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

Flights starting at $44. Choose between Frontier Airlines, Alaska Airlines, or United Airlines to find the best price.

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Tips to know when travelling to St. Louis

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Travelers usually depart from San Diego International, or McClellan–Palomar when they travel from San Diego to St. Louis. The most popular airlines for this route are Frontier Airlines, Alaska Airlines, United Airlines, Spirit Airlines, and JetBlue Airways. San Diego and St. Louis have 216 direct flights per week.

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

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

Thursday
18 Apr
96%
29°C12°C
25 Apr
14°C6°C
Friday
19 Apr
17°C8°C
26 Apr
87%
20°C11°C
Saturday
20 Apr
15°C7°C
27 Apr
20°C12°C
Sunday
21 Apr
16°C5°C
28 Apr
84%
24°C12°C
Monday
22 Apr
20°C6°C
29 Apr
31°C20°C
Tuesday
23 Apr
79%
13°C12°C
30 Apr
25°C17°C
Wednesday
24 Apr
16°C6°C
1 May
23°C13°C

Frequently asked questions

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

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