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Cheap flights from San Francisco to St. Louis from $59

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Francisco to St. Louis departing on 3/10. 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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Find the cheapest flights from San Francisco to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
7:20 am - 3:53 pm
SFO
-
STL
6h 33m
1 stop
Frontier Logo
2:51 pm - 12:28 am
STL
-
SFO
11h 37m
1 stop
$126Frontier
Wed, Feb 25 - Sat, Feb 28
Frontier Logo
7:20 am - 3:53 pm
SFO
-
STL
6h 33m
1 stop
Frontier Logo
2:51 pm - 12:28 am
STL
-
SFO
11h 37m
1 stop
$148Frontier
Wed, Feb 25 - Sat, Feb 28
Frontier Logo
7:20 am - 3:53 pm
SFO
-
STL
6h 33m
1 stop
Frontier Logo
2:51 pm - 9:56 am
STL
-
SFO
21h 05m
2 stops
$156Frontier
Wed, Feb 25 - Sat, Feb 28
Frontier Logo
8:43 am - 9:26 pm
SFO
-
STL
10h 43m
1 stop
Frontier Logo
2:51 pm - 12:28 am
STL
-
SFO
11h 37m
1 stop
$165Frontier
Thu, Feb 26 - Sat, Feb 28
Frontier Logo
7:20 am - 3:53 pm
SFO
-
STL
6h 33m
1 stop
Frontier Logo
10:11 pm - 2:23 pm
STL
-
SFO
18h 12m
2 stops
$166Frontier
Wed, Feb 25 - Sun, Mar 1
Frontier Logo
11:16 pm - 6:51 am
SFO
-
STL
29h 35m
1 stop
Frontier Logo
8:12 pm - 11:29 pm
STL
-
SFO
29h 17m
1 stop
$167Frontier
Sat, Feb 28 - Sat, Mar 7
Frontier Logo
8:43 am - 11:19 am
SFO
-
STL
24h 36m
1 stop
Frontier Logo
8:12 pm - 8:09 pm
STL
-
SFO
25h 57m
1 stop
$172Frontier
Thu, Mar 5 - Mon, Mar 9
Frontier Logo
9:00 pm - 9:48 am
SFO
-
STL
10h 48m
1 stop
Frontier Logo
8:16 pm - 12:23 am
STL
-
SFO
6h 07m
1 stop
$180Frontier
Tue, Apr 7 - Wed, Apr 8
Frontier Logo
8:48 am - 1:09 pm
SFO
-
STL
26h 21m
1 stop
Frontier Logo
10:11 pm - 6:20 pm
STL
-
SFO
22h 09m
1 stop
$181Frontier
Thu, Feb 19 - Mon, Feb 23
Frontier Logo
7:15 pm - 9:26 pm
SFO
-
STL
24h 11m
1 stop
Frontier Logo
4:51 pm - 12:28 am
STL
-
SFO
9h 37m
1 stop
$185Frontier
Wed, Feb 18 - Wed, Feb 25

Frontier flights from San Francisco to St. Louis

Our best Frontier deals on San Francisco to St. Louis flight tickets
Frontier
Feb 25
SFO7:20 amSan Francisco
6h 33m
1 stop
STL3:53 pmLambert-St Louis
Feb 28
STL2:51 pmLambert-St Louis
11h 37m
1 stop
SFO12:28 amSan Francisco
$126
Frontier
Feb 25
SFO7:20 amSan Francisco
6h 33m
1 stop
STL3:53 pmLambert-St Louis
Feb 28
STL2:51 pmLambert-St Louis
11h 37m
1 stop
SFO12:28 amSan Francisco
$148
Frontier
Feb 25
SFO7:20 amSan Francisco
6h 33m
1 stop
STL3:53 pmLambert-St Louis
Feb 28
STL2:51 pmLambert-St Louis
21h 05m
2 stops
SFO9:56 amSan Francisco
$156

Delta flights from San Francisco to St. Louis

Our best Delta deals on San Francisco to St. Louis flight tickets
Delta
Feb 19
SFO10:20 amSan Francisco
11h 03m
2 stops
STL11:23 pmLambert-St Louis
Feb 23
STL2:22 pmLambert-St Louis
10h 19m
2 stops
SFO10:41 pmSan Francisco
$274
Delta
Jan 25
SFO10:30 amSan Francisco
10h 55m
2 stops
STL11:25 pmLambert-St Louis
Jan 29
STL6:10 amLambert-St Louis
11h 48m
2 stops
SFO3:58 pmSan Francisco
$1,015
Delta
Jan 25
SFO10:30 amSan Francisco
10h 55m
2 stops
STL11:25 pmLambert-St Louis
Jan 29
STL6:10 amLambert-St Louis
9h 33m
2 stops
SFO1:43 pmSan Francisco
$1,105

momondo Fare Finder

 
Customize your flight search to find flights from San Francisco to St. Louis 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 January 20, 2026.
Use the filters below to find and compare flights from San Francisco to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Wed 2/25

7:20 am-3:53 pm

1 stop6h 33m

Lambert-St Louis

Sat 2/28

2:51 pm-12:28 am

1 stop11h 37m

$126

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Wed 2/25

7:20 am-3:53 pm

1 stop6h 33m

Lambert-St Louis

Sat 2/28

2:51 pm-12:28 am

1 stop11h 37m

$148

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Wed 2/25

7:20 am-3:53 pm

1 stop6h 33m

Lambert-St Louis

Sat 2/28

2:51 pm-9:56 am

2 stops21h 05m

$156

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Thu 2/26

8:43 am-9:26 pm

1 stop10h 43m

Lambert-St Louis

Sat 2/28

2:51 pm-12:28 am

1 stop11h 37m

$165

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Wed 2/25

7:20 am-3:53 pm

1 stop6h 33m

Lambert-St Louis

Sun 3/1

10:11 pm-2:23 pm

2 stops18h 12m

$166

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Sat 2/28

11:16 pm-6:51 am

1 stop29h 35m

Lambert-St Louis

Sat 3/7

8:12 pm-11:29 pm

1 stop29h 17m

$167

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Thu 3/5

8:43 am-11:19 am

1 stop24h 36m

Lambert-St Louis

Mon 3/9

8:12 pm-8:09 pm

1 stop25h 57m

$172

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Tue 4/7

9:00 pm-9:48 am

1 stop10h 48m

Lambert-St Louis

Wed 4/8

8:16 pm-12:23 am

1 stop6h 07m

$180

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Thu 2/19

8:48 am-1:09 pm

1 stop26h 21m

Lambert-St Louis

Mon 2/23

10:11 pm-6:20 pm

1 stop22h 09m

$181

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Wed 2/18

7:15 pm-9:26 pm

1 stop24h 11m

Lambert-St Louis

Wed 2/25

4:51 pm-12:28 am

1 stop9h 37m

$185

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 St. Louis from

How to get the cheapest flight ticket from San Francisco to St. Louis

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 St. Louis?

In general, February is the cheapest month to fly from San Francisco to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $338. The month of January is another great option to travel to St. Louis, with average flight prices from San Francisco averaging around $384.

What is the cheapest day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Tuesday when prices can be found for as low as $429. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around $522. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from San Francisco at noon is the least expensive time of day to depart. momondo users have found prices as low as $401 when looking at flights departing at noon. In the afternoon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $521 per ticket.

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

Fly from San Francisco to Lambert-St Louis for the best San Francisco - Lambert-St Louis flight prices

How far in advance should I book a flight to St. Louis?

You are more likely to see cheaper flights to St. Louis from San Francisco when booking weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $432 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from San Francisco for as low as $369 on momondo.

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

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

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

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

As of January 2026, prices for San Francisco to St. Louis flights are approximately 50% more expensive when compared to flights at the same time last year.

When to book flights from San Francisco to St. Louis

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

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

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

Best Price Found

$239

Fastest flight time

3h 45m

Direct flights

Every day

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from San Francisco in the past 72 hours is $239. The best round-trip flight deal from San Francisco to St. Louis found on momondo in the last 72 hours is $372.
The fastest flight from San Francisco to St. Louis takes 3h 45m
Direct flights go from San Francisco to St. Louis every day.
There is 1 airport in St. Louis. From San Francisco there are direct flights to Lambert-St Louis (STL).
Search flight deals

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

    The straight-line distance from San Francisco to Lambert-St Louis is 1739.7 mi. 3h 45m is a normal flight duration for this route.

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

    Prices for flights from San Francisco Airport to Lambert-St Louis Airport are refreshed on a daily basis.

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

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

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The travel and health documents you'll need for your trip to Lambert-St Louis 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 Lambert-St Louis 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 San Francisco to St. Louis?

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

Best airlines flying from San Francisco to St. Louis

Compare and see reviews for airlines that fly from San Francisco to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $117Free CancellationRating
5.7
3,056 reviews
Search Frontier flights
DeltaPriceFrom $189Free CancellationRating
7.9
8,076 reviews
Search Delta flights
American AirlinesPriceFrom $202Free CancellationRating
7.2
11,164 reviews
Search American Airlines flights
United AirlinesPriceFrom $288Free CancellationRating
7.4
9,180 reviews
Search United Airlines flights
SouthwestPriceFrom $319Free CancellationRating
8.0
4,267 reviews
Search Southwest flights

  • Southwest Flights From San Francisco to St. Louis

    The lowest priced Southwest flight from San Francisco to St. Louis from the last 72 hours was $319. Generally, Southwest has 7 flights on this route every week with an average price of $493. Southwest is rated 8.0/10 by our users.

  • United Airlines Flights From San Francisco to St. Louis

    Another popular option for San Francisco to St. Louis flights is United Airlines (7.4/10, 9,180 ratings). United Airlines flies from San Francisco to St. Louis around 6 times per week, with deals starting from $288 round-trip and rising to an average price of around $465.

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Hermann
Fairview Heights
Maryland Heights
Florissant
O'Fallon
Fenton
Collinsville
St. Peters
Wentzville
Alton
Farmington
Clayton
Eureka
Edwardsville
Festus
Glencoe
Litchfield
Shrewsbury

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from San Francisco to St. Louis for you.

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

Yes. momondo allows you to filter the results for San Francisco to St. Louis flights to just show those with flexible booking policies.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to St. Louis from San Francisco.

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

Price alerts on flights to St. Louis from San Francisco are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your St. Louis 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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