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$88+ 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 2/2. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SFO
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Find cheap flights from St. Louis to San Francisco 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”

2. Select your favorite providers

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3. Compare prices and book

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Cheapflights Tip: The best prices from Lambert-St Louis to San Francisco are usually found in February or April, booked 76 days in advance, depart on a Thursday or Saturday 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 December 12, 2025.

This Frontier deal was found by Cheapflights users on 12/11. 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.
Sat 12/2010:10 pmSTL - SFO
1 stop11h 38mFrontier
Thu 1/810:18 pmSFO - STL
1 stop11h 54mFrontier
Deal found 12/11$207
This Frontier deal was found by Cheapflights users on 12/10. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/2010:10 pmSTL - SFO
1 stop11h 38mFrontier
Wed 12/3111:20 pmSFO - STL
1 stop8h 20mFrontier
Deal found 12/10$252
This Expedia deal was found by Cheapflights users on 12/11. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2110:10 pmSTL - SFO
1 stop11h 38mFrontier
Sun 1/46:24 amSFO - STL
1 stop25h 38mFrontier
Deal found 12/11$262
This Frontier deal was found by Cheapflights users on 12/10. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/2010:10 pmSTL - SFO
1 stop11h 38mFrontier
Thu 1/16:00 amSFO - STL
1 stop8h 24mFrontier
Deal found 12/10$278
This Travelocity deal was found by Cheapflights users on 12/11. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2210:10 pmSTL - SFO
1 stop25h 26mFrontier
Thu 1/16:00 amSFO - STL
1 stop8h 24mFrontier
Deal found 12/11$284
This CheapOair deal was found by Cheapflights users on 12/10. 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 12/137:43 pmSTL - SFO
1 stop14h 10mFrontier
Tue 12/166:30 amSFO - STL
1 stop25h 44mFrontier
Deal found 12/10$285
This Booking.com deal was found by Cheapflights users on 12/11. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/247:43 pmSTL - SFO
1 stop6h 41mFrontier
Wed 12/3111:20 pmSFO - STL
1 stop8h 20mFrontier
Deal found 12/11$298
This Priceline deal was found by Cheapflights users on 12/11. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/121:16 pmSTL - SFO
1 stop10h 09mFrontier
Sat 1/177:00 amSFO - STL
1 stop5h 48mFrontier
Deal found 12/11$301
This Frontier deal was found by Cheapflights users on 12/11. 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.
Sat 12/2010:10 pmSTL - SFO
1 stop11h 38mFrontier
Sat 12/2711:25 pmSFO - STL
1 stop8h 15mFrontier
Deal found 12/11$307
This CheapOair deal was found by Cheapflights users on 12/10. 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.
Mon 12/2210:10 pmSTL - SFO
1 stop25h 26mFrontier
Sun 12/286:24 amSFO - STL
1 stop25h 38mFrontier
Deal found 12/10$309
This Trip.com deal was found by Cheapflights users on 12/11. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2110:10 pmSTL - SFO
1 stop11h 38mFrontier
Thu 12/256:00 amSFO - STL
1 stop8h 24mFrontier
Deal found 12/11$310

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 December 12, 2025.

Most accurate provider

Gotogate
3 stars

Most trusted provider

Gotogate
3 stars

Round-trip from

$148
(Expedia)

One-way from

$88
(Trip.com)

Popular in

March

Cheapest in

February

Average price

$441

Good round-trip deal

$503 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, 3% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 December 12, 2025.
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

Thu 2/19

6:10 am-3:56 pm

2 stops11h 46m

San Francisco

Mon 2/23

10:20 am-12:25 am

2 stops12h 05m

$254

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Wed 1/14

6:35 am-5:49 pm

2 stops13h 14m

San Francisco

Wed 1/21

10:30 am-9:38 pm

2 stops9h 08m

$254

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Thu 2/19

10:11 pm-7:48 am

1 stop11h 37m

San Francisco

Sun 2/22

6:15 am-1:09 pm

1 stop28h 54m

$260

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Thu 2/19

10:11 pm-7:48 am

1 stop11h 37m

San Francisco

Mon 2/23

8:16 pm-6:51 am

2 stops32h 35m

$270

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Thu 2/26

2:47 pm-11:59 pm

1 stop11h 12m

San Francisco

Mon 3/2

8:47 pm-1:51 pm

1 stop15h 04m

$312

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Wed 2/18

10:12 am-6:36 pm

1 stop10h 24m

San Francisco

Sat 2/21

10:25 am-9:38 pm

2 stops9h 13m

$332

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Wed 2/18

7:00 am-9:55 pm

1 stop16h 55m

San Francisco

Sat 2/21

8:47 pm-2:23 pm

1 stop15h 36m

$341

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Thu 2/12

2:47 pm-10:56 pm

1 stop10h 09m

San Francisco

Tue 2/17

11:34 am-1:51 pm

1 stop24h 17m

$341

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Thu 2/26

2:22 pm-10:41 pm

2 stops10h 19m

San Francisco

Mon 3/2

10:54 pm-9:32 am

1 stop8h 38m

$347

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Sat 1/31

3:31 pm-11:30 pm

2 stops9h 59m

$127

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/11

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 December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star
GotogatePrice Accuracy3 starsTrust Score*3 stars
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 Gotogate to be most consistent on Cheapflights vs. Gotogate Users can find the same prices on St. Louis-San Francisco flight deals on Cheapflights vs. Gotogate >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 Gotogate the most. Gotogate 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 December 5, 2025.

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 $123). 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 December 12, 2025.

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.

What is the cheapest day to fly from St. Louis to San Francisco?

Use this chart to determine the cheapest time to fly round-trip from St. Louis to San Francisco. Price data was last updated on December 6, 2025.

Travelers seeking maximum savings on their St. Louis to San Francisco flight should consider departing on Wednesday at noon when fares are most often at their lowest. Wednesday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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
Airports
STL

Security lines at STL are generally quick, averaging 5-10 minutes off-peak. Check real-time wait times online before heading to the airport.

Read more about STLBy Taryn White
SFO

For a budget-friendly trip from SFO to downtown, take BART. It's a 40-minute ride from the airport.

Read more about SFOBy Harriet Baskas
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

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 December 12, 2025.
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
7.9
Good
4,253 reviews

Boarding

8.1

Food

7.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

Overall

7.9

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
7.9
Good
4,253 reviews
Southwest
7.9
Good
4,253 reviews

Boarding

8.1

Food

7.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

Overall

7.9

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
8,008 reviews
Southwest
7.9
Good
4,253 reviews

Boarding

8.1

Food

7.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

Overall

7.9

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
9,095 reviews
Southwest
7.9
Good
4,253 reviews

Boarding

8.1

Food

7.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

Overall

7.9

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
11,050 reviews
Southwest
7.9
Good
4,253 reviews

Boarding

8.1

Food

7.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

Overall

7.9

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
5.8
Fair
3,084 reviews
Southwest
7.9
Good
4,253 reviews

Boarding

8.1

Food

7.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

Overall

7.9

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 2 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 17 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 Frontier can get you from St. Louis to San Francisco in just under 11h 37m. Your travel time can differ by up to 09m. 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 ($119), American Airlines ($182), 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 $72. However, be on the lookout for offers from United Airlines and American 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 (75%), United Airlines (75%) and Air New Zealand (75%).

  • 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 $638, our data indicates the cheapest price to be $203. The most popular route (Lambert-St Louis - San Francisco), is priced around $223.

  • 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 $123). 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
Roseville
South San Francisco
Santa Cruz
Livermore
Turlock
Manteca
Watsonville
Sunnyvale
Santa Clara
San Bruno
Redwood City
Daly City
Vallejo
Hollister
Foster City
Union City
Davis
San Ramon
Burlingame
Milpitas

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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 December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$122Average$234FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$182Average$336FlexibilityNo cancel feeOn-time71%
DeltaCheapest$264Average$374FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$264Average$431FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$309Average$457FlexibilityNo cancel feeOn-time63%

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