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Cheap flights from San Francisco to St. Louis from $81

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 8/19. 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

American Airlines Logo
10:00 am - 11:07 pmSFO-STL
11h 07m1 stop
American Airlines Logo
5:00 pm - 11:03 pmSTL-SFO
8h 03m1 stop
$178American Airlines
Find Deal
Tue, Sep 30 - Mon, Oct 6
American Airlines Logo
12:51 pm - 11:05 pmSFO-STL
8h 14m1 stop
American Airlines Logo
6:06 am - 12:21 pmSTL-SFO
8h 15m1 stop
$181American Airlines
Find Deal
Wed, Aug 13 - Wed, Aug 20
United Airlines Logo
10:45 am - 4:45 pmSFO-STL
4h 00mnonstop
United Airlines Logo
5:47 pm - 8:08 pmSTL-SFO
4h 21mnonstop
$183United Airlines
Find Deal
Tue, Oct 14 - Sat, Oct 18
United Airlines Logo
10:51 am - 4:53 pmSFO-STL
4h 02mnonstop
United Airlines Logo
5:49 pm - 8:10 pmSTL-SFO
4h 21mnonstop
$185United Airlines
Find Deal
Mon, Aug 25 - Wed, Aug 27
Southwest Logo
8:00 am - 5:50 pmSFO-STL
7h 50m2 stops
Southwest Logo
6:20 am - 4:45 pmSTL-SFO
12h 25m1 stop
$195Southwest
Find Deal
Wed, Oct 15 - Sat, Oct 18
American Airlines Logo
12:45 am - 9:00 amSFO-STL
6h 15m1 stop
American Airlines Logo
6:14 pm - 10:40 pmSTL-SFO
6h 26m1 stop
$203American Airlines
Find Deal
Sat, Aug 16 - Thu, Aug 21
Southwest Logo
6:50 am - 5:10 pmSFO-STL
8h 20m1 stop
Southwest Logo
9:40 am - 11:50 amSTL-SFO
4h 10mnonstop
$220Southwest
Find Deal
Sat, Aug 23 - Sat, Aug 30
Frontier Logo
5:45 am - 1:42 pmSFO-STL
5h 57m1 stop
Frontier Logo
7:29 pm - 12:19 amSTL-SFO
6h 50m1 stop
$250Frontier
Find Deal
Thu, Aug 14 - Mon, Aug 18
Frontier Logo
5:45 am - 8:44 pmSFO-STL
12h 59m1 stop
Frontier Logo
7:55 pm - 12:16 amSTL-SFO
6h 21m1 stop
$253Frontier
Find Deal
Mon, Sep 8 - Sun, Sep 14
Delta Logo
12:35 am - 8:34 amSFO-STL
5h 59m1 stop
Delta Logo
3:40 pm - 10:49 pmSTL-SFO
9h 09m1 stop
$257Delta
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Tue, Aug 12 - Wed, Aug 20

American Airlines flights from San Francisco to St. Louis

Our best American Airlines deals on San Francisco to St. Louis flight tickets
American Airlines
Sep 30
SFO10:00 amSan Francisco
11h 07m
1 stop
STL11:07 pmLambert-St Louis
Oct 6
STL5:00 pmLambert-St Louis
8h 03m
1 stop
SFO11:03 pmSan Francisco
$178
Find similar
American Airlines
Aug 13
SFO12:51 pmSan Francisco
8h 14m
1 stop
STL11:05 pmLambert-St Louis
Aug 20
STL6:06 amLambert-St Louis
8h 15m
1 stop
SFO12:21 pmSan Francisco
$181
Find similar
American Airlines
Aug 16
SFO12:45 amSan Francisco
6h 15m
1 stop
STL9:00 amLambert-St Louis
Aug 21
STL6:14 pmLambert-St Louis
6h 26m
1 stop
SFO10:40 pmSan Francisco
$203
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Alaska Airlines flights from San Francisco to St. Louis

Our best Alaska Airlines deals on San Francisco to St. Louis flight tickets
Alaska Airlines
Sep 18
SFO7:00 amSan Francisco
8h 34m
1 stop
STL5:34 pmLambert-St Louis
Sep 24
STL3:35 pmLambert-St Louis
7h 45m
1 stop
SFO9:20 pmSan Francisco
$213
Find similar
Alaska Airlines
Sep 18
SFO7:00 amSan Francisco
8h 34m
1 stop
STL5:34 pmLambert-St Louis
Sep 22
STL6:30 pmLambert-St Louis
7h 34m
1 stop
SFO12:04 amSan Francisco
$224
Find similar
Alaska Airlines
Sep 9
SFO5:14 pmSan Francisco
19h 27m
2 stops
STL2:41 pmLambert-St Louis
Sep 15
STL3:35 pmLambert-St Louis
10h 29m
1 stop
SFO12:04 amSan Francisco
$276
Find similar

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 $329. 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 $418. 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 $467. 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 $414 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 $452 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 $398 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 $359 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 6% 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 July 2025, prices for San Francisco to St. Louis flights are approximately 33% 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

$81

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 $81. The best round-trip flight deal from San Francisco to St. Louis found on momondo in the last 72 hours is $178.
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)
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  • 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 55m 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 $108Free CancellationRating
5.9
3,271 reviews
Search Frontier flights
American AirlinesPriceFrom $236Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $246Free CancellationRating
8.0
7,952 reviews
Search Delta flights
United AirlinesPriceFrom $296Free CancellationRating
7.4
8,846 reviews
Search United Airlines flights
SouthwestPriceFrom $312Free CancellationRating
8.0
4,250 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 $312. Generally, Southwest has 8 flights on this route every week with an average price of $446. 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, 8,846 ratings). United Airlines flies from San Francisco to St. Louis around 9 times per week, with deals starting from $296 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
Maryland Heights
Florissant
Collinsville
Fenton
Farmington
O'Fallon
St. Peters
Alton
Wentzville
Festus
Glencoe
Clayton
Eureka
Edwardsville
Grafton
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.
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