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

Compare San Francisco International to St Louis flight deals

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Map with a flight path from San Francisco International to St Louis. A plane icon is halfway along the route with a label that says "Direct flight".
Direct flight

Your route at a glance

Cheapest deal$265
Cheapest monthSeptember
Average flight duration3 hours and 58 minutes
Most popular airlineSouthwest Airlines

Flight deals from San Francisco International to St Louis

Looking for a cheap last-minute deal or the best return flight from San Francisco International to St Louis? Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from San Francisco International to St Louis

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like San Francisco International to St Louis flights are currently cheapest in September.

Direct flights from San Francisco International to St Louis

San Francisco International to St Louis: Alternative routes

Compare routes from San Francisco International to St Louis below. You may find an airport to fly into that's cheaper, faster, or easier than St Louis.

Finding cheap flights from San Francisco International to St Louis: Frequently asked questions

The best price we found for a return flight from San Francisco International to St Louis is $265. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
3 hours and 58 minutes is the average flight time from San Francisco International to St Louis.
United, Southwest Airlines and SkyWest Airlines fly direct from San Francisco International to St Louis.
As of August 2025, there are 23 flights per week flying from San Francisco International to St Louis.
The cheapest month to fly from San Francisco International to St Louis is usually September.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from San Francisco International Airport to St Louis Airport on Wednesday, 10 September 2025.
Yes – the average flight time is 3 hours and 58 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to St Louis but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to St Louis is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, United offers the cheapest flight tickets to St Louis.

Travelling from San Francisco International Airport (SFO) to Lambert-St. Louis International Airport (STL): what you need to know

  • Book a direct flight from San Francisco International Airport to Lambert-St. Louis International Airport and you'll be travelling for an average of 3 hours 50 minutes.

  • The timezone in St Louis is UTC-5, which is two hours ahead of San Francisco.

  • You can choose from 22 weekly San Francisco International Airport to Lambert-St. Louis International Airport flights. The 07:00 departure with Southwest Airlines is the earliest you can take. United Airlines operates the latest service of the day at 18:38.

  • To ensure you get on your SFO to STL flight, leave plenty of time for things like baggage drop and finding your gate. Turning up two hours ahead of international departures and one hour before domestic flights is the general rule.

  • Travelling during a peak time such as August? Public holidays and other popular seasons can result in longer queues and delays at airport checkpoints. Play it safe and arrive up to four hours before international flights and two hours before domestic departures.

  • Travelling to St Louis (and then exploring more of United States!) is a breeze with United Airlines. This popular carrier has direct flights from San Francisco International Airport to Lambert-St. Louis International Airport.

  • The majority of travellers choose to fly with United Airlines on this route.

  • With 77.78% of its services arriving as planned, United Airlines is the most punctual carrier operating SFO to STL flights.

  • If you'd like to split up your journey, simply uncheck 'Direct flights only' when searching for your ticket from San Francisco International Airport to Lambert-St. Louis International Airport. These are the most popular stopovers between SFO and STL:

    • Denver International Airport

    • Salt Lake City International Airport

    • Eppley Airfield Airport

How to find the cheapest flights from San Francisco International Airport (SFO) to Lambert-St. Louis International Airport (STL)

  • $132 is currently the best price for a one-way San Francisco International Airport to Lambert-St. Louis International Airport flight. Return flights start from $265. These prices can change based on demand and availability.

  • Book six months before your departure date. After crunching the numbers on our calendar, this is how far you'll want to book ahead to find cheap tickets from SFO to STL.

  • May is the cheapest month for flights from San Francisco International Airport to Lambert-St. Louis International Airport. If you need to travel at a different time of year, the 'Whole month' tool will show you the lowest airfares across every month.

  • There's no need to check back in every day to find out if fares have dropped when you set up a Price Alert. We'll let you know the moment there's a better deal on cheap flights from SFO to STL.

  • Discover the right flight for you by using the filters. To see the 'Best,' 'Cheapest' or 'Fastest' flights from San Francisco International Airport to Lambert-St. Louis International Airport, use the 'Sort by' function. You can also filter by airline, arrival and departure times, and number of stops.

Handy information about San Francisco International Airport (SFO)

  • When it comes to San Francisco International Airport's on-time performance, 77.36% of flights stick to their scheduled arrival time.

  • To get to San Francisco International Airport from central San Francisco, it'll take around 20 minutes if you're going by car. This depends on traffic though. It's approximately 21 kilometres from the airport to the city centre.

  • Planning to take public transport? Expect a journey time of around 45 minutes.

  • Booked an early flight from San Francisco International Airport to Lambert-St. Louis International Airport? Avoid the hassle of rushing to the airport (and enjoy a little extra shut-eye) by choosing one of these stays near SFO:

Arriving at Lambert-St. Louis International Airport (STL)

Getting from Lambert-St. Louis International Airport (STL) to central St Louis

  • The street address for STL is 10701 Lambert International Blvd..

  • Lambert-St. Louis International Airport is approximately 26 kilometres from the centre of St Louis. The drive time takes around 20 minutes.

  • If you're using public transport, expect a journey time of roughly 35 minutes.

When to fly to Lambert-St. Louis International Airport (STL)

  • July is the busiest month for flights from San Francisco International Airport to Lambert-St. Louis International Airport. For smaller crowds, visit St Louis in April.

  • Before locking in your flight from San Francisco International Airport to Lambert-St. Louis International Airport, consider the type of weather you enjoy. July is the warmest month in St Louis, with temperatures ranging from 17ºC (63ºF) to 33ºC (91ºF).

  • Search for cheap tickets from SFO to STL in January if you like cooler conditions. Temperatures are at their lowest then, ranging between -8ºC (18ºF) and 7ºC (45ºF) on average.

Explore more of United States

  • Chicago is just one of the many places in United States waiting to be explored after you've experienced St Louis. Around 418 kilometres away to the north-east, its best attractions include Millennium Park, Art Institute of Chicago and LandShark Beer Garden at Navy Pier.

  • Around 370 kilometres east of St Louis, Indianapolis is another favourite stop in United States. Experience major highlights starting with The Children's Museum of Indianapolis, Indianapolis Museum of Art and Indianapolis Zoo.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.