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Cheap flights from San Francisco Bay Area to St. Louis from $108

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 Bay Area to St. Louis departing on 10/25. 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 Bay Area to St. Louis

Cheap round-trip flights

Frontier Logo
1:25 pm - 6:02 pmSFO-STL
26h 37m1 stop
Frontier Logo
3:02 pm - 9:03 pmSTL-SFO
8h 01m1 stop
$217Frontier
Find Deal
Sat, Aug 23 - Sat, Aug 30
Frontier Logo
11:00 pm - 3:04 pmSFO-STL
14h 04m1 stop
Frontier Logo
4:58 pm - 9:21 pmSTL-SFO
6h 23m1 stop
$218Frontier
Find Deal
Sat, Sep 13 - Sat, Sep 20
American Airlines Logo
12:47 am - 1:31 pmSFO-STL
10h 44m1 stop
American Airlines Logo
8:42 am - 5:59 pmSTL-SFO
11h 17m1 stop
$277American Airlines
Find Deal
Tue, Sep 30 - Wed, Oct 8
United Airlines Logo
10:51 am - 4:53 pmSFO-STL
4h 02mnonstop
United Airlines Logo
5:49 pm - 8:10 pmSTL-SFO
4h 21mnonstop
$293United Airlines
Find Deal
Wed, Aug 27 - Wed, Sep 3
Delta Logo
7:15 am - 6:35 pmSJC-STL
9h 20m2 stops
Delta Logo
12:14 pm - 10:08 pmSTL-SJC
11h 54m2 stops
$294Delta
Find Deal
Wed, Oct 29 - Tue, Nov 4
United Airlines Logo
10:51 am - 4:53 pmSFO-STL
4h 02mnonstop
United Airlines Logo
5:49 pm - 8:10 pmSTL-SFO
4h 21mnonstop
$296United Airlines
Find Deal
Wed, Aug 27 - Sat, Aug 30
Southwest Logo
1:45 pm - 7:35 pmSFO-STL
3h 50mnonstop
Southwest Logo
9:40 am - 11:50 amSTL-SFO
4h 10mnonstop
$298Southwest
Find Deal
Tue, Aug 19 - Sat, Aug 23
Delta Logo
11:35 am - 12:24 amSJC-STL
10h 49m2 stops
Delta Logo
3:59 pm - 10:58 pmSTL-SJC
8h 59m1 stop
$303Delta
Find Deal
Wed, Oct 29 - Tue, Nov 4
Southwest Logo
6:50 am - 5:10 pmSFO-STL
8h 20m1 stop
Southwest Logo
9:10 am - 11:20 amSTL-SFO
4h 10mnonstop
$308Southwest
Find Deal
Sat, Aug 23 - Wed, Aug 27
American Airlines Logo
11:59 pm - 9:54 amSFO-STL
7h 55m1 stop
American Airlines Logo
5:58 am - 2:40 pmSTL-SFO
10h 42m1 stop
$310American Airlines
Find Deal
Wed, Nov 26 - Wed, Dec 3

Frontier flights from San Francisco Bay Area to St. Louis

Our best Frontier deals on San Francisco Bay Area to St. Louis flight tickets
Frontier
Aug 23
SFO1:25 pmSan Francisco
26h 37m
1 stop
STL6:02 pmLambert-St Louis
Aug 30
STL3:02 pmLambert-St Louis
8h 01m
1 stop
SFO9:03 pmSan Francisco
$217
Find similar
Frontier
Sep 13
SFO11:00 pmSan Francisco
14h 04m
1 stop
STL3:04 pmLambert-St Louis
Sep 20
STL4:58 pmLambert-St Louis
6h 23m
1 stop
SFO9:21 pmSan Francisco
$218
Find similar
Frontier
Aug 13
SFO7:00 amSan Francisco
28h 42m
1 stop
STL1:42 pmLambert-St Louis
Aug 16
STL2:52 pmLambert-St Louis
8h 36m
1 stop
SFO9:28 pmSan Francisco
$225
Find similar

Alaska Airlines flights from San Francisco Bay Area to St. Louis

Our best Alaska Airlines deals on San Francisco Bay Area to St. Louis flight tickets
Alaska Airlines
Sep 3
SFO8:00 amSan Francisco
7h 34m
1 stop
STL5:34 pmLambert-St Louis
Sep 9
STL3:35 pmLambert-St Louis
7h 45m
1 stop
SFO9:20 pmSan Francisco
$312
Find similar
Alaska Airlines
Nov 12
OAK2:49 pmOakland
22h 29m
1 stop
STL3:18 pmLambert-St Louis
Nov 15
STL7:00 amLambert-St Louis
8h 55m
1 stop
OAK1:55 pmOakland
$315
Find similar
Alaska Airlines
Sep 18
SJC8:00 amSan Jose
7h 34m
1 stop
STL5:34 pmLambert-St Louis
Sep 30
STL3:35 pmLambert-St Louis
19h 18m
2 stops
SJC8:53 amSan Jose
$326
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from San Francisco Bay Area 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 July 31, 2025.
Use the filters below to find and compare flights from San Francisco Bay Area to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Sat 8/23

1:25 pm-6:02 pm

1 stop26h 37m

Lambert-St Louis

Sat 8/30

3:02 pm-9:03 pm

1 stop8h 01m

$217

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Sat 9/13

11:00 pm-3:04 pm

1 stop14h 04m

Lambert-St Louis

Sat 9/20

4:58 pm-9:21 pm

1 stop6h 23m

$218

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Tue 9/30

12:47 am-1:31 pm

1 stop10h 44m

Lambert-St Louis

Wed 10/8

8:42 am-5:59 pm

1 stop11h 17m

$277

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Wed 8/27

10:51 am-4:53 pm

Nonstop4h 02m

Lambert-St Louis

Wed 9/3

5:49 pm-8:10 pm

Nonstop4h 21m

$293

San JoseSt. Louis

SJC - STL

SJCSTL

San Jose

Wed 10/29

7:15 am-6:35 pm

2 stops9h 20m

Lambert-St Louis

Tue 11/4

12:14 pm-10:08 pm

2 stops11h 54m

$294

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Wed 8/27

10:51 am-4:53 pm

Nonstop4h 02m

Lambert-St Louis

Sat 8/30

5:49 pm-8:10 pm

Nonstop4h 21m

$296

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Tue 8/19

1:45 pm-7:35 pm

Nonstop3h 50m

Lambert-St Louis

Sat 8/23

9:40 am-11:50 am

Nonstop4h 10m

$298

San JoseSt. Louis

SJC - STL

SJCSTL

San Jose

Wed 10/29

11:35 am-12:24 am

2 stops10h 49m

Lambert-St Louis

Tue 11/4

3:59 pm-10:58 pm

1 stop8h 59m

$303

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Sat 8/23

6:50 am-5:10 pm

1 stop8h 20m

Lambert-St Louis

Wed 8/27

9:10 am-11:20 am

Nonstop4h 10m

$308

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Wed 11/26

11:59 pm-9:54 am

1 stop7h 55m

Lambert-St Louis

Wed 12/3

5:58 am-2:40 pm

1 stop10h 42m

$310

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 Bay Area 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 Bay Area 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 Bay Area 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 $420. 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 Bay Area at noon is the least expensive time of day to depart. momondo users have found prices as low as $403 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 Bay Area to Lambert-St Louis flight route?

Fly from San Francisco to Lambert-St Louis for the best San Francisco Bay Area - 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 Bay Area when booking weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $400 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 Bay Area for as low as $340 on momondo.

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

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

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

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

    Prices for flights from San Francisco Bay Area to Lambert-St Louis Airport were last updated today.

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

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

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

    The travel and health documents required for your trip to Lambert-St Louis Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Lambert-St Louis Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from San Francisco Bay Area to St. Louis?

Best airlines flying from San Francisco Bay Area to St. Louis

Compare and see reviews for airlines that fly from San Francisco Bay Area to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $108Free CancellationRating
5.9
3,239 reviews
Search Frontier flights
American AirlinesPriceFrom $202Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $246Free CancellationRating
8.0
7,981 reviews
Search Delta flights
United AirlinesPriceFrom $246Free CancellationRating
7.4
8,900 reviews
Search United Airlines flights
SouthwestPriceFrom $305Free CancellationRating
8.0
4,246 reviews
Search Southwest flights
Alaska AirlinesPriceFrom $432Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights

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
Fenton
Collinsville
O'Fallon
Alton
St. Peters
Farmington
Wentzville
Festus
Glencoe
Eureka
Edwardsville
Clayton
Shrewsbury
Grafton

Why use momondo?

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

It is quick and easy to find San Francisco Bay Area to St. Louis flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to St. Louis that suits you.

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

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

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

Once you have performed a search for San Francisco Bay Area to St. Louis flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

If you are simply researching potential flights to St. Louis, momondo offers a useful price alert feature which will track prices for flights to St. Louis from San Francisco Bay Area and alert you when they change.

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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