Cheap Flights from St Louis to San Francisco International

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Flight deals from St Louis to San Francisco International

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

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

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

Direct flights from St Louis to San Francisco International

St Louis to San Francisco International: Alternative routes

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

St Louis to San Francisco: Flight information

The things to know before you go.
Cheapest flight foundRs33,333
Cheapest month to flySeptember
Average flight time4 hrs, 26 mins
Most popular airlineUnited
Average flights per week32

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

The best price we found for a return flight from St Louis to San Francisco International is Rs66,701. 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.
4 hours and 26 minutes is the average flight time from St Louis to San Francisco International.
United, Southwest Airlines and Air New Zealand fly direct from St Louis to San Francisco International.
As of July 2025, there are 32 flights per week flying from St Louis to San Francisco International.
The cheapest month to fly from St Louis to San Francisco International is usually August.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from St Louis Airport to San Francisco International Airport on Friday, 29 August 2025.
Yes – the average flight time is 4 hours and 26 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 San Francisco International 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 San Francisco is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Frontier Airlines and United offer the cheapest flight tickets to San Francisco International.

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

  • The average time for a direct flight from Lambert-St. Louis International Airport to San Francisco International Airport is 4 hours 20 minutes.

  • The timezone in San Francisco is UTC-7, which is two hours behind St Louis.

  • Flights from STL to SFO start at 07:00 — the first with United Airlines. The latest departure is at 19:30 with Southwest Airlines. In total, you can take your pick of 22 weekly Lambert-St. Louis International Airport to San Francisco International Airport flights.

  • Give yourself enough time to make your STL to SFO flight. A good rule of thumb is to arrive two hours before international departures and an hour ahead for domestic flights.

  • During popular months such as July, you'll want to get to the airport earlier than normal. Plan to arrive two hours before a domestic departure and four hours ahead of international flights whenever you're travelling during a high season in general.

  • United Airlines has direct flights from Lambert-St. Louis International Airport to San Francisco International Airport. Book with this popular airline, then get ready to see the sights in San Francisco — and maybe even more of United States if time allows.

  • The airline most travellers prefer to fly with on this route is United Airlines.

  • With 79.45% of services landing as planned, United Airlines is the most punctual carrier offering STL to SFO flights.

  • We make it easy to book a flight with a stopover. To see all your options for tickets from Lambert-St. Louis International Airport to San Francisco International Airport, uncheck 'Direct flights only.' Then, pick a flight that has a stop long enough to visit the city of your choice. Top stopovers between STL and SFO include:

    • Denver International Airport

    • Harry Reid Airport (formerly McCarran Airport)

    • Los Angeles International Airport

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

  • Rs33,333 is currently the lowest price for a one-way Lambert-St. Louis International Airport to San Francisco International Airport flight. Return flights start at Rs66,745. These fares can change depending on availability and demand.

  • Book five 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 STL to SFO.

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

  • Spend less time searching for cheap flights from STL to SFO by creating a Price Alert. You'll get an email or push notification on the app when fares go down.

  • Tailor your trip using filters. Pick your ideal departure and arrival times, total journey duration and airlines. You can also sort your results by 'Best,' 'Cheapest' or 'Fastest' flights from Lambert-St. Louis International Airport to San Francisco International Airport.

Handy information about Lambert-St. Louis International Airport (STL)

  • STL's address is 10701 Lambert International Blvd..

  • When it comes to the on-time performance of Lambert-St. Louis International Airport, data shows 78.04% of flights complete their journey on time.

  • Central St Louis to Lambert-St. Louis International Airport is approximately 26 kilometres. Depending on traffic, it'll take you about 20 minutes to get there if you're driving, catching a cab or ride-sharing.

  • Planning to catch public transport? Expect a journey time of around 35 minutes.

  • Catching an early flight from Lambert-St. Louis International Airport to San Francisco International Airport? Avoid the stress of rushing to the airport (and catch some extra z's) by choosing one of these stays near STL:

Arriving at San Francisco International Airport (SFO)

Getting from San Francisco International Airport (SFO) to central San Francisco

  • From San Francisco International Airport, San Francisco is approximately 21 kilometres away. It takes around 20 minutes to drive to the centre.

  • Getting there on public transport will take you roughly 45 minutes.

When to fly to San Francisco International Airport (SFO)

  • August is the most popular month for flights from Lambert-St. Louis International Airport to San Francisco International Airport. For a quieter experience, visit San Francisco in February.

  • Lock in your flight from Lambert-St. Louis International Airport to San Francisco International Airport for September if you want to explore San Francisco during its warmest month. You can expect temperatures of between 12ºC and 22ºC.

  • For cooler conditions, look for a cheap ticket from STL to SFO in January. Temperatures average between 6ºC and 16ºC then.

Explore more of United States

  • San Francisco is easy to fall in love with, but there are so many other corners of United States waiting to be discovered. About 64 kilometres south-east of San Francisco, a trip to San Jose will keep you on the go. Start with leading sights like Winchester Mystery House, Rosicrucian Egyptian Museum and San Jose Museum of Art.

  • If you're interested in discovering another great destination in United States, consider Fresno, roughly 257 kilometres south-east of San Francisco. Forestiere Underground Gardens, Fresno Chaffee Zoo and Shinzen Japanese Garden are among its highlights.

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