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

You can discover affordable return Delta Air Lines flights from $188 from SAN to DEN by organizing your results from “Price (lowest to highest)” on Expedia. Or search for options from $109 for a one-way trip.**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.

January is one of the least expensive months to jet away to Denver with Delta Air Lines. You could also find great prices on one-way and round-trip fares in November.

To find cheap Delta Air Lines fares from San Diego Intl. Airport (SAN) to Denver Intl. Airport (DEN), start searching one to three months before your planned departure. Reserving domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also affect what you pay. Sunday is usually the cheapest, while Monday is often the most expensive for domestic flights. You can save 6% on average by choosing to book on a Sunday.**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.

Use our “Nonstop” filter when searching for direct Delta Air Lines flights from SAN to DEN. It’s also a good way to compare other airlines servicing the same nonstop route.

Sort your results by “Early Morning” and “Morning” to find the earliest departures from SAN to DEN. Setting off early means flight cancellations are less likely.**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 San Diego Intl. Airport (SAN) to Denver come in to Denver Intl. Airport (DEN). This is the main gateway to this destination.

Jetting off from SAN to DEN with Delta Air Lines means enjoying a host of benefits, including an excellent in-flight experience and a rewarding loyalty program. Plus, when booking through Expedia, One Key™ members can earn OneKeyCash™* to use on select future travel purchases. That’s in addition to the Delta SkyMiles points you can earn with Delta Air Lines.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Changes are typically free within 24 hours of booking, but your airline may charge you after that. For more details about modifying your reservation, go to your “Trips,” select your flight and click on “Manage Booking.” If you want the flexibility to change your itinerary without extra charges, apply the “No cancel fee” or “Changes included” filter when planning your next break.