$82 Cheap Flights from San Francisco (SFO) to St. Louis (STL)

View $82 flight on Wed, Oct 29, 2025Opens in a new window

Popular airlines from San Francisco Intl. Airport (SFO) to St. Louis Lambert Intl. Airport (STL)

Cheap Flights from San Francisco to St. Louis (SFO-STL)

Prices were available within the past 7 days and start at $82 for one-way flights and $163 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Wed, Dec 3 - Tue, Dec 9
SFO
San Francisco
STL
St. Louis
$163 Roundtrip, found 23 hours ago
$163
Roundtrip
found 23 hours ago
Select United flight, departing Wed, Dec 3 from San Francisco to St. Louis, returning Tue, Dec 9, priced at $163 found 23 hours ago
Frontier Airlines
Mon, Sep 29 - Thu, Oct 2
SFO
San Francisco
STL
St. Louis
$169 Roundtrip, found 2 hours ago
$169
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Mon, Sep 29 from San Francisco to St. Louis, returning Thu, Oct 2, priced at $169 found 2 hours ago
Frontier Airlines
Thu, Oct 30 - Mon, Nov 3
SFO
San Francisco
STL
St. Louis
$173 Roundtrip, found 4 hours ago
$173
Roundtrip
found 4 hours ago
Select Frontier Airlines flight, departing Thu, Oct 30 from San Francisco to St. Louis, returning Mon, Nov 3, priced at $173 found 4 hours ago
American Airlines
Wed, Dec 3 - Tue, Dec 9
SFO
San Francisco
STL
St. Louis
$174 Roundtrip, found 23 hours ago
$174
Roundtrip
found 23 hours ago
Select American Airlines flight, departing Wed, Dec 3 from San Francisco to St. Louis, returning Tue, Dec 9, priced at $174 found 23 hours ago
American Airlines
Wed, Oct 8 - Sat, Oct 11
SFO
San Francisco
STL
St. Louis
$176 Roundtrip, found 4 hours ago
$176
Roundtrip
found 4 hours ago
Select American Airlines flight, departing Wed, Oct 8 from San Francisco to St. Louis, returning Sat, Oct 11, priced at $176 found 4 hours ago
Frontier Airlines
Thu, Nov 6 - Sun, Nov 9
SFO
San Francisco
STL
St. Louis
$176 Roundtrip, just found
$176
Roundtrip
just found
Select Frontier Airlines flight, departing Thu, Nov 6 from San Francisco to St. Louis, returning Sun, Nov 9, priced at $176 just found
United
Wed, Oct 29 - Fri, Oct 31
SFO
San Francisco
STL
St. Louis
$179 Roundtrip, found 1 hour ago
$179
Roundtrip
found 1 hour ago
Select United flight, departing Wed, Oct 29 from San Francisco to St. Louis, returning Fri, Oct 31, priced at $179 found 1 hour ago
Frontier Airlines
Fri, Oct 31 - Sat, Nov 8
SFO
San Francisco
STL
St. Louis
$182 Roundtrip, found 1 day ago
$182
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Fri, Oct 31 from San Francisco to St. Louis, returning Sat, Nov 8, priced at $182 found 1 day ago
Southwest Airlines
Wed, Dec 3 - Tue, Dec 9
SFO
San Francisco
STL
St. Louis
$184 Roundtrip, found 23 hours ago
$184
Roundtrip
found 23 hours ago
Select Southwest Airlines flight, departing Wed, Dec 3 from San Francisco to St. Louis, returning Tue, Dec 9, priced at $184 found 23 hours ago
Alaska Airlines
Mon, Oct 27 - Tue, Nov 4
SFO
San Francisco
STL
St. Louis
$198 Roundtrip, found 7 hours ago
$198
Roundtrip
found 7 hours ago
Select Alaska Airlines flight, departing Mon, Oct 27 from San Francisco to St. Louis, returning Tue, Nov 4, priced at $198 found 7 hours ago

Find the cheapest month to fly from San Francisco (SFO) to St. Louis (STL)

October is typically the cheapest month to fly

From $118 - $314 per traveler.

Alternative airports near St. Louis

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Lambert-St. Louis Intl. STL. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $299
STL
Lambert-St. Louis Intl.
Cheapest
Average driving time to city center20 min
Flights from $299
Flights from San Francisco (SFO) to St. Louis (STL)
Origin airport
San Francisco Intl.
Destination airport
Lambert-St. Louis Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Southwest Airlines, United
Roundtrip price
$163
Distance
1731 mi
Average flight time
6 hours 20 mins

San Francisco to St. Louis Flights

The cheapest times to fly from San Francisco to St. Louis

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from San Francisco to St. Louis are during the month of December. You can find some of the cheapest flights from San Francisco to St. Louis with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from San Francisco to St. Louis

Sunday is one of the best days to book for cheap flights from San Francisco to St. Louis: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from San Francisco to St. Louis

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from San Francisco to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from $82 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap San Francisco to St. Louis flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your San Francisco to St. Louis airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from San Francisco Intl. Airport (SFO) to Lambert-St. Louis Intl. Airport (STL) cost?
Secure a cheap one-way flight from $82 or cheap return flight from $163 from San Francisco Intl. Airport (SFO) to Lambert-St. Louis Intl. Airport (STL) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from San Francisco Intl. Airport (SFO) to Lambert-St. Louis Intl. Airport (STL)?
Planning your trip for December is a good way to save, as it's the cheapest month for flights between SFO and STL. You'll often find the lowest fares during the off-season.
Which airlines fly direct from San Francisco Intl. Airport (SFO) to Lambert-St. Louis Intl. Airport (STL)?
Board a direct flight with United Airlines and go straight from San Francisco Intl. Airport (SFO) to Lambert-St. Louis Intl. Airport (STL).
What is the cheapest airline that flies from San Francisco Intl. Airport (SFO) to Lambert-St. Louis Intl. Airport (STL)?
While prices can vary depending on your travel dates, Southwest Airlines and United Airlines are go-to choices for flights between San Francisco Intl. Airport (SFO) and Lambert-St. Louis Intl. Airport (STL). You can also compare airlines on Expedia and use the "Sort by" filter to find the cheapest fare for your SFO to STL flight.
How many flights per day from San Francisco Intl. Airport (SFO) to Lambert-St. Louis Intl. Airport (STL)?
On average, there's only 1 nonstop flight operating from San Francisco Intl. Airport (SFO) to Lambert-St. Louis Intl. Airport (STL) every day. If this doesn't work for you, consider flights with layovers. Just customize your search on Expedia to include one or two stops to find the next best option.
What are the most popular departure times for flights from San Francisco Intl. Airport (SFO) to Lambert-St. Louis Intl. Airport (STL)?
Flights between SFO and STL are their busiest at 10 AM. If you'd like a more relaxed trip and possibly cheaper tickets, choose a departure that's outside typical rush times.
What day of the week has the most flights from SFO to STL?
If you jet off on a Friday, you'll get the biggest range of options for flights from San Francisco Intl. Airport (SFO) to Lambert-St. Louis Intl. Airport (STL).
What is the earliest flight from San Francisco Intl. Airport (SFO) to Lambert-St. Louis Intl. Airport (STL)?
The first flight of the day leaving San Francisco Intl. Airport (SFO) is at around 10:05AM UTC-8. Board this plane and you'll touch down at Lambert-St. Louis Intl. Airport (STL) at approximately 3:55PM UTC-6. The total travel time is 3h 50m.
How long does it take to fly from San Francisco Intl. Airport (SFO) to Lambert-St. Louis Intl. Airport (STL)?
The average flight duration from SFO to STL is 3 hours and 54 minutes, covering a total distance of 1,750 mi.
What airline has the least delays from SFO to STL?
With 84% of flights generally landing on time, Southwest Airlines has the best on-time performance for nonstop flights from San Francisco Intl. Airport (SFO) to Lambert-St. Louis Intl. Airport (STL). To check your flight status and receive notifications about any changes, head to the Expedia App.
What is the best time to fly from San Francisco Intl. Airport (SFO) to Lambert-St. Louis Intl. Airport (STL)?
Select a flight from San Francisco Intl. Airport (SFO) to Lambert-St. Louis Intl. Airport (STL) that leaves before 3 PM to reduce the risk of cancellations. Departures later than this have a 22% higher chance of being canceled, on average.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for St. Louis from San Francisco Intl. Airport (SFO)?
Compare your flight options from San Francisco Intl. Airport (SFO) to Lambert-St. Louis Intl. Airport (STL). This is the only airport in St. Louis you can arrive at if you're taking a direct flight.
Is it cheaper to buy a plane ticket from San Francisco Intl. Airport (SFO) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Holding off until just before your departure to book a ticket from SFO to STL often results in higher prices. Although you may find some last-minute offers, they aren't always guaranteed. Be flexible with your itinerary for a better chance of landing a bargain.
Is it cheaper to book a SFO to STL flight and hotel package?
Booking a SFO to STL flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your trip in one place. Choose from our impressive range of accommodations and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from San Francisco Intl. Airport (SFO) to Lambert-St. Louis Intl. Airport (STL)?
Typically, it's possible to cancel or reschedule your SFO to STL flight. However, if the booking was made more than 24 hours ago, additional charges may apply. Refer to your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find more details on our Customer Service portal.

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*Available to One Key members.