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Cheap flights from Ontario to San Francisco from $23

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 11/16. 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.
3:41 pm - 5:08 pmONT-SFO
1h 27mnonstop
1:44 pm - 3:06 pmSFO-ONT
1h 22mnonstop
$50Frontier
Find Deal
Sat, Nov 16 - Mon, Nov 18
3:41 pm - 5:08 pmONT-SFO
1h 27mnonstop
1:44 pm - 3:06 pmSFO-ONT
1h 22mnonstop
$51Frontier
Find Deal
Sat, Nov 16 - Mon, Nov 18
3:41 pm - 5:08 pmONT-SFO
1h 27mnonstop
1:44 pm - 3:06 pmSFO-ONT
1h 22mnonstop
$52Frontier
Find Deal
Sat, Nov 16 - Mon, Nov 18
3:41 pm - 5:08 pmONT-SFO
1h 27mnonstop
8:05 am - 9:30 amSFO-ONT
1h 25mnonstop
$53Frontier
Find Deal
Sat, Nov 16 - Sun, Nov 17
7:30 am - 8:59 amONT-SFO
1h 29mnonstop
9:59 pm - 11:23 pmSFO-ONT
1h 24mnonstop
$55Frontier
Find Deal
Fri, Dec 6 - Sun, Dec 8
7:30 am - 8:59 amONT-SFO
1h 29mnonstop
4:32 pm - 6:00 pmSFO-ONT
1h 28mnonstop
$56Frontier
Find Deal
Fri, Dec 6 - Mon, Dec 9
3:20 pm - 4:53 pmONT-SFO
1h 33mnonstop
10:35 pm - 11:58 pmSFO-ONT
1h 23mnonstop
$139United Airlines
Find Deal
Tue, Dec 10 - Fri, Dec 13
6:00 am - 7:26 amONT-SFO
1h 26mnonstop
8:25 am - 9:58 amSFO-ONT
1h 33mnonstop
$179United Airlines
Find Deal
Sat, Dec 14 - Fri, Jan 3
6:00 am - 4:07 pmONT-SFO
10h 07m2 stops
10:59 pm - 7:11 amSFO-ONT
8h 12m1 stop
Tue, Jan 14 - Thu, Jan 16
6:00 am - 7:26 amONT-SFO
1h 26mnonstop
10:35 pm - 11:58 pmSFO-ONT
1h 23mnonstop
$199United Airlines
Find Deal
Wed, Dec 11 - Fri, Dec 13
3:41 pm - 5:08 pmONT-SFO
1h 27mnonstop
$23Frontier
Find Deal
Sat, Nov 16
7:36 am - 9:02 amONT-SFO
1h 26mnonstop
$25Frontier
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Wed, Feb 26
5:45 am - 7:15 amONT-SFO
1h 30mnonstop
$28Frontier
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Sun, Nov 17
6:28 pm - 8:01 pmONT-SFO
1h 33mnonstop
$79United Airlines
Find Deal
Sat, Dec 14
6:28 pm - 8:01 pmONT-SFO
1h 33mnonstop
$109United Airlines
Find Deal
Wed, Dec 4
11:45 am - 7:37 pmONT-SFO
7h 52m1 stop
$111Alaska Airlines
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Sat, Mar 1
6:00 am - 7:37 pmONT-SFO
13h 37m2 stops
$122Alaska Airlines
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Sat, Mar 1
12:25 pm - 9:35 pmONT-SFO
9h 10m2 stops
$134Southwest
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Mon, Jan 27
10:10 am - 4:02 pmONT-SFO
5h 52m1 stop
$139American Airlines
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Wed, Nov 27
5:35 am - 4:45 pmONT-SFO
11h 10m2 stops
$140Southwest
Find Deal
Sat, Feb 15
5:45 am - 7:15 amONT-SFO
1h 30mnonstop
1:29 pm - 2:51 pmSFO-ONT
1h 22mnonstop
$67Frontier
Find Deal
Thu, Nov 7 - Sat, Nov 16
5:45 am - 7:15 amONT-SFO
1h 30mnonstop
1:29 pm - 2:51 pmSFO-ONT
1h 22mnonstop
$69Frontier
Find Deal
Thu, Nov 7 - Sat, Nov 9
9:05 am - 3:20 pmONT-SFO
6h 15m1 stop
7:05 am - 3:20 pmSFO-ONT
8h 15m2 stops
$451Southwest
Find Deal
Wed, Nov 6 - Wed, Nov 13
10:30 am - 7:05 pmONT-SFO
8h 35m2 stops
7:05 am - 3:20 pmSFO-ONT
8h 15m2 stops
$456Southwest
Find Deal
Sat, Nov 9 - Tue, Nov 12
1:55 pm - 3:26 pmONT-SFO
1h 31mnonstop
1:06 pm - 2:34 pmSFO-ONT
1h 28mnonstop
$457United Airlines
Find Deal
Thu, Nov 7 - Tue, Nov 12
6:28 pm - 8:01 pmONT-SFO
1h 33mnonstop
9:00 pm - 10:23 pmSFO-ONT
1h 23mnonstop
$477United Airlines
Find Deal
Fri, Nov 8 - Mon, Nov 11
6:13 pm - 12:15 amONT-SFO
6h 02m1 stop
9:00 am - 11:59 pmSFO-ONT
14h 59m2 stops
Thu, Nov 7 - Sun, Nov 10
6:46 pm - 12:38 amONT-SFO
5h 52m1 stop
9:00 am - 11:59 pmSFO-ONT
14h 59m2 stops
Fri, Nov 8 - Sun, Nov 10
7:00 am - 11:53 amONT-SFO
4h 53m1 stop
2:28 pm - 8:03 pmSFO-ONT
5h 35m1 stop
$719Alaska Airlines
Find Deal
Thu, Nov 7 - Sun, Nov 10
7:00 am - 3:01 pmONT-SFO
8h 01m1 stop
12:34 pm - 8:03 pmSFO-ONT
7h 29m1 stop
$749Alaska Airlines
Find Deal
Fri, Nov 8 - Sun, Nov 10
3:41 pm - 5:08 pmONT-SFO
1h 27mnonstop
8:05 am - 9:30 amSFO-ONT
1h 25mnonstop
$50Frontier
Find Deal
Sat, Nov 16 - Sun, Nov 17
3:41 pm - 5:08 pmONT-SFO
1h 27mnonstop
1:44 pm - 3:06 pmSFO-ONT
1h 22mnonstop
$51Frontier
Find Deal
Sat, Nov 16 - Mon, Nov 18
3:41 pm - 5:08 pmONT-SFO
1h 27mnonstop
1:44 pm - 3:06 pmSFO-ONT
1h 22mnonstop
$52Frontier
Find Deal
Sat, Nov 16 - Mon, Nov 18
3:41 pm - 5:08 pmONT-SFO
1h 27mnonstop
1:44 pm - 3:06 pmSFO-ONT
1h 22mnonstop
$53Frontier
Find Deal
Sat, Nov 16 - Mon, Nov 18
7:30 am - 8:59 amONT-SFO
1h 29mnonstop
9:59 pm - 11:23 pmSFO-ONT
1h 24mnonstop
$55Frontier
Find Deal
Fri, Dec 6 - Sun, Dec 8
7:30 am - 8:59 amONT-SFO
1h 29mnonstop
4:32 pm - 6:00 pmSFO-ONT
1h 28mnonstop
$56Frontier
Find Deal
Fri, Dec 6 - Mon, Dec 9
3:59 pm - 5:26 pmONT-SFO
1h 27mnonstop
1:44 pm - 3:06 pmSFO-ONT
1h 22mnonstop
$57Frontier
Find Deal
Thu, Nov 14 - Mon, Nov 18
7:05 am - 8:34 amONT-SFO
1h 29mnonstop
9:59 pm - 11:23 pmSFO-ONT
1h 24mnonstop
$58Frontier
Find Deal
Sun, Dec 15 - Mon, Dec 16
6:00 am - 7:26 amONT-SFO
1h 26mnonstop
1:05 pm - 2:33 pmSFO-ONT
1h 28mnonstop
$179United Airlines
Find Deal
Tue, Dec 3 - Tue, Dec 10
6:00 am - 7:26 amONT-SFO
1h 26mnonstop
10:35 pm - 11:58 pmSFO-ONT
1h 23mnonstop
$199United Airlines
Find Deal
Sat, Dec 7 - Sun, Dec 8

United Airlines flights from Ontario to San Francisco

Our best United Airlines deals on Ontario to San Francisco flight tickets
United Airlines
Dec 10
ONT3:20 pmOntario
1h 33m
SFO4:53 pmSan Francisco
Dec 13
SFO10:35 pmSan Francisco
1h 23m
ONT11:58 pmOntario
United Airlines
Dec 14
ONT6:00 amOntario
1h 26m
SFO7:26 amSan Francisco
Jan 3
SFO8:25 amSan Francisco
1h 33m
ONT9:58 amOntario
United Airlines
Dec 11
ONT6:00 amOntario
1h 26m
SFO7:26 amSan Francisco
Dec 13
SFO10:35 pmSan Francisco
1h 23m
ONT11:58 pmOntario

Frontier flights from Ontario to San Francisco

Our best Frontier deals on Ontario to San Francisco flight tickets
Frontier
Nov 16
ONT3:41 pmOntario
1h 27m
SFO5:08 pmSan Francisco
Nov 18
SFO1:44 pmSan Francisco
1h 22m
ONT3:06 pmOntario
Frontier
Nov 16
ONT3:41 pmOntario
1h 27m
SFO5:08 pmSan Francisco
Nov 18
SFO1:44 pmSan Francisco
1h 22m
ONT3:06 pmOntario
Frontier
Nov 16
ONT3:41 pmOntario
1h 27m
SFO5:08 pmSan Francisco
Nov 18
SFO1:44 pmSan Francisco
1h 22m
ONT3:06 pmOntario

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 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 morning. Ontario to San Francisco flights are approximately 43% more expensive at noon than in the morning

What is the cheapest airline that flies to San Francisco from Ontario?

Spirit Airlines. Spirit Airlines, Frontier, and Delta are the most popular carriers operating from Ontario to San Francisco

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

How many flights depart from Ontario to San Francisco on average per day?

The number of flights available between Ontario and San Francisco is 13 per day as of November 2024. The most frequent departure time is 6:00PM, with 33% of daily flights leaving at noon.

How many flights depart from Ontario to San Francisco on average per week?

As of November 2024, there are 91 flights per week flying from Ontario to San Francisco. The most common day of the week flights depart is Sunday, with 15% of flights taking off on this day.

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 10% cheaper 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

$23

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 $23. The best round-trip flight deal from Ontario to San Francisco found on momondo in the last 72 hours is $50.
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
8,187 reviews
Search Spirit Airlines flights
FrontierPriceFrom $38Free CancellationRating
6.1
3,573 reviews
Search Frontier flights
DeltaPriceFrom $64Free CancellationRating
8.0
8,829 reviews
Search Delta flights
Alaska AirlinesPriceFrom $74Free CancellationRating
8.0
9,423 reviews
Search Alaska Airlines flights
Breeze AirwaysPriceFrom $78Free CancellationRating
8.2
118 reviews
Search Breeze Airways flights
United AirlinesPriceFrom $135Free CancellationRating
7.4
9,226 reviews
Search United Airlines flights
  • United Airlines Flights From Ontario to San Francisco

    United Airlines flight deals from Ontario to San Francisco start from $135 round-trip. Over the 35 United Airlines flights for this route in a normal week, average airfare is usually $269 round-trip - but some users have found much cheaper deals with momondo.

  • Frontier Flights From Ontario to San Francisco

    Across 3,573 Frontier reviews on momondo, the average score is 6.1/10. Frontier flies from Ontario to San Francisco about 1 time each week, with ticket deals ranging from $38 to $89. Price data is based on momondo searches in the last 72 hours.


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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