$48 Cheap Frontier Airlines flights Denver (DEN) to San Diego (SAN)

You’ll find budget-friendly return Frontier Airlines flights from $91 from DEN to SAN by filtering your results from “Price (lowest to highest)” on Expedia. Or search for bargains from $48 for a one-way journey.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

Search for one-way or round-trip flights to San Diego in January or November. You could find lower fares with Frontier Airlines during these off-peak travel months.

Begin your search one to three months ahead of your travel date to get cheaper fares on Frontier Airlines flights from Denver Intl. Airport (DEN) to San Diego Intl. Airport (SAN). You can save 25% by booking your domestic flight 34 to 86 days in advance compared to last-minute reservations made 6 to 12 days out. You could also cut costs by buying your fare on a Sunday, as it’s 6% cheaper on average than a Monday, the most expensive day to book.* Nail your timing, and you can enjoy significant savings on domestic flights.*Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

Yes, you can fly from Denver Intl. Airport (DEN) to San Diego Intl. Airport (SAN) on one of Frontier Airlines’s 15 weekly direct flights. Use our “Nonstop” and “Airline” filters to find the Frontier Airlines flight that’ll land at SAN at a time that suits you.

Take off from Denver Intl. Airport (DEN) for San Diego Intl. Airport (SAN) on a nonstop Frontier Airlines flight, and you’ll be in the air for approximately 2h 37m.

Friday has the most Frontier Airlines flights from Denver Intl. Airport (DEN) to San Diego Intl. Airport (SAN). With 3 daily departures, this is the best day to find something that will suit your plans.

The first flight from DEN to SAN with Frontier Airlines leaves at 9:22AM UTC-7. You’ll land at 11:01AM UTC-8. The final Frontier Airlines flight of the day leaves at 10:52PM UTC-7 and arrives at 12:29AM UTC-8. With approximately 20% fewer cancellations for morning departures, beginning your travel day early is usually the best choice.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

San Diego Intl. Airport (SAN) is the main San Diego hub for Frontier Airlines flights from Denver Intl. Airport (DEN).

A rewarding loyalty program and the ability to rack up points through Frontier Miles are the start of the reasons to fly from DEN to SAN with Frontier Airlines. Plus, when you join Expedia’s free One Key™ program, you can receive OneKeyCash™* alongside any airline loyalty program earnings. It’s yours to spend on future travel plans.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

For the Denver Intl. Airport (DEN) to San Diego Intl. Airport (SAN) route, Frontier Airlines typically operates Airbus A321neo and Airbus A320neo planes. Don’t forget that last-minute changes can occur for operational purposes, so your flight could be on a different aircraft.

It’s generally possible to cancel or modify your flight, although there may be a charge if you made your booking more than 24 hours ago. Need to keep your options open? Use our “Changes included” and “No cancel fee” filters to find flights that won’t charge extra if you need to revise your plans. To update your booking, go to “Trips,” select your flight and click on “Manage Booking” for more details.