Cheap flights from San Francisco, CA to St. Louis, MO

Flights starting at $68. Choose between United Airlines, Alaska Airlines, or Frontier Airlines to find the best price.

Make your travel wishlist, we'll do the rest
Hidden deals
Effortless booking
Travel hacking

Tips to know when travelling to St. Louis

Mailbox
Receive exclusive deals by email
Travelers usually depart from San Francisco International, San Francisco, CA Train Station, or San Francisco, CA - Fisherman’s Wharf when they travel from San Francisco to St. Louis. The most popular airlines for this route are United Airlines, Alaska Airlines, Frontier Airlines, Spirit Airlines, and JetBlue Airways. San Francisco and St. Louis have 185 direct flights per week.

Check-in for a flight from San Francisco to St. Louis

NameCarrier codeIATA CodePassport needed during bookingOnline check-in available
United AirlinesUALUAYesNo
Alaska AirlinesASAASNoOpens 24 days before flight
Closes 1 hours before flight
Frontier AirlinesFFTF9NoOpens 24 days before flight
Closes 1 hours before flight
Spirit AirlinesNKSNKNoOpens 24 days before flight
Closes 1 hours before flight
JetBlue AirwaysJBUB6NoOpens 24 days before flight
Closes 2 hours before flight

Weather in St. Louis

Average Weather

MonthAverage monthly max temperatureAverage monthly min temperature
January3°C-3°C
February6°C-2°C
March13°C3°C
April18°C8°C
May24°C14°C
June29°C19°C
July31°C21°C
August30°C20°C
September27°C16°C
October20°C10°C
November12°C3°C
December7°C0°C
Hottest Month
31°C
July
Coldest month
-3°C
January
Sunny days
261
days per year
Snow days
9
days per year

14 day forecast

Tuesday
20 Feb
16°C2°C
27 Feb
88%
21°C12°C
Wednesday
21 Feb
18°C7°C
28 Feb
10°C5°C
Thursday
22 Feb
86%
16°C10°C
29 Feb
14°C4°C
Friday
23 Feb
13°C5°C
1 Mar
10°C-1°C
Saturday
24 Feb
12°C4°C
2 Mar
18°C3°C
Sunday
25 Feb
18°C8°C
3 Mar
20°C7°C
Monday
26 Feb
20°C9°C
4 Mar
20°C8°C

Frequently asked questions

What are the most popular routes to and from San Francisco?
What are the most popular routes to and from St. Louis?
What airports are near San Francisco?
What airports are near St. Louis?
Is it possible to combine flights, buses, and trains in one itinerary when traveling between San Francisco and St. Louis?
What is Virtual Interlining and how do I use it?
Which airlines fly between San Francisco and St. Louis?
When's the best time to travel between San Francisco and St. Louis?
What flights operate between San Francisco and St. Louis?
How many airports are there near San Francisco?
How many airports are there near St. Louis?
What time do nonstop (direct) flights between San Francisco and St. Louis depart?
What time do nonstop (direct) flights between San Francisco and St. Louis arrive?
What time do flights between San Francisco and St. Louis depart?
What time do flights between San Francisco and St. Louis arrive?

Explore alternative trips

Flights from San Francisco

Flights to St. Louis

Popular routes

Find the best connection from San Francisco to St. Louis
Search flights, trains & buses
We hack the system,
you fly for less