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$58+ Cheap flights from St. Louis to San Francisco (STL - SFO)

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 2/28. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SFO
Feb 20 — Feb 271
Fri 2/20
Fri 2/27
1 adult, Economy
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Cheapflights Tip: The best prices from Lambert-St Louis to San Francisco are usually found in April or October, booked 76 days in advance, depart on a Thursday or Wednesday and return on a Tuesday

Cheap flight deals from St. Louis to San Francisco

Cheapest flights from St. Louis to San Francisco
Explore the most affordable flight options available from St. Louis to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 21, 2026.

This Kiwi.com deal was found by Cheapflights users on 1/19. 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 2/282:51 pm
STL
-
SFO
1 stop11h 37m
Frontier
Mon 3/24:03 pm
SFO
-
STL
2 stops36h 48m
Frontier
Deal found 1/19$171
This Frontier deal was found by Cheapflights users on 1/19. 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.
Tue 4/711:21 am
STL
-
SFO
1 stop9h 53m
Frontier
Sat 4/1110:23 pm
SFO
-
STL
1 stop10h 07m
Frontier
Deal found 1/19$180
This Kiwi.com deal was found by Cheapflights users on 1/21. 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 2/1310:11 pm
STL
-
SFO
1 stop14h 39m
Frontier
Wed 2/186:55 am
SFO
-
STL
1 stop6h 58m
Frontier
Deal found 1/21$184
This Kiwi.com deal was found by Cheapflights users on 1/20. 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 2/2710:11 pm
STL
-
SFO
2 stops21h 47m
Frontier
Mon 3/29:03 am
SFO
-
STL
1 stop10h 10m
Frontier
Deal found 1/20$187
This Kiwi.com deal was found by Cheapflights users on 1/20. 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 2/184:51 pm
STL
-
SFO
1 stop17h 12m
Frontier
Tue 3/38:25 am
SFO
-
STL
1 stop29h 28m
Frontier
Deal found 1/20$190
This Kiwi.com deal was found by Cheapflights users on 1/20. 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 2/184:51 pm
STL
-
SFO
2 stops16h 29m
Frontier
Fri 3/69:04 pm
SFO
-
STL
1 stop10h 45m
Frontier
Deal found 1/20$192
This Trip.com deal was found by Cheapflights users on 1/19. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/113:28 pm
STL
-
SFO
1 stop11h 00m
Frontier
Thu 2/128:43 am
SFO
-
STL
1 stop10h 43m
Frontier
Deal found 1/19$194
This Kiwi.com deal was found by Cheapflights users on 1/20. 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 2/208:20 pm
STL
-
SFO
1 stop27h 35m
Frontier
Mon 3/29:03 am
SFO
-
STL
1 stop10h 10m
Frontier
Deal found 1/20$195
This Kiwi.com deal was found by Cheapflights users on 1/19. 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 2/142:51 pm
STL
-
SFO
1 stop11h 37m
Frontier
Sun 2/226:15 am
SFO
-
STL
1 stop28h 54m
Frontier
Deal found 1/19$197
This Frontier deal was found by Cheapflights users on 1/19. 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 2/201:59 pm
STL
-
SFO
1 stop12h 29m
Frontier
Wed 2/257:20 am
SFO
-
STL
1 stop6h 33m
Frontier
Deal found 1/19$199
This Orbitz deal was found by Cheapflights users on 1/18. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/184:51 pm
STL
-
SFO
1 stop17h 12m
Frontier
Sat 2/216:15 am
SFO
-
STL
1 stop5h 41m
Frontier
Deal found 1/18$201

Find flight deals from St. Louis to San Francisco

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to San Francisco (SFO). 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 January 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$171
(Kiwi.com)

One-way from

$58
(Trip.com)

Popular in

March

Cheapest in

April

Average price

$396

Good round-trip deal

$536 or less

Good one-way deal

$241 or less
Provider with most accurate pricing for Lambert-St Louis-San Francisco flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-San Francisco flights.
Search Deals
From Lambert-St Louis to San Francisco
Search Deals
One-way flight from Lambert-St Louis to San Francisco
Search Deals
High demand for flights, 1% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals
Price to beat on a round-trip flight from Lambert-St Louis to San Francisco.
Search Deals
Price to beat on a one-way flight from Lambert-St Louis to San Francisco.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to San Francisco 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 January 21, 2026.
Use the filters below to find and compare flights from St. Louis to San Francisco that are best for you.

Fly from

St. Louis

Fly to

San Francisco

Route

Depart

Return

Price

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Tue 3/3

2:22 pm-10:41 pm

2 stops10h 19m

San Francisco

Thu 3/5

10:20 am-12:25 am

2 stops12h 05m

$254

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Fri 2/27

2:22 pm-10:41 pm

2 stops10h 19m

San Francisco

Mon 3/2

10:20 am-12:25 am

2 stops12h 05m

$254

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Mon 3/2

2:22 pm-10:41 pm

2 stops10h 19m

San Francisco

Thu 3/5

10:20 am-12:25 am

2 stops12h 05m

$274

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Tue 3/3

7:00 am-3:48 pm

1 stop10h 48m

San Francisco

Thu 3/5

11:34 am-1:51 pm

1 stop24h 17m

$290

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Thu 2/19

2:47 pm-10:56 pm

1 stop10h 09m

San Francisco

Sat 3/7

7:28 pm-10:59 pm

1 stop25h 31m

$303

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Wed 3/4

7:00 am-3:48 pm

1 stop10h 48m

San Francisco

Sun 3/8

9:00 am-11:59 pm

2 stops12h 59m

$325

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Wed 3/25

3:05 pm-11:57 pm

2 stops10h 52m

San Francisco

Tue 3/31

6:00 am-5:07 pm

2 stops9h 07m

$335

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Wed 4/15

7:00 am-10:27 pm

1 stop17h 27m

San Francisco

Mon 4/27

7:59 pm-3:50 pm

1 stop17h 51m

$343

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Thu 2/19

6:40 pm-11:54 pm

1 stop7h 14m

San Francisco

Thu 2/26

10:20 am-12:25 am

2 stops12h 05m

$346

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Sat 3/7

10:14 am-6:36 pm

1 stop10h 22m

San Francisco

Mon 3/9

6:00 am-5:07 pm

2 stops9h 07m

$346

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/21

Showing 1-10 of 20 results
1
2

Compare providers for flights from St. Louis to San Francisco

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 St. Louis to San Francisco in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
PricelinePrice Accuracy1 starTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star
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 St. Louis-San Francisco flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-San Francisco flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-San Francisco flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-San Francisco flights, Cheapflights users trust Expedia the most. Expedia 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 St. Louis-San Francisco 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 St. Louis to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from St. Louis 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 St. Louis to San Francisco

How far ahead should I book a flight from St. Louis to San Francisco?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to San Francisco. Price data was last updated on January 16, 2026.

The best time to book flights from St. Louis to San Francisco is 76 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from St. Louis to San Francisco?

Currently, August is the cheapest month in which you can book a flight from St. Louis to San Francisco (average of $124). Flying from St. Louis to San Francisco in May is currently the most expensive (average of $256). 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 STL to SFO?

Find hourly flight availability from St. Louis to San Francisco. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 21, 2026.

It’s typically best to fly out from St. Louis to San Francisco at noon. Doing so could potentially save you 61% on the flight price compared to flying in the evening, which is usually more expensive.

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

Get insights into the airlines that provide service to San Francisco. 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 San Francisco. Reviews last updated January 21, 2026.
Read through reviews of airlines operating flights from St. Louis to San Francisco, such as Southwest, Delta, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,266 reviews

Boarding

8.1

Entertainment

7.5

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

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.
Southwest
8.0
Very good
4,266 reviews
Southwest
8.0
Very good
4,266 reviews

Boarding

8.1

Entertainment

7.5

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

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.
Delta
7.9
Good
8,089 reviews
Southwest
8.0
Very good
4,266 reviews

Boarding

8.1

Entertainment

7.5

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

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.
United Airlines
7.4
Good
9,191 reviews
Southwest
8.0
Very good
4,266 reviews

Boarding

8.1

Entertainment

7.5

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

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.
American Airlines
7.2
Good
11,174 reviews
Southwest
8.0
Very good
4,266 reviews

Boarding

8.1

Entertainment

7.5

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

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.
Frontier
5.7
Fair
3,057 reviews
Southwest
8.0
Very good
4,266 reviews

Boarding

8.1

Entertainment

7.5

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

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 St. Louis to San Francisco. 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 St. Louis to San Francisco?

    If you wish to fly to San Francisco from St. Louis, then you need to book flights from Lambert-St Louis to San Francisco. There are 4 flights from Lambert-St Louis (STL) to San Francisco (SFO) per day to choose from. Flights to San Francisco from Lambert-St Louis are available from 5 different airlines, which means you should have some options if you want to compare airfare deals. 4h 05m is how long a nonstop flight from St. Louis to San Francisco typically takes.

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

    This flight path from Lambert-St Louis to San Francisco was viewed by 16 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

    Delta and Alaska Airlines can get you from St. Louis to San Francisco in just under 10h 19m. Your travel time can differ by up to 29m. The distance from St. Louis to San Francisco is about 1730 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    According to our current data, Frontier ($120), American Airlines ($180), and Delta ($251) offers the cheapest pricing from St. Louis to San Francisco. Frontier is currently priced 69% below the average price you’ll pay for this route.

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

    The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $74. However, be on the lookout for offers from Delta and United Airlines, as they are both options that can get you from St. Louis to San Francisco for a low price.

  • What are the most reliable airlines from St. Louis to San Francisco?

    The top 3 most reliable airlines when flying from St. Louis to San Francisco are SkyWest Airlines (84%), United Airlines (83%) and Air New Zealand (72%).

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

    Looking for the cheapest flight from St. Louis to San Francisco? While on average our users pay $534, our data indicates the cheapest price to be $173. The most popular route (Lambert-St Louis - San Francisco), is priced around $211.

  • Can I find deals for flights from St. Louis to San Francisco that include hotel bookings?

    Yes. In addition to deals on St. Louis to San Francisco flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to San Francisco?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to San Francisco.

  • Can I find deals for business class flights from St. Louis to San Francisco?

    Yes. Cheapflights offers flight deals from St. Louis to San Francisco 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 St. Louis to San Francisco?

    Currently, August is the cheapest month in which you can book a flight from St. Louis to San Francisco (average of $124). Flying from St. Louis to San Francisco in May is currently the most expensive (average of $256). 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
South San Francisco
Santa Cruz
Roseville
Santa Clara
Livermore
Watsonville
San Bruno
Daly City
Sunnyvale
Vacaville
Turlock
San Carlos
San Ramon
Manteca
Vallejo
San Lorenzo
Davis
Hollister
Redwood City
Union City

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Alternative routes for St. Louis to San Francisco

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from St. Louis to San Francisco

Discover the top 5 airlines that operate flights from St. Louis to San Francisco. 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 January 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$120Average$225FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$180Average$359FlexibilityNo cancel feeOn-time71%
DeltaCheapest$251Average$368FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$272Average$438FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$312Average$474FlexibilityNo cancel feeOn-time63%

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