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St. Louis

$146+ 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 8/19. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — STL
Jun 10 — Jun 171
Wed 6/10
Wed 6/17
1 adult, Economy
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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 September or October, booked 22 days in advance, depart on a Thursday or Wednesday and return on a Friday

Cheap 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 May 11, 2026.

This Travelocity deal was found by Cheapflights users on 5/9. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/410:50 pm
SFO
-
STL
1 stop19h 21m
Frontier
Sun 6/142:56 pm
STL
-
SFO
1 stop19h 55m
Frontier
Deal found 5/9$335
This Kiwi.com deal was found by Cheapflights users on 5/9. 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 5/298:44 pm
SFO
-
STL
2 stops10h 11m
Frontier
Mon 6/19:21 pm
STL
-
SFO
1 stop21h 20m
Frontier
Deal found 5/9$336
This Travelocity deal was found by Cheapflights users on 5/7. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/1110:40 pm
SFO
-
STL
1 stop17h 26m
Frontier
Sun 6/142:56 pm
STL
-
SFO
1 stop19h 55m
Frontier
Deal found 5/7$337
This Booking.com deal was found by Cheapflights users on 5/7. 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.
Sun 5/1710:15 pm
SFO
-
STL
1 stop8h 40m
Frontier
Tue 5/196:51 pm
STL
-
SFO
1 stop17h 50m
Frontier
Deal found 5/7$338
This Kiwi.com deal was found by Cheapflights users on 5/10. 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 7/2710:56 pm
SFO
-
STL
2 stops13h 53m
Frontier
Tue 7/288:08 pm
STL
-
SFO
1 stop6h 10m
Frontier
Deal found 5/10$339
This CheapOair deal was found by Cheapflights users on 5/9. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/1810:40 pm
SFO
-
STL
1 stop17h 26m
Frontier
Thu 5/219:06 pm
STL
-
SFO
1 stop24h 43m
Frontier
Deal found 5/9$340
This Gotogate deal was found by Cheapflights users on 5/10. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/2412:38 pm
SFO
-
STL
1 stop28h 15m
Frontier
Wed 7/17:46 pm
STL
-
SFO
1 stop15h 05m
Frontier
Deal found 5/10$341
This Kiwi.com deal was found by Cheapflights users on 5/8. 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.
Sat 7/1110:10 pm
SFO
-
STL
1 stop17h 27m
Frontier
Tue 7/148:08 pm
STL
-
SFO
1 stop6h 10m
Frontier
Deal found 5/8$343
This Kiwi.com deal was found by Cheapflights users on 5/8. 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.
Tue 5/2610:15 pm
SFO
-
STL
2 stops38h 16m
Frontier
Fri 5/298:08 pm
STL
-
SFO
1 stop6h 15m
Frontier
Deal found 5/8$344
This CheapOair deal was found by Cheapflights users on 5/10. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/812:24 am
SFO
-
STL
1 stop12h 25m
Frontier
Sun 7/122:52 pm
STL
-
SFO
1 stop27h 40m
Frontier
Deal found 5/10$345
This Kiwi.com deal was found by Cheapflights users on 5/6. 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 5/288:44 pm
SFO
-
STL
2 stops20h 39m
Frontier
Sun 6/79:06 pm
STL
-
SFO
1 stop19h 20m
Frontier
Deal found 5/6$347
This Kiwi.com deal was found by Cheapflights users on 5/9. 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 6/1010:58 pm
SFO
-
STL
2 stops17h 20m
Frontier
Sat 6/137:38 pm
STL
-
SFO
1 stop6h 49m
Frontier
Deal found 5/9$348

Find 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 May 11, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$335
(Travelocity)

One-way from

$146
(Kiwi.com)

Popular in

March

Cheapest in

September

Average price

$568

Good round-trip deal

$520 or less

Good one-way deal

$264 or less
Provider with most accurate pricing for San Francisco-Lambert-St Louis flight deals.
Search Deals
Provider most trusted by Cheapflights users for San Francisco-Lambert-St Louis flights.
Search Deals
From San Francisco to Lambert-St Louis
Search Deals
One-way flight from San Francisco to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($73 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2026
Search Deals
Price to beat on a round-trip flight from San Francisco to Lambert-St Louis.
Search Deals
Price to beat on a one-way flight from San Francisco to Lambert-St Louis.
Search Deals

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 May 11, 2026.
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

Cheapest round-trip

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Mon 8/24

12:25 pm-6:24 pm

Nonstop3h 59m

Lambert-St Louis

Sun 9/6

8:52 am-11:14 am

Nonstop4h 22m

$448

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Wed 7/1

3:10 pm-11:40 pm

1 stop6h 30m

Lambert-St Louis

Sat 7/4

2:20 pm-4:30 pm

Nonstop4h 10m

$491
Quickest round-trip

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Mon 9/21

12:00 pm-5:50 pm

Nonstop3h 50m

Lambert-St Louis

Wed 9/30

8:25 am-10:35 am

Nonstop4h 10m

$515

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Wed 9/2

11:50 am-5:40 pm

Nonstop3h 50m

Lambert-St Louis

Mon 9/7

6:25 am-10:25 am

1 stop6h 00m

$522

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Wed 9/2

11:50 am-5:40 pm

Nonstop3h 50m

Lambert-St Louis

Sun 9/6

1:25 pm-6:50 pm

1 stop7h 25m

$526

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Thu 6/11

12:12 pm-6:17 pm

Nonstop4h 05m

Lambert-St Louis

Sun 6/14

7:23 pm-9:43 pm

Nonstop4h 20m

$539

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Fri 7/10

12:12 pm-6:17 pm

Nonstop4h 05m

Lambert-St Louis

Tue 7/14

7:23 pm-9:43 pm

Nonstop4h 20m

$541

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Tue 8/18

11:52 am-11:42 pm

2 stops9h 50m

Lambert-St Louis

Wed 8/19

3:00 pm-9:27 pm

1 stop8h 27m

$548

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Thu 9/3

6:00 am-5:55 pm

2 stops9h 55m

Lambert-St Louis

Mon 9/7

2:20 pm-10:55 pm

2 stops10h 35m

$565

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Mon 8/17

10:08 pm-4:37 pm

1 stop16h 29m

Lambert-St Louis

Sat 8/22

6:00 am-4:31 pm

2 stops12h 31m

$566

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/7

Showing 1-10 of 24 resultsSorted by cheapest first
1
2
3

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 May.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy2 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
JustAirTicketPrice Accuracy-Trust Score*1 star
CheapOairPrice Accuracy3 starsTrust Score*3 stars

*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.

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?

To ensure you get the cheapest price possible for a flight from San Francisco to St. Louis, you should look to book at least 21 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, September is the cheapest month in which you can book a flight from San Francisco to St. Louis (average of $398). Flying from San Francisco to St. Louis in March is currently the most expensive (average of $635). 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 May 11, 2026.

It’s optimal to fly from San Francisco to St. Louis at noon. By choosing this option you can save up to 55% on the cost of your flight, compared to a flight in the afternoon.

How much does it cost to fly round-trip from San Francisco to St. Louis?

The best insider tips for San Francisco to St. Louis flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your San Francisco to St. Louis trip
Our travel experts
Taryn White

Taryn White

Expert on STL

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 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

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 May 11, 2026.
Read reviews from past customers who have flown Southwest,Delta, andUnited 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
4,298 reviews

Boarding

8.1

Food

7.0

Overall

8.0

Crew

8.6

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
Southwest
8.0
Very good
4,298 reviews
Southwest
8.0
Very good
4,298 reviews

Boarding

8.1

Food

7.0

Overall

8.0

Crew

8.6

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
Delta
7.9
Good
8,451 reviews
Southwest
8.0
Very good
4,298 reviews

Boarding

8.1

Food

7.0

Overall

8.0

Crew

8.6

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
United Airlines
7.4
Good
9,699 reviews
Southwest
8.0
Very good
4,298 reviews

Boarding

8.1

Food

7.0

Overall

8.0

Crew

8.6

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
American Airlines
7.1
Good
11,667 reviews
Southwest
8.0
Very good
4,298 reviews

Boarding

8.1

Food

7.0

Overall

8.0

Crew

8.6

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
Frontier
5.6
Fair
2,954 reviews
Southwest
8.0
Very good
4,298 reviews

Boarding

8.1

Food

7.0

Overall

8.0

Crew

8.6

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.

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 5 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 50m.

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

    Flights from San Francisco to Lambert-St Louis have been viewed 11 times in the past calendar month.

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

    United Airlines and Southwest can get you from San Francisco to St. Louis in just under 3h 59m. Your travel time can differ by up to 2h 31m. 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 $145, 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 $202, respectively. Users have found that Frontier is 71% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from San Francisco to St. Louis one-way?

    One-way options have recently been found by users for as low as $91 on American Airlines. Other airlines that offer cheap prices include Frontier from $93 and Delta from $128 one-way.

  • 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: SkyWest Airlines (81%), United Airlines (81%), Emirates( 80%).

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

    On average you can expect to pay $461 for a flight from San Francisco to St. Louis. The cheapest flight overall is $203 while the most popular route, (San Francisco - Lambert-St Louis) is currently priced at $294.

  • 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, September is the cheapest month in which you can book a flight from San Francisco to St. Louis (average of $398). Flying from San Francisco to St. Louis in March is currently the most expensive (average of $635). 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
Fenton
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Wentzville
Glencoe
Chesterfield
Alton
Farmington
Festus

Browse thousands of different options on Cheapflights for your next trip

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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 May 11, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$145Average$300FlexibilityNo cancel feeOn-time62%
DeltaCheapest$189Average$390FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$202Average$466FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$292Average$545FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$327Average$557FlexibilityNo cancel feeOn-time63%

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