Terminals · SAN
Southwest departs from Terminal 1 at San Diego International Airport (SAN). We verified this against the airport's own sources on June 27, 2026 — airlines do move terminals, so we date every check.

Southwest departs from Terminal 1 at San Diego International Airport (SAN). New Terminal 1 (100-series gates); baggage at Ground Level T1, Carousel 2. Verified June 27, 2026.
Terminal 1 ticketing hall. Bag drop usually closes 45 minutes before departure, so build that into your morning.
Now operating in the new Terminal 1 building that opened Sep 23, 2025 (Southwest was the first carrier to use the new T1); previously in the original Terminal 1. We confirmed Southwest's current Terminal 1 on June 27, 2026.
Not sure which building that is? See all SAN terminals with the airport map and how to get between them. Then let your Leave-By Time count backward from your flight — today's SAN security wait, your drive, and the walk to your gate — so you leave with room to breathe.