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Cheap flights from St. Louis to San Francisco from $80

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 12/8. 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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0 bags

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Cheap round-trip flights

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Frontier Logo
8:40 pm - 10:27 pmSTL-SFO
27h 47m1 stop
Frontier Logo
10:23 pm - 10:12 amSFO-STL
9h 49m1 stop
$177Frontier
Find Deal
Fri, Oct 31 - Sat, Nov 8
Frontier Logo
8:40 pm - 10:27 pmSTL-SFO
27h 47m1 stop
Frontier Logo
3:25 pm - 9:07 amSFO-STL
15h 42m1 stop
$178Frontier
Find Deal
Fri, Oct 31 - Mon, Nov 3
Frontier Logo
6:22 pm - 12:15 pmSTL-SFO
19h 53m1 stop
Frontier Logo
3:15 pm - 9:07 amSFO-STL
15h 52m2 stops
$188Frontier
Find Deal
Thu, Nov 13 - Mon, Nov 17
Frontier Logo
7:45 pm - 4:43 pmSTL-SFO
22h 58m2 stops
Frontier Logo
6:34 am - 9:07 amSFO-STL
24h 33m1 stop
$189Frontier
Find Deal
Tue, Nov 11 - Sat, Nov 15
Frontier Logo
7:45 pm - 12:14 amSTL-SFO
6h 29m1 stop
Frontier Logo
8:55 pm - 11:24 amSFO-STL
12h 29m1 stop
$194Frontier
Find Deal
Fri, Nov 7 - Sun, Nov 9
Frontier Logo
7:45 pm - 10:27 pmSTL-SFO
28h 42m1 stop
Frontier Logo
8:02 am - 9:07 amSFO-STL
23h 05m1 stop
$195Frontier
Find Deal
Fri, Nov 14 - Tue, Nov 18
Frontier Logo
8:40 pm - 10:27 pmSTL-SFO
27h 47m1 stop
Frontier Logo
8:09 pm - 9:07 amSFO-STL
10h 58m1 stop
$196Frontier
Find Deal
Tue, Oct 28 - Fri, Oct 31
Delta Logo
6:00 am - 3:57 pmSTL-SFO
11h 57m2 stops
Delta Logo
1:58 pm - 12:50 amSFO-STL
8h 52m2 stops
$254Delta
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Wed, Dec 10 - Sat, Dec 13
Multiple Airlines Logo
7:45 pm - 12:14 amSTL-SFO
6h 29m1 stop
Multiple Airlines Logo
8:00 am - 11:59 pmSFO-STL
13h 59m2 stops
$267Multiple Airlines
Find Deal
Thu, Nov 6 - Sun, Nov 9
Delta Logo
6:00 am - 3:57 pmSTL-SFO
11h 57m2 stops
Delta Logo
10:31 am - 9:37 pmSFO-STL
9h 06m2 stops
$270Delta
Find Deal
Thu, Dec 11 - Sat, Jan 17

Delta flights from St. Louis to San Francisco

Our best Delta deals on St. Louis to San Francisco flight tickets
Delta
Dec 10
STL6:00 amLambert-St Louis
11h 57m
2 stops
SFO3:57 pmSan Francisco
Dec 13
SFO1:58 pmSan Francisco
8h 52m
2 stops
STL12:50 amLambert-St Louis
$254
Find similar
Delta
Dec 11
STL6:00 amLambert-St Louis
11h 57m
2 stops
SFO3:57 pmSan Francisco
Jan 17
SFO10:31 amSan Francisco
9h 06m
2 stops
STL9:37 pmLambert-St Louis
$270
Find similar
Delta
Oct 28
STL6:50 amLambert-St Louis
11h 15m
2 stops
SFO4:05 pmSan Francisco
Nov 1
SFO10:35 amSan Francisco
10h 32m
2 stops
STL11:07 pmLambert-St Louis
$494
Find similar

Frontier flights from St. Louis to San Francisco

Our best Frontier deals on St. Louis to San Francisco flight tickets
Frontier
Oct 31
STL8:40 pmLambert-St Louis
27h 47m
1 stop
SFO10:27 pmSan Francisco
Nov 8
SFO10:23 pmSan Francisco
9h 49m
1 stop
STL10:12 amLambert-St Louis
$177
Find similar
Frontier
Oct 31
STL8:40 pmLambert-St Louis
27h 47m
1 stop
SFO10:27 pmSan Francisco
Nov 3
SFO3:25 pmSan Francisco
15h 42m
1 stop
STL9:07 amLambert-St Louis
$178
Find similar
Frontier
Nov 13
STL6:22 pmLambert-St Louis
19h 53m
1 stop
SFO12:15 pmSan Francisco
Nov 17
SFO3:15 pmSan Francisco
15h 52m
2 stops
STL9:07 amLambert-St Louis
$188
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 October 14, 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

Fri 10/31

8:40 pm-10:27 pm

1 stop27h 47m

San Francisco

Sat 11/8

10:23 pm-10:12 am

1 stop9h 49m

$177

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Fri 10/31

8:40 pm-10:27 pm

1 stop27h 47m

San Francisco

Mon 11/3

3:25 pm-9:07 am

1 stop15h 42m

$178

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Thu 11/13

6:22 pm-12:15 pm

1 stop19h 53m

San Francisco

Mon 11/17

3:15 pm-9:07 am

2 stops15h 52m

$188

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Tue 11/11

7:45 pm-4:43 pm

2 stops22h 58m

San Francisco

Sat 11/15

6:34 am-9:07 am

1 stop24h 33m

$189

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Fri 11/7

7:45 pm-12:14 am

1 stop6h 29m

San Francisco

Sun 11/9

8:55 pm-11:24 am

1 stop12h 29m

$194

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Fri 11/14

7:45 pm-10:27 pm

1 stop28h 42m

San Francisco

Tue 11/18

8:02 am-9:07 am

1 stop23h 05m

$195

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Tue 10/28

8:40 pm-10:27 pm

1 stop27h 47m

San Francisco

Fri 10/31

8:09 pm-9:07 am

1 stop10h 58m

$196

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Wed 12/10

6:00 am-3:57 pm

2 stops11h 57m

San Francisco

Sat 12/13

1:58 pm-12:50 am

2 stops8h 52m

$254

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Thu 11/6

7:45 pm-12:14 am

1 stop6h 29m

San Francisco

Sun 11/9

8:00 am-11:59 pm

2 stops13h 59m

$267

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Thu 12/11

6:00 am-3:57 pm

2 stops11h 57m

San Francisco

Sat 1/17

10:31 am-9:37 pm

2 stops9h 06m

$270

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 January, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $338.

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 $587. The most expensive day to fly to San Francisco is Sunday, with ticket prices averaging around $1,035.

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 $466. Flights in the evening are often more expensive with an average ticket price of $1,187.

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 $378 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 $322 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.

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

As of October 2025, prices for St. Louis to San Francisco flights are approximately 11% 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

$198

Fastest flight time

4h 15m

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 $198. The best round-trip flight deal from St. Louis to San Francisco found on momondo in the last 72 hours is $403.
The fastest flight from St. Louis to San Francisco takes 4h 15m
Direct flights go from St. Louis to San Francisco every day.
There is 1 airport near San Francisco: 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 6h 29m.

  • 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 $118Free CancellationRating
5.8
3,135 reviews
Search Frontier flights
American AirlinesPriceFrom $192Free CancellationRating
7.2
11,042 reviews
Search American Airlines flights
United AirlinesPriceFrom $228Free CancellationRating
7.4
8,976 reviews
Search United Airlines flights
DeltaPriceFrom $256Free CancellationRating
7.9
7,975 reviews
Search Delta flights
SouthwestPriceFrom $305Free CancellationRating
8.0
4,238 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 7 flights/week on average for this route. A good Southwest flight deal for St. Louis to San Francisco starts from $305 round-trip, up to an average price of $439. Our users have rated Southwest at 8.0/10.

  • 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, 8,976 ratings). United Airlines flies from St. Louis to San Francisco around 6 times per week, with deals starting from $228 round-trip and rising to an average price of around $405.

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
Calistoga
Hayward
Roseville
Big Sur
Santa Clara
Fremont
Daly City
Berkeley
Walnut Creek
Half Moon Bay
Vallejo
Salinas
Redwood City
Turlock
South San Francisco

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.
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