Find cheap flights from Ontario to San Francisco

ONT - SFO

Find cheap flights from Ontario to San Francisco

Round-trip
Economy
Ontario (ONT)
San Francisco
Wed 5/27
Wed 6/3
Any month
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Good to know

Low season

March Best time to beat the crowds with an average 28% drop in price.

High season

November Most popular time to fly with an average 29% increase in price.

Average price of a round-trip

$132 (avg. price over the last 2 weeks)

Good deal for a round-trip

$148 or less

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 $138 or less.
  • The cheapest flight from Ontario to San Francisco was found 31 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 March.
  • Morning departure is around 1,000% 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

Are flight prices cheaper from Ontario to San Francisco because of Coronavirus (COVID-19)?

How long does a flight from Ontario to San Francisco take?

How many flights are there between Ontario and San Francisco?

Which airlines provide the cheapest flights from Ontario to San Francisco?

Do I need a passport to fly between Ontario and San Francisco?

Which airlines fly most frequently between Ontario and San Francisco?

What’s the cheapest day of the week to fly Ontario to San Francisco?

Which airports will I be using when flying from Ontario to San Francisco?

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

Airports
Origin
Ontario
$151
only
$151
Destination
San Francisco
$151
only
$151
Wed, Aug 5
ONT
Ontario Airport
SFO
San Francisco Airport
1h 30m
Wed, Aug 5
SFO
San Francisco Airport
ONT
Ontario Airport
7h 06m
Trip: 1 days
Based on 0 reviews
Tue, Jun 16
ONT
Ontario Airport
SFO
San Francisco Airport
1h 22m
Tue, Jun 23
SFO
San Francisco Airport
ONT
Ontario Airport
5h 54m
Trip: 8 days
Based on 0 reviews
Fri, Jun 12
ONT
Ontario Airport
SFO
San Francisco Airport
7h 08m
Sun, Jun 14
SFO
San Francisco Airport
ONT
Ontario Airport
1h 21m
Trip: 3 days
Based on 0 reviews
Mon, Jun 1
ONT
Ontario Airport
SFO
San Francisco Airport
1h 36m
Tue, Jun 9
SFO
San Francisco Airport
ONT
Ontario Airport
5h 54m
Trip: 9 days
Based on 0 reviews
Sun, May 31
ONT
Ontario Airport
SFO
San Francisco Airport
1h 36m
Sun, Jun 7
SFO
San Francisco Airport
ONT
Ontario Airport
6h 24m
Trip: 8 days
Based on 0 reviews
Thu, Jun 4
ONT
Ontario Airport
SFO
San Francisco Airport
1h 22m
Sun, Jun 7
SFO
San Francisco Airport
ONT
Ontario Airport
5h 54m
Trip: 4 days
Based on 0 reviews
Fri, Jun 26
ONT
Ontario Airport
SFO
San Francisco Airport
12h 18m
Sun, Jun 28
SFO
San Francisco Airport
ONT
Ontario Airport
35h 33m
Trip: 3 days
Based on 0 reviews
Mon, Jun 1
ONT
Ontario Airport
SFO
San Francisco Airport
6h 38m
Wed, Jun 3
SFO
San Francisco Airport
ONT
Ontario Airport
1h 33m
Trip: 3 days
Based on 0 reviews
Thu, May 28
ONT
Ontario Airport
SFO
San Francisco Airport
1h 36m
Mon, Jun 1
SFO
San Francisco Airport
ONT
Ontario Airport
6h 24m
Trip: 5 days
Based on 0 reviews
Mon, Jun 1
ONT
Ontario Airport
SFO
San Francisco Airport
6h 38m
Tue, Jun 2
SFO
San Francisco Airport
ONT
Ontario Airport
1h 33m
Trip: 2 days
Based on 0 reviews
Fri, Aug 21
ONT
Ontario Airport
SFO
San Francisco Airport
1h 23m
Mon, Aug 24
SFO
San Francisco Airport
ONT
Ontario Airport
7h 33m
Trip: 4 days
Based on 0 reviews
Thu, May 28
ONT
Ontario Airport
SFO
San Francisco Airport
1h 36m
Sun, May 31
SFO
San Francisco Airport
ONT
Ontario Airport
8h 15m
Trip: 4 days
Based on 0 reviews
Sat, Jun 27
ONT
Ontario Airport
SFO
San Francisco Airport
12h 18m
Sun, Jun 28
SFO
San Francisco Airport
ONT
Ontario Airport
20h 14m
Trip: 2 days
Based on 0 reviews
Fri, Jun 19
ONT
Ontario Airport
SFO
San Francisco Airport
7h 08m
Thu, Jun 25
SFO
San Francisco Airport
ONT
Ontario Airport
1h 21m
Trip: 7 days
Based on 0 reviews
Thu, May 28
ONT
Ontario Airport
SFO
San Francisco Airport
1h 36m
Mon, Jun 1
SFO
San Francisco Airport
ONT
Ontario Airport
6h 24m
Trip: 5 days
Based on 0 reviews
Sat, Jun 27
ONT
Ontario Airport
SFO
San Francisco Airport
1h 22m
Tue, Jun 30
SFO
San Francisco Airport
ONT
Ontario Airport
4h 40m
Trip: 4 days
Based on 0 reviews
Mon, May 25
ONT
Ontario Airport
SFO
San Francisco Airport
8h 01m
Thu, Jun 4
SFO
San Francisco Airport
ONT
Ontario Airport
1h 21m
Trip: 11 days
Based on 0 reviews
Thu, Jul 2
ONT
Ontario Airport
SFO
San Francisco Airport
12h 44m
Mon, Jul 13
SFO
San Francisco Airport
ONT
Ontario Airport
12h 52m
Trip: 12 days
8.2Excellent Show reviews
Overall 8.2 Excellent
Based on 19,139 reviews
Overall
8.2
Boarding
8.3
Comfort
8.3
Crew
8.6
Entertainment
7.9
Food
7.8
BOS
SJU
Excellent 8.6

Cons: COVID19 is over.

PDX
JFK
Okay 5.3

Cons: They delayed the flight because of a mechanical issue now I have layover for 12 hours

PVD
PBI
Okay 5.3

Pros: Good entertainment

Cons: Leg room!

ATL
BOS
Okay 5.3

Cons: Boarding members kept me for no reason to my Cary on bag

BOS
PHL
Good 6.0

Cons: Delayed 4 hours

Thu, Sep 24
ONT
Ontario Airport
SFO
San Francisco Airport
14h 48m
Mon, Sep 28
SFO
San Francisco Airport
ONT
Ontario Airport
14h 58m
Trip: 5 days
8.2Excellent Show reviews
Overall 8.2 Excellent
Based on 19,139 reviews
Overall
8.2
Boarding
8.3
Comfort
8.3
Crew
8.6
Entertainment
7.9
Food
7.8
SJU
JFK
Excellent 10.0

Cons: Todo fue Exelente...

JFK
JAX
Good 7.6

Cons: This is more of a complaint about another customer. Allowing travelers to take three bags of chips while the rest of the plane is waiting. It was rude and inconsiderate of that customer. They run out of certain flavors. I just need some plain pretzels. She then took 2 more later. The attendant did grab another bag of pretzels and returned Ed later. I’ve been on other flights (other airlines) in which the attendant has said no to seconds unless some remaining at the end.

BOS
FLL
Excellent 10.0

Pros: everything excellent except tv didn't work well

FLL
LAS
Excellent 10.0

Pros: Extra leg room

Cons: A business class

EWR
PBI
Excellent 8.0

Pros: Very helpful, very considerate.

Cons: Better ventilation, less announcements.

Thu, Aug 20
ONT
Ontario Airport
SFO
San Francisco Airport
12h 44m
Sun, Aug 23
SFO
San Francisco Airport
ONT
Ontario Airport
15h 02m
Trip: 4 days
8.2Excellent Show reviews
Overall 8.2 Excellent
Based on 19,139 reviews
Overall
8.2
Boarding
8.3
Comfort
8.3
Crew
8.6
Entertainment
7.9
Food
7.8
SFO
LGB
Excellent 8.6

Pros: Crew was friendly and accomodating

Cons: On board entertainment was poor at best

LGB
LAS
Excellent 10.0

Pros: It was very quick

LAX
JFK
Excellent 9.6

Cons: Despite the delay of almost 3 hours (which we were informed much earlier than getting to the airport at) the plane was 40% empty so can’t complain at the end of the day

BOS
SAN
Excellent 10.0

Pros: Great flight! Excellent legroom and connectivity. Flight crew was wonderful.

RDU
BOS
Okay 5.6

Pros: Great crew!

Cons: Very small tray table space. Carry on fee should have been easier to see during purchase. If I'd noticed, I would have planned differently.

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Book cheap flights from Ontario to San Francisco (one-way)

Airports
Origin
Ontario
$42
only
$42
Destination
San Francisco
$42
only
$42
Tue, Jun 30
ONT
Ontario Airport
SFO
San Francisco Airport
1h 22m
8.1Excellent Show reviews
Overall 8.1 Excellent
Based on 27,664 reviews
Overall
8.1
Boarding
8.1
Comfort
7.9
Crew
8.5
Entertainment
7.7
Food
7.6
FRA
LAX
Poor 0.0

Pros: nothing really. There were so many rude staff members at this airline. I saw people get yelled at by staff members. They were just trying to get information on the late flights and missed connections. It happened repeatedly. this company has the worst customer service I have seen probably ever.

Cons: They need to care about their customers and care for their customers better. They have a lot to be ashamed of.

CLT
MUC
Excellent 10.0

Pros: This is how my trip started that day. Missed my checkin window by 10 mins do to waiting in traffic for 45 mins, because of wreck. Got to the ticket counter at 8:35 and my flight my was set to take of at 9:30. There wear others in the same boat as me, we where all flying with American. I will Never ever fly with American again! The Lady was so rude then she said we were disgrutle when we ask to speak to a manger about trying to board even though or flight didnt leave until 9:30. Not Military Friendly at all. So I ran down to Lufthansa and talk with a guy at the ticket counter that was understanding of the sistuation, he told me what to do once a Book my trip through Kayak he checked me in and got me right to the front and on the plane for the next flight that left 2 hours after my missed flight. I book my trip and got through Tsa all before my flight with american even took off. When I boared the plane the cabin crew was very helpful and laughing and joking with the passagners their smiles brighten my day and made me feel at easy. I was stressed out about missing my flight with American Airlines and that lady at the ticket counter that when on got my flight with Lufthanse I felt like they were my friends and that I have been flying with them before. I will always use Lufthansa when fliying back home back to the states! Thank you to flight crew and men and women at the ticket counters!!

Cons: If I could change one thing it would be better food, or the drink protion size or just give out canned drinks. But over all the best flight I have taken in a long time!!

BLR
FRA
Mediocre 2.0

Pros: Inflight services

Cons: Delayed flight, missed connecting flight due to that. On the ground staff should have better coordinated from arrival to boarding of next flight. Chaotic and short staffed security personnel at Frankfurt airport. Overall a pathetic experience

FRA
BEG
Excellent 9.0

Cons: It was good enough.

CDG
FRA
Excellent 10.0

Pros: Very friendly crew, very clean cabin, very comfortable seats

Tue, Jun 30
ONT
Ontario Airport
SFO
San Francisco Airport
1h 22m
8.2Excellent Show reviews
Overall 8.2 Excellent
Based on 8,958 reviews
Overall
8.2
Boarding
8.3
Comfort
7.9
Crew
8.7
Entertainment
7.8
Food
8.0
FCO
ZRH
Excellent 8.3

Pros: Great attentive crew.

Cons: Boarding has no groups, seats are small

BOS
ZRH
Good 7.6

Pros: The crew was friendly and helpful.

Cons: The aircraft looked new. However the seat widths seemed small. Awkward recline as well. The seats were just not comfortable.

BCN
ZRH
Excellent 10.0

Pros: Everything from the crew being super accomodating and friendly to the comfort and taste of the food was delicious.

BCN
ZRH
Mediocre 3.0

Pros: Nothing

Cons: Time schedule Better customer services

TLV
ZRH
Excellent 8.0

Pros: All was Good, no special negatives.

Cons: Not worth my time to comment.

Mon, Jul 20
ONT
Ontario Airport
SFO
San Francisco Airport
38h 05m
Based on 0 reviews
Wed, Jul 1
ONT
Ontario Airport
SFO
San Francisco Airport
15h 16m
8.2Excellent Show reviews
Overall 8.2 Excellent
Based on 19,139 reviews
Overall
8.2
Boarding
8.3
Comfort
8.3
Crew
8.6
Entertainment
7.9
Food
7.8
PBI
EWR
Excellent 9.6

Pros: Other than the expected delay, the food, entertainmentand comfort were excellent. I definitely enjoyed flying jetblue

Cons: The delays with jet blue up out of Florida are to be expected- happens each time

MCO
PVD
Excellent 9.2

Pros: The extra leg room was great!

JFK
LGB
Excellent 10.0

Pros: Disregarding all that’s going on around the world in present time out experience was great

SJU
FLL
Excellent 10.0

Cons: .

ATL
BOS
Okay 5.3

Cons: Boarding members kept me for no reason to my Cary on bag

Mon, Jul 20
ONT
Ontario Airport
SFO
San Francisco Airport
15h 16m
8.2Excellent Show reviews
Overall 8.2 Excellent
Based on 19,139 reviews
Overall
8.2
Boarding
8.3
Comfort
8.3
Crew
8.6
Entertainment
7.9
Food
7.8
MCO
BOS
Okay 5.6

Cons: Time...8 hours late

LAX
FLL
Mediocre 2.0

Cons: Two very sick people were allowed to fly and were not denied boarding during these times of Covid19. We actually had to taxi back to terminal to remove a very sick passenger. JetBlue #100 March 17, 2020 10:12 pm from Los Angeles to Fort Lauderdale.

MCO
PVD
Excellent 9.2

Pros: The extra leg room was great!

NAS
BOS
Excellent 10.0

Pros: Friendly attendant helped me get seats with my daughter together. Everyone was very nice and polite.

Cons: Everything was great for this trip

SJU
FLL
Excellent 10.0

Cons: .

Fri, Jul 24
ONT
Ontario Airport
SFO
San Francisco Airport
15h 16m
8.2Excellent Show reviews
Overall 8.2 Excellent
Based on 19,139 reviews
Overall
8.2
Boarding
8.3
Comfort
8.3
Crew
8.6
Entertainment
7.9
Food
7.8
SEA
BOS
Excellent 10.0

Pros: Jet blue was amazing. They bit only upgraded my seats but they took care of what Hawaiian airlines refused to do due to the virus. Hawaiian cancled my flight home with no notification or warning. Jet blue picked up where they failed and not only rebooked my flight home for me, but contacted Hawaiian on my behalf so it would not cost me any more money. Jet blue was amazing

BOS
PHL
Okay 4.5

Pros: The flight was fine.

Cons: Racist flight attendant targeted only 3 black people on the flight for chairs, bags, etc... But the people right next to us on either side received no reprimand. Terrible exclusionary actions.

BOS
SEA
Excellent 9.0

Pros: Wonderful crew, comfortable seating in coach!

SJU
MCO
Excellent 10.0

Pros: Very grateful for this airline. Staff with their due precautions. The seating area was clean, the food was light (but it is understood by the situation that we are going through Covid 19). All in order.

Cons: I only found that they must be a little more rigorous with the rules of keeping distance when entering and leaving the plane.

LGA
BOS
Excellent 9.5

Pros: Efficient boarding, reasonable space in cabin and overhead bins

Sat, Jun 13
ONT
Ontario Airport
SFO
San Francisco Airport
2h 34m
$1691
Based on 0 reviews
Sat, Jun 13
ONT
Ontario Airport
SFO
San Francisco Airport
8h 23m
$1695
Based on 0 reviews
Tue, Jun 16
ONT
Ontario Airport
SFO
San Francisco Airport
8h 23m
$2657
Based on 0 reviews
Tue, Jun 30
ONT
Ontario Airport
SFO
San Francisco Airport
8h 23m
$2660
Based on 0 reviews
Tue, Jun 30
ONT
Ontario Airport
SFO
San Francisco Airport
2h 34m
$2661
Based on 0 reviews
Tue, Jun 16
ONT
Ontario Airport
SFO
San Francisco Airport
2h 34m
$2662
Based on 0 reviews
Tue, Jun 30
ONT
Ontario Airport
SFO
San Francisco Airport
10h 19m
$2663
Based on 0 reviews
Tue, Jun 30
ONT
Ontario Airport
SFO
San Francisco Airport
2h 34m
$2665
Based on 0 reviews
Tue, Jun 30
ONT
Ontario Airport
SFO
San Francisco Airport
2h 34m
$2668
Based on 0 reviews
Sun, Jul 5
ONT
Ontario Airport
SFO
San Francisco Airport
2h 34m
$2686
Based on 0 reviews
Sun, Jul 5
ONT
Ontario Airport
SFO
San Francisco Airport
8h 23m
$2690
Based on 0 reviews
Tue, May 26
ONT
Ontario Airport
SFO
San Francisco Airport
2h 34m
$2691
Based on 0 reviews
Thu, Jun 18
ONT
Ontario Airport
SFO
San Francisco Airport
2h 34m
$2694
Based on 0 reviews
Tue, May 26
ONT
Ontario Airport
SFO
San Francisco Airport
8h 23m
$2695
Based on 0 reviews
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*
Prices are per person and are for e–tickets and include all taxes & fees in USD.

We attempt to get accurate prices, however, prices are not guaranteed.

Here's why:

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At KAYAK we don’t set the prices, so it’s not possible for us to guarantee what other companies are selling.

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If you have more questions or if you have a bad price to report to us,
please send us an and someone from our team will get back to you promptly.

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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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