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Cheap flights from the United States to San Francisco from $39

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from the United States to San Francisco departing on 11/5. 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 the United States to San Francisco

Recent round-trip flight deals from the United States to San Francisco

Frontier Logo
9:46 pm - 11:15 pmONT-SFO
1h 29mnonstop
Frontier Logo
10:11 pm - 11:38 pmSFO-ONT
1h 27mnonstop
$71Frontier
Find Deal
Thu, Oct 2 - Fri, Oct 3
Frontier Logo
9:46 pm - 11:15 pmONT-SFO
1h 29mnonstop
Frontier Logo
10:11 pm - 11:38 pmSFO-ONT
1h 27mnonstop
$72Frontier
Find Deal
Thu, Oct 2 - Fri, Oct 3
United Airlines Logo
1:53 pm - 3:11 pmONT-SFO
1h 18mnonstop
United Airlines Logo
9:30 pm - 10:52 pmSFO-ONT
1h 22mnonstop
$77United Airlines
Find Deal
Wed, Oct 8 - Sat, Oct 11
Delta Logo
6:00 am - 7:30 amLAX-SFO
1h 30mnonstop
Delta Logo
12:25 pm - 1:58 pmSFO-LAX
1h 33mnonstop
$97Delta
Find Deal
Wed, Dec 3 - Wed, Dec 3
United Airlines Logo
1:53 pm - 3:11 pmONT-SFO
1h 18mnonstop
United Airlines Logo
9:30 pm - 10:51 pmSFO-ONT
1h 21mnonstop
$117United Airlines
Find Deal
Fri, Sep 26 - Tue, Oct 28
Delta Logo
6:55 pm - 8:15 pmLAX-SFO
1h 20mnonstop
Delta Logo
5:50 am - 7:19 amSFO-LAX
1h 29mnonstop
$122Delta
Find Deal
Sat, Oct 18 - Sun, Oct 19
Alaska Airlines Logo
7:00 am - 9:16 amSEA-SFO
2h 16mnonstop
Alaska Airlines Logo
11:22 am - 1:38 pmSFO-SEA
2h 16mnonstop
$131Alaska Airlines
Find Deal
Tue, Oct 14 - Tue, Oct 14
Alaska Airlines Logo
11:20 am - 4:03 pmSEA-SFO
4h 43m1 stop
Alaska Airlines Logo
2:40 pm - 4:58 pmSFO-SEA
2h 18mnonstop
$147Alaska Airlines
Find Deal
Wed, Oct 15 - Wed, Oct 22
American Airlines Logo
1:10 pm - 7:55 pmSEA-SFO
6h 45m1 stop
American Airlines Logo
9:00 am - 2:59 pmSFO-SEA
5h 59m1 stop
$159American Airlines
Find Deal
Wed, Oct 8 - Wed, Oct 15
American Airlines Logo
6:00 am - 11:25 amDCA-SFO
8h 25m1 stop
American Airlines Logo
12:27 am - 11:00 amSFO-DCA
7h 33m1 stop
$317American Airlines
Find Deal
Fri, Nov 7 - Sat, Nov 8

Southwest flights from United States to San Francisco

Our best Southwest deals on United States to San Francisco flight tickets
Southwest
Oct 15
LAX7:05 pmLos Angeles
1h 20m
SFO8:25 pmSan Francisco
Oct 22
SFO5:30 amSan Francisco
8h 30m
2 stops
LAX2:00 pmLos Angeles
$112
Find similar
Southwest
Oct 9
LAX4:40 pmLos Angeles
1h 20m
SFO6:00 pmSan Francisco
Oct 11
SFO11:40 amSan Francisco
1h 30m
LAX1:10 pmLos Angeles
$117
Find similar
Southwest
Oct 8
ONT3:50 pmOntario
6h 00m
1 stop
SFO9:50 pmSan Francisco
Oct 15
SFO11:30 amSan Francisco
4h 05m
1 stop
ONT3:35 pmOntario
$119
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United Airlines flights from United States to San Francisco

Our best United Airlines deals on United States to San Francisco flight tickets
United Airlines
Oct 8
ONT1:53 pmOntario
1h 18m
SFO3:11 pmSan Francisco
Oct 11
SFO9:30 pmSan Francisco
1h 22m
ONT10:52 pmOntario
$77
Find similar
United Airlines
Sep 26
ONT1:53 pmOntario
1h 18m
SFO3:11 pmSan Francisco
Oct 28
SFO9:30 pmSan Francisco
1h 21m
ONT10:51 pmOntario
$117
Find similar
United Airlines
Nov 27
ONT1:40 pmOntario
1h 24m
SFO3:04 pmSan Francisco
Jan 2
SFO4:20 pmSan Francisco
1h 23m
ONT5:43 pmOntario
$120
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momondo Fare Finder

 
Customize your flight search to find flights from United States to San Francisco that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated September 16, 2025.
Use the filters below to find and compare flights from the United States to San Francisco that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioSan Francisco

ONT - SFO

ONTSFO

Ontario

Thu 10/2

9:46 pm-11:15 pm

Nonstop1h 29m

San Francisco

Fri 10/3

10:11 pm-11:38 pm

Nonstop1h 27m

$71

OntarioSan Francisco

ONT - SFO

ONTSFO

Ontario

Thu 10/2

9:46 pm-11:15 pm

Nonstop1h 29m

San Francisco

Fri 10/3

10:11 pm-11:38 pm

Nonstop1h 27m

$72

OntarioSan Francisco

ONT - SFO

ONTSFO

Ontario

Wed 10/8

1:53 pm-3:11 pm

Nonstop1h 18m

San Francisco

Sat 10/11

9:30 pm-10:52 pm

Nonstop1h 22m

$77

Los AngelesSan Francisco

LAX - SFO

LAXSFO

Los Angeles

Wed 12/3

6:00 am-7:30 am

Nonstop1h 30m

San Francisco

Wed 12/3

12:25 pm-1:58 pm

Nonstop1h 33m

$97

OntarioSan Francisco

ONT - SFO

ONTSFO

Ontario

Fri 9/26

1:53 pm-3:11 pm

Nonstop1h 18m

San Francisco

Tue 10/28

9:30 pm-10:51 pm

Nonstop1h 21m

$117

Los AngelesSan Francisco

LAX - SFO

LAXSFO

Los Angeles

Sat 10/18

6:55 pm-8:15 pm

Nonstop1h 20m

San Francisco

Sun 10/19

5:50 am-7:19 am

Nonstop1h 29m

$122

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Tue 10/14

7:00 am-9:16 am

Nonstop2h 16m

San Francisco

Tue 10/14

11:22 am-1:38 pm

Nonstop2h 16m

$131

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Wed 10/15

11:20 am-4:03 pm

1 stop4h 43m

San Francisco

Wed 10/22

2:40 pm-4:58 pm

Nonstop2h 18m

$147

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

Wed 10/8

1:10 pm-7:55 pm

1 stop6h 45m

San Francisco

Wed 10/15

9:00 am-2:59 pm

1 stop5h 59m

$159

Washington, D.C.San Francisco

DCA - SFO

DCASFO

Washington, D.C. Reagan-National

Fri 11/7

6:00 am-11:25 am

1 stop8h 25m

San Francisco

Sat 11/8

12:27 am-11:00 am

1 stop7h 33m

$317

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to San Francisco from

How to get the cheapest flight ticket from United States 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 to San Francisco?

If you aren’t able to travel to San Francisco during the month of February, then flying in March is also cheap. Prices for this month can be found on momondo for an average of $357.

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

The cheapest day to depart from United States to San Francisco is on a Thursday when prices can be found for as low as $422. The most expensive day to fly to San Francisco is Sunday, with ticket prices averaging around $592.

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

Our data shows that the cheapest United States to San Francisco flights are usually those with departure times in the evening. Our users have found flights to San Francisco in the evening for as low as $404. Flights in the afternoon are often more expensive with an average ticket price of $509.

What is the cheapest United States to San Francisco flight route?

Fly from Las Vegas Harry Reid Intl to San Francisco for the best United States - San Francisco flight prices

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

You are more likely to see cheaper flights to San Francisco from United States when booking weeks ahead of your departure date. In general, you can expect to find flights to San Francisco for around $395 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Francisco from United States for as low as $343 on momondo.

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

There are 4 cabin classes available to choose from on United States 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 United States to San Francisco flights?

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

Cheap United States to San Francisco flight deals and tips

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

Best Price Found

$69

Fastest flight time

1h 18m

Direct flights

Every day

Airports in San Francisco

1 airport
The best one-way flight to San Francisco from United States in the past 72 hours is $69. The best round-trip flight deal from United States to San Francisco found on momondo in the last 72 hours is $78.
The fastest flight from United States to San Francisco takes 1h 18m
Direct flights go from United States to San Francisco every day.
There is 1 airport near San Francisco: San Francisco (SFO)
Search flight deals

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

    Prices for flights from United States to San Francisco Airport are refreshed on a daily basis.

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

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from United States to San Francisco Airport.

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

    The travel and health documents you'll need for your trip to San Francisco Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at San Francisco Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

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

Best airlines flying from United States to San Francisco

Compare and see reviews for airlines that fly from United States to San Francisco with momondo
Airline
Rating
Free Cancellation
Price
Spirit AirlinesPriceFrom $27Free CancellationRating
6.3
8,019 reviews
Search Spirit Airlines flights
FrontierPriceFrom $37Free CancellationRating
5.8
3,174 reviews
Search Frontier flights
Hawaiian AirlinesPriceFrom $48Free CancellationRating
7.8
2,724 reviews
Search Hawaiian Airlines flights
DeltaPriceFrom $90Free CancellationRating
7.9
7,957 reviews
Search Delta flights
Alaska AirlinesPriceFrom $97Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights
SouthwestPriceFrom $97Free CancellationRating
8.0
4,242 reviews
Search Southwest flights
United AirlinesPriceFrom $97Free CancellationRating
7.4
8,924 reviews
Search United Airlines flights
American AirlinesPriceFrom $107Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
JetBluePriceFrom $118Free CancellationRating
7.2
2,914 reviews
Search JetBlue flights
Sun Country AirPriceFrom $150Free CancellationRating
6.9
330 reviews
Search Sun Country Air flights

Traveling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Santa Cruz
Carmel-by-the-Sea
Modesto
Sonoma
Calistoga
Bodega Bay
Roseville
Hayward
Big Sur
Santa Clara
Daly City
Fremont
Berkeley
Half Moon Bay
Walnut Creek
Vallejo
Redwood City
Salinas
South San Francisco
Fairfield

Why use momondo?

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

It is quick and easy to find United States 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 United States to San Francisco with flexible booking policies on momondo?

Yes. All flights to San Francisco from United States on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

momondo helps you find the best flight between United States and San Francisco by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Of course. momondo tracks the price of United States to San Francisco flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your San Francisco trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
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