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

Finding cheap one-way Delta Air Lines flights from DEN to PHL from $129 on Expedia is a cinch — just filter by “Price (lowest to highest).” Alternatively, check out our affordable return fares from $251 for your next exciting 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.

Search for round-trip or one-way flights to Philadelphia in January or February. You could find an affordable fare with Delta Air Lines during these off-peak months.

Search for affordable Delta Air Lines flights from Denver Intl. Airport (DEN) to Philadelphia Intl. Airport (PHL) one to three months before your departure date. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. No matter the fare type and itinerary, the best day to book a domestic flight is generally Sunday and the most expensive is typically Monday. Passengers who book on a Sunday can save 6% on average compared to those who book their travel on a Monday.**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 use the “Nonstop” filter on Expedia to find any direct flights from DEN to PHL with Delta Air Lines or other airlines.

Find Delta Air Lines’s earliest flights from DEN to PHL by using our “Early Morning” and “Morning” filters. Not only will you get to where you’re going sooner, early departures also experience 20% fewer 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.

Get on a Delta Air Lines flight from Denver Intl. Airport (DEN) to Philadelphia, and you’ll most likely come in to Philadelphia Intl. Airport (PHL). 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 top choice for many passengers flying from DEN to PHL. 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 can be used on future travel.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

In most cases, you can cancel or modify your flight, although additional fees may apply if your booking was made more than 24 hours ago. Want to keep your options open? Make use of our “No cancel fee” and “Changes included” filters to find flights that won’t charge extra if you need to revise your plans. To modify your booking, go to “Trips,” select your flight and click on “Manage Booking” for more details.