Roundtrip Denver to San Diego Nonstop Airfares

No special codes or coupons are required. Get these Denver to San Diego nonstop airfares while still available.

These airfares are available for travel on Alaska Airlines, Southwest, and United Airlines. Availability for departure from Denver is from November 17-20, 23-26, 28; December 2-25, 30-31; January 1, 5-31; February 1-15, 17-28; and March 1-11. For departures from San Diego, availability is from November 17-24; December 1-18, 21-26, 30-31; January 2, 5-31; February 1-15, 17-28; and March 1-11.

These are basic economy fares. Alaska Airlines and Southwest allow a personal item and a carry-on bag. United Airlines only allows a personal item. There is no seat selection or changes permitted for these fares. If traveling with children on Alaska or United, you will be seated together according to their policies.

This deal expires on March 31, 2026.