Earn point on your loyalty program!arrow arc left

Cheap flights from St Louis (STL) to San Diego (SAN)

Know your dates, get live prices in seconds
airplane logo

pin logo

calendar
Departure
calendar backward
Return
airplane logo
1 Adults (11+)
0 Children (2~11)
0 Infants (0~2)
Save up to 31%
Book Flight + Hotel at the same time

How to find the cheapest flight from St Louis (STL) to San Diego (SAN)

How to find the cheapest flight from St Louis (STL) to San Diego (SAN)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from St Louis (STL) to San Diego (SAN)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from St Louis (STL) to San Diego (SAN)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.

Cheap flights from St Louis to San Diego in October , November 2026

25 Oct - 18 Nov $ 226.00
STL
St Louis
Frontier Airlines
1 STOPS
SAN
San Diego
SAN
San Diego
Frontier Airlines
1 STOPS
STL
St Louis
Pick dates
25 Oct - 09 Nov $ 254.00
STL
St Louis
Frontier Airlines
1 STOPS
SAN
San Diego
SAN
San Diego
Frontier Airlines
1 STOPS
STL
St Louis
Pick dates
26 Oct - 04 Nov $ 374.00
STL
St Louis
Frontier Airlines
1 STOPS
SAN
San Diego
SAN
San Diego
Frontier Airlines
1 STOPS
STL
St Louis
Pick dates

Last minute flights from St Louis to San Diego

25 Oct - 01 Nov $ 408.00
STL
St Louis
Frontier Airlines
1 STOPS
SAN
San Diego
SAN
San Diego
Frontier Airlines
2 STOPS
STL
St Louis
Pick dates
25 Oct - 01 Nov $ 695.00
STL
St Louis
Alaska Airlines
1 STOPS
SAN
San Diego
SAN
San Diego
Alaska Airlines
1 STOPS
STL
St Louis
Pick dates
26 Oct - 31 Oct $ 5,460.00
STL
St Louis
Alaska Airlines
1 STOPS
SAN
San Diego
SAN
San Diego
Alaska Airlines
1 STOPS
STL
St Louis
Pick dates

One-way flights to San Diego from St Louis

12:16 PM - 6:27 PM
Frontier Airlines
1 Stops
9h 33m
STL - SAN
$ 124
Kiwi
Pick dates
7:42 PM - 2:39 PM
Frontier Airlines
1 Stops
22h 26m
STL - SAN
$ 124
Kiwi
Pick dates
8:00 PM - 10:29 PM
Frontier Airlines
1 Stops
5h 56m
STL - SAN
$ 221
Kiwi
Pick dates

How to find the cheapest flight from St Louis (STL) to San Diego (SAN)

Related info for your journey
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from St Louis (STL) to San Diego (SAN)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from St Louis (STL) to San Diego (SAN)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.