฿5,090 Cheap Delta flights from St. Louis to San Diego (STL→SAN)

View ฿5,090 flight on Thu, 29 Jan 2026Opens in a new window
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Delta flights from St. Louis to San Diego (STL→SAN)

Prices were available within the past 7 days and start at ฿5,090 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Find the cheapest month to fly from St. Louis (STL) to San Diego (SAN)

January is typically the cheapest month to fly

From ฿4,418 - ฿12,520 per traveller.
Flight from St. Louis to San Diego route information
Origin airport
Lambert-St. Louis Intl.
Destination airport
San Diego Intl.
Distance
2487 km
Average flight time
3 hours 30 mins

Frequently asked questions

How much is a Delta Air Lines flight from Lambert-St. Louis Intl. Airport (STL) to San Diego Intl. Airport (SAN)?
Landing cheap one-way Delta Air Lines flights from STL to SAN from ฿5,090 on Expedia is simple — just filter by "Price (lowest to highest)." Or check out our affordable return fares for your next getaway.**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 Delta Air Lines?
January is one of the most affordable months to fly to San Diego with Delta Air Lines. You could also find great deals on return and one-way fares in November.
Does Delta Air Lines fly nonstop from Lambert-St. Louis Intl. Airport (STL) to San Diego Intl. Airport (SAN)?
Fill in your dates, hit search and check "Nonstop" on Expedia to browse any direct flights from STL to SAN with Delta Air Lines or another airline.
What airports does Delta Air Lines fly into in San Diego?
Delta Air Lines flights from Lambert-St. Louis Intl. Airport (STL) to San Diego land at San Diego Intl. Airport (SAN). This is the main gateway here.
Can I change or cancel my Delta Air Lines flight from Lambert-St. Louis Intl. Airport (STL) to San Diego Intl. Airport (SAN)?
Changes are usually free within 24 hours of booking, but your airline may add a charge after that. For more information about modifying your flights, go to your "Trips," select your flight and click on "Manage Booking." If you'd like the flexibility to change your itinerary without additional charges, tick the "Changes included" and "No cancel fee" filters when organising your trip.
*Available to Expedia members.