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Cheap flights from San Francisco to St. Louis from $61

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 12/9. 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 San Francisco to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
6:32 am - 10:02 amSFO-STL
25h 30m1 stop
Frontier Logo
10:44 pm - 7:48 amSTL-SFO
11h 04m1 stop
$290Frontier
Find Deal
Fri, Nov 21 - Fri, Dec 5
Frontier Logo
6:00 am - 11:16 amSFO-STL
27h 16m1 stop
Frontier Logo
9:54 pm - 7:51 amSTL-SFO
11h 57m1 stop
$292Frontier
Find Deal
Thu, Nov 20 - Tue, Nov 25
Frontier Logo
9:30 pm - 9:25 pmSFO-STL
45h 55m2 stops
Frontier Logo
10:10 pm - 9:08 pmSTL-SFO
24h 58m1 stop
$293Frontier
Find Deal
Sat, Dec 20 - Mon, Jan 5
Delta Logo
10:30 am - 11:25 pmSFO-STL
10h 55m2 stops
Delta Logo
6:10 am - 3:58 pmSTL-SFO
11h 48m2 stops
$295Delta
Find Deal
Tue, Jan 27 - Sun, Feb 1
Alaska Airlines Logo
8:31 pm - 2:27 pmSFO-STL
15h 56m1 stop
Alaska Airlines Logo
7:00 am - 6:03 pmSTL-SFO
13h 03m1 stop
$310Alaska Airlines
Find Deal
Sat, Dec 6 - Tue, Dec 9
Alaska Airlines Logo
9:00 am - 11:59 pmSFO-STL
12h 59m1 stop
Alaska Airlines Logo
7:00 am - 2:03 pmSTL-SFO
9h 03m1 stop
$312Alaska Airlines
Find Deal
Thu, Dec 4 - Tue, Dec 9
Delta Logo
5:45 am - 7:10 pmSFO-STL
11h 25m2 stops
Delta Logo
2:20 pm - 10:31 pmSTL-SFO
10h 11m2 stops
$314Delta
Find Deal
Thu, Dec 4 - Mon, Dec 8
Multiple Airlines Logo
6:50 pm - 1:52 pmSFO-STL
17h 02m2 stops
Multiple Airlines Logo
7:43 pm - 12:25 amSTL-SFO
6h 42m1 stop
$358Multiple Airlines
Find Deal
Fri, Mar 6 - Tue, Mar 10
Multiple Airlines Logo
6:00 am - 4:24 pmSFO-STL
8h 24m1 stop
Multiple Airlines Logo
5:19 pm - 3:12 pmSTL-SFO
23h 53m2 stops
$364Multiple Airlines
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Wed, Dec 24 - Wed, Dec 31
United Airlines Logo
10:35 am - 4:27 pmSFO-STL
3h 52mnonstop
United Airlines Logo
5:30 pm - 8:08 pmSTL-SFO
4h 38mnonstop
$387United Airlines
Find Deal
Wed, Dec 3 - Wed, Dec 10

Delta flights from San Francisco to St. Louis

Our best Delta deals on San Francisco to St. Louis flight tickets
Delta
Jan 27
SFO10:30 amSan Francisco
10h 55m
2 stops
STL11:25 pmLambert-St Louis
Feb 1
STL6:10 amLambert-St Louis
11h 48m
2 stops
SFO3:58 pmSan Francisco
$295
Find similar
Delta
Dec 4
SFO5:45 amSan Francisco
11h 25m
2 stops
STL7:10 pmLambert-St Louis
Dec 8
STL2:20 pmLambert-St Louis
10h 11m
2 stops
SFO10:31 pmSan Francisco
$314
Find similar
Delta
Nov 27
SFO5:45 amSan Francisco
9h 04m
1 stop
STL4:49 pmLambert-St Louis
Dec 4
STL2:20 pmLambert-St Louis
10h 11m
2 stops
SFO10:31 pmSan Francisco
$316
Find similar

Frontier flights from San Francisco to St. Louis

Our best Frontier deals on San Francisco to St. Louis flight tickets
Frontier
Nov 13
SFO8:55 pmSan Francisco
12h 29m
1 stop
STL11:24 amLambert-St Louis
Nov 25
STL9:54 pmLambert-St Louis
11h 57m
1 stop
SFO7:51 amSan Francisco
$273
Find similar
Frontier
Nov 10
SFO5:45 amSan Francisco
6h 12m
1 stop
STL1:57 pmLambert-St Louis
Nov 24
STL7:43 pmLambert-St Louis
6h 41m
1 stop
SFO12:24 amSan Francisco
$282
Find similar
Frontier
Nov 21
SFO6:32 amSan Francisco
25h 30m
1 stop
STL10:02 amLambert-St Louis
Dec 5
STL10:44 pmLambert-St Louis
11h 04m
1 stop
SFO7:48 amSan Francisco
$290
Find similar

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 November 5, 2025.
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

Fri 11/21

6:32 am-10:02 am

1 stop25h 30m

Lambert-St Louis

Fri 12/5

10:44 pm-7:48 am

1 stop11h 04m

$290

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Thu 11/20

6:00 am-11:16 am

1 stop27h 16m

Lambert-St Louis

Tue 11/25

9:54 pm-7:51 am

1 stop11h 57m

$292

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Sat 12/20

9:30 pm-9:25 pm

2 stops45h 55m

Lambert-St Louis

Mon 1/5

10:10 pm-9:08 pm

1 stop24h 58m

$293

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Tue 1/27

10:30 am-11:25 pm

2 stops10h 55m

Lambert-St Louis

Sun 2/1

6:10 am-3:58 pm

2 stops11h 48m

$295

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Sat 12/6

8:31 pm-2:27 pm

1 stop15h 56m

Lambert-St Louis

Tue 12/9

7:00 am-6:03 pm

1 stop13h 03m

$310

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Thu 12/4

9:00 am-11:59 pm

1 stop12h 59m

Lambert-St Louis

Tue 12/9

7:00 am-2:03 pm

1 stop9h 03m

$312

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Thu 12/4

5:45 am-7:10 pm

2 stops11h 25m

Lambert-St Louis

Mon 12/8

2:20 pm-10:31 pm

2 stops10h 11m

$314

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Fri 3/6

6:50 pm-1:52 pm

2 stops17h 02m

Lambert-St Louis

Tue 3/10

7:43 pm-12:25 am

1 stop6h 42m

$358

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Wed 12/24

6:00 am-4:24 pm

1 stop8h 24m

Lambert-St Louis

Wed 12/31

5:19 pm-3:12 pm

2 stops23h 53m

$364

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Wed 12/3

10:35 am-4:27 pm

Nonstop3h 52m

Lambert-St Louis

Wed 12/10

5:30 pm-8:08 pm

Nonstop4h 38m

$387

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 typical price of a round-trip flight between San Francisco and St. Louis?

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 $332. The month of January is another great option to travel to St. Louis, with average flight prices from San Francisco averaging around $334.

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 $426. 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 $481. 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 $423 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 $460 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 $404 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 $320 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?

You could potentially save up to 2% on your flight if you consider stops on a San Francisco to St. Louis flight.

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

As of November 2025, prices for San Francisco to St. Louis flights are approximately 2% cheaper 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

$204

Fastest flight time

3h 40m

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 $204. The best round-trip flight deal from San Francisco to St. Louis found on momondo in the last 72 hours is $411.
The fastest flight from San Francisco to St. Louis takes 3h 40m
Direct flights go from San Francisco to St. Louis every day.
There is 1 airport near St. Louis: 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 52m 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 $130Free CancellationRating
5.8
3,116 reviews
Search Frontier flights
DeltaPriceFrom $173Free CancellationRating
7.9
8,004 reviews
Search Delta flights
American AirlinesPriceFrom $216Free CancellationRating
7.2
11,042 reviews
Search American Airlines flights
United AirlinesPriceFrom $282Free CancellationRating
7.4
9,002 reviews
Search United Airlines flights
SouthwestPriceFrom $306Free CancellationRating
8.0
4,240 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 $306. Generally, Southwest has 3 flights on this route every week with an average price of $471. 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, 9,002 ratings). United Airlines flies from San Francisco to St. Louis around 6 times per week, with deals starting from $282 round-trip and rising to an average price of around $439.

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
Florissant
Maryland Heights
O'Fallon
Wentzville
Fenton
Collinsville
St. Peters
Alton
Farmington
Festus
Glencoe
Edwardsville
Clayton
Eureka
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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