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

Popular airlines from San Francisco Intl. Airport (SFO) to St. Louis, MO (CPS-St. Louis Downtown)

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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 $332
STL
Lambert-St. Louis Intl.
Cheapest
Average driving time to city center20 min
Flights from $332

Frequently asked questions

How much does a flight from San Francisco Intl. Airport (SFO) to St. Louis Downtown Airport (CPS) cost?
Lock in a cheap one-way flight or cheap return flight from San Francisco Intl. Airport (SFO) to St. Louis Downtown Airport (CPS) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from San Francisco Intl. Airport (SFO) to St. Louis Downtown Airport (CPS)?
The cheapest month to fly from SFO to CPS is , when there's less demand. Off-peak season is often when airlines offer better prices between these airports.
What is the cheapest airline that flies from San Francisco Intl. Airport (SFO) to St. Louis Downtown Airport (CPS)?
To find the cheapest airline flying from SFO to CPS, use Expedia's filter tool. Tailor your search based on your travel style, such as preferred carriers and number of stops. You can then sort your results by "Price (lowest to highest)" to list the most affordable options first.
How many flights per day from San Francisco Intl. Airport (SFO) to St. Louis Downtown Airport (CPS)?
There are no daily nonstop flights departing from San Francisco Intl. Airport (SFO) to St. Louis Downtown Airport (CPS). But you can book flights with layovers. Filter your search results on Expedia to include one or two stops, and you'll be cruising above the clouds in no time at all.
What day of the week has the most flights from SFO to CPS?
You'll usually find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can vary from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from San Francisco Intl. Airport (SFO) to St. Louis Downtown Airport (CPS)?
To avoid potential delays on the San Francisco Intl. Airport (SFO) to St. Louis Downtown Airport (CPS) route, travel before 3 PM. Departures after this hour have a 22% higher chance of cancellation.**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 East St. Louis from San Francisco Intl. Airport (SFO)?
Check out your flight options from San Francisco Intl. Airport (SFO) to Lambert-St. Louis Intl. Airport (STL). This is the only airport in East St. Louis you can jet into if you're taking a direct flight.
Is it cheaper to buy a plane ticket from San Francisco Intl. Airport (SFO) to St. Louis Downtown Airport (CPS) last-minute?
Booking your flight from SFO to CPS just before your journey is generally more expensive. But if there's some wiggle room with your travel dates and times, you could grab a cheap last-minute fare.
Is it cheaper to book a SFO to CPS flight and hotel package?
Compared with arranging flights and hotels separately, booking a SFO to CPS flight and hotel package with Expedia could lead to significant savings. What's more, managing everything in one place takes the hassle out of travel planning. Simply secure your flights and select from our extensive range of stays, then customize your trip with extras like activities and car rentals.
Can I cancel or change the date of my flight from San Francisco Intl. Airport (SFO) to St. Louis Downtown Airport (CPS)?
If you reserved your SFO to CPS flight in the last 24 hours, you may be able to cancel or modify it at no cost. Depending on the airline and the type of ticket you purchased, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal for further details.

Travel information

Origin airport
San Francisco Intl.
Destination airport
St. Louis Downtown
Distance
1744 mi

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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 . 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 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.

 

San Francisco to St. Louis Flights

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