Fly with Frontier Airlines from Denver to San Diego

Find great value on Frontier Airlines flights from DEN to SAN with CheapOair! Travel the world for less with our DEN to SAN airfare deals and arrive in your destination of choice without compromising style and comfort for price. Enjoy a day out at Balboa Park, the San Diego Zoo or SeaWorld in San Diego. See historic sites for Spanish and Mexican heritage like Old Town San Diego State Historic Park, or participate in modern events including Comic-Con, golf tournaments and film festivals. Relax and get a tan at world-famous beaches, or enjoy craft beer tours throughout the year.

We provide a wide selection of deals that will meet your needs and budget, as well as travel guides and tips like the boarding pass above to help you inform your travel on flights from Denver to San Diego by Frontier Airlines. Book with CheapOair today and save big on your upcoming trip!