St. Louis

$138+ 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 8/6. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — STL
Jun 17 — Jun 241
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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 Saturday or Tuesday 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 June 12, 2025.

Round-trip from

$283
(Cheapflightsfares)

One-way from

$138
(American Airlines)

Popular in

June

Cheapest in

January

Average price

$489

Good round-trip deal

$400 or less

Good one-way deal

$200 or less
From San Francisco to Lambert-St Louis
One-way flight from San Francisco to Lambert-St Louis
Highest demand for flights based on searches. 9% potential increase in price ($44 potential increase over avg. RT price).
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
Average for round-trip flights in June 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 June 12, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 6/11. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/45:45 amSFO - STL
1 stop5h 49mFrontier
Sun 9/77:52 pmSTL - SFO
1 stop6h 22mFrontier
Deal found 6/11$283
This Southwest deal was found by Cheapflights users on 6/12. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/411:25 amSFO - STL
Nonstop3h 55mSouthwest
Mon 9/296:00 pmSTL - SFO
1 stop7h 20mSouthwest
Deal found 6/12$287
This KAYAK deal was found by Cheapflights users on 6/11. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/610:45 amSFO - STL
Nonstop4h 00mUnited Airlines
Thu 10/95:47 pmSTL - SFO
Nonstop4h 21mUnited Airlines
Deal found 6/11$289
This American Airlines deal was found by Cheapflights users on 6/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/66:10 amSFO - STL
1 stop10h 13mAmerican Airlines
Sat 8/96:00 amSTL - SFO
1 stop7h 04mAmerican Airlines
Deal found 6/10$294
This Delta deal was found by Cheapflights users on 6/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2912:40 amSFO - STL
1 stop8h 52mDelta
Tue 10/73:30 pmSTL - SFO
1 stop7h 07mDelta
Deal found 6/11$297
This Alaska Airlines deal was found by Cheapflights users on 6/11. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/309:17 pmSFO - STL
2 stops18h 17mAlaska Airlines
Tue 10/73:57 pmSTL - SFO
1 stop8h 32mAlaska Airlines
Deal found 6/11$336
This CheapOair deal was found by Cheapflights users on 6/10. 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.
Sat 7/126:14 pmSFO - STL
1 stop23h 17mMultiple Airlines
Sat 7/192:52 pmSTL - SFO
1 stop8h 36mMultiple Airlines
Deal found 6/10$372
This Sun Country Air deal was found by Cheapflights users on 6/12. 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 Sun Country Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/2611:59 pmSFO - STL
1 stop9h 37mSun Country Air
Sun 6/296:12 amSTL - SFO
1 stop27h 56mSun Country Air
Deal found 6/12$405

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 June 12, 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

Fri 9/5

8:04 pm-9:07 am

1 stop11h 03m

Lambert-St Louis

Sun 9/7

7:52 pm-12:14 am

1 stop6h 22m

$281

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Thu 9/4

11:25 am-5:20 pm

Nonstop3h 55m

Lambert-St Louis

Mon 9/29

6:00 pm-11:20 pm

1 stop7h 20m

$287

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Wed 8/6

6:10 am-6:23 pm

1 stop10h 13m

Lambert-St Louis

Sat 8/9

6:00 am-11:04 am

1 stop7h 04m

$294

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Mon 8/4

12:50 am-8:34 am

1 stop5h 44m

Lambert-St Louis

Tue 8/12

1:26 pm-8:25 pm

1 stop8h 59m

$297

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Fri 9/5

7:00 am-5:34 pm

1 stop8h 34m

Lambert-St Louis

Tue 9/16

3:35 pm-9:20 pm

1 stop7h 45m

$345

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Sat 9/6

10:51 am-4:53 pm

Nonstop4h 02m

Lambert-St Louis

Sun 9/14

5:49 pm-8:10 pm

Nonstop4h 21m

$369

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Sat 7/12

6:14 pm-7:31 pm

1 stop23h 17m

Lambert-St Louis

Sat 7/19

2:52 pm-9:28 pm

1 stop8h 36m

$372

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Thu 6/26

11:59 pm-11:36 am

1 stop9h 37m

Lambert-St Louis

Sun 6/29

6:12 am-8:08 am

1 stop27h 56m

$405

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Wed 8/6

6:10 am-6:23 pm

1 stop10h 13m

$138

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Tue 8/19

10:51 am-4:53 pm

Nonstop4h 02m

$139

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

Showing 1-10 of 16 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 June 9, 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 June 12, 2025.

It’s optimal to fly from San Francisco to St. Louis at noon. By choosing this option you can save up to 9% 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 June 8, 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. Tuesday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

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 June 12, 2025.
To help decide which airline to fly from San Francisco to St. Louis, see what other customers have to say about Alaska Airlines, Southwest and Delta. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Overall

8.0

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Overall

8.0

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Overall

8.0

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
8.0
Very good

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Overall

8.0

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Overall

8.0

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Overall

8.0

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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 40m.

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

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

    Currently priced at $283, 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 Southwest and United Airlines - these airlines can fly you to your destination from $287 and $289, respectively. Users have found that Frontier is 28% 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 $138 on American Airlines. Other airlines that offer cheap prices include United Airlines from $139 and Sun Country Air from $143 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: Asiana Airlines (83%), Air New Zealand (70%), United Airlines( 61%).

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

    On average you can expect to pay $663 for a flight from San Francisco to St. Louis. The cheapest flight overall is $105 while the most popular route, (San Francisco - Lambert-St Louis) is currently priced at $265.

  • 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 $55.

  • 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 San Francisco?

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

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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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$108Average$194FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$246Average$356FlexibilityNo cancel feeOn-time71%
DeltaCheapest$256Average$367FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$290Average$437FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$310Average$443FlexibilityNo cancel feeOn-time63%

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