St. Louis

$78+ 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 10/30. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — STL
Oct 28 — Nov 41
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Find cheap flights from San Francisco to St. Louis with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

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Cheapflights Tip: The best prices from San Francisco to Lambert-St Louis are usually found in January or February, booked 25 days in advance, depart on a Tuesday or Wednesday 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 September 28, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$220
(Frontier)

One-way from

$78
(Cheapflightsfares)

Popular in

June

Cheapest in

January

Average price

$375

Good round-trip deal

$378 or less

Good one-way deal

$184 or less
Provider with most accurate pricing for San Francisco-Lambert-St Louis flight deals.
Provider most trusted by Cheapflights users for San Francisco-Lambert-St Louis flights.
From San Francisco to Lambert-St Louis
One-way flight from San Francisco to Lambert-St Louis
Highest demand for flights based on searches. 8% potential increase in price ($39 potential increase over avg. RT price).
Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
Average for round-trip flights in September 2025
Price to beat on a round-trip flight from San Francisco to Lambert-St Louis.
Price to beat on a one-way flight from San Francisco to Lambert-St Louis.

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 September 28, 2025.

This Frontier deal was found by Cheapflights users on 9/27. 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 10/108:21 pmSFO - STL
1 stop10h 46mFrontier
Sat 10/184:51 pmSTL - SFO
1 stop6h 38mFrontier
Deal found 9/27$220
This Booking.com deal was found by Cheapflights users on 9/27. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1110:23 pmSFO - STL
1 stop10h 14mFrontier
Wed 10/157:52 pmSTL - SFO
1 stop20h 32mFrontier
Deal found 9/27$222
This Frontier deal was found by Cheapflights users on 9/26. 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 10/206:34 amSFO - STL
2 stops12h 30mFrontier
Wed 10/227:52 pmSTL - SFO
2 stops14h 52mFrontier
Deal found 9/26$230
This Kiwi.com deal was found by Cheapflights users on 9/26. 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 10/179:23 pmSFO - STL
2 stops16h 33mFrontier
Tue 10/217:52 pmSTL - SFO
1 stop28h 35mFrontier
Deal found 9/26$235
This Kiwi.com deal was found by Cheapflights users on 9/26. 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.
Thu 11/68:55 pmSFO - STL
1 stop12h 29mFrontier
Mon 11/107:45 pmSTL - SFO
2 stops22h 58mFrontier
Deal found 9/26$238
This Kiwi.com deal was found by Cheapflights users on 9/27. 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.
Mon 10/206:34 amSFO - STL
1 stop24h 33mFrontier
Thu 10/231:41 pmSTL - SFO
2 stops32h 47mFrontier
Deal found 9/27$240
This Kiwi.com deal was found by Cheapflights users on 9/26. 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 11/197:30 amSFO - STL
2 stops33h 28mFrontier
Wed 12/37:43 pmSTL - SFO
1 stop25h 12mFrontier
Deal found 9/26$242
This Booking.com deal was found by Cheapflights users on 9/27. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/210:37 pmSFO - STL
1 stop20h 03mFrontier
Mon 10/67:55 pmSTL - SFO
1 stop28h 32mFrontier
Deal found 9/27$244
This Kiwi.com deal was found by Cheapflights users on 9/26. 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 12/57:53 pmSFO - STL
1 stop12h 09mFrontier
Mon 12/87:43 pmSTL - SFO
2 stops19h 56mFrontier
Deal found 9/26$245

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 September 28, 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

Wed 11/19

10:50 am-4:35 pm

Nonstop3h 45m

Lambert-St Louis

Wed 12/3

5:35 am-9:55 am

1 stop6h 20m

$311

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Tue 11/18

12:30 am-8:55 am

1 stop6h 25m

Lambert-St Louis

Wed 12/3

2:07 pm-8:59 pm

1 stop8h 52m

$321

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Fri 12/5

7:25 pm-2:27 pm

1 stop17h 02m

Lambert-St Louis

Tue 12/9

7:00 am-2:03 pm

1 stop9h 03m

$350

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Wed 11/19

12:59 am-8:56 am

1 stop5h 57m

Lambert-St Louis

Wed 11/26

5:00 am-12:30 pm

1 stop9h 30m

$358

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Fri 11/7

9:25 pm-9:40 am

1 stop10h 15m

Lambert-St Louis

Wed 11/12

11:25 am-1:55 pm

Nonstop4h 30m

$359

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Thu 12/4

10:30 am-8:05 pm

2 stops7h 35m

Lambert-St Louis

Mon 12/8

4:35 pm-10:30 pm

1 stop7h 55m

$364

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Thu 11/6

12:43 am-10:39 am

1 stop7h 56m

Lambert-St Louis

Wed 11/12

1:35 pm-5:50 pm

1 stop6h 15m

$369

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Thu 11/6

8:00 am-11:59 pm

2 stops13h 59m

Lambert-St Louis

Fri 11/7

4:14 pm-10:41 pm

1 stop8h 27m

$391

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Tue 11/25

2:30 pm-11:54 pm

1 stop7h 24m

Lambert-St Louis

Tue 12/9

7:00 am-2:03 pm

1 stop9h 03m

$408

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Tue 10/28

10:35 am-4:27 pm

Nonstop3h 52m

$151

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/28

Showing 1-10 of 19 results
1
2

Compare providers for flights from San Francisco to St. Louis

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from San Francisco to St. Louis in September.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapOairPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on San Francisco-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on San Francisco-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from San Francisco-St. Louis flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on San Francisco-St. Louis flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for San Francisco-St. Louis flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 September 26, 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 25 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 September 28, 2025.

It’s optimal to fly from San Francisco to St. Louis at noon. By choosing this option you can save up to 7% on the cost of your flight, compared to a flight in the evening.

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 September 21, 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 September 28, 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.

Entertainment

7.5

Crew

8.6

Boarding

8.1

Food

7.0

Overall

8.0

Comfort

8.0

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.

Entertainment

7.5

Crew

8.6

Boarding

8.1

Food

7.0

Overall

8.0

Comfort

8.0

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.
8.0
Very good

Entertainment

7.5

Crew

8.6

Boarding

8.1

Food

7.0

Overall

8.0

Comfort

8.0

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.

Entertainment

7.5

Crew

8.6

Boarding

8.1

Food

7.0

Overall

8.0

Comfort

8.0

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.

Entertainment

7.5

Crew

8.6

Boarding

8.1

Food

7.0

Overall

8.0

Comfort

8.0

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.

Entertainment

7.5

Crew

8.6

Boarding

8.1

Food

7.0

Overall

8.0

Comfort

8.0

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 is 1 flight 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 40m.

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

  • How long is the flight from San Francisco to St. Louis?

    Southwest, Delta, and Alaska Airlines can get you from San Francisco to St. Louis in just under 3h 45m. Your travel time can differ by up to 13h 17m. There are 1730 mi between San Francisco and St. Louis. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from San Francisco to St. Louis round-trip?

    Currently priced at $114, 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. Search Cheapflights for deals from Delta and American Airlines - these airlines can fly you to your destination from $189 and $216, respectively. Users have found that Frontier is 71% 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: United Airlines (77%), Southwest (74%), Air New Zealand( 66%).

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

    On average you can expect to pay $323 for a flight from San Francisco to St. Louis. The cheapest flight overall is $132 while the most popular route, (San Francisco - Lambert-St Louis) is currently priced at $222.

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

  • 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 $51.

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

  • 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
Edwardsville
O'Fallon
Fairview Heights
Maryland Heights
Collinsville
Eureka
Glencoe
St. Peters
Chesterfield
Alton
Farmington
Festus

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Alternative routes for San Francisco to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.

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 September 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$112Average$250FlexibilityNo cancel feeOn-time62%
DeltaCheapest$189Average$368FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$216Average$346FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$276Average$432FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$303Average$454FlexibilityNo cancel feeOn-time63%

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