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Cheap flights from San Francisco to St. Louis 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 San Francisco to St. Louis departing on 11/2. 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

Frontier Logo
7:10 am - 9:06 amSFO-STL
23h 56m1 stop
Frontier Logo
7:52 pm - 10:55 amSTL-SFO
17h 03m2 stops
$214Frontier
Find Deal
Wed, Sep 24 - Tue, Oct 7
Frontier Logo
7:10 am - 9:06 amSFO-STL
23h 56m1 stop
Frontier Logo
7:55 pm - 1:17 pmSTL-SFO
19h 22m1 stop
$215Frontier
Find Deal
Wed, Oct 1 - Sun, Oct 5
Southwest Logo
2:05 pm - 12:30 amSFO-STL
8h 25m2 stops
Southwest Logo
5:10 pm - 10:45 pmSTL-SFO
7h 35m1 stop
$224Southwest
Find Deal
Tue, Oct 7 - Tue, Oct 14
Southwest Logo
6:00 am - 11:50 amSFO-STL
3h 50mnonstop
Southwest Logo
1:55 pm - 8:20 pmSTL-SFO
8h 25m1 stop
$225Southwest
Find Deal
Sat, Nov 1 - Sat, Nov 8
United Airlines Logo
10:40 am - 4:54 pmSFO-STL
4h 14mnonstop
United Airlines Logo
5:35 pm - 8:10 pmSTL-SFO
4h 35mnonstop
$229United Airlines
Find Deal
Wed, Oct 1 - Sat, Oct 4
United Airlines Logo
10:40 am - 4:54 pmSFO-STL
4h 14mnonstop
United Airlines Logo
5:35 pm - 8:10 pmSTL-SFO
4h 35mnonstop
$253United Airlines
Find Deal
Tue, Sep 30 - Sat, Oct 4
Delta Logo
11:57 pm - 9:59 amSFO-STL
8h 02m1 stop
Delta Logo
3:30 pm - 11:33 pmSTL-SFO
10h 03m2 stops
$255Delta
Find Deal
Wed, Oct 1 - Tue, Oct 7
Delta Logo
12:45 am - 11:30 amSFO-STL
8h 45m1 stop
Delta Logo
7:05 am - 1:35 pmSTL-SFO
8h 30m1 stop
$257Delta
Find Deal
Fri, Oct 3 - Tue, Oct 7
American Airlines Logo
12:50 am - 8:53 amSFO-STL
6h 03m1 stop
American Airlines Logo
5:20 am - 10:34 amSTL-SFO
7h 14m1 stop
$268American Airlines
Find Deal
Fri, Oct 17 - Wed, Oct 22
American Airlines Logo
11:18 pm - 8:09 amSFO-STL
6h 51m1 stop
American Airlines Logo
1:43 pm - 8:30 pmSTL-SFO
8h 47m1 stop
$270American Airlines
Find Deal
Tue, Nov 25 - Tue, Dec 9

Frontier flights from San Francisco to St. Louis

Our best Frontier deals on San Francisco to St. Louis flight tickets
Frontier
Sep 24
SFO7:10 amSan Francisco
23h 56m
1 stop
STL9:06 amLambert-St Louis
Oct 7
STL7:52 pmLambert-St Louis
17h 03m
2 stops
SFO10:55 amSan Francisco
$214
Find similar
Frontier
Oct 1
SFO7:10 amSan Francisco
23h 56m
1 stop
STL9:06 amLambert-St Louis
Oct 5
STL7:55 pmLambert-St Louis
19h 22m
1 stop
SFO1:17 pmSan Francisco
$215
Find similar
Frontier
Oct 10
SFO8:21 pmSan Francisco
10h 46m
1 stop
STL9:07 amLambert-St Louis
Oct 13
STL7:52 pmLambert-St Louis
17h 03m
2 stops
SFO10:55 amSan Francisco
$217
Find similar

United Airlines flights from San Francisco to St. Louis

Our best United Airlines deals on San Francisco to St. Louis flight tickets
United Airlines
Oct 1
SFO10:40 amSan Francisco
4h 14m
STL4:54 pmLambert-St Louis
Oct 4
STL5:35 pmLambert-St Louis
4h 35m
SFO8:10 pmSan Francisco
$229
Find similar
United Airlines
Sep 30
SFO10:40 amSan Francisco
4h 14m
STL4:54 pmLambert-St Louis
Oct 4
STL5:35 pmLambert-St Louis
4h 35m
SFO8:10 pmSan Francisco
$253
Find similar
United Airlines
Nov 13
SFO10:35 amSan Francisco
3h 52m
STL4:27 pmLambert-St Louis
Nov 16
STL5:29 pmLambert-St Louis
4h 38m
SFO8:07 pmSan Francisco
$264
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 September 11, 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

Wed 9/24

7:10 am-9:06 am

1 stop23h 56m

Lambert-St Louis

Tue 10/7

7:52 pm-10:55 am

2 stops17h 03m

$214

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Wed 10/1

7:10 am-9:06 am

1 stop23h 56m

Lambert-St Louis

Sun 10/5

7:55 pm-1:17 pm

1 stop19h 22m

$215

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Tue 10/7

2:05 pm-12:30 am

2 stops8h 25m

Lambert-St Louis

Tue 10/14

5:10 pm-10:45 pm

1 stop7h 35m

$224

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Sat 11/1

6:00 am-11:50 am

Nonstop3h 50m

Lambert-St Louis

Sat 11/8

1:55 pm-8:20 pm

1 stop8h 25m

$225

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Wed 10/1

10:40 am-4:54 pm

Nonstop4h 14m

Lambert-St Louis

Sat 10/4

5:35 pm-8:10 pm

Nonstop4h 35m

$229

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Tue 9/30

10:40 am-4:54 pm

Nonstop4h 14m

Lambert-St Louis

Sat 10/4

5:35 pm-8:10 pm

Nonstop4h 35m

$253

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Wed 10/1

11:57 pm-9:59 am

1 stop8h 02m

Lambert-St Louis

Tue 10/7

3:30 pm-11:33 pm

2 stops10h 03m

$255

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Fri 10/3

12:45 am-11:30 am

1 stop8h 45m

Lambert-St Louis

Tue 10/7

7:05 am-1:35 pm

1 stop8h 30m

$257

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Fri 10/17

12:50 am-8:53 am

1 stop6h 03m

Lambert-St Louis

Wed 10/22

5:20 am-10:34 am

1 stop7h 14m

$268

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Tue 11/25

11:18 pm-8:09 am

1 stop6h 51m

Lambert-St Louis

Tue 12/9

1:43 pm-8:30 pm

1 stop8h 47m

$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 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, January 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 $328. The month of February is another great option to travel to St. Louis, with average flight prices from San Francisco averaging around $339.

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 $423. 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 Sunday because tickets tend to average around $469. 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 $412 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 $445 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 $340 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 September 2025, prices for San Francisco to St. Louis flights are approximately 53% 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

$188

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 $188. The best round-trip flight deal from San Francisco to St. Louis found on momondo in the last 72 hours is $376.
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 50m 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 $110Free CancellationRating
5.8
3,177 reviews
Search Frontier flights
DeltaPriceFrom $189Free CancellationRating
7.9
7,960 reviews
Search Delta flights
American AirlinesPriceFrom $216Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $287Free CancellationRating
7.4
8,937 reviews
Search United Airlines flights
SouthwestPriceFrom $306Free CancellationRating
8.0
4,248 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 8 flights on this route every week with an average price of $450. 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, 8,937 ratings). United Airlines flies from San Francisco to St. Louis around 6 times per week, with deals starting from $287 round-trip and rising to an average price of around $435.

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
Fenton
Collinsville
Wentzville
Alton
St. Peters
Farmington
Festus
Glencoe
Clayton
Edwardsville
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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