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

View $82 flight on Sat, Nov 1, 2025Opens in a new window

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

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

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
Tue, Nov 4 - Sat, Nov 8
STL
St. Louis
SFO
San Francisco
$163 Roundtrip, found 1 hour ago
$163
Roundtrip
found 1 hour ago
Select United flight, departing Tue, Nov 4 from St. Louis to San Francisco, returning Sat, Nov 8, priced at $163 found 1 hour ago
Southwest Airlines
Tue, Nov 4 - Sat, Nov 8
STL
St. Louis
SFO
San Francisco
$166 Roundtrip, found 1 hour ago
$166
Roundtrip
found 1 hour ago
Select Southwest Airlines flight, departing Tue, Nov 4 from St. Louis to San Francisco, returning Sat, Nov 8, priced at $166 found 1 hour ago
Frontier Airlines
Thu, Oct 16 - Sun, Oct 19
STL
St. Louis
SFO
San Francisco
$166 Roundtrip, just found
$166
Roundtrip
just found
Select Frontier Airlines flight, departing Thu, Oct 16 from St. Louis to San Francisco, returning Sun, Oct 19, priced at $166 just found
Frontier Airlines
Fri, Oct 31 - Wed, Nov 5
STL
St. Louis
SFO
San Francisco
$167 Roundtrip, found 1 day ago
$167
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Fri, Oct 31 from St. Louis to San Francisco, returning Wed, Nov 5, priced at $167 found 1 day ago
United
Thu, Oct 30 - Sun, Nov 2
STL
St. Louis
SFO
San Francisco
$171 Roundtrip, found 8 hours ago
$171
Roundtrip
found 8 hours ago
Select United flight, departing Thu, Oct 30 from St. Louis to San Francisco, returning Sun, Nov 2, priced at $171 found 8 hours ago
Frontier Airlines
Mon, Oct 27 - Sat, Nov 1
STL
St. Louis
SFO
San Francisco
$172 Roundtrip, found 2 days ago
$172
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Mon, Oct 27 from St. Louis to San Francisco, returning Sat, Nov 1, priced at $172 found 2 days ago
Southwest Airlines
Tue, Nov 4 - Sat, Nov 8
STL
St. Louis
SFO
San Francisco
$173 Roundtrip, found 1 hour ago
$173
Roundtrip
found 1 hour ago
Select Southwest Airlines flight, departing Tue, Nov 4 from St. Louis to San Francisco, returning Sat, Nov 8, priced at $173 found 1 hour ago
United
Sun, Dec 14 - Fri, Jan 9
STL
St. Louis
SFO
San Francisco
$174 Roundtrip, found 6 hours ago
$174
Roundtrip
found 6 hours ago
Select United flight, departing Sun, Dec 14 from St. Louis to San Francisco, returning Fri, Jan 9, priced at $174 found 6 hours ago
American Airlines
Tue, Oct 14 - Sat, Oct 18
STL
St. Louis
SFO
San Francisco
$183 Roundtrip, just found
$183
Roundtrip
just found
Select American Airlines flight, departing Tue, Oct 14 from St. Louis to San Francisco, returning Sat, Oct 18, priced at $183 just found
Alaska Airlines
Wed, Oct 15 - Sun, Oct 19
STL
St. Louis
SFO
San Francisco
$196 Roundtrip, found 1 hour ago
$196
Roundtrip
found 1 hour ago
Select Alaska Airlines flight, departing Wed, Oct 15 from St. Louis to San Francisco, returning Sun, Oct 19, priced at $196 found 1 hour ago

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

October is typically the cheapest month to fly

From $118 - $316 per traveler.

Alternative airports near San Francisco

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

Select flight to Norman Y. Mineta San Jose Intl. SJC. Average driving time to city center is 50 minutes. Flights from $393
SJC
Norman Y. Mineta San Jose Intl.
Average driving time to city center50 min
Flights from $393
Flights from St. Louis (STL) to San Francisco (SFO)
Origin airport
Lambert-St. Louis Intl.
Destination airport
San Francisco Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Southwest Airlines, United
Roundtrip price
$163
Distance
1731 mi
Average flight time
2 hours 13 mins

St. Louis to San Francisco Flights

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

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 St. Louis to San Francisco are during the month of November. You can find some of the cheapest flights from St. Louis to San Francisco with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from St. Louis to San Francisco: 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 St. Louis to San Francisco

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 St. Louis to San Francisco 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 St. Louis to San Francisco 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 St. Louis to San Francisco 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 Lambert-St. Louis Intl. Airport (STL) to San Francisco Intl. Airport (SFO) cost?
Secure a cheap one-way flight from $82 or cheap return flight from $163 from Lambert-St. Louis Intl. Airport (STL) to San Francisco Intl. Airport (SFO) 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 Lambert-St. Louis Intl. Airport (STL) to San Francisco Intl. Airport (SFO)?
November is the most affordable month to fly from STL to SFO. Avoiding peak travel times is often the key to finding better fares.
Which airlines fly direct from Lambert-St. Louis Intl. Airport (STL) to San Francisco Intl. Airport (SFO)?
Take a direct flight with United Airlines and journey straight from Lambert-St. Louis Intl. Airport (STL) to San Francisco Intl. Airport (SFO).
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to San Francisco Intl. Airport (SFO)?
The cheapest airline to offer flights between Lambert-St. Louis Intl. Airport (STL) and San Francisco Intl. Airport (SFO) can change depending on when you want to travel. Southwest Airlines and United Airlines are just some good options offering well-priced fares. Use Expedia's search tool to compare airlines in one place and find the right STL to SFO flight for your budget.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to San Francisco Intl. Airport (SFO)?
On average, only 1 direct flight departs daily from Lambert-St. Louis Intl. Airport (STL) to San Francisco Intl. Airport (SFO). Need other options? Use Expedia's filter tool to discover flights with layovers and explore a new city along the way.
What are the most popular departure times for flights from Lambert-St. Louis Intl. Airport (STL) to San Francisco Intl. Airport (SFO)?
Flights between STL and SFO are their busiest at 7 AM. If you'd like a more relaxed atmosphere and possibly cheaper fares, look for a departure that's outside typical rush times.
What day of the week has the most flights from STL to SFO?
Friday offers the most flights from Lambert-St. Louis Intl. Airport (STL) to San Francisco Intl. Airport (SFO). Consider jetting off on this day and you'll have a greater chance of finding a departure that fits your itinerary.
What is the earliest flight from Lambert-St. Louis Intl. Airport (STL) to San Francisco Intl. Airport (SFO)?
Lambert-St. Louis Intl. Airport (STL)'s earliest flight to San Francisco Intl. Airport (SFO) takes off at approximately 7:00AM UTC-6. With a flight time of 4h 45m, you'll arrive at around 9:45AM UTC-8.
How long does it take to fly from Lambert-St. Louis Intl. Airport (STL) to San Francisco Intl. Airport (SFO)?
It takes approximately 4 hours and 39 minutes to cover the 1,750 mi from STL to SFO.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to San Francisco Intl. Airport (SFO)?
Book a flight from Lambert-St. Louis Intl. Airport (STL) to San Francisco Intl. Airport (SFO) that leaves before 3 PM to reduce the risk of cancellations. Later departures 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 San Francisco from Lambert-St. Louis Intl. Airport (STL)?
If you're on a direct flight from Lambert-St. Louis Intl. Airport (STL) to San Francisco, San Francisco Intl. Airport (SFO) is the only airport you can land at.
Is it cheaper to buy a plane ticket from Lambert-St. Louis Intl. Airport (STL) to San Francisco Intl. Airport (SFO) last-minute?
Booking your flight from STL to SFO right before your journey is typically more expensive. However, if you're flexible with your departure times and dates, you could score a cheap last-minute fare.
Is it cheaper to book a STL to SFO flight and hotel package?
Compared with arranging hotels and flights separately, booking a STL to SFO flight and hotel package with Expedia could result in significant savings. Better still, having it all in one place will take the stress out of planning your trip. Simply pick your flights and select from our wide range of stays, then customize your trip with extras like activities, tours and car rentals.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to San Francisco Intl. Airport (SFO)?
If you reserved your STL to SFO flight in the last 24 hours, you may be able to modify or cancel it at no cost. Depending on the airline and the type of fare you purchased, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal for more details.

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*Available to One Key members.