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

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

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Tips to know when travelling to San Diego

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Book your trip to arrive at San Diego International, San Diego, CA - La Jolla, San Diego, CA - Old Town, San Diego, CA - Seaport Village, or San Diego-SDSU Transit Center. The most popular airlines for this route are Frontier Airlines, United Airlines, Alaska Airlines, Spirit Airlines, and JetBlue Airways. St. Louis and San Diego have 213 direct flights per week.

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

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

Average Weather

MonthAverage monthly max temperatureAverage monthly min temperature
January18°C10°C
February17°C10°C
March18°C11°C
April19°C12°C
May20°C14°C
June22°C16°C
July24°C18°C
August25°C19°C
September25°C19°C
October23°C16°C
November21°C13°C
December17°C11°C
Hottest Month
25°C
August
Coldest month
10°C
February
Sunny days
344
days per year

14 day forecast

Sunday
25 Feb
18°C15°C
3 Mar
88%
14°C11°C
Monday
26 Feb
85%
17°C14°C
4 Mar
17°C10°C
Tuesday
27 Feb
88%
17°C14°C
5 Mar
17°C11°C
Wednesday
28 Feb
18°C13°C
6 Mar
16°C12°C
Thursday
29 Feb
18°C13°C
7 Mar
16°C12°C
Friday
1 Mar
84%
16°C14°C
8 Mar
16°C12°C
Saturday
2 Mar
85%
16°C12°C
9 Mar
16°C13°C

Frequently asked questions

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