St. Louis

$60+ 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 4/18. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — STL
Mrz 13 — Mrz 201
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Cheapflights Tip: The best prices from San Francisco to Lambert-St Louis are usually found in September or October, booked 79 days in advance, depart on a Tuesday or Saturday and return on a Thursday

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 Februar 11, 2026.

This Priceline deal was found by Cheapflights users on 2/9. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mo 3/29:03 am
SFO
-
STL
1 stop10h 10m
Frontier
Mi 3/118:12 pm
STL
-
SFO
1 stop6h 16m
Frontier
Deal found 2/9$179
This Frontier deal was found by Cheapflights users on 2/9. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mi 2/257:20 am
SFO
-
STL
1 stop6h 33m
Frontier
Sa 2/282:51 pm
STL
-
SFO
1 stop11h 37m
Frontier
Deal found 2/9$190
This Kiwi.com deal was found by Cheapflights users on 2/8. 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.
Fr 3/69:04 pm
SFO
-
STL
1 stop10h 45m
Frontier
Mo 3/92:09 pm
STL
-
SFO
2 stops32h 00m
Frontier
Deal found 2/8$209
This Expedia deal was found by Cheapflights users on 2/8. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fr 5/19:33 pm
SFO
-
STL
1 stop15h 48m
Frontier
Mo 5/49:55 pm
STL
-
SFO
1 stop18h 31m
Frontier
Deal found 2/8$211
This Frontier deal was found by Cheapflights users on 2/9. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Do 3/1210:40 pm
SFO
-
STL
1 stop12h 54m
Frontier
Mi 3/1811:32 am
STL
-
SFO
1 stop9h 42m
Frontier
Deal found 2/9$214
This Priceline deal was found by Cheapflights users on 2/9. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Do 3/510:40 pm
SFO
-
STL
1 stop11h 09m
Frontier
Sa 3/78:12 pm
STL
-
SFO
1 stop6h 16m
Frontier
Deal found 2/9$218
This Kiwi.com deal was found by Cheapflights users on 2/10. 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.
Sa 3/77:25 pm
SFO
-
STL
1 stop23h 37m
Frontier
Mi 3/1811:32 am
STL
-
SFO
1 stop9h 42m
Frontier
Deal found 2/10$222
This Frontier deal was found by Cheapflights users on 2/11. 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.
Mo 3/29:03 am
SFO
-
STL
1 stop10h 10m
Frontier
Do 3/510:11 pm
STL
-
SFO
1 stop11h 47m
Frontier
Deal found 2/11$225
This Kiwi.com deal was found by Cheapflights users on 2/10. 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.
Di 3/37:15 pm
SFO
-
STL
2 stops18h 38m
Frontier
Di 3/178:06 pm
STL
-
SFO
1 stop24h 31m
Frontier
Deal found 2/10$226

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 Februar 11, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$169
(Frontier)

One-way from

$60
(Trip.com)

Popular in

December

Cheapest in

September

Average price

$513

Good round-trip deal

$416 or less

Good one-way deal

$234 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. 11% potential increase in price ($60 potential increase over avg. RT price).
Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
Average for round-trip flights in February 2026
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.

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 Februar 11, 2026.
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

Mi 3/11

8:09 pm-11:19 am

2 stops37h 10m

Lambert-St Louis

Mi 3/18

11:32 am-7:14 pm

1 stop9h 42m

$238

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Fr 5/15

6:00 am-7:12 pm

1 stop11h 12m

Lambert-St Louis

Mo 5/18

3:02 pm-12:22 am

2 stops11h 20m

$277

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Fr 5/1

6:00 am-7:12 pm

1 stop11h 12m

Lambert-St Louis

So 5/3

8:12 pm-12:52 pm

2 stops18h 40m

$300

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Sa 5/2

12:26 pm-11:59 pm

1 stop9h 33m

Lambert-St Louis

Di 5/5

7:00 am-2:21 pm

1 stop9h 21m

$347

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Sa 3/7

10:20 am-11:23 pm

2 stops11h 03m

Lambert-St Louis

Di 3/10

6:29 am-2:04 pm

2 stops9h 35m

$355

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Do 4/9

6:00 am-5:07 pm

2 stops9h 07m

Lambert-St Louis

Sa 4/11

12:28 pm-6:05 pm

1 stop7h 37m

$366

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Mi 3/11

4:17 pm-10:25 pm

Nonstop4h 08m

Lambert-St Louis

Mi 3/18

7:00 pm-12:16 am

1 stop7h 16m

$367

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Di 4/7

11:13 am-11:59 pm

1 stop10h 46m

Lambert-St Louis

Di 4/14

3:50 pm-10:27 pm

1 stop8h 37m

$370

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Sa 5/16

6:00 am-4:49 pm

1 stop8h 49m

Lambert-St Louis

Di 5/19

2:27 pm-12:01 am

2 stops11h 34m

$376

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Sa 5/16

10:38 pm-10:30 am

1 stop9h 52m

$94

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/11

Showing 1-10 of 20 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 February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust 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
CheapfaremartPrice Accuracy-Trust Score*1 star
JustAirTicketPrice 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.

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 February 6, 2026.

To ensure you get the cheapest price possible for a flight from San Francisco to St. Louis, you should look to book at least 79 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, February is the cheapest month in which you can book a flight from San Francisco to St. Louis (average of $91). Flying from San Francisco to St. Louis in June is currently the most expensive (average of $265). 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 Februar 11, 2026.

It’s optimal to fly from San Francisco to St. Louis at noon. By choosing this option you can save up to 25% on the cost of your flight, compared to a flight in the afternoon.

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.

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.

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 Februar 11, 2026.
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.

Overall

8.0

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Crew

8.6

Food

7.0

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.

Overall

8.0

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Crew

8.6

Food

7.0

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.

Overall

8.0

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Crew

8.6

Food

7.0

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.

Overall

8.0

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Crew

8.6

Food

7.0

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.

Overall

8.0

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Crew

8.6

Food

7.0

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.

Overall

8.0

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Crew

8.6

Food

7.0

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 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 45m.

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

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

    Frontier, Delta, and Alaska Airlines can get you from San Francisco to St. Louis in just under 9h 07m. Your travel time can differ by up to 28h 03m. 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 $130, 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 Frontier. Other airlines that offer cheap prices include American Airlines from $91 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: Air New Zealand (81%), United Airlines (78%), SkyWest Airlines( 75%).

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

    On average you can expect to pay $710 for a flight from San Francisco to St. Louis. The cheapest flight overall is $175 while the most popular route, (San Francisco - Lambert-St Louis) is currently priced at $219.

  • 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, February is the cheapest month in which you can book a flight from San Francisco to St. Louis (average of $91). Flying from San Francisco to St. Louis in June is currently the most expensive (average of $265). 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
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Glencoe
Chesterfield
Alton
Farmington
Festus

Browse thousands of different options on Cheapflights for your next trip

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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 Februar 11, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$130Average$269FlexibilityNo cancel feeOn-time62%
DeltaCheapest$189Average$378FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$202Average$385FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$292Average$473FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$325Average$508FlexibilityNo cancel feeOn-time63%

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