Direct flights from St Louis to San Diego

Did you mean Flights from San Diego to St Louis?

St Louis

United States

STL

Lambert St Louis International Airport

San Diego

United States

SAN

San Diego International Airport

Route: Nonstop service available
Distance: 1,554 miles
Marketing airlines: 3 airlines
Aircraft: 6 aircraft types
Dates: Oct 19, 2026 – Oct 8, 2027

Observed award fares

A sample of one-way prices for one traveler from Roame’s fare cache. Points, fees, and seats describe the same observation. Availability can change; confirm with the loyalty program before transferring points.

Departure window: 2026-10-23 – 2026-11-21.

No recent fares appear in this limited preview. This does not mean the route is sold out. Use the search controls to check other dates and routes.

St Louis to San Diego route overview

Lambert St Louis International Airport (STL) serves St Louis; San Diego International Airport (SAN) serves San Diego.

The airports are 1,554 miles apart by great-circle distance.

Roame's current schedule feed shows nonstop service from STL to SAN.

Marketing airlines listed in the current schedule, including codeshare sellers, are Sun Country (SY), United Airlines (UA) and Southwest Airlines (WN). This list does not identify the operating airline for each flight; check the flight details before booking.

Published schedule dates span Oct 19, 2026 – Oct 8, 2027.

Marketing airlines on the St Louis to San Diego route

These are marketing airlines, including codeshare sellers. This list does not identify the operating airline for each flight; check the flight details before booking.

Airline alliance affiliations represented: Star Alliance

Aircraft flying from STL to SAN

Frequently asked questions

Which airports serve the St Louis to San Diego route?

Lambert St Louis International Airport (STL) is the origin airport and San Diego International Airport (SAN) is the destination airport.

How far is San Diego from St Louis?

STL and SAN are approximately 1,554 miles apart by great-circle distance.

Are there direct flights from STL to SAN?

Yes. Roame's current schedule feed shows nonstop service from STL to SAN.

Which airlines market flights from STL to SAN?

Which aircraft fly from STL to SAN?

Aircraft listed in the current schedule include Airbus A319 (319), Airbus A320 (320), Boeing 737-800 (738), Boeing 737-800 Winglets (73H), Boeing 737 MAX 8 (7M8) and 7S7.