Cheap flights from San Francisco to St. Louis from $117
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Francisco to St. Louis departing on 9/30. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Frontier flights from San Francisco to St. Louis
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Alaska Airlines flights from San Francisco to St. Louis
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How to get the cheapest flight ticket from San Francisco to St. Louis
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to St. Louis?
In general, January is the cheapest month to fly from San Francisco to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $329. The month of February is another great option to travel to St. Louis, with average flight prices from San Francisco averaging around $339.
What is the cheapest day to depart on your flight to St. Louis?
The cheapest day to depart on your flight to St. Louis is on a Saturday when prices can be found for as low as $421. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $468. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.
What is the cheapest time of day to depart on your flight to St. Louis?
Flying to St. Louis from San Francisco at noon is the least expensive time of day to depart. momondo users have found prices as low as $415 when looking at flights departing at noon. In the afternoon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $452 per ticket.
What is the cheapest San Francisco to Lambert-St Louis flight route?
Fly from San Francisco to Lambert-St Louis for the best San Francisco - Lambert-St Louis flight prices
How far in advance should I book a flight to St. Louis?
You are more likely to see cheaper flights to St. Louis from San Francisco when booking 6 weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $397 when searching 6 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from San Francisco for as low as $364 on momondo.
What cabin class options are available on San Francisco to Lambert-St Louis flights?
There are 4 cabin classes available to choose from on San Francisco to Lambert-St Louis flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from San Francisco to Lambert-St Louis?
Frontier, Hawaiian Airlines, and Sun Country Air are the most popular carriers operating from San Francisco to Lambert-St Louis
What airlines fly to St. Louis?
United Airlines, Southwest and Delta are the top three most popular airlines that fly to St. Louis from San Francisco according to our data. United Airlines is the first choice among our users, with 45% of people opting to fly with this airline when traveling to St. Louis. Keep in mind that there are 6 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.
How many flights depart from San Francisco to St. Louis on average per day?
The number of flights available between San Francisco and St. Louis is 5 per day as of June 2025. The most frequent departure time is 11:00AM, with 65% of daily flights leaving at noon.
How many flights depart from San Francisco to St. Louis on average per week?
As of June 2025, 39 flights take off from San Francisco and land in St. Louis each week. The most common flight departure day for this route is Mon, with 21% of weekly flights taking off on this day.
When to book flights from San Francisco to St. Louis
Cheap San Francisco to St. Louis (SFO to STL) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from San Francisco to St. Louis
How far is San Francisco to Lambert-St Louis by plane?
The straight-line distance from San Francisco to Lambert-St Louis is 1739.7 mi. 3h 40m is a normal flight duration for this route.
When did momondo last update prices for flights from San Francisco Airport to Lambert-St Louis Airport?
Prices for flights from San Francisco Airport to Lambert-St Louis Airport are refreshed on a daily basis.
How many operators does momondo search for flights from San Francisco Airport to Lambert-St Louis Airport?
As of June 2025, there are 5 operators available to choose from for flights from San Francisco Airport to Lambert-St Louis Airport.
How old do you have to be to fly from San Francisco Airport to Lambert-St Louis Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from San Francisco Airport to Lambert-St Louis Airport.
What documentation or ID do you need to fly to Lambert-St Louis Airport?
The travel and health documents you'll need for your trip to Lambert-St Louis Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Lambert-St Louis Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from San Francisco to St. Louis?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from San Francisco to St. Louis is Boeing 737-800 Passenger/BBJ2 (winglets) (17.81% of total bookings). The next most popular plane models are Boeing 737 MAX 9 (17.40%), Boeing 737 MAX 8 (14.12%), and Airbus A319 (13.51%).
What is the most popular airline from San Francisco to St. Louis?
Based on momondo bookings for flights between San Francisco and St. Louis, the leading airline is United Airlines, making up 50% of the total bookings. Other popular airlines include Southwest with 18%, Frontier with 13%, and American Airlines with 11%.
Best airlines flying from San Francisco to St. Louis
Compare and see reviews for airlines that fly from San Francisco to St. Louis with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $108 | Free Cancellation | Rating 5.9 3,295 reviews | |||
| PriceFrom $246 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $256 | Free Cancellation | Rating 8.0 7,950 reviews | |||
| PriceFrom $290 | Free Cancellation | Rating 7.4 8,790 reviews | |||
| PriceFrom $310 | Free Cancellation | Rating 8.0 4,287 reviews |
Southwest Flights From San Francisco to St. Louis
The lowest priced Southwest flight from San Francisco to St. Louis from the last 72 hours was $310. Generally, Southwest has 8 flights on this route every week with an average price of $443. Southwest is rated 8.0/10 by our users.
United Airlines Flights From San Francisco to St. Louis
Another popular option for San Francisco to St. Louis flights is United Airlines (7.4/10, 8,790 ratings). United Airlines flies from San Francisco to St. Louis around 15 times per week, with deals starting from $290 round-trip and rising to an average price of around $437.
Traveling to a place near St. Louis?
Book flights to St. Louis if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from San Francisco to St. Louis?
We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from San Francisco to St. Louis for you.
Can I find flights from San Francisco to St. Louis with flexible booking policies on momondo?
Yes. momondo allows you to filter the results for San Francisco to St. Louis flights to just show those with flexible booking policies.
How can momondo help me find flights from San Francisco to St. Louis?
Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to St. Louis from San Francisco.
I’m not ready to book a flight from San Francisco to St. Louis right now. Can momondo alert me if prices change?
Price alerts on flights to St. Louis from San Francisco are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.