CA $284 Cheap Alaska Airlines fights from St. Louis (STL) to San Diego (SAN)

View CA $284 flight on Sat, Oct 11, 2025Opens in a new window

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Alaska Airlines flights from St. Louis to San Diego (STL→SAN)

Prices were available within the past 7 days and start at CA $284 for one-way flights and CA $450 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Thu, Nov 13 - Fri, Nov 14
STL
St. Louis
SAN
San Diego
CA $450 Roundtrip, found 5 days ago
CA $450
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Thu, Nov 13 from St. Louis to San Diego, returning Fri, Nov 14, priced at CA $450 found 5 days ago
Alaska Airlines
Fri, Nov 14 - Sun, Nov 16
STL
St. Louis
SAN
San Diego
CA $577 Roundtrip, found 1 day ago
CA $577
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Fri, Nov 14 from St. Louis to San Diego, returning Sun, Nov 16, priced at CA $577 found 1 day ago
Alaska Airlines
Sat, Oct 11 - Sun, Oct 26
STL
St. Louis
SAN
San Diego
CA $584 Roundtrip, found 3 days ago
CA $584
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Sat, Oct 11 from St. Louis to San Diego, returning Sun, Oct 26, priced at CA $584 found 3 days ago
Alaska Airlines
Fri, Nov 14 - Sun, Nov 16
STL
St. Louis
SAN
San Diego
CA $591 Roundtrip, found 1 day ago
CA $591
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Fri, Nov 14 from St. Louis to San Diego, returning Sun, Nov 16, priced at CA $591 found 1 day ago
Flight from St. Louis to San Diego (STL - SAN) route information
Origin airport
Lambert-St. Louis Intl.
Destination airport
San Diego Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Hawaiian Airlines, United
Popular airline
Delta
Distance
2487 km
Average flight time
1 hour 47 mins

Frequently asked questions

How much is an Alaska Airlines flight from Lambert-St. Louis Intl. Airport (STL) to San Diego Intl. Airport (SAN)?
Finding cheap one-way Alaska Airlines flights from STL to SAN from CA $284 on Expedia couldn't be simpler — just filter by "Price (lowest to highest)." Alternatively, check out our budget-friendly round-trip fares from CA $450 for your next exciting vacation.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from STL to SAN with Alaska Airlines?
January is one of the cheapest months to get away to San Diego with Alaska Airlines. You could also find great prices on one-way and return fares in November.
Does Alaska Airlines fly nonstop from Lambert-St. Louis Intl. Airport (STL) to San Diego Intl. Airport (SAN)?
To find out if there's a direct trip from STL to SAN with Alaska Airlines or another airline, select the "Nonstop" filter when browsing for tickets.
What airports does Alaska Airlines fly into in San Diego?
Alaska Airlines flights from Lambert-St. Louis Intl. Airport (STL) to San Diego touch down at San Diego Intl. Airport (SAN). This is the main entry point to this city.
Can I change or cancel my Alaska Airlines flight from Lambert-St. Louis Intl. Airport (STL) to San Diego Intl. Airport (SAN)?
Typically, you can reschedule or cancel your flight, although additional fees may apply if you made your booking over 24 hours ago. Need to keep your options open? Use Expedia's "Changes included" or "No cancel fee" filter to find flights that won't charge you extra if you have to revise your plans. To make changes, visit "Trips," select your flight and click on "Manage Booking" for more details.
*Available to Expedia members.