St. Louis

$160+ 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 5/31. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — STL
Mai 4 — Mai 111
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1. Tell us where you want to go

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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 Wednesday 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 April 29, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$323
(Trip.com)

One-way from

$160
(United Airlines)

Popular in

June

Cheapest in

January

Average price

$373

Good round-trip deal

$376 or less

Good one-way deal

$196 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. 6% potential increase in price ($26 potential increase over avg. RT price).
Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
Average for round-trip flights in April 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 April 29, 2025.

This Frontier deal was found by Cheapflights users on 4/27. 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.
Do 5/16:20 amSFO - STL
1 stop6h 47mFrontier
Do 5/19:55 pmSTL - SFO
1 stop11h 49mFrontier
Deal found 4/27$320
This United Airlines deal was found by Cheapflights users on 4/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Di 5/275:05 amSFO - STL
1 stop7h 48mUnited Airlines
Di 6/36:10 amSTL - SFO
Nonstop4h 16mUnited Airlines
Deal found 4/28$333
This Sun Country Air deal was found by Cheapflights users on 4/28. 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.
Do 7/311:59 pmSFO - STL
1 stop9h 31mSun Country Air
So 7/206:05 amSTL - SFO
1 stop28h 03mSun Country Air
Deal found 4/28$335
This Delta deal was found by Cheapflights users on 4/28. 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.
Mi 5/285:55 amSFO - STL
1 stop5h 39mDelta
Mi 5/286:05 pmSTL - SFO
1 stop7h 46mDelta
Deal found 4/28$339
This Expedia deal was found by Cheapflights users on 4/28. 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.
Do 6/58:00 amSFO - STL
2 stops14h 04mMultiple Airlines
Sa 6/78:11 pmSTL - SFO
1 stop6h 18mMultiple Airlines
Deal found 4/28$346
This Southwest deal was found by Cheapflights users on 4/29. 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.
Do 5/298:00 amSFO - STL
1 stop6h 20mSouthwest
Fr 5/304:50 pmSTL - SFO
Nonstop4h 20mSouthwest
Deal found 4/29$362
This Hawaiian Airlines deal was found by Cheapflights users on 4/28. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sa 9/62:39 pmSFO - STL
1 stop7h 20mHawaiian Airlines
Di 9/93:35 pmSTL - SFO
1 stop7h 45mHawaiian Airlines
Deal found 4/28$363
This Alaska Airlines deal was found by Cheapflights users on 4/28. 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.
Do 10/28:00 amSFO - STL
1 stop13h 59mAlaska Airlines
Di 10/72:55 pmSTL - SFO
1 stop9h 23mAlaska Airlines
Deal found 4/28$374
This American Airlines deal was found by Cheapflights users on 4/29. 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.
So 5/2512:24 amSFO - STL
1 stop6h 35mAmerican Airlines
Mo 6/27:19 pmSTL - SFO
1 stop7h 03mAmerican Airlines
Deal found 4/29$385

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 April 29, 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

Mo 5/19

1:39 pm-11:44 pm

2 stops32h 05m

Lambert-St Louis

Mo 5/26

2:25 pm-12:24 pm

1 stop23h 59m

$323

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Di 5/27

5:05 am-2:53 pm

1 stop7h 48m

Lambert-St Louis

Di 6/3

6:10 am-8:26 am

Nonstop4h 16m

$333

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Do 7/3

11:59 pm-11:30 am

1 stop9h 31m

Lambert-St Louis

So 7/20

6:05 am-8:08 am

1 stop28h 03m

$335

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Mi 5/28

5:55 am-1:34 pm

1 stop5h 39m

Lambert-St Louis

Mi 5/28

6:05 pm-11:51 pm

1 stop7h 46m

$339

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Do 6/5

8:00 am-12:04 am

2 stops14h 04m

Lambert-St Louis

Sa 6/7

8:11 pm-12:29 am

1 stop6h 18m

$346

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Do 5/29

8:00 am-4:20 pm

1 stop6h 20m

Lambert-St Louis

Fr 5/30

4:50 pm-7:10 pm

Nonstop4h 20m

$362

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

So 5/25

12:24 am-8:59 am

1 stop6h 35m

Lambert-St Louis

Mo 6/2

7:19 pm-12:22 am

1 stop7h 03m

$385

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Di 6/3

10:39 am-12:04 am

2 stops11h 25m

Lambert-St Louis

Mi 6/11

6:18 pm-9:11 am

1 stop16h 53m

$398

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Sa 5/31

11:55 am-6:00 pm

Nonstop4h 05m

$160

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Do 5/29

6:10 am-6:24 pm

2 stops10h 14m

$163

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

Showing 1-10 of 15 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 April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy2 starsTrust Score*3 stars
CheapOairPrice Accuracy3 starsTrust Score*3 stars
MytripPrice Accuracy3 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust 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 CheapOair to be most consistent on Cheapflights vs. CheapOair Users can find the same prices on San Francisco-St. Louis flight deals on Cheapflights vs. CheapOair >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 CheapOair the most. CheapOair 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 April 25, 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 April 29, 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 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 March 30, 2025.

Travelers seeking maximum savings on their San Francisco to St. Louis flight should consider departing on Monday 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 April 29, 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.

Crew

8.5

Boarding

8.2

Entertainment

7.1

Overall

8.0

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Crew

8.5

Boarding

8.2

Entertainment

7.1

Overall

8.0

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Crew

8.5

Boarding

8.2

Entertainment

7.1

Overall

8.0

Food

7.1

Comfort

7.9

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

Crew

8.5

Boarding

8.2

Entertainment

7.1

Overall

8.0

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Crew

8.5

Boarding

8.2

Entertainment

7.1

Overall

8.0

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Crew

8.5

Boarding

8.2

Entertainment

7.1

Overall

8.0

Food

7.1

Comfort

7.9

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 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 50m.

  • 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 $323, 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 United Airlines and Sun Country Air - these airlines can fly you to your destination from $333 and $335, respectively. Users have found that Frontier is 17% 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 $160 on United Airlines. Other airlines that offer cheap prices include Frontier from $161 and Delta from $163 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 (78%), United Airlines (77%), Air New Zealand( 77%).

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

    On average you can expect to pay $729 for a flight from San Francisco to St. Louis. The cheapest flight overall is $144 while the most popular route, (San Francisco - Lambert-St Louis) is currently priced at $234.

  • 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, Abravanel Hall, or Salt Lake Temple. Those on a layover in Salt Lake City interested in visiting Temple Square, Abravanel Hall, or Salt Lake Temple can do so by traveling 4.7 mi, 4.7 mi, and 4.8 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 $50.

  • 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
Fenton
Maryland Heights
Fairview Heights
Collinsville
Wentzville
Eureka
St. Peters
Festus
Glencoe
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 April 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$109Average$196FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$253Average$360FlexibilityNo cancel feeOn-time71%
DeltaCheapest$256Average$376FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$279Average$433FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$303Average$429FlexibilityNo cancel feeOn-time63%

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