$109 Cheap Delta flights Denver (DEN) to San Diego (SAN)

Scoring cheap one-way Delta Air Lines flights from DEN to SAN from $109 on Expedia is simple — just filter by “Price (lowest to highest).” Or check out our budget-friendly round-trip fares from $211 for your next adventure.**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.

Delta Air Lines flights to San Diego are often more affordable in the quieter months of January and November. Whether you’re after a return or one-way ticket, you could score a better deal then.

Start searching one to three months ahead of your travel date to find cheap fares on Delta Air Lines 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 reduce costs by buying your fare on a Sunday, as it’s 6% cheaper on average than a Monday, the most expensive day to book.* Time it well, 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.

To see if there’s a direct trip from DEN to SAN with Delta Air Lines or another carrier, select the “Nonstop” filter when searching for flights.

Browse Delta Air Lines’s earliest flights from DEN to SAN by checking the “Morning” and “Early Morning” filters. Not only will you get to your destination sooner, early departures are also 20% less likely to be canceled.**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.

Delta Air Lines flights from Denver Intl. Airport (DEN) to San Diego touch down at San Diego Intl. Airport (SAN). This is the main gateway to this destination.

With a rewarding loyalty program and an excellent in-flight experience, Delta Air Lines is the leading choice for many travelers heading from DEN to SAN. Plus, if you’re a Delta SkyMiles and One Key™ member booking with Expedia, you could earn OneKeyCash™* on eligible flights on top of your airline miles, which can be put toward future getaways.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Depending on the type of ticket you purchased, a fee is typically charged if you modify or cancel your booking more than 24 hours after it’s confirmed. To find flexible fares, select our “No cancel fee” or “Changes included” filter when looking for flights. For additional information on changing or canceling your reservation, visit “Trips,” select your flight and tick “Manage Booking.”