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Cheap flights from Ontario to San Francisco from $28

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to San Francisco departing on 12/19. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Ontario to San Francisco

Cheap round-trip flights

These are some of the best round-trip flight deals from Ontario to San Francisco that have been recently found on momondo from popular airlines, departing in the coming months.

Cheap one-way flights

Flying one-way? These are some of the best deals recently discovered on momondo for flights from Ontario to San Francisco.

Cheap last minute flights

Planning a quick getaway from Ontario to San Francisco? These are the last-minute flight deals available now.

Cheap direct flights

If you prefer a non-stop journey, check out our latest direct flight deals to San Francisco, so you can enjoy a seamless trip without layovers.

Cheap bus & train deals from Ontario to San Francisco

Find recent round-trip train or bus tickets from Ontario to San Francisco.

All round-trip flight deals to San Francisco

The cheapest plane tickets to San Francisco found on KAYAK recently.
6:00 am - 7:35 amONT-SFO
1h 35mnonstop
9:59 pm - 11:23 pmSFO-ONT
1h 24mnonstop
$56Frontier
Find Deal
Fri, Jan 10 - Mon, Jan 13
6:00 am - 7:35 amONT-SFO
1h 35mnonstop
9:59 pm - 11:23 pmSFO-ONT
1h 24mnonstop
$57Frontier
Find Deal
Fri, Jan 10 - Fri, Jan 10
6:00 am - 7:35 amONT-SFO
1h 35mnonstop
9:59 pm - 11:24 pmSFO-ONT
1h 25mnonstop
$58Frontier
Find Deal
Fri, Jan 24 - Fri, Jan 24
7:05 am - 8:34 amONT-SFO
1h 29mnonstop
4:32 pm - 6:00 pmSFO-ONT
1h 28mnonstop
$59Frontier
Find Deal
Sun, Dec 8 - Mon, Dec 9
6:45 am - 8:20 amONT-SFO
1h 35mnonstop
9:59 pm - 11:24 pmSFO-ONT
1h 25mnonstop
$62Frontier
Find Deal
Sun, Jan 19 - Mon, Jan 20
8:26 am - 10:02 amONT-SFO
1h 36mnonstop
8:06 am - 9:34 amSFO-ONT
1h 28mnonstop
$66Frontier
Find Deal
Fri, Feb 21 - Sun, Feb 23
10:35 am - 12:08 pmONT-SFO
1h 33mnonstop
8:25 am - 9:51 amSFO-ONT
1h 26mnonstop
$159United Airlines
Find Deal
Sun, Dec 15 - Sat, Jan 18
6:28 pm - 8:01 pmONT-SFO
1h 33mnonstop
10:35 pm - 11:58 pmSFO-ONT
1h 23mnonstop
$174United Airlines
Find Deal
Wed, Dec 18 - Wed, Dec 18
6:00 am - 3:13 pmONT-SFO
9h 13m2 stops
9:10 pm - 9:39 amSFO-ONT
12h 29m1 stop
Wed, Dec 11 - Thu, Dec 12
6:00 am - 4:07 pmONT-SFO
10h 07m2 stops
8:00 am - 5:04 pmSFO-ONT
9h 04m1 stop
$227Alaska Airlines
Find Deal
Tue, Feb 11 - Wed, Feb 12
7:47 pm - 9:18 pmONT-SFO
1h 31mnonstop
$28Frontier
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Thu, Dec 19
7:36 am - 9:02 amONT-SFO
1h 26mnonstop
$29Frontier
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Tue, Feb 25
6:15 am - 7:46 amONT-SFO
1h 31mnonstop
$79United Airlines
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Tue, Jan 21
6:00 am - 7:41 amONT-SFO
1h 41mnonstop
$94United Airlines
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Tue, Dec 31
12:50 pm - 6:57 pmONT-SFO
6h 07m1 stop
$99American Airlines
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Tue, Feb 18
10:05 am - 4:13 pmONT-SFO
6h 08m1 stop
$108American Airlines
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Thu, Feb 20
11:45 am - 4:54 pmONT-SFO
5h 09m1 stop
$111Alaska Airlines
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Wed, Mar 5
6:00 am - 4:31 pmONT-SFO
10h 31m2 stops
$116Alaska Airlines
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Wed, Feb 12
3:50 pm - 10:15 pmONT-SFO
6h 25m1 stop
$119Southwest
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Tue, Jan 7
6:15 am - 4:10 pmONT-SFO
9h 55m2 stops
$124Southwest
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Thu, Jan 30
4:07 pm - 5:33 pmONT-SFO
1h 26mnonstop
9:59 pm - 11:23 pmSFO-ONT
1h 24mnonstop
$73Frontier
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Mon, Nov 25 - Mon, Dec 16
6:52 pm - 8:19 pmONT-SFO
1h 27mnonstop
1:43 pm - 3:05 pmSFO-ONT
1h 22mnonstop
$74Frontier
Find Deal
Mon, Nov 25 - Tue, Nov 26
6:52 pm - 8:19 pmONT-SFO
1h 27mnonstop
4:36 pm - 6:02 pmSFO-ONT
1h 26mnonstop
$77Frontier
Find Deal
Mon, Nov 25 - Mon, Dec 2
4:07 pm - 5:33 pmONT-SFO
1h 26mnonstop
1:43 pm - 3:05 pmSFO-ONT
1h 22mnonstop
$84Frontier
Find Deal
Sun, Nov 24 - Tue, Nov 26
12:53 pm - 7:05 pmONT-SFO
6h 12m1 stop
3:55 pm - 10:02 pmSFO-ONT
6h 07m1 stop
$333American Airlines
Find Deal
Fri, Nov 22 - Tue, Nov 26
10:10 am - 4:02 pmONT-SFO
5h 52m1 stop
3:55 pm - 10:02 pmSFO-ONT
6h 07m1 stop
$378American Airlines
Find Deal
Fri, Nov 22 - Sun, Nov 24
10:10 am - 4:02 pmONT-SFO
5h 52m1 stop
4:10 pm - 10:02 pmSFO-ONT
5h 52m1 stop
$380American Airlines
Find Deal
Fri, Nov 22 - Sat, Nov 23
4:55 pm - 11:25 pmONT-SFO
6h 30m1 stop
5:20 am - 11:05 amSFO-ONT
5h 45m1 stop
$481Southwest
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Sun, Nov 24 - Mon, Dec 2
4:55 pm - 12:05 amONT-SFO
7h 10m2 stops
5:20 am - 11:05 amSFO-ONT
5h 45m1 stop
$486Southwest
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Sun, Nov 24 - Mon, Dec 2
5:10 am - 1:40 pmONT-SFO
8h 30m2 stops
7:05 am - 3:20 pmSFO-ONT
8h 15m2 stops
$500Southwest
Find Deal
Sun, Nov 24 - Thu, Dec 5
6:00 am - 7:35 amONT-SFO
1h 35mnonstop
9:59 pm - 11:23 pmSFO-ONT
1h 24mnonstop
$56Frontier
Find Deal
Fri, Jan 10 - Mon, Jan 13
6:00 am - 7:35 amONT-SFO
1h 35mnonstop
9:59 pm - 11:23 pmSFO-ONT
1h 24mnonstop
$57Frontier
Find Deal
Fri, Jan 10 - Fri, Jan 10
6:00 am - 7:35 amONT-SFO
1h 35mnonstop
9:59 pm - 11:24 pmSFO-ONT
1h 25mnonstop
$58Frontier
Find Deal
Fri, Jan 24 - Fri, Jan 24
7:05 am - 8:34 amONT-SFO
1h 29mnonstop
4:32 pm - 6:00 pmSFO-ONT
1h 28mnonstop
$59Frontier
Find Deal
Sun, Dec 8 - Mon, Dec 9
6:45 am - 8:20 amONT-SFO
1h 35mnonstop
9:59 pm - 11:24 pmSFO-ONT
1h 25mnonstop
$62Frontier
Find Deal
Sun, Jan 19 - Mon, Jan 20
8:26 am - 10:02 amONT-SFO
1h 36mnonstop
8:06 am - 9:34 amSFO-ONT
1h 28mnonstop
$66Frontier
Find Deal
Fri, Feb 21 - Sun, Feb 23
8:26 am - 10:02 amONT-SFO
1h 36mnonstop
8:06 am - 9:34 amSFO-ONT
1h 28mnonstop
$67Frontier
Find Deal
Thu, Feb 13 - Mon, Feb 17
7:05 am - 8:34 amONT-SFO
1h 29mnonstop
4:32 pm - 6:00 pmSFO-ONT
1h 28mnonstop
$68Frontier
Find Deal
Sun, Dec 8 - Mon, Dec 9
6:00 am - 7:26 amONT-SFO
1h 26mnonstop
4:50 pm - 6:19 pmSFO-ONT
1h 29mnonstop
$139United Airlines
Find Deal
Sat, Dec 14 - Sat, Jan 18
10:35 am - 12:08 pmONT-SFO
1h 33mnonstop
8:25 am - 9:51 amSFO-ONT
1h 26mnonstop
$159United Airlines
Find Deal
Sun, Dec 15 - Sat, Jan 18

Frontier flights from Ontario to San Francisco

Our best Frontier deals on Ontario to San Francisco flight tickets
Frontier
Jan 10
ONT6:00 amOntario
1h 35m
SFO7:35 amSan Francisco
Jan 13
SFO9:59 pmSan Francisco
1h 24m
ONT11:23 pmOntario
Frontier
Jan 10
ONT6:00 amOntario
1h 35m
SFO7:35 amSan Francisco
Jan 10
SFO9:59 pmSan Francisco
1h 24m
ONT11:23 pmOntario
Frontier
Jan 24
ONT6:00 amOntario
1h 35m
SFO7:35 amSan Francisco
Jan 24
SFO9:59 pmSan Francisco
1h 25m
ONT11:24 pmOntario

United Airlines flights from Ontario to San Francisco

Our best United Airlines deals on Ontario to San Francisco flight tickets
United Airlines
Dec 15
ONT10:35 amOntario
1h 33m
SFO12:08 pmSan Francisco
Jan 18
SFO8:25 amSan Francisco
1h 26m
ONT9:51 amOntario
United Airlines
Dec 18
ONT6:28 pmOntario
1h 33m
SFO8:01 pmSan Francisco
Dec 18
SFO10:35 pmSan Francisco
1h 23m
ONT11:58 pmOntario
United Airlines
Jan 7
ONT10:47 amOntario
1h 33m
SFO12:20 pmSan Francisco
Jan 14
SFO4:35 pmSan Francisco
1h 29m
ONT6:04 pmOntario

See travel insights to San Francisco from

How to get the cheapest flight ticket from Ontario to San Francisco

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly from Ontario to San Francisco?

July. The cheapest time of year to fly to San Francisco from Ontario is July. Most expensive is February

What is the cheapest day to depart Ontario for San Francisco?

Tuesday. The cheapest day of the week is typically Tuesday. The most expensive is typically Sunday

When is the cheapest time to fly from Ontario to San Francisco?

In the evening. Ontario to San Francisco flights are approximately 45% more expensive at noon than in the evening

What is the cheapest Ontario to San Francisco flight route?

Ontario - San Francisco. Fly from Ontario to San Francisco for the best Ontario - San Francisco flight prices

How far in advance should you book Ontario to San Francisco flights?

47 days before. The cheapest time to buy a flight from Ontario to San Francisco is approximately 47 days to departure

What cabin class options are available on Ontario to San Francisco flights?

There are 2 cabin classes available to choose from on Ontario to San Francisco flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Ontario to San Francisco flights?

No. A direct flight is the cheapest option for a flight between Ontario to San Francisco.

How have Ontario to San Francisco flight prices changed over time?

As of November 2024, prices for Ontario to San Francisco flights are approximately 0% more expensive when compared to flights at the same time last year.

When to book flights from Ontario to San Francisco

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to San Francisco according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Ontario to San Francisco (ONT to SFO) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to San Francisco

Best Price Found

$28

Fastest flight time

1h 26m

Direct flights

Every day

Airports in San Francisco

1 airport
The best one-way flight to San Francisco from Ontario in the past 72 hours is $28. The best round-trip flight deal from Ontario to San Francisco found on momondo in the last 72 hours is $56.
The fastest flight from Ontario to San Francisco takes 1h 26m
Direct flights go from Ontario to San Francisco every day.
There is 1 airport near San Francisco: San Francisco (SFO)

  • How far is Ontario to San Francisco by plane?

    The straight-line distance from Ontario to San Francisco is 370.2 mi. In terms of flight time, this usually takes a little over 1h 26m.

  • When did momondo last update prices for flights from Ontario Airport to San Francisco Airport?

    Prices for flights from Ontario Airport to San Francisco Airport are updated daily.

  • How many operators does momondo search for flights from Ontario Airport to San Francisco Airport?

  • How old do you have to be to fly from Ontario Airport to San Francisco Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Ontario Airport to San Francisco Airport.

  • What documentation or ID do you need to fly to San Francisco Airport?

    The necessary travel and health documents for your San Francisco Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Ontario to San Francisco?

  • What is the most popular airline from Ontario to San Francisco?


Best airlines flying from Ontario to San Francisco

Compare and see reviews for airlines that fly from Ontario to San Francisco with momondo
Airline
Rating
Free Cancellation
Price
Spirit AirlinesPriceFrom $36Free CancellationRating
6.3
8,174 reviews
Search Spirit Airlines flights
FrontierPriceFrom $38Free CancellationRating
6.1
3,539 reviews
Search Frontier flights
Alaska AirlinesPriceFrom $45Free CancellationRating
8.0
9,461 reviews
Search Alaska Airlines flights
Breeze AirwaysPriceFrom $78Free CancellationRating
8.2
123 reviews
Search Breeze Airways flights
DeltaPriceFrom $85Free CancellationRating
8.0
8,756 reviews
Search Delta flights
United AirlinesPriceFrom $134Free CancellationRating
7.4
9,171 reviews
Search United Airlines flights
  • United Airlines Flights From Ontario to San Francisco

    United Airlines flight deals from Ontario to San Francisco start from $134 round-trip. Over the 34 United Airlines flights for this route in a normal week, average airfare is usually $263 round-trip - but some users have found much cheaper deals with momondo.


Why use momondo?

Why should I use momondo to find a flight deal from Ontario to San Francisco?

It is quick and easy to find Ontario to San Francisco flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to San Francisco that suits you.

Can I find flights from Ontario to San Francisco with flexible booking policies on momondo?

Flights from Ontario to San Francisco with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Ontario to San Francisco?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Ontario to San Francisco.

I’m not ready to book a flight from Ontario to San Francisco right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to San Francisco from Ontario. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.


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