Roundtrip San Diego to Denver Nonstop Airfares

No special codes or coupons are required. Get these roundtrip airfares while travel dates are available.

This deal is for basic economy fares on Southwest, Alaska Airlines, and Expedia. Fares include a personal item and a carry-on bag. There is no seat selection or changes allowed. If traveling with children, you will be seated together per policy.

This offer is available through March 31, 2026.

Travel Availability

• Departs SAN: Oct 15, 18, 21-22, 25, 28-29; Nov 1, 4-5, 8, 11-12, 15, 18-19, 22, 25; Dec 2-3, 6, 9-10, 13, 16-17, 20, 23-24, 30-31; Jan 3, 6-7, 10, 13-14, 17, 20-21, 24, 27-28, 31; Feb 3-4, 7, 10-11, 18, 24-25, 28; March 3-4
• Departs DEN: Oct 15, 18, 21-22, 25, 28-29; Nov 1, 4-5, 8, 11-12, 15, 18-19, 22, 25-26; Dec 2-3, 6, 9-10, 13, 16-17, 23-24, 30-31; Jan 6-7, 10, 13-14, 17, 20-21, 24, 27-28, 31; Feb 3-4, 7, 10-11, 18, 21, 24-25, 28; March 3-4