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

5 flights are operational daily from Ontario to San Francisco as of October 2026. The most popular departure time for this route is 18:00, with 44% of flights per day taking off in the afternoon.

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

As of October 2026, 39 flights take off from Ontario and land in San Francisco each week. The most common flight departure day for this route is Tue, with 23% of weekly flights taking off on this day.

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

United Airlines and Southwest are the most popular carriers operating from Ontario to San Francisco

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

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and stopovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Ontario Airport to San Francisco Airport.

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

The required travel and health documents for your San Francisco Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's licence and a passport valid for six months after your intended arrival at San Francisco Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

R976 Cheap Flights from Ontario to San Francisco in 2026/27

Find the cheapest flights from Ontario to San Francisco

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One-way

Last minute

Direct

Cheap return flights

Enter your travel dates to find the best prices.

13:35 - 15:05ONT Ontario-SFO San Francisco

1h 30mdirect

16:35 - 18:01SFO San Francisco-ONT Ontario

1h 26mdirect

R1 885United Airlines

Wed, Nov 11 - Wed, Nov 11

9:25 - 10:55ONT Ontario-SFO San Francisco

1h 30mdirect

18:50 - 20:15SFO San Francisco-ONT Ontario

1h 25mdirect

R1 935United Airlines

Wed, Nov 11 - Mon, Nov 16

16:17 - 17:50ONT Ontario-SFO San Francisco

1h 33mdirect

21:20 - 22:48SFO San Francisco-ONT Ontario

1h 28mdirect

R2 282United Airlines

Wed, Nov 11 - Sun, Nov 15

18:35 - 20:08ONT Ontario-SFO San Francisco

1h 33mdirect

19:01 - 20:30SFO San Francisco-ONT Ontario

1h 29mdirect

R2 381United Airlines

Fri, Feb 12 - Mon, Feb 15

6:00 - 7:30ONT Ontario-SFO San Francisco

1h 30mdirect

14:00 - 15:24SFO San Francisco-ONT Ontario

1h 24mdirect

R2 497United Airlines

Thu, Nov 26 - Thu, Nov 26

5:00 - 15:30ONT Ontario-SFO San Francisco

10h 30m1 stop Phoenix Sky Harbor Intl

17:30 - 22:00SFO San Francisco-ONT Ontario

4h 30m1 stop Las Vegas Harry Reid Intl

R2 579Southwest

Thu, Nov 5 - Thu, Nov 5

13:35 - 15:05ONT Ontario-SFO San Francisco

1h 30mdirect

21:20 - 22:48SFO San Francisco-ONT Ontario

1h 28mdirect

R2 612United Airlines

Fri, Nov 6 - Sun, Nov 8

8:40 - 16:15ONT Ontario-SFO San Francisco

7h 35m2 stops Phoenix Sky Harbor Intl San Diego

7:00 - 16:10SFO San Francisco-ONT Ontario

9h 10m2 stops Las Vegas Harry Reid Intl Phoenix Sky Harbor Intl

R2 662Southwest

Thu, Dec 3 - Wed, Dec 9

9:30 - 18:40ONT Ontario-SFO San Francisco

9h 10m2 stops Phoenix Sky Harbor Intl Los Angeles

5:15 - 10:50SFO San Francisco-ONT Ontario

5h 35m1 stop Phoenix Sky Harbor Intl

R2 679Southwest

Sat, Nov 7 - Thu, Nov 12

5:55 - 12:20ONT Ontario-SFO San Francisco

6h 25m1 stop Phoenix Sky Harbor Intl

5:15 - 10:50SFO San Francisco-ONT Ontario

5h 35m1 stop Phoenix Sky Harbor Intl

R2 728Southwest

Wed, Nov 11 - Sun, Nov 15

Cheap last-minute flights

Enter your travel dates to find the best prices.

13:52 - 15:21ONT Ontario-SFO San Francisco

1h 29mdirect

18:50 - 20:15SFO San Francisco-ONT Ontario

1h 25mdirect

R4 613United Airlines

Wed, Oct 21 - Tue, Oct 27

16:15 - 21:40ONT Ontario-SFO San Francisco

5h 25m1 stop Las Vegas Harry Reid Intl

5:20 - 9:45SFO San Francisco-ONT Ontario

4h 25m1 stop Phoenix Sky Harbor Intl

R4 944Southwest

Wed, Oct 21 - Tue, Oct 27

6:10 - 15:10ONT Ontario-SFO San Francisco

9h 00m2 stops Phoenix Sky Harbor Intl San Diego

5:20 - 9:45SFO San Francisco-ONT Ontario

4h 25m1 stop Phoenix Sky Harbor Intl

R5 027Southwest

Wed, Oct 21 - Tue, Oct 27

6:10 - 15:10ONT Ontario-SFO San Francisco

9h 00m2 stops Phoenix Sky Harbor Intl San Diego

5:20 - 15:40SFO San Francisco-ONT Ontario

10h 20m2 stops Phoenix Sky Harbor Intl Las Vegas Harry Reid Intl

R5 109Southwest

Wed, Oct 21 - Tue, Oct 27

11:10 - 12:43ONT Ontario-SFO San Francisco

1h 33mdirect

16:15 - 17:46SFO San Francisco-ONT Ontario

1h 31mdirect

R5 275United Airlines

Wed, Oct 21 - Sat, Oct 24

17:00 - 22:50ONT Ontario-SFO San Francisco

5h 50m1 stop Phoenix Sky Harbor Intl

15:55 - 23:50SFO San Francisco-ONT Ontario

7h 55m1 stop Phoenix Sky Harbor Intl

R5 357Southwest

Wed, Oct 21 - Mon, Oct 26

11:10 - 12:43ONT Ontario-SFO San Francisco

1h 33mdirect

18:50 - 20:15SFO San Francisco-ONT Ontario

1h 25mdirect

R5 440United Airlines

Wed, Oct 21 - Sat, Oct 31

6:10 - 10:30ONT Ontario-SFO San Francisco

4h 20m1 stop Phoenix Sky Harbor Intl

20:40 - 7:50SFO San Francisco-ONT Ontario

11h 10m2 stops Los Angeles Las Vegas Harry Reid Intl

R5 456Southwest

Wed, Oct 21 - Mon, Oct 26

6:10 - 15:10ONT Ontario-SFO San Francisco

9h 00m2 stops Phoenix Sky Harbor Intl San Diego

20:40 - 7:50SFO San Francisco-ONT Ontario

11h 10m2 stops Los Angeles Las Vegas Harry Reid Intl

R5 539Southwest

Wed, Oct 21 - Mon, Oct 26

13:52 - 15:21ONT Ontario-SFO San Francisco

1h 29mdirect

18:50 - 20:15SFO San Francisco-ONT Ontario

1h 25mdirect

R5 605United Airlines

Wed, Oct 21 - Sun, Oct 25

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United Airlines flights from Ontario to San Francisco

Our best United Airlines deals on Ontario to San Francisco flight tickets

United Airlines

Nov 11

ONT13:35Ontario

1h 30m

SFO15:05San Francisco

Nov 11

SFO16:35San Francisco

1h 26m

ONT18:01Ontario

R1 885

United Airlines

Nov 11

ONT9:25Ontario

1h 30m

SFO10:55San Francisco

Nov 16

SFO18:50San Francisco

1h 25m

ONT20:15Ontario

R1 935

United Airlines

Nov 11

ONT16:17Ontario

1h 33m

SFO17:50San Francisco

Nov 15

SFO21:20San Francisco

1h 28m

ONT22:48Ontario

R2 282

Southwest flights from Ontario to San Francisco

Our best Southwest deals on Ontario to San Francisco flight tickets

Southwest

Nov 5

ONT17:20Ontario

6h 25m

1 stop

SFO23:45San Francisco

Nov 7

SFO5:00San Francisco

6h 20m

2 stops

ONT11:20Ontario

R2 579

Southwest

Dec 3

ONT8:40Ontario

7h 35m

2 stops

SFO16:15San Francisco

Dec 9

SFO7:00San Francisco

9h 10m

2 stops

ONT16:10Ontario

R2 662

Southwest

Nov 7

ONT9:30Ontario

9h 10m

2 stops

SFO18:40San Francisco

Nov 12

SFO5:15San Francisco

5h 35m

1 stop

ONT10:50Ontario

R2 679

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

OntarioSan Francisco

ONT Ontario - SFO San Francisco

ONTSFO

Ontario

Wed 11/11

13:35-15:05

Nonstop1h 30m

San Francisco

Wed 11/11

16:35-18:01

Nonstop1h 26m

R1 885

OntarioSan Francisco

ONT Ontario - SFO San Francisco

ONTSFO

Ontario

Wed 11/11

9:25-10:55

Nonstop1h 30m

San Francisco

Mon 16/11

18:50-20:15

Nonstop1h 25m

R1 935

OntarioSan Francisco

ONT Ontario - SFO San Francisco

ONTSFO

Ontario

Wed 11/11

16:17-17:50

Nonstop1h 33m

San Francisco

Sun 15/11

21:20-22:48

Nonstop1h 28m

R2 282

OntarioSan Francisco

ONT Ontario - SFO San Francisco

ONTSFO

Ontario

Fri 12/2

18:35-20:08

Nonstop1h 33m

San Francisco

Mon 15/2

19:01-20:30

Nonstop1h 29m

R2 381

Fastest return journey

OntarioSan Francisco

ONT Ontario - SFO San Francisco

ONTSFO

Ontario

Thu 26/11

6:00-7:30

Nonstop1h 30m

San Francisco

Thu 26/11

14:00-15:24

Nonstop1h 24m

R2 497

OntarioSan Francisco

ONT Ontario - SFO San Francisco

ONTSFO

Ontario

Thu 5/11

5:00-15:30

1 stop10h 30m

San Francisco

Thu 5/11

17:30-22:00

1 stop4h 30m

R2 579

OntarioSan Francisco

ONT Ontario - SFO San Francisco

ONTSFO

Ontario

Fri 6/11

13:35-15:05

Nonstop1h 30m

San Francisco

Sun 8/11

21:20-22:48

Nonstop1h 28m

R2 612

OntarioSan Francisco

ONT Ontario - SFO San Francisco

ONTSFO

Ontario

Thu 3/12

8:40-16:15

2 stops7h 35m

San Francisco

Wed 9/12

7:00-16:10

2 stops9h 10m

R2 662

OntarioSan Francisco

ONT Ontario - SFO San Francisco

ONTSFO

Ontario

Sat 7/11

9:30-18:40

2 stops9h 10m

San Francisco

Thu 12/11

5:15-10:50

1 stop5h 35m

R2 679

OntarioSan Francisco

ONT Ontario - SFO San Francisco

ONTSFO

Ontario

Wed 11/11

5:55-12:20

1 stop6h 25m

San Francisco

Sun 15/11

5:15-10:50

1 stop5h 35m

R2 728

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

Other information

What is the typical price of a round-trip flight between Ontario and San Francisco?

Prices are currently low for flights on this route.

Typical prices usually range from R1 935 to R4 001.
The lowest price recently found on this route was R1 885.

What is the cheapest month to fly to San Francisco?

If you’re not able to fly to San Francisco in October, then August is your next best option. Flight prices from Ontario to San Francisco during August average around R2 662.

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 Friday when prices can be found for as low as R3 497. The most expensive day to fly to San Francisco is Wednesday, with ticket prices averaging around R3 648.

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 from Ontario to San Francisco?

You are more likely to see cheaper flights to San Francisco from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to San Francisco for around R3 719 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Francisco from Ontario for as low as R2 546 on momondo.

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

There is only 1 cabin class 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.

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

As of October 2026, prices for Ontario to San Francisco flights are approximately 14% 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 return 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	R976
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 R976. The best return flight deal from Ontario to San Francisco found on momondo in the last 72 hours is R1 885.

Direct flights go from Ontario to San Francisco every day.

There is 1 airport in San Francisco. From Ontario there are direct flights to San Francisco (SFO).

Search flight deals

Frequently asked questions about flying from Ontario to San Francisco

How far is Ontario to San Francisco by plane?
There are 594,2 km between Ontario and San Francisco.
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 old do you have to be to fly from Ontario Airport to San Francisco Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and stopovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Ontario Airport to San Francisco Airport.
What documentation or ID do you need to fly to San Francisco Airport?
The required travel and health documents for your San Francisco Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's licence and a passport valid for six months after your intended arrival at San Francisco Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from Ontario to San Francisco?
Based on momondo bookings for flights between Ontario and San Francisco, the leading plane model is Boeing 737 MAX 9, making up 14,48% of the total bookings. Other popular models include Airbus A320neo with 14,05%, Boeing 737-800 Passenger/BBJ2 (winglets) with 10,75%, and Airbus A321neo with 10,43%.

Emeryville

Guerneville

Menlo Park

Berkeley

Redwood City

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Ontario to San Francisco . Millions of users trust and use momondo every year so you are in good hands.

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

All flight searches from Ontario to San Francisco on momondo can be filtered to show those which offer flexible booking policies.

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 can track prices for Ontario to San Francisco flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.