overall
7.2
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.5
SFO
ONT
Excellent 10.0

Great, friendly service Smooth flight

SFO
ONT
Mediocre 3.6

Plane wasn't full

Coffee grounds in the bottom of my cup Seats way too small for a normal person much less for Someone with extra.

SFO
ONT
Excellent 10.0

Although there was a slight delay, the flight was pleasant and the service very nice. We got twice something to drink and a snack. For the short flight, quite remarkable.

Everyting was fine

SFO
ONT
Mediocre 3.0

San Francisco to Ontario Delay for 10 min Then another dealy for 30 min After we board we had to waite inside the air craft for Cataring company to delever food for first classe

SFO
ONT
Okay 4.0

Very uncomfortable seats, got delayed on the return trip again. Got home very late.

Sat, Sep 1
SFO
San Francisco
ONT
Ontario
1h 30m
Mon, Sep 3
ONT
Ontario
SFO
San Francisco
1h 33m
Trip: 3 days
6.8GoodShow reviews
Overall 6.8 Good
Based on 84 reviews
Overall
7.2
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.5
SFO
ONT
Excellent 8.0

It was a very small plane.

SFO
ONT
Excellent 8.3

the plane was cold early in the morning. I was feeling cold in the plane.

SFO
ONT
Excellent 8.3

Arrived a little early!

7/8 size Brazilian airplane.

SFO
ONT
Mediocre 2.6

Late to board. Slow to run through safety. Late late late

SFO
ONT
Excellent 10.0

Although there was a slight delay, the flight was pleasant and the service very nice. We got twice something to drink and a snack. For the short flight, quite remarkable.

Everyting was fine

Sat, Aug 25
SFO
San Francisco
ONT
Ontario
1h 30m
Sun, Sep 9
ONT
Ontario
SFO
San Francisco
1h 34m
Trip: 16 days
6.8GoodShow reviews
Overall 6.8 Good
Based on 84 reviews
Overall
7.2
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.5
SFO
ONT
Excellent 8.0

It was a very small plane.

SFO
ONT
Mediocre 3.3

N/A

Kept me keep waiting for aircraft for 4 hours and toward the end told me that the flight got cancelled. Then they scheduled me to the 10:45pm flight, and the aircraft didn't come in till 12:40am. I've been waiting at the airport for more than 13 hours

SFO
ONT
Mediocre 3.0

San Francisco to Ontario Delay for 10 min Then another dealy for 30 min After we board we had to waite inside the air craft for Cataring company to delever food for first classe

SFO
ONT
Okay 4.0

Very uncomfortable seats, got delayed on the return trip again. Got home very late.

SFO
ONT
Mediocre 3.3

The Crew attention was nice and very proffessional. Good coffee

We are very tired and the airplain isn't comfortable.

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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.

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