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Cheap flights from Ontario to San Francisco from $25

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 2/10. 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.
3:30 pm - 5:12 pmONT-SFO
1h 42mnonstop
7:10 pm - 8:40 pmSFO-ONT
1h 30mnonstop
$57United Airlines
Find Deal
Thu, Feb 13 - Sun, Feb 16
6:45 am - 8:20 amONT-SFO
1h 35mnonstop
9:59 pm - 11:23 pmSFO-ONT
1h 24mnonstop
$58Frontier
Find Deal
Mon, Jan 13 - Mon, Jan 13
6:00 am - 7:35 amONT-SFO
1h 35mnonstop
9:59 pm - 11:23 pmSFO-ONT
1h 24mnonstop
$59Frontier
Find Deal
Fri, Jan 10 - Sun, Jan 12
6:15 am - 7:46 amONT-SFO
1h 31mnonstop
4:50 pm - 6:19 pmSFO-ONT
1h 29mnonstop
$117United Airlines
Find Deal
Thu, Jan 16 - Sat, Jan 18
6:10 am - 12:23 pmONT-SFO
6h 13m1 stop
4:18 pm - 9:58 pmSFO-ONT
5h 40m1 stop
$184American Airlines
Find Deal
Sat, Jan 25 - Sun, Jan 26
11:14 am - 7:16 pmONT-SFO
8h 02m1 stop
11:00 am - 5:04 pmSFO-ONT
6h 04m1 stop
$202Alaska Airlines
Find Deal
Tue, Jan 28 - Wed, Jan 29
10:00 am - 4:11 pmONT-SFO
6h 11m1 stop
4:18 pm - 9:58 pmSFO-ONT
5h 40m1 stop
$203American Airlines
Find Deal
Tue, Jan 28 - Thu, Jan 30
6:00 am - 4:32 pmONT-SFO
10h 32m2 stops
8:20 am - 5:04 pmSFO-ONT
8h 44m1 stop
$207Alaska Airlines
Find Deal
Sat, Feb 1 - Sat, Feb 8
10:55 am - 10:35 pmONT-SFO
11h 40m1 stop
6:35 am - 3:05 pmSFO-ONT
8h 30m2 stops
$231Southwest
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Mon, Jan 27 - Thu, Jan 30
9:40 am - 10:10 pmONT-SFO
12h 30m2 stops
7:45 am - 11:05 pmSFO-ONT
15h 20m3 stops
$241Southwest
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Sun, Feb 2 - Thu, Feb 6
6:45 am - 8:20 amONT-SFO
1h 35mnonstop
$25Frontier
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Mon, Feb 10
10:47 am - 12:20 pmONT-SFO
1h 33mnonstop
$29United Airlines
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Sun, Jan 26
6:45 am - 8:20 amONT-SFO
1h 35mnonstop
$30Frontier
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Sun, Jan 12
6:15 am - 7:46 amONT-SFO
1h 31mnonstop
$59United Airlines
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Wed, Jan 15
12:50 pm - 6:57 pmONT-SFO
6h 07m1 stop
$84American Airlines
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Wed, Feb 19
11:14 am - 7:16 pmONT-SFO
8h 02m1 stop
$101Alaska Airlines
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Wed, Jan 8
6:00 am - 4:07 pmONT-SFO
10h 07m2 stops
$106Alaska Airlines
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Tue, Feb 4
4:55 pm - 11:45 pmONT-SFO
6h 50m1 stop
$119Southwest
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Sun, Feb 16
6:15 am - 10:25 amONT-SFO
4h 10m1 stop
$138Southwest
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Sun, Jan 19
6:50 am - 12:11 pmONT-SFO
5h 21m1 stop
$168American Airlines
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Thu, Apr 10
7:47 pm - 9:18 pmONT-SFO
1h 31mnonstop
2:29 pm - 3:51 pmSFO-ONT
1h 22mnonstop
$85Frontier
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Sun, Dec 22 - Mon, Jan 6
12:00 pm - 1:29 pmONT-SFO
1h 29mnonstop
2:29 pm - 3:51 pmSFO-ONT
1h 22mnonstop
$87Frontier
Find Deal
Mon, Dec 23 - Mon, Dec 30
12:00 pm - 1:29 pmONT-SFO
1h 29mnonstop
2:29 pm - 3:51 pmSFO-ONT
1h 22mnonstop
$88Frontier
Find Deal
Mon, Dec 23 - Mon, Dec 30
7:47 pm - 9:18 pmONT-SFO
1h 31mnonstop
5:32 pm - 6:57 pmSFO-ONT
1h 25mnonstop
$89Frontier
Find Deal
Sun, Dec 22 - Fri, Jan 3
12:00 pm - 1:29 pmONT-SFO
1h 29mnonstop
2:29 pm - 3:51 pmSFO-ONT
1h 22mnonstop
$95Frontier
Find Deal
Mon, Dec 23 - Mon, Jan 6
7:47 pm - 9:18 pmONT-SFO
1h 31mnonstop
12:04 pm - 6:10 pmSFO-ONT
6h 06m1 stop
$98Frontier
Find Deal
Sun, Dec 22 - Sat, Jan 4
12:00 pm - 1:29 pmONT-SFO
1h 29mnonstop
5:32 pm - 6:57 pmSFO-ONT
1h 25mnonstop
$102Frontier
Find Deal
Mon, Dec 23 - Sun, Dec 29
12:00 pm - 1:29 pmONT-SFO
1h 29mnonstop
5:32 pm - 6:57 pmSFO-ONT
1h 25mnonstop
$104Frontier
Find Deal
Mon, Dec 23 - Sun, Dec 29
7:47 pm - 9:18 pmONT-SFO
1h 31mnonstop
9:59 pm - 8:06 amSFO-ONT
10h 07m1 stop
$108Frontier
Find Deal
Sun, Dec 22 - Sat, Jan 4
12:55 pm - 11:45 pmONT-SFO
10h 50m2 stops
6:35 am - 3:05 pmSFO-ONT
8h 30m2 stops
$460Southwest
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Sat, Dec 21 - Thu, Jan 9
10:47 am - 12:20 pmONT-SFO
1h 33mnonstop
4:50 pm - 6:19 pmSFO-ONT
1h 29mnonstop
$57United Airlines
Find Deal
Thu, Jan 9 - Sat, Jan 11
6:45 am - 8:20 amONT-SFO
1h 35mnonstop
9:59 pm - 11:23 pmSFO-ONT
1h 24mnonstop
$58Frontier
Find Deal
Mon, Jan 13 - Mon, Jan 13
6:45 am - 8:20 amONT-SFO
1h 35mnonstop
8:06 am - 9:34 amSFO-ONT
1h 28mnonstop
$60Frontier
Find Deal
Sun, Feb 2 - Fri, Feb 21
8:26 am - 10:02 amONT-SFO
1h 36mnonstop
8:06 am - 9:34 amSFO-ONT
1h 28mnonstop
$62Frontier
Find Deal
Fri, Feb 14 - Mon, Feb 17
6:00 am - 7:35 amONT-SFO
1h 35mnonstop
9:59 pm - 11:23 pmSFO-ONT
1h 24mnonstop
$63Frontier
Find Deal
Fri, Jan 10 - Sun, Jan 12
6:45 am - 8:20 amONT-SFO
1h 35mnonstop
9:59 pm - 11:24 pmSFO-ONT
1h 25mnonstop
$65Frontier
Find Deal
Mon, Jan 13 - Mon, Jan 20
6:00 am - 7:35 amONT-SFO
1h 35mnonstop
9:59 pm - 11:23 pmSFO-ONT
1h 24mnonstop
$68Frontier
Find Deal
Fri, Jan 10 - Sun, Jan 12
8:26 am - 10:02 amONT-SFO
1h 36mnonstop
8:06 am - 9:34 amSFO-ONT
1h 28mnonstop
$69Frontier
Find Deal
Fri, Mar 7 - Sun, Mar 9
8:26 am - 10:02 amONT-SFO
1h 36mnonstop
8:06 am - 9:34 amSFO-ONT
1h 28mnonstop
$72Frontier
Find Deal
Fri, Feb 21 - Sun, Feb 23
10:47 am - 12:20 pmONT-SFO
1h 33mnonstop
7:00 pm - 8:29 pmSFO-ONT
1h 29mnonstop
$117United Airlines
Find Deal
Thu, Jan 16 - Thu, Jan 23

Frontier flights from Ontario to San Francisco

Our best Frontier deals on Ontario to San Francisco flight tickets
Frontier
Jan 13
ONT6:45 amOntario
1h 35m
SFO8:20 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 12
SFO9:59 pmSan Francisco
1h 24m
ONT11:23 pmOntario
Frontier
Feb 2
ONT6:45 amOntario
1h 35m
SFO8:20 amSan Francisco
Feb 21
SFO8:06 amSan Francisco
1h 28m
ONT9:34 amOntario

American Airlines flights from Ontario to San Francisco

Our best American Airlines deals on Ontario to San Francisco flight tickets
American Airlines
Jan 25
ONT6:10 amOntario
6h 13m
1 stop
SFO12:23 pmSan Francisco
Jan 26
SFO4:18 pmSan Francisco
5h 40m
1 stop
ONT9:58 pmOntario
American Airlines
Jan 28
ONT10:00 amOntario
6h 11m
1 stop
SFO4:11 pmSan Francisco
Jan 30
SFO4:18 pmSan Francisco
5h 40m
1 stop
ONT9:58 pmOntario
American Airlines
Jan 18
ONT12:48 pmOntario
6h 11m
1 stop
SFO6:59 pmSan Francisco
Jan 19
SFO4:18 pmSan Francisco
5h 40m
1 stop
ONT9:58 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 typical price of a round-trip flight between Ontario and San Francisco?

What is the cheapest month to fly to San Francisco?

If you aren’t able to travel to San Francisco during the month of October, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $117.

What is the cheapest day to depart on your flight to San Francisco?

The cheapest day to depart from Ontario to San Francisco is on a Wednesday when prices can be found for as low as $118. The most expensive day to fly to San Francisco is Sunday, with ticket prices averaging around $159.

What is the cheapest time of day to depart on your flight to San Francisco?

Our data shows that the cheapest Ontario to San Francisco flights are usually those with departure times in the morning. Our users have found flights to San Francisco in the morning for as low as $127. Flights in the evening are often more expensive with an average ticket price of $162.

What is the cheapest Ontario to San Francisco flight route?

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

How far in advance should I book a flight to San Francisco?

The ideal time to book your flight to San Francisco is 47 days in advance when prices tend to average $125. In the past 72 hours, momondo users found flights from Ontario to San Francisco for as low as $60.

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

There are 4 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?

You could potentially save up to 86% on your flight if you consider stops on a Ontario to San Francisco flight.

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

As of December 2024, prices for Ontario to San Francisco flights are approximately 10% 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

$25

Fastest flight time

1h 29m

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 $25. The best round-trip flight deal from Ontario to San Francisco found on momondo in the last 72 hours is $57.
The fastest flight from Ontario to San Francisco takes 1h 29m
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 29m.

  • 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 $31Free CancellationRating
6.3
8,119 reviews
Search Spirit Airlines flights
FrontierPriceFrom $38Free CancellationRating
6.1
3,479 reviews
Search Frontier flights
Breeze AirwaysPriceFrom $78Free CancellationRating
8.1
135 reviews
Search Breeze Airways flights
DeltaPriceFrom $85Free CancellationRating
8.0
8,604 reviews
Search Delta flights
Alaska AirlinesPriceFrom $93Free CancellationRating
8.0
9,554 reviews
Search Alaska Airlines flights
United AirlinesPriceFrom $132Free CancellationRating
7.4
9,055 reviews
Search United Airlines flights
  • United Airlines Flights From Ontario to San Francisco

    United Airlines flight deals from Ontario to San Francisco start from $132 round-trip. Over the 12 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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