$154 Cheap Delta flights Raleigh (RDU) to Philadelphia (PHL)

Use the “Price (lowest to highest)” filter on Expedia to search for cheap Delta Air Lines round-trip flights from $184 from RDU to PHL. Affordable one-way tickets from $154 are available as well.**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 Philadelphia are generally cheaper in the quieter months of January and February. Whether you’re in search of a round-trip or one-way ticket, you could score a better deal then.

Begin your search one to three months ahead of your travel date to get cheaper fares on Delta Air Lines flights from Raleigh - Durham Intl. Airport (RDU) to Philadelphia Intl. Airport (PHL). You can save 25% by booking your domestic flight 34 to 86 days in advance versus 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.* Get the timing right, and you can enjoy significant savings on domestic journeys.*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.

Simply enter your dates, click search and select “Nonstop” on Expedia to find any direct flights from RDU to PHL with Delta Air Lines or other carriers.

Search Delta Air Lines’s earliest flights from RDU to PHL by using the “Early Morning” and “Morning” filters. Not only will you arrive sooner, early departures also have a 20% less chance of being 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 Raleigh - Durham Intl. Airport (RDU) to Philadelphia come in to Philadelphia Intl. Airport (PHL). This is the main entry point to this destination.

Heading from RDU to PHL with Delta Air Lines comes with a variety of perks, including an excellent in-flight experience and a rewarding loyalty program. Plus, when you book through Expedia, One Key™ members can collect OneKeyCash™* to redeem on select future travel purchases. That’s on top of 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.

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