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117 € Cheap Flights from Washington Dulles to Philadelphia

Compare Washington Dulles to Philadelphia flight deals

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Flight deals from Washington Dulles to Philadelphia

Looking for a cheap last-minute deal or the best return flight from Washington Dulles Airport to Philadelphia? If you want to travel next month, return fares start from 117 €. Find the lowest prices on one-way and return tickets right here.
Philadelphia.117 € per passenger.Departing Wed, 26 Aug, returning Sat, 29 Aug.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Washington Dulles on Wed, 26 Aug, arriving in Philadelphia International.Inbound indirect flight with Frontier Airlines, departs from Philadelphia International on Sat, 29 Aug, arriving in Washington Dulles.Price includes taxes and charges.From 117 €, select.
Philadelphia.124 € per passenger.Departing Mon, 31 Aug, returning Tue, 1 Sep.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Washington Dulles on Mon, 31 Aug, arriving in Philadelphia International.Inbound indirect flight with Frontier Airlines, departs from Philadelphia International on Tue, 1 Sep, arriving in Washington Dulles.Price includes taxes and charges.From 124 €, select.
Philadelphia.136 € per passenger.Departing Wed, 2 Sep, returning Thu, 3 Sep.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Washington Dulles on Wed, 2 Sep, arriving in Philadelphia International.Inbound indirect flight with Frontier Airlines, departs from Philadelphia International on Thu, 3 Sep, arriving in Washington Dulles.Price includes taxes and charges.From 136 €, select.
Philadelphia.173 € per passenger.Departing Tue, 20 Oct, returning Thu, 22 Oct.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Washington Dulles on Tue, 20 Oct, arriving in Philadelphia International.Inbound indirect flight with Frontier Airlines, departs from Philadelphia International on Thu, 22 Oct, arriving in Washington Dulles.Price includes taxes and charges.From 173 €, select.
Philadelphia.209 € per passenger.Departing Mon, 27 Jul, returning Mon, 3 Aug.Return flight with United.Outbound direct flight with United departs from Washington Dulles on Mon, 27 Jul, arriving in Philadelphia International.Inbound direct flight with United departs from Philadelphia International on Mon, 3 Aug, arriving in Washington Dulles.Price includes taxes and charges.From 209 €, select.
Philadelphia.209 € per passenger.Departing Sat, 23 Jan, returning Sat, 30 Jan.Return flight with United.Outbound direct flight with United departs from Washington Dulles on Sat, 23 Jan, arriving in Philadelphia International.Inbound direct flight with United departs from Philadelphia International on Sat, 30 Jan, arriving in Washington Dulles.Price includes taxes and charges.From 209 €, select.
Philadelphia.209 € per passenger.Departing Wed, 23 Dec, returning Wed, 30 Dec.Return flight with United.Outbound direct flight with United departs from Washington Dulles on Wed, 23 Dec, arriving in Philadelphia International.Inbound direct flight with United departs from Philadelphia International on Wed, 30 Dec, arriving in Washington Dulles.Price includes taxes and charges.From 209 €, select.
Philadelphia.209 € per passenger.Departing Fri, 23 Oct, returning Fri, 30 Oct.Return flight with United.Outbound direct flight with United departs from Washington Dulles on Fri, 23 Oct, arriving in Philadelphia International.Inbound direct flight with United departs from Philadelphia International on Fri, 30 Oct, arriving in Washington Dulles.Price includes taxes and charges.From 209 €, select.
Philadelphia.209 € per passenger.Departing Thu, 31 Dec, returning Thu, 14 Jan.Return flight with United.Outbound direct flight with United departs from Washington Dulles on Thu, 31 Dec, arriving in Philadelphia International.Inbound direct flight with United departs from Philadelphia International on Thu, 14 Jan, arriving in Washington Dulles.Price includes taxes and charges.From 209 €, select.
Philadelphia.209 € per passenger.Departing Tue, 23 Mar, returning Tue, 30 Mar.Return flight with United.Outbound direct flight with United departs from Washington Dulles on Tue, 23 Mar, arriving in Philadelphia International.Inbound direct flight with United departs from Philadelphia International on Tue, 30 Mar, arriving in Washington Dulles.Price includes taxes and charges.From 209 €, select.
Philadelphia.209 € per passenger.Departing Wed, 23 Sep, returning Wed, 30 Sep.Return flight with United.Outbound direct flight with United departs from Washington Dulles on Wed, 23 Sep, arriving in Philadelphia International.Inbound direct flight with United departs from Philadelphia International on Wed, 30 Sep, arriving in Washington Dulles.Price includes taxes and charges.From 209 €, select.
Philadelphia.209 € per passenger.Departing Wed, 19 Aug, returning Wed, 26 Aug.Return flight with United.Outbound direct flight with United departs from Washington Dulles on Wed, 19 Aug, arriving in Philadelphia International.Inbound direct flight with United departs from Philadelphia International on Wed, 26 Aug, arriving in Washington Dulles.Price includes taxes and charges.From 209 €, select.
Philadelphia.209 € per passenger.Departing Tue, 23 Feb, returning Tue, 2 Mar.Return flight with United.Outbound direct flight with United departs from Washington Dulles on Tue, 23 Feb, arriving in Philadelphia International.Inbound direct flight with United departs from Philadelphia International on Tue, 2 Mar, arriving in Washington Dulles.Price includes taxes and charges.From 209 €, select.
Philadelphia.235 € per passenger.Departing Wed, 22 Jul, returning Sat, 25 Jul.Return flight with United.Outbound direct flight with United departs from Washington Dulles on Wed, 22 Jul, arriving in Philadelphia International.Inbound direct flight with United departs from Philadelphia International on Sat, 25 Jul, arriving in Washington Dulles.Price includes taxes and charges.From 235 €, select.
Philadelphia.246 € per passenger.Departing Fri, 25 Sep, returning Sat, 10 Oct.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Washington Dulles on Fri, 25 Sep, arriving in Philadelphia International.Inbound indirect flight with Frontier Airlines, departs from Philadelphia International on Sat, 10 Oct, arriving in Washington Dulles.Price includes taxes and charges.From 246 €, select.
Philadelphia.263 € per passenger.Departing Fri, 23 Oct, returning Sun, 8 Nov.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Washington Dulles on Fri, 23 Oct, arriving in Philadelphia International.Inbound indirect flight with Frontier Airlines, departs from Philadelphia International on Sun, 8 Nov, arriving in Washington Dulles.Price includes taxes and charges.From 263 €, select.

Find the cheapest month to fly from Washington Dulles to Philadelphia

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Washington Dulles to Philadelphia flights are currently cheapest in August.
Jul
from 235 €
Aug
from 117 €
Sep
from 136 €
Oct
from 173 €
Nov
from 271 €
Dec
from 209 €
Jan
from 209 €
Feb
Find prices
Mar
from 209 €
Apr
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May
Find prices
Jun
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Direct flights from Washington Dulles to Philadelphia

Alternative Washington Dulles to Philadelphia routes

Looking for the cheapest, fastest or easiest route from Washington Dulles to Philadelphia? You could fly into the following airports instead.

Philadelphia International

11km from central Philadelphia
ClosestCheapest
from 117 €
Search flights

Philadelphia Trenton-Mercer

47km from central Philadelphia
from 265 €
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Greater Wilmington

49km from central Philadelphia
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Atlantic City International

75km from central Philadelphia
from 210 €
Search flights

Allentown

81km from central Philadelphia
from 283 €
Search flights

Washington D.C. to Philadelphia: Flight information

The things to know before you go.
Cheapest flight found117 €
Cheapest month to flyAugust
Average flight time1 hr, 14 mins
Most popular airlineUnited
Average flights per week115

Finding cheap flights from Washington Dulles to Philadelphia: Frequently asked questions

There are 5 airports in Philadelphia: Philadelphia International, Philadelphia Trenton-Mercer, Greater Wilmington, Atlantic City International, and Allentown.
The best price we found for a return flight from Washington Dulles to Philadelphia is 117 €. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
1 hour and 14 minutes is the average flight time from Washington Dulles to Philadelphia.
United, GoJet Airlines and Mesa Airlines fly direct from Washington Dulles to Philadelphia.
As of July 2026, there are 115 flights per week flying from Washington Dulles to Philadelphia.
The cheapest month to fly from Washington Dulles to Philadelphia is usually August.
If you're flying from Washington Dulles Airport, the cheapest airport near Philadelphia is Philadelphia International – which is 11.2 km away from the centre of Philadelphia. We've found flights into this airport from 117 €.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Washington Dulles Airport to Philadelphia on Wednesday, 26 August 2026.
Yes – the average flight time is 1 hour and 14 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Philadelphia but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Philadelphia is around 40 days in advance, so don’t leave your flight to the last minute.

In July, the average temperature is usually around 24°C. July is typically the warmest month in Philadelphia, when it usually averages around 30°C. You can expect the least rain in February. The coldest month is January, with temperatures averaging -5°C. The rainiest month is July.
Currently, Frontier Airlines and United offer the cheapest flight tickets to Philadelphia.

Flying from Washington Dulles International Airport (IAD) to Philadelphia: what you need to know

  • Expect to be travelling for 1 hour 10 minutes. That's the average duration of a direct flight from Washington Dulles International Airport to Philadelphia.

  • Philadelphia and Washington DC (where Washington Dulles International Airport is located) are both in the UTC-5 timezone. This means there's no time difference to consider.

  • Washington Dulles International Airport (IAD) to Philadelphia International Airport (PHL) is the most traveled route, with 22 weekly flights to pick from. If you prefer starting your day later, the last flight from IAD to PHL is with United Airlines at 22:15. Opt for the first departure operated by United Airlines at 08:15 if you want to fly out earlier.

  • For a smooth journey, arrive at the airport two hours ahead of international flights and one hour before domestic departures. This will give you plenty of time to board your IAD to Philadelphia flight.

  • You can expect longer lines during popular months like June. Arriving up to four hours in advance for an international flight and two hours for domestic departures is a smart move.

  • Direct Washington Dulles International Airport to Philadelphia tickets are available for booking. Philadelphia International Airport (PHL) will be your arrival point.

  • United Airlines is a leading airline that operates direct flights from Washington Dulles International Airport to Philadelphia.

  • The journey from central Washington DC to IAD takes around 1 hour 10 minutes on public transport. If you drive, ride-share or take a taxi, you'll cover the 40 kilometres in 45 minutes or so, depending on traffic conditions.

  • Planning to catch an early flight from Washington Dulles International Airport to Philadelphia? Avoid the hassle of rushing to the terminal (and enjoy a little extra shut-eye) by choosing one of these hotels near IAD:

  • When it comes to the on-time performance of Washington Dulles International Airport, data shows 77% of flights stick to their scheduled arrival time.

  • IAD's address is 1 Saarinen Circle.

How to find the cheapest flights from Washington Dulles International Airport (IAD) to Philadelphia

  • 64 € is the lowest price we've found for a one-way Washington Dulles International Airport to Philadelphia flight. A round-trip plane ticket right now is 117 €. Depending on the availability when you book, these fares may change.

  • To pick up cheap flights from IAD to Philadelphia, book early. Airlines typically offer lower fares when tickets first go on sale.

  • The 'Whole month' tool will show you the cheapest tickets from Washington Dulles International Airport to Philadelphia across every month. It's a great way to snap up a bargain if your travel plans aren't set in stone.

  • You don't need to keep checking in to find out if fares have dropped when you create a Price Alert. We'll let you know as soon as there's an extra saving on cheap flights from IAD to Philadelphia.

  • Tailor your flights with filters. Select your ideal departure and arrival times, total journey duration and airlines. You can also sort results by 'Fastest,' 'Cheapest' or 'Best' flights from Washington Dulles International Airport to Philadelphia.

Airports in Philadelphia

Philadelphia International Airport (PHL)

  • Philadelphia International Airport (PHL) is around 18 kilometres from central Philadelphia. If you're grabbing a taxi or a ride-share, the drive will take roughly 20 minutes.

  • Travelling by public transport will take you around 30 minutes.

  • The last thing you want is a lengthy journey to your hotel if you're landing late on a flight from Washington Dulles International Airport to Philadelphia. Book one of these accommodation options near PHL instead:

  • Reserving your vehicle from Philadelphia International Airport around three weeks ahead of your flight from IAD to Philadelphia can help you lock in the lowest rate.

  • The street address for PHL is 8500 Essington Ave.

Trenton-Mercer Airport (TTN)

  • The centre of Philadelphia is about 48 kilometres from Trenton-Mercer Airport (TTN). Once your flight from Washington Dulles International Airport to Philadelphia has touched down and you've navigated your way to arrivals, the drive should take about 40 minutes.

  • If you travel by public transport, you'll get to the city centre in 1 hour 35 minutes or so.

  • There are some comfortable places to park your luggage (and yourself) near TTN. Kick back and get cosy after your IAD to Philadelphia flight at any of these perfectly located options:

  • Get exactly what you want. Reserving your ride from TTN four weeks in advance often means lower prices and a greater selection of vehicles.

  • You'll find Trenton-Mercer Airport at Scotch Road, Terminal Building.

Best time to go to Philadelphia

  • July is the most popular month for flights from Washington Dulles International Airport to Philadelphia. To escape the crowds, head to Philadelphia in December.

  • Lock in a Washington Dulles International Airport to Philadelphia plane ticket with a departure in July if you're eager to visit the city during its warmest month. You can expect temperatures to range from 18ºC (64ºF) to 32ºC (90ºF).

  • Look for cheap tickets from IAD to Philadelphia in January if you want to travel in cooler conditions. Temperatures are at their lowest then, ranging between -7ºC (19ºF) and 9ºC (48ºF) on average.

More about Philadelphia

Explore more of the United States

  • You've seen Philadelphia, now it's time to explore other corners of the United States. Journey around 129 kilometres northeast to New York to tick off its leading attractions. From Central Park to Statue of Liberty and Metropolitan Museum of Art, you've got a jam-packed schedule ahead.

  • Around 434 kilometres northeast of Philadelphia, Boston is another favourite stop in the United States. Experience the best of this destination with a visit to Museum of Fine Arts Boston, Freedom Trail and USS Constitution Museum.

Plan the rest of your trip from Washington D.C. to Philadelphia

Prices shown on this page are estimated lowest prices only. Found in the last 12 days.