$129 Cheap Delta flights Philadelphia (PHL) to Denver (DEN)

Make use of the “Price (lowest to highest)” filter on Expedia to find cheap Delta Air Lines round-trip flights from $212 from PHL to DEN. Affordable one-way options from $129 are available too.**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 cheapest months to fly to Denver with Delta Air Lines. You could also find excellent prices on one-way and round-trip tickets in November.

To find cheap Delta Air Lines fares from Philadelphia Intl. Airport (PHL) 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 influence the cost. Sunday is generally the cheapest, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking 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.

Fill in your dates, press search and tick the “Nonstop” filter on Expedia to find any direct flights from PHL to DEN with Delta Air Lines or another airline.

Sort your results by “Morning” and “Early Morning” to browse the earliest flights from PHL to DEN. Heading off early means you’re 20% less likely to experience cancellations.**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.

Catch a Delta Air Lines flight from Philadelphia Intl. Airport (PHL) to Denver, and you’ll likely come in to Denver Intl. Airport (DEN). This is the airline’s primary hub in this city.

Offering an excellent in-flight experience and a rewarding loyalty program, Delta Air Lines is a popular option for many passengers flying from PHL to DEN. What’s more, 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 you can put toward future getaways.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Changes are often free within 24 hours of making your booking, but your airline may charge a fee after that. For more information about modifying your flights, go to your “Trips,” select your flight and click on “Manage Booking.” If you’d like the freedom to change your itinerary without being charged, check the “Changes included” and “No cancel fee” filters when planning your next break.