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Cheap flights from St. Louis to San Francisco from $62

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to San Francisco departing on 1/24. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
4:51 pm - 12:28 am
STL
-
SFO
9h 37m1 stop
Frontier Logo
6:15 am - 1:56 pm
SFO
-
STL
5h 41m1 stop
$165Frontier
Wed, Feb 18 - Sat, Feb 21
Frontier Logo
4:51 pm - 12:28 am
STL
-
SFO
9h 37m1 stop
Frontier Logo
10:14 pm - 7:11 pm
SFO
-
STL
18h 57m1 stop
$166Frontier
Wed, Mar 4 - Mon, Mar 9
Frontier Logo
7:43 pm - 12:24 am
STL
-
SFO
6h 41m1 stop
Frontier Logo
7:00 am - 2:48 pm
SFO
-
STL
5h 48m1 stop
$173Frontier
Mon, Jan 12 - Wed, Jan 14
Frontier Logo
7:43 pm - 8:46 pm
STL
-
SFO
27h 03m1 stop
Frontier Logo
9:11 pm - 2:46 pm
SFO
-
STL
39h 35m2 stops
$174Frontier
Mon, Jan 12 - Mon, Jan 19
Frontier Logo
2:51 pm - 8:03 am
STL
-
SFO
19h 12m1 stop
Frontier Logo
6:55 am - 11:59 pm
SFO
-
STL
39h 04m2 stops
$175Frontier
Sat, Feb 21 - Wed, Feb 25
Frontier Logo
2:51 pm - 8:03 am
STL
-
SFO
19h 12m1 stop
Frontier Logo
6:55 am - 3:53 pm
SFO
-
STL
6h 58m1 stop
$182Frontier
Sat, Feb 21 - Wed, Feb 25
Frontier Logo
10:11 pm - 6:20 pm
STL
-
SFO
22h 09m1 stop
Frontier Logo
10:14 pm - 7:27 pm
SFO
-
STL
19h 13m1 stop
$183Frontier
Mon, Mar 2 - Sat, Mar 7
Frontier Logo
9:43 pm - 10:08 am
STL
-
SFO
14h 25m1 stop
Frontier Logo
9:32 pm - 8:50 pm
SFO
-
STL
21h 18m1 stop
$189Frontier
Fri, Jan 30 - Sun, Feb 1
Frontier Logo
7:27 pm - 12:28 am
STL
-
SFO
7h 01m1 stop
Frontier Logo
9:11 pm - 2:46 pm
SFO
-
STL
39h 35m2 stops
$195Frontier
Fri, Jan 16 - Mon, Jan 19
Frontier Logo
7:43 pm - 8:46 pm
STL
-
SFO
27h 03m1 stop
Frontier Logo
6:25 am - 6:51 am
SFO
-
STL
46h 26m2 stops
$198Frontier
Mon, Jan 12 - Mon, Jan 19

Frontier flights from St. Louis to San Francisco

Our best Frontier deals on St. Louis to San Francisco flight tickets
Frontier
Feb 18
STL4:51 pmLambert-St Louis
9h 37m
1 stop
SFO12:28 amSan Francisco
Feb 21
SFO6:15 amSan Francisco
5h 41m
1 stop
STL1:56 pmLambert-St Louis
$165
Find similar
Frontier
Mar 4
STL4:51 pmLambert-St Louis
9h 37m
1 stop
SFO12:28 amSan Francisco
Mar 9
SFO10:14 pmSan Francisco
18h 57m
1 stop
STL7:11 pmLambert-St Louis
$166
Find similar
Frontier
Jan 12
STL7:43 pmLambert-St Louis
6h 41m
1 stop
SFO12:24 amSan Francisco
Jan 14
SFO7:00 amSan Francisco
5h 48m
1 stop
STL2:48 pmLambert-St Louis
$173
Find similar

Delta flights from St. Louis to San Francisco

Our best Delta deals on St. Louis to San Francisco flight tickets
Delta
Jan 9
STL6:35 amLambert-St Louis
13h 14m
2 stops
SFO5:49 pmSan Francisco
Jan 12
SFO10:35 amSan Francisco
9h 00m
2 stops
STL9:35 pmLambert-St Louis
$274
Find similar
Delta
Mar 19
STL7:15 amLambert-St Louis
10h 49m
2 stops
SFO4:04 pmSan Francisco
Mar 23
SFO7:29 pmSan Francisco
11h 21m
2 stops
STL8:50 amLambert-St Louis
$351
Find similar
Delta
Jan 9
STL6:35 amLambert-St Louis
13h 14m
2 stops
SFO5:49 pmSan Francisco
Jan 12
SFO9:30 pmSan Francisco
9h 23m
1 stop
STL8:53 amLambert-St Louis
$357
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis 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 December 15, 2025.
Use the filters below to find and compare flights from St. Louis to San Francisco that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Wed 2/18

4:51 pm-12:28 am

1 stop9h 37m

San Francisco

Sat 2/21

6:15 am-1:56 pm

1 stop5h 41m

$165

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Wed 3/4

4:51 pm-12:28 am

1 stop9h 37m

San Francisco

Mon 3/9

10:14 pm-7:11 pm

1 stop18h 57m

$166

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Mon 1/12

7:43 pm-12:24 am

1 stop6h 41m

San Francisco

Wed 1/14

7:00 am-2:48 pm

1 stop5h 48m

$173

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Mon 1/12

7:43 pm-8:46 pm

1 stop27h 03m

San Francisco

Mon 1/19

9:11 pm-2:46 pm

2 stops39h 35m

$174

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Sat 2/21

2:51 pm-8:03 am

1 stop19h 12m

San Francisco

Wed 2/25

6:55 am-11:59 pm

2 stops39h 04m

$175

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Sat 2/21

2:51 pm-8:03 am

1 stop19h 12m

San Francisco

Wed 2/25

6:55 am-3:53 pm

1 stop6h 58m

$182

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Mon 3/2

10:11 pm-6:20 pm

1 stop22h 09m

San Francisco

Sat 3/7

10:14 pm-7:27 pm

1 stop19h 13m

$183

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Fri 1/30

9:43 pm-10:08 am

1 stop14h 25m

San Francisco

Sun 2/1

9:32 pm-8:50 pm

1 stop21h 18m

$189

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Fri 1/16

7:27 pm-12:28 am

1 stop7h 01m

San Francisco

Mon 1/19

9:11 pm-2:46 pm

2 stops39h 35m

$195

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Mon 1/12

7:43 pm-8:46 pm

1 stop27h 03m

San Francisco

Mon 1/19

6:25 am-6:51 am

2 stops46h 26m

$198

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 St. Louis 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 April is also cheap. Prices for this month can be found on momondo for an average of $359.

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

The cheapest day to depart from St. Louis to San Francisco is on a Thursday when prices can be found for as low as $599. The most expensive day to fly to San Francisco is Monday, with ticket prices averaging around $1,024.

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

Our data shows that the cheapest St. Louis to San Francisco flights are usually those with departure times at noon. Our users have found flights to San Francisco at noon for as low as $469. Flights in the evening are often more expensive with an average ticket price of $1,211.

What is the cheapest Lambert-St Louis to San Francisco flight route?

Fly from Lambert-St Louis to San Francisco for the best Lambert-St Louis - 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 St. Louis 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 St. Louis for as low as $342 on momondo.

What cabin class options are available on Lambert-St Louis to San Francisco flights?

There are 4 cabin classes available to choose from on Lambert-St Louis 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 St. Louis to San Francisco flights?

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

How have St. Louis to San Francisco flight prices changed over time?

As of December 2025, prices for St. Louis to San Francisco flights are approximately 5% cheaper when compared to flights at the same time last year.

When to book flights from St. Louis to San Francisco

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

Cheap St. Louis to San Francisco (STL to SFO) flight deals and tips

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

Best Price Found

$241

Fastest flight time

4h 05m

Direct flights

Every day

Airports in San Francisco

1 airport
The best one-way flight to San Francisco from St. Louis in the past 72 hours is $241. The best round-trip flight deal from St. Louis to San Francisco found on momondo in the last 72 hours is $553.
The fastest flight from St. Louis to San Francisco takes 4h 05m
Direct flights go from St. Louis to San Francisco every day.
There is 1 airport in San Francisco. From St. Louis there are direct flights to San Francisco (SFO).
Search flight deals

  • How far is Lambert-St Louis to San Francisco by plane?

    There are 1739.7 mi between Lambert-St Louis and San Francisco. In terms of flight time, this usually takes a little over 4h 05m.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to San Francisco Airport?

    Prices for flights from Lambert-St Louis Airport to San Francisco Airport are updated daily.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to San Francisco Airport?

  • How old do you have to be to fly from Lambert-St Louis 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 layovers 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 Lambert-St Louis 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 license 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 St. Louis to San Francisco?

  • What is the most popular airline from St. Louis to San Francisco?

Best airlines flying from St. Louis to San Francisco

Compare and see reviews for airlines that fly from St. Louis to San Francisco with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $128Free CancellationRating
5.8
3,080 reviews
Search Frontier flights
American AirlinesPriceFrom $182Free CancellationRating
7.2
11,052 reviews
Search American Airlines flights
United AirlinesPriceFrom $264Free CancellationRating
7.4
9,092 reviews
Search United Airlines flights
DeltaPriceFrom $264Free CancellationRating
7.9
8,008 reviews
Search Delta flights
SouthwestPriceFrom $309Free CancellationRating
7.9
4,250 reviews
Search Southwest flights

  • Southwest Flights From St. Louis to San Francisco

    Southwest is one of the most popular airlines flying from St. Louis to San Francisco, operating 6 flights/week on average for this route. A good Southwest flight deal for St. Louis to San Francisco starts from $309 round-trip, up to an average price of $460. Our users have rated Southwest at 7.9/10.

  • United Airlines Flights From St. Louis to San Francisco

    Another popular option for St. Louis to San Francisco flights is United Airlines (7.4/10, 9,092 ratings). United Airlines flies from St. Louis to San Francisco around 6 times per week, with deals starting from $264 round-trip and rising to an average price of around $428.

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
Bodega Bay
Roseville
Hayward
Calistoga
Big Sur
Berkeley
Santa Clara
Walnut Creek
Fremont
Daly City
Half Moon Bay
Vallejo
Salinas
Livermore
Sunnyvale
Turlock

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to San Francisco?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to San Francisco from St. Louis.

Can I find flights from St. Louis to San Francisco with flexible booking policies on momondo?

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

How can momondo help me find flights from St. Louis 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 St. Louis to San Francisco.

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

Yes. momondo can track prices for St. Louis 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.

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.
Start using Trips
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