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St. Louis

$87+ Cheap flights from San Francisco to St. Louis (SFO - STL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/11. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — STL
Aug 18 — Aug 251
Mon 8/18
Mon 8/25
1 adult, Economy
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Cheapflights Tip: The best prices from San Francisco to Lambert-St Louis are usually found in January or February, booked 35 days in advance, depart on a Tuesday or Saturday and return on a Thursday

Cheap flight deals from San Francisco to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from San Francisco (SFO) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated August 13, 2025.

Round-trip from

$260
(Expedia)

One-way from

$87
(Southwest)

Popular in

June

Cheapest in

January

Average price

$435

Good round-trip deal

$327 or less

Good one-way deal

$209 or less
From San Francisco to Lambert-St Louis
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One-way flight from San Francisco to Lambert-St Louis
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Highest demand for flights based on searches. 9% potential increase in price ($39 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Price to beat on a round-trip flight from San Francisco to Lambert-St Louis.
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Price to beat on a one-way flight from San Francisco to Lambert-St Louis.
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Find flight deals from San Francisco to St. Louis

Cheapest flights from San Francisco to St. Louis
Explore the most affordable flight options available from San Francisco to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 13, 2025.

This FlightHub deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/176:52 pmSFO - STL
1 stop16h 50mFrontier
Wed 8/207:54 pmSTL - SFO
1 stop17h 35mFrontier
Deal found 8/12$261
This Frontier deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/198:21 pmSFO - STL
1 stop10h 46mFrontier
Thu 10/302:19 pmSTL - SFO
1 stop9h 03mFrontier
Deal found 8/12$262
This Kiwi.com deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/51:15 pmSFO - STL
1 stop17h 51mFrontier
Sun 9/77:55 pmSTL - SFO
1 stop15h 55mFrontier
Deal found 8/12$264
This Frontier deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/57:07 pmSFO - STL
1 stop11h 59mFrontier
Thu 10/910:17 amSTL - SFO
1 stop7h 43mFrontier
Deal found 8/12$265
This FlightHub deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/137:00 amSFO - STL
1 stop28h 42mFrontier
Tue 8/197:54 pmSTL - SFO
1 stop28h 39mFrontier
Deal found 8/12$266
This FlightHub deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/255:45 amSFO - STL
1 stop6h 08mFrontier
Sun 9/287:55 pmSTL - SFO
1 stop19h 22mFrontier
Deal found 8/12$267
This FlightHub deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/185:45 amSFO - STL
1 stop6h 08mFrontier
Fri 9/197:55 pmSTL - SFO
1 stop28h 35mFrontier
Deal found 8/13$268
This Frontier deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1010:17 pmSFO - STL
2 stops8h 50mFrontier
Sat 10/184:51 pmSTL - SFO
1 stop6h 38mFrontier
Deal found 8/12$269
This Kiwi.com deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/17:10 amSFO - STL
1 stop23h 56mFrontier
Sun 10/57:55 pmSTL - SFO
1 stop19h 22mFrontier
Deal found 8/12$270
This FlightHub deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/310:37 pmSFO - STL
1 stop15h 26mFrontier
Sun 10/57:55 pmSTL - SFO
1 stop19h 22mFrontier
Deal found 8/12$271
This FlightHub deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/2610:37 pmSFO - STL
1 stop15h 26mFrontier
Sun 9/287:55 pmSTL - SFO
1 stop19h 22mFrontier
Deal found 8/12$272
This Frontier deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/206:59 pmSFO - STL
2 stops12h 08mFrontier
Mon 10/2712:38 pmSTL - SFO
1 stop11h 15mFrontier
Deal found 8/12$273

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated August 13, 2025.
Use the filters below to find and compare flights from San Francisco to St. Louis that are best for you.

Fly from

San Francisco

Fly to

St. Louis

Route

Depart

Return

Price

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Sun 9/14

7:07 pm-9:06 am

1 stop11h 59m

Lambert-St Louis

Fri 9/19

6:30 pm-12:04 am

1 stop7h 34m

$260

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Fri 10/10

10:17 pm-9:07 am

2 stops8h 50m

Lambert-St Louis

Sat 10/18

4:51 pm-9:29 pm

1 stop6h 38m

$261

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Sun 10/19

8:21 pm-9:07 am

1 stop10h 46m

Lambert-St Louis

Thu 10/30

2:19 pm-9:22 pm

1 stop9h 03m

$262

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Wed 10/22

8:27 am-12:03 am

2 stops13h 36m

Lambert-St Louis

Tue 10/28

7:00 am-3:43 pm

1 stop10h 43m

$263

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Sat 9/6

10:51 am-4:53 pm

Nonstop4h 02m

Lambert-St Louis

Tue 9/9

5:49 pm-8:10 pm

Nonstop4h 21m

$263

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Tue 9/23

6:00 am-5:34 pm

1 stop9h 34m

Lambert-St Louis

Tue 9/30

6:00 am-2:23 pm

2 stops10h 23m

$263

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Fri 9/5

10:37 pm-4:03 pm

1 stop15h 26m

Lambert-St Louis

Sun 9/7

7:55 pm-9:50 am

1 stop15h 55m

$264

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Sun 8/24

6:44 pm-1:46 pm

1 stop17h 02m

Lambert-St Louis

Wed 8/27

7:54 pm-11:29 am

1 stop17h 35m

$264

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Fri 8/22

6:26 am-9:11 am

1 stop24h 45m

Lambert-St Louis

Wed 8/27

7:54 pm-11:29 am

1 stop17h 35m

$264

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Tue 9/30

7:10 am-9:06 am

1 stop23h 56m

Lambert-St Louis

Sun 10/5

7:55 pm-1:17 pm

1 stop19h 22m

$264

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/11

Showing 1-10 of 22 results
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The best insider tips for San Francisco to St. Louis flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your San Francisco to St. Louis trip
Airports
SFO

Save time at SFO by using the AirTrain Red Line to quickly navigate between terminals and security checkpoints.

Read more about SFOby Harriet Baskas
STL

Use the MetroLink light rail for a convenient and economical trip from STL to downtown St. Louis in about 40 minutes.

Read more about STLby Taryn White
Our travel experts
Taryn White

Taryn White

Expert on STL

Taryn White

Taryn White

Taryn White is a freelance travel writer, digital creator, and travel advisor who has visited nearly 100 countries and all 50 states. She’s familiar with many airports and enjoys beach hopping, boutique hotels, spa experiences, and exploring local culture. Her work has appeared in Travel + Leisure, Condé Nast Traveler, National Geographic, Smithsonian Magazine, AFAR, and more.

Read more
Harriet Baskas

Harriet Baskas

Expert on SFO

Harriet Baskas

Harriet Baskas

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more

Best time to book a flight from San Francisco to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from San Francisco with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from San Francisco to St. Louis

How far ahead should I book a flight from San Francisco to St. Louis?

Use this chart to determine the optimal time to book a round-trip flight from San Francisco to St. Louis. Price data was last updated on August 8, 2025.

To ensure you get the cheapest price possible for a flight from San Francisco to St. Louis, you should look to book at least 35 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from San Francisco to St. Louis?

Currently, August is the cheapest month in which you can book a flight from San Francisco to St. Louis (average of $311). Flying from San Francisco to St. Louis in March is currently the most expensive (average of $356). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SFO to STL?

Find hourly flight availability from San Francisco to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 13, 2025.

It’s optimal to fly from San Francisco to St. Louis at noon. By choosing this option you can save up to 12% on the cost of your flight, compared to a flight in the afternoon.

What is the cheapest day to fly from San Francisco to St. Louis?

Use this chart to determine the cheapest time to fly round-trip from San Francisco to St. Louis. Price data was last updated on August 10, 2025.

Travelers seeking maximum savings on their San Francisco to St. Louis flight should consider departing on Tuesday evenings when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Louis. Reviews last updated August 13, 2025.
Read reviews from past customers who have flown Southwest, Delta, and United Airlines from San Francisco to St. Louis. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,244 reviews

Entertainment

7.5

Comfort

8.0

Overall

8.0

Boarding

8.1

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,244 reviews
Southwest
8.0
Very good
4,244 reviews

Entertainment

7.5

Comfort

8.0

Overall

8.0

Boarding

8.1

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Delta
8.0
Very good
7,979 reviews
Southwest
8.0
Very good
4,244 reviews

Entertainment

7.5

Comfort

8.0

Overall

8.0

Boarding

8.1

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
United Airlines
7.4
Good
8,920 reviews
Southwest
8.0
Very good
4,244 reviews

Entertainment

7.5

Comfort

8.0

Overall

8.0

Boarding

8.1

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,244 reviews

Entertainment

7.5

Comfort

8.0

Overall

8.0

Boarding

8.1

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Frontier
5.8
Fair
3,221 reviews
Southwest
8.0
Very good
4,244 reviews

Entertainment

7.5

Comfort

8.0

Overall

8.0

Boarding

8.1

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

Related info for your journey

Find useful and relevant information for your journey from San Francisco to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airports do I use to fly from San Francisco to St. Louis?

    You will need to book a flight from San Francisco to Lambert-St Louis if you want to fly from San Francisco to St. Louis. At least 5 different airlines have flights from San Francisco (SFO) to Lambert-St Louis (STL) on a regular basis. There are 2 flights to St. Louis from the San Francisco airport per day. If you manage to book one that is nonstop, then you can expect the flight time from SFO to STL to be around 3h 45m.

  • How popular is this San Francisco to St. Louis flight route?

    Flights from San Francisco to Lambert-St Louis have been viewed 17 times in the past calendar month.

  • What is the cheapest airline to fly from San Francisco to St. Louis round-trip?

    Currently priced at $261, Frontier will fly you from San Francisco to St. Louis and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Users have found that Frontier is 35% cheaper than the other options available to this destination.

  • What are the most reliable airlines from San Francisco to St. Louis?

    Before booking your flight to St. Louis from San Francisco, check out the most reliable airlines to get you to your destination on time: Southwest (82%), United Airlines (78%), Air New Zealand( 73%).

  • What are the cheapest flights from San Francisco to St. Louis?

    On average you can expect to pay $747 for a flight from San Francisco to St. Louis. The cheapest flight overall is $147 while the most popular route, (San Francisco - Lambert-St Louis) is currently priced at $210.

  • Where are the most common layover locations when flying from San Francisco to St. Louis?

    Flights departing from San Francisco and landing in St. Louis layover in Salt Lake City most frequently.

  • What are some popular things to do or see while on a layover in Salt Lake City?

    If you're on a layover in Salt Lake City and looking for things to do, consider visiting Temple Square, Salt Lake Temple, or Hogle Zoo. Those on a layover in Salt Lake City interested in visiting Temple Square, Salt Lake Temple, or Hogle Zoo can do so by traveling 4.7 mi, 4.8 mi, and 9.1 mi, respectively from Salt Lake City. Those on a layover in Salt Lake City in need of a rental car can book one at Salt Lake City for about $61.

  • Where are the least popular layover locations for San Francisco to St. Louis flights?

    San Francisco to St. Louis flights that have layovers will least frequently stop in Denver.

  • Can I find deals for flights from San Francisco to St. Louis that include hotel bookings?

    Yes. In addition to deals on San Francisco to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from San Francisco to St. Louis?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Francisco to St. Louis.

  • Can I find deals for business class flights from San Francisco to St. Louis?

    Yes. Cheapflights offers flight deals from San Francisco to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from San Francisco to St. Louis?

    Currently, August is the cheapest month in which you can book a flight from San Francisco to St. Louis (average of $311). Flying from San Francisco to St. Louis in March is currently the most expensive (average of $356). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
O'Fallon
Fairview Heights
Maryland Heights
Collinsville
Eureka
St. Peters
Glencoe
Alton
Chesterfield
Farmington
Festus

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Top 5 airlines flying from San Francisco to St. Louis

Discover the top 5 airlines that operate flights from San Francisco to St. Louis. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 13, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$109Average$237FlexibilityNo cancel feeOn-time62%
DeltaCheapest$189Average$365FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$202Average$352FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$297Average$439FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$306Average$444FlexibilityNo cancel feeOn-time63%

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