STL - SFO

$94 Find Cheap Flights from St. Louis to San Francisco - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to San Francisco departing on 9/9. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

Save 20% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Everything you should know

Cheapest round-trip
$349
Typical prices: $279-$523
Delta
Wed 9/30Sat 10/3
STL - SFO • 2 stops
Cheapest non-stop
$357
Typical prices: $428-$562
United Airlines
Mon 9/28Thu 10/1
STL - SFO • Non-stop
Advice from real travelers
AI-powered summary based on content written by travel experts. AI can make mistakes.
Southwest free carry-on adds value, but checked bags now cost extra.
United Economy Plus adds up to six inches more legroom than standard economy.
Expert advice
Expert advice
Expert advice
Expert advice
Nonstop flights
You can fly direct with Southwest and United Airlines. Average duration is 4h 15m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Top layover airports
Cheapest • Avg $300 (round-trip)
Shortest trip • 6h 40m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 37% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 17% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to San Francisco!
Flight Deals
Booking Insights
Expert advice
Flight Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to San Francisco that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from St. Louis to San Francisco

Wed, Sep 30 - Sat, Oct 3
Delta Logo
2:25 pm - 11:51 pm
STL
-
SFO
11h 26m
2 stops
Delta Logo
8:59 pm - 10:31 am
SFO
-
STL
11h 32m
2 stops
$349Delta
Wed, Oct 14 - Mon, Oct 19
Alaska Airlines Logo
7:02 am - 6:10 pm
STL
-
SFO
13h 08m
2 stops
Alaska Airlines Logo
11:00 am - 11:59 pm
SFO
-
STL
10h 59m
1 stop
$349Alaska Airlines
Mon, Sep 14 - Thu, Sep 17
Delta Logo
6:55 pm - 11:59 pm
STL
-
SFO
7h 04m
1 stop
Delta Logo
8:59 pm - 8:40 am
SFO
-
STL
9h 41m
2 stops
$350Delta
Tue, Sep 1 - Mon, Sep 7
Frontier Logo
5:27 pm - 11:52 am
STL
-
SFO
44h 25m
2 stops
Frontier Logo
8:56 pm - 5:50 pm
SFO
-
STL
18h 54m
1 stop
$351Frontier
Sat, Aug 22 - Fri, Aug 28
Frontier Logo
6:45 pm - 8:12 am
STL
-
SFO
15h 27m
1 stop
Frontier Logo
8:56 pm - 5:50 pm
SFO
-
STL
18h 54m
1 stop
$351Frontier
Fri, Sep 25 - Tue, Sep 29
Alaska Airlines Logo
6:08 pm - 11:28 pm
STL
-
SFO
7h 20m
1 stop
Alaska Airlines Logo
9:13 pm - 5:10 pm
SFO
-
STL
17h 57m
2 stops
$355Alaska Airlines
Mon, Sep 28 - Thu, Oct 1
United Airlines Logo
7:08 am - 9:30 am
STL
-
SFO
4h 22mnonstop
United Airlines Logo
12:45 pm - 6:43 pm
SFO
-
STL
3h 58mnonstop
$357United Airlines
Wed, Aug 19 - Wed, Aug 26
United Airlines Logo
8:42 am - 11:04 am
STL
-
SFO
4h 22mnonstop
United Airlines Logo
12:40 pm - 6:39 pm
SFO
-
STL
3h 59mnonstop
$357United Airlines
Wed, Jan 6 - Mon, Jan 11
Southwest Logo
8:40 am - 11:05 am
STL
-
SFO
4h 25mnonstop
Southwest Logo
10:35 am - 4:20 pm
SFO
-
STL
3h 45mnonstop
$357Southwest
Sat, Sep 12 - Sat, Sep 19
Southwest Logo
2:15 pm - 4:25 pm
STL
-
SFO
4h 10mnonstop
Southwest Logo
9:25 am - 3:15 pm
SFO
-
STL
3h 50mnonstop
$357Southwest
Booking Insights

KAYAK's insights & trends for St. Louis to San Francisco flights

Get data-powered insights and trends into flights from St. Louis to San Francisco to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from St. Louis to San Francisco?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from St. Louis to San Francisco departing in September.

Flight prices are typical for this route right now.

Flights to San Francisco from St. Louis usually cost between $310 and $552 in September.
The lowest price found in the past 5 days was $349 on Delta (Sep 30-Oct 3).

What’s the cheapest day of the week to fly from St. Louis to San Francisco?

The average price of all round-trip flights from St. Louis to San Francisco clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to San Francisco on a Friday and more expensive on a Saturday. On your return trip to St. Louis, you should consider flying back on a Wednesday, and avoid Sundays for better deals.

What is the cheapest month to fly from St. Louis to San Francisco?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis to San Francisco, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from St. Louis to San Francisco is October, where tickets cost $382 (return) on average. On the other hand, the most expensive months are March and May, where the average cost of round-trip tickets is $543 and $504 respectively.

How far in advance should I book a flight from St. Louis to San Francisco?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from St. Louis to San Francisco, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from St. Louis to San Francisco, you should book around 2 weeks before departure, which saves you about 37% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 8 weeks before departure.

Expert advice

Expert advice for your flight from St. Louis to San Francisco

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on United Airlines

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Blane Bachelor

Blane Bachelor

Expert on Southwest and SFO

Blane Bachelor is a journalist and editor specializing in travel and aviation who writes regularly for top global outlets. Born and raised in Florida, Blane has worked and lived in four countries, including the Netherlands, where she’s currently based with her family. Her favorite way to get to know a new destination is by running or riding a bike around town – or hearing a spooky ghost story about local history. She will always choose the window seat.

Yulia Denisyuk

Yulia Denisyuk

Expert on STL

Yulia is a freelance journalist who’s dispatched from 90+ countries. Her work focuses on cultures, adventure trips and air travel, appearing in NatGeo, NYT, CNTraveler, and more. For past assignments, she’s stayed with nomads in Mongolia and learned the art of Imigongo in Rwanda. She’s based in Chicago; in winter she often questions that decision.

Good to know

Low season

February

Cheapest flight

$94
Best time to beat the crowds but there is an average 4% increase in price.
Most popular time to fly with an average 9% increase in price.
Flight from St. Louis to San Francisco

When to book flights from St. Louis to San Francisco

Are your dates flexible? Find out the best times to travel from St. Louis to San Francisco based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from St. Louis to San Francisco

  • Where can I sleep at San Francisco International Airport (SFO)?

    FreshenUp in the International Terminal provides three nap rooms that passengers can rent by the hour. FreshenUp is landside on level G, next to the airport travel agency. The nap rooms have a bed, desk, mirror, and free Wi-Fi. Showers are also provided but at an additional cost. Grand Hyatt at SFO is a hotel within SFO grounds that offers days rooms and overnight stays. It is connected to the airport via the AirTrain.

  • Does San Francisco International Airport offer family services?

    Nursing rooms have been provided for those traveling with infants at SFO. Nursing rooms are private and lockable and have comfortable seating and power outlets. You’ll find nursing rooms airside in Terminals 1, 2, and 3, with only Terminal 2 providing a landside option. Cloud of Good at SFO is an establishment that offers car seats and strollers for rent. They have three locations at SFO, one in each terminal. SFO has children play areas with interactive exploration areas for the older kids. You’ll find the play area around Gates 22, 54A, 58B, 87A, and 62.

  • Does San Francisco International Airport offer accessible services?

    Yes, SFO is a fully accessible airport. PRM will quickly get through the terminals, with ramps and elevators providing barrier-free access. PRM will also get accessible restrooms, reserved parking spots, dedicated seating, fast track services, and wheelchair assistance from their airlines. Low vision passengers coming through SFO have tactile guide paths, braille-coded elevator buttons, and Aira services to guide them through the airport. SFO has also provided TDD telephones and visual paging for hard-of-hearing passengers.

  • What are the transport options from San Francisco International Airport?

    Trains are the quickest means of getting downtown, and SFO is served by the San Francisco BART, which you can take from the SFO station at the Departures level of the International Terminal. You can also take the BART and connect to CalTrain commuter train services that serve the larger San Francisco area and San Jose. SamTrans provides bus services between SFO and downtown San Francisco. They have three bus routes serving SFO, and you can board these buses from the baggage claim level of Terminals 2 and 3 and level 1 of Courtyard A in the International Terminal.

  • What is the cheapest flight from St. Louis to San Francisco?

    In the last 5 days, the lowest price for a flight from St. Louis to San Francisco was $94 for a one-way ticket and $349 for a round-trip.

  • Do I need a passport to fly between St. Louis and San Francisco?

    No

  • Which airlines offer Wi-Fi service onboard planes from St. Louis to San Francisco?

    JetBlue, Alaska Airlines, American Airlines, and Hawaiian Airlines offer inflight Wi-Fi service on the St. Louis to San Francisco flight route.

  • Which aircraft models fly most regularly from St. Louis to San Francisco?

    The Boeing 737 MAX 8 is the aircraft model that flies most regularly on the St. Louis to San Francisco flight route.

  • Which airline alliances offer flights from St. Louis to San Francisco?

    SkyTeam, oneworld, and Star Alliance are the airline alliances operating flights between St. Louis and San Francisco, with SkyTeam being the most commonly used for this route.

  • On which days can I fly direct from St. Louis to San Francisco?

    There are nonstop flights from St. Louis to San Francisco on a daily basis.

  • Which is the best airline for flights from St. Louis to San Francisco, Southwest or Delta?

    The two airlines most popular with KAYAK users for flights from St. Louis to San Francisco are Southwest and Delta. With an average price for the route of $530 and an overall rating of 8.0, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $379 and an overall rating of 7.8.

  • How does KAYAK find such low prices on flights from St. Louis to San Francisco?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to San Francisco.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to San Francisco?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Francisco from St. Louis is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from St. Louis to San Francisco?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Francisco with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and SFO can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to San Francisco?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Francisco from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from St. Louis to San Francisco

  • Looking for a cheap flight? 25% of our users found flights on this route for $196 or less one-way and $450 or less round-trip.
  • St. Louis Lambert International Airport (STL) has two terminals and five concourses. The airport has provided a free shuttle for inter-terminal transportation that runs every 8-12min.
  • STL welcomes cats, dogs, and all pets. The airport has provided six pet relief areas, including indoors and outdoors. The indoor locations are after security, while the outdoor locations are outside Terminal 2 and the upper west side of Terminal 1.
  • American Airlines is the only airline with a lounge at STL. You must pay at the door and show your flight ticket to access this lounge. The AA lounge is airside between Concourses B and C.
  • US Bank has a full-service branch at STL. The bank offers banking and currency exchange services, and the bank is on the lower level of Terminal 1.
  • Around 920 kg of carbon is emitted on flights from St. Louis to San Francisco. You can fly more sustainably with Frontier Airlines, which offers flights that emit 45% less carbon per passenger.

Prefer to fly direct from St. Louis to San Francisco?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Lambert-St Louis to San Francisco.
Find which airlines fly direct from Lambert-St Louis Airport to San Francisco Airport, which days they fly and book direct flights.

Direct departures

Lambert-St Louis to San Francisco

Monday

Southwest,United Airlines

Southwest,United Airlines

Tuesday

Southwest,United Airlines

Southwest,United Airlines

Wednesday

Southwest,United Airlines

Southwest,United Airlines

Thursday

Southwest,United Airlines

Southwest,United Airlines

Friday

Southwest,United Airlines

Southwest,United Airlines

Saturday

Southwest,United Airlines

Southwest,United Airlines

Sunday

Southwest,United Airlines

Southwest,United Airlines

See more direct flights

Direct returns

San Francisco to Lambert-St Louis

Monday

Southwest,United Airlines

Southwest,United Airlines

Tuesday

Southwest,United Airlines

Southwest,United Airlines

Wednesday

Southwest,United Airlines

Southwest,United Airlines

Thursday

Southwest,United Airlines

Southwest,United Airlines

Friday

Southwest,United Airlines

Southwest,United Airlines

Saturday

Southwest,United Airlines

Southwest,United Airlines

Sunday

Southwest,United Airlines

Southwest,United Airlines

See more direct flights

Everything you need to know for your flight from St. Louis to San Francisco

Information on your arrival and departure airports