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Cheap flights from San Francisco to St. Louis from $55

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 12/4. 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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Cheap round-trip flights

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Frontier Logo
6:41 am - 6:58 pmSFO-STL
10h 17m1 stop
Frontier Logo
7:43 pm - 6:55 pmSTL-SFO
25h 12m1 stop
$217Frontier
Find Deal
Thu, Nov 27 - Wed, Dec 3
Frontier Logo
9:08 am - 9:07 amSFO-STL
45h 59m2 stops
Frontier Logo
8:40 pm - 9:33 amSTL-SFO
14h 53m1 stop
$221Frontier
Find Deal
Sun, Oct 26 - Wed, Oct 29
Frontier Logo
12:43 pm - 9:07 amSFO-STL
18h 24m1 stop
Frontier Logo
7:57 pm - 9:03 pmSTL-SFO
27h 06m2 stops
$223Frontier
Find Deal
Thu, Nov 13 - Thu, Nov 20
Frontier Logo
6:41 am - 6:58 pmSFO-STL
10h 17m1 stop
Frontier Logo
7:43 pm - 1:23 pmSTL-SFO
19h 40m2 stops
$225Frontier
Find Deal
Thu, Nov 27 - Wed, Dec 3
Frontier Logo
8:21 pm - 9:22 amSFO-STL
35h 01m2 stops
Frontier Logo
8:40 pm - 9:33 amSTL-SFO
14h 53m1 stop
$227Frontier
Find Deal
Fri, Oct 24 - Wed, Oct 29
Frontier Logo
7:30 pm - 9:07 amSFO-STL
35h 37m2 stops
Frontier Logo
7:45 pm - 9:33 amSTL-SFO
15h 48m1 stop
$229Frontier
Find Deal
Sat, Nov 8 - Sat, Nov 15
Delta Logo
10:35 am - 9:23 pmSFO-STL
8h 48m2 stops
Delta Logo
6:00 am - 3:57 pmSTL-SFO
11h 57m2 stops
$274Delta
Find Deal
Sat, Nov 8 - Sat, Nov 15
Delta Logo
7:00 pm - 9:44 amSFO-STL
12h 44m2 stops
Delta Logo
7:00 am - 4:01 pmSTL-SFO
11h 01m2 stops
$290Delta
Find Deal
Wed, Jan 28 - Mon, Feb 2
Delta Logo
5:50 am - 7:10 pmSFO-STL
11h 20m2 stops
Delta Logo
6:30 am - 3:57 pmSTL-SFO
11h 27m2 stops
$306Delta
Find Deal
Thu, Dec 4 - Mon, Dec 8
Multiple Airlines Logo
8:00 am - 4:49 pmSFO-STL
6h 49m1 stop
Multiple Airlines Logo
2:55 pm - 10:18 pmSTL-SFO
9h 23m1 stop
$311Multiple Airlines
Find Deal
Wed, Feb 25 - Tue, Mar 3

Frontier flights from San Francisco to St. Louis

Our best Frontier deals on San Francisco to St. Louis flight tickets
Frontier
Nov 27
SFO6:41 amSan Francisco
10h 17m
1 stop
STL6:58 pmLambert-St Louis
Dec 3
STL7:43 pmLambert-St Louis
25h 12m
1 stop
SFO6:55 pmSan Francisco
$217
Find similar
Frontier
Oct 26
SFO9:08 amSan Francisco
45h 59m
2 stops
STL9:07 amLambert-St Louis
Oct 29
STL8:40 pmLambert-St Louis
14h 53m
1 stop
SFO9:33 amSan Francisco
$221
Find similar
Frontier
Nov 13
SFO12:43 pmSan Francisco
18h 24m
1 stop
STL9:07 amLambert-St Louis
Nov 20
STL7:57 pmLambert-St Louis
27h 06m
2 stops
SFO9:03 pmSan Francisco
$223
Find similar

Delta flights from San Francisco to St. Louis

Our best Delta deals on San Francisco to St. Louis flight tickets
Delta
Nov 8
SFO10:35 amSan Francisco
8h 48m
2 stops
STL9:23 pmLambert-St Louis
Nov 15
STL6:00 amLambert-St Louis
11h 57m
2 stops
SFO3:57 pmSan Francisco
$274
Find similar
Delta
Jan 28
SFO7:00 pmSan Francisco
12h 44m
2 stops
STL9:44 amLambert-St Louis
Feb 2
STL7:00 amLambert-St Louis
11h 01m
2 stops
SFO4:01 pmSan Francisco
$290
Find similar
Delta
Dec 4
SFO5:50 amSan Francisco
11h 20m
2 stops
STL7:10 pmLambert-St Louis
Dec 8
STL6:30 amLambert-St Louis
11h 27m
2 stops
SFO3:57 pmSan Francisco
$306
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 October 13, 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

Thu 11/27

6:41 am-6:58 pm

1 stop10h 17m

Lambert-St Louis

Wed 12/3

7:43 pm-6:55 pm

1 stop25h 12m

$217

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Sun 10/26

9:08 am-9:07 am

2 stops45h 59m

Lambert-St Louis

Wed 10/29

8:40 pm-9:33 am

1 stop14h 53m

$221

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Thu 11/13

12:43 pm-9:07 am

1 stop18h 24m

Lambert-St Louis

Thu 11/20

7:57 pm-9:03 pm

2 stops27h 06m

$223

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Thu 11/27

6:41 am-6:58 pm

1 stop10h 17m

Lambert-St Louis

Wed 12/3

7:43 pm-1:23 pm

2 stops19h 40m

$225

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Fri 10/24

8:21 pm-9:22 am

2 stops35h 01m

Lambert-St Louis

Wed 10/29

8:40 pm-9:33 am

1 stop14h 53m

$227

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Sat 11/8

7:30 pm-9:07 am

2 stops35h 37m

Lambert-St Louis

Sat 11/15

7:45 pm-9:33 am

1 stop15h 48m

$229

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Sat 11/8

10:35 am-9:23 pm

2 stops8h 48m

Lambert-St Louis

Sat 11/15

6:00 am-3:57 pm

2 stops11h 57m

$274

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Wed 1/28

7:00 pm-9:44 am

2 stops12h 44m

Lambert-St Louis

Mon 2/2

7:00 am-4:01 pm

2 stops11h 01m

$290

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Thu 12/4

5:50 am-7:10 pm

2 stops11h 20m

Lambert-St Louis

Mon 12/8

6:30 am-3:57 pm

2 stops11h 27m

$306

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Wed 2/25

8:00 am-4:49 pm

1 stop6h 49m

Lambert-St Louis

Tue 3/3

2:55 pm-10:18 pm

1 stop9h 23m

$311

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 $347.

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 $421. 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 $471. 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 $420 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 $463 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 $321 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 October 2025, prices for San Francisco to St. Louis flights are approximately 23% 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

$184

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 $184. The best round-trip flight deal from San Francisco to St. Louis found on momondo in the last 72 hours is $343.
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. 6h 12m 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 $119Free CancellationRating
5.8
3,137 reviews
Search Frontier flights
DeltaPriceFrom $173Free CancellationRating
7.9
7,971 reviews
Search Delta flights
American AirlinesPriceFrom $216Free CancellationRating
7.2
11,046 reviews
Search American Airlines flights
United AirlinesPriceFrom $280Free CancellationRating
7.4
8,970 reviews
Search United Airlines flights
SouthwestPriceFrom $303Free CancellationRating
8.0
4,235 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 $303. Generally, Southwest has 9 flights on this route every week with an average price of $461. 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, 8,970 ratings). United Airlines flies from San Francisco to St. Louis around 7 times per week, with deals starting from $280 round-trip and rising to an average price of around $437.

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
Collinsville
Fenton
St. Peters
Alton
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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