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Cheap Flights from Washington Dulles to Philadelphia International

Compare Washington Dulles to Philadelphia International flight deals

Find the cheapest month or even day of the year to fly to Philadelphia International

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Flight deals from Washington Dulles to Philadelphia International

Looking for a cheap last-minute deal or the best return flight from Washington Dulles to Philadelphia International? Find the lowest prices on one-way and return tickets right here.
Philadelphia.166 € per passenger.Departing Fri, 25 Jul, returning Tue, 29 Jul.Return flight with United.Outbound direct flight with United departs from Washington Dulles on Fri, 25 Jul, arriving in Philadelphia International.Inbound direct flight with United departs from Philadelphia International on Tue, 29 Jul, arriving in Washington Dulles.Price includes taxes and charges.From 166 €, select.
Philadelphia.203 € per passenger.Departing Thu, 9 Oct, returning Thu, 16 Oct.Return flight with United.Outbound direct flight with United departs from Washington Dulles on Thu, 9 Oct, arriving in Philadelphia International.Inbound direct flight with United departs from Philadelphia International on Thu, 16 Oct, arriving in Washington Dulles.Price includes taxes and charges.From 203 €, select.
Philadelphia.204 € per passenger.Departing Sat, 13 Sep, returning Thu, 18 Sep.Return flight with United.Outbound direct flight with United departs from Washington Dulles on Sat, 13 Sep, arriving in Philadelphia International.Inbound direct flight with United departs from Philadelphia International on Thu, 18 Sep, arriving in Washington Dulles.Price includes taxes and charges.From 204 €, select.
Philadelphia.205 € per passenger.Departing Thu, 7 Aug, returning Mon, 11 Aug.Return flight with United.Outbound direct flight with United departs from Washington Dulles on Thu, 7 Aug, arriving in Philadelphia International.Inbound direct flight with United departs from Philadelphia International on Mon, 11 Aug, arriving in Washington Dulles.Price includes taxes and charges.From 205 €, select.
Philadelphia.205 € per passenger.Departing Thu, 5 Feb, returning Tue, 17 Feb.Return flight with United.Outbound direct flight with United departs from Washington Dulles on Thu, 5 Feb, arriving in Philadelphia International.Inbound direct flight with United departs from Philadelphia International on Tue, 17 Feb, arriving in Washington Dulles.Price includes taxes and charges.From 205 €, select.
Philadelphia.228 € per passenger.Departing Sun, 29 Mar, returning Tue, 7 Apr.Return flight with United.Outbound direct flight with United departs from Washington Dulles on Sun, 29 Mar, arriving in Philadelphia International.Inbound direct flight with United departs from Philadelphia International on Tue, 7 Apr, arriving in Washington Dulles.Price includes taxes and charges.From 228 €, select.
Philadelphia.237 € per passenger.Departing Tue, 29 Jul, returning Sat, 2 Aug.Return flight with United.Outbound direct flight with United departs from Washington Dulles on Tue, 29 Jul, arriving in Philadelphia International.Inbound direct flight with United departs from Philadelphia International on Sat, 2 Aug, arriving in Washington Dulles.Price includes taxes and charges.From 237 €, select.
Philadelphia.239 € per passenger.Departing Mon, 25 Aug, returning Mon, 1 Sep.Return flight with United.Outbound direct flight with United departs from Washington Dulles on Mon, 25 Aug, arriving in Philadelphia International.Inbound direct flight with United departs from Philadelphia International on Mon, 1 Sep, arriving in Washington Dulles.Price includes taxes and charges.From 239 €, select.

Find the cheapest month to fly from Washington Dulles to Philadelphia International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Washington Dulles to Philadelphia International flights are currently cheapest in July.
Jul
from 166 €
Aug
from 205 €
Sep
from 204 €
Oct
from 203 €
Nov
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Dec
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Jan
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Feb
from 205 €
Mar
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Apr
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May
from 249 €
Jun
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Direct flights from Washington Dulles to Philadelphia International

Washington Dulles to Philadelphia International: Alternative routes

Compare routes from Washington Dulles to Philadelphia below. You may find an airport to fly into that's cheaper, faster, or easier than Philadelphia International.

Washington D.C. to Philadelphia: Flight information

The things to know before you go.
Cheapest flight found166 €
Cheapest month to flyJuly
Average flight time1 hr, 13 mins
Most popular airlineUnited
Average flights per week68

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

The best price we found for a return flight from Washington Dulles to Philadelphia International is 166 €. 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 13 minutes is the average flight time from Washington Dulles to Philadelphia International.
United, GoJet Airlines and Copa fly direct from Washington Dulles to Philadelphia International.
As of July 2025, there are 68 flights per week flying from Washington Dulles to Philadelphia International.
The cheapest month to fly from Washington Dulles to Philadelphia International is usually July.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Washington Dulles Airport to Philadelphia International Airport on Friday, 25 July 2025.
Yes – the average flight time is 1 hour and 13 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 International 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.
Currently, United offers the cheapest flight tickets to Philadelphia International.

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

  • Around 1 hour 10 minutes is how long you can expect to be travelling on a direct flight from Washington Dulles International Airport to Philadelphia International Airport.

  • Washington DC and Philadelphia share the UTC-4 timezone. That means you won't have to change your watch when you arrive.

  • Each week, there are 28 Washington Dulles International Airport to Philadelphia International Airport flights. To jet off as early as possible, opt for the 08:15 United Airlines flight. If you'd rather make the most of your time before flying, the last departure is at 22:15 with United Airlines.

  • Your IAD to PHL flight won't wait if you're late, so be at the airport on time. Arrive up to one hour in advance for domestic flights and two hours ahead for international travel.

  • You can expect bigger queues during popular months like April. Arriving up to four hours ahead of international flights and two hours for a domestic departure will help ensure a smooth travel experience.

  • United Airlines is your gateway to discovering Philadelphia (and maybe even some other exciting corners of United States!). Browse the direct flights from Washington Dulles International Airport to Philadelphia International Airport offered by this airline.

  • United Airlines is the airline with the highest passenger demand for this route.

  • With 75.43% of services landing on schedule, United Airlines is the most punctual carrier operating IAD to PHL flights.

  • We make it simple to book a flight with a stopover. To see all your options for tickets from Washington Dulles International Airport to Philadelphia International Airport, uncheck 'Direct flights only.' Then, pick a flight offering a stop long enough to visit your chosen city. Popular stopovers between IAD and PHL include:

    • Harrisburg International Airport

    • Norfolk International Airport

    • Pearson International Airport

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

  • Currently, 174 € is the cheapest price we've seen for a one-way Washington Dulles International Airport to Philadelphia International Airport flight. The best price for a return ticket is 166 €. Keep in mind that fares can change due to availability when booking.

  • To score cheap tickets from IAD to PHL, book your journey six months ahead of your departure date.

  • The cheapest month for flights from Washington Dulles International Airport to Philadelphia International Airport is May. Use the 'Whole month' tool to find the lowest airfares if you have flexible travel dates.

  • Never miss a deal on cheap flights from IAD to PHL by setting up a Price Alert. We'll send you an email or push notification on the app when a lower fare becomes available.

  • Pick your ideal departure and arrival times, airlines and number of stops with the filters. Alternatively, sort your results by 'Cheapest' to get the best deals on flights from Washington Dulles International Airport to Philadelphia International Airport.

Handy information about Washington Dulles International Airport (IAD)

  • The address for IAD is 1 Saarinen Circle.

  • When it comes to the on-time performance of Washington Dulles International Airport, data shows 74.39% of flights meet their scheduled arrival time.

  • Washington Dulles International Airport is around 56 kilometres from central Washington DC. If you're driving, ride-sharing or catching a cab from the centre, it'll take 50 minutes or so to arrive, depending on the traffic.

  • Taking public transport? Expect a journey time of around 3 hours 25 minutes.

  • Need a convenient hotel near IAD? If you're catching an early flight from Washington Dulles International Airport to Philadelphia International Airport, these stays will put you moments from your departure gate:

Arriving at Philadelphia International Airport (PHL)

Getting from Philadelphia International Airport (PHL) to central Philadelphia

  • The street address for PHL is Industrial Highway and Island Road.

  • Philadelphia International Airport is roughly 19 kilometres from central Philadelphia. The drive time takes around 15 minutes.

  • When travelling on public transport, expect a journey of roughly 45 minutes.

When to fly to Philadelphia International Airport (PHL)

  • The quietest month for a flight from Washington Dulles International Airport to Philadelphia International Airport is February, while August is the busiest. Pick the best time to visit Philadelphia based on whether you prefer a more fast-paced or easygoing experience.

  • The warmest month in Philadelphia is July, with the temperature ranging between 18ºC (64ºF) and 32ºC (90ºF). Lock in your flights from Washington Dulles International Airport to Philadelphia International Airport in this month if this is the kind of weather you like.

  • January sees average temperatures of between -7ºC (19ºF) and 9ºC (48ºF). Look for cheap tickets from IAD to PHL around that time if you like cooler conditions.

Explore more of United States

  • Philadelphia has plenty going for it, but there are so many other corners of United States waiting to be explored. Around 129 kilometres north-east of Philadelphia, a visit to New York will fill your itinerary to the brim. Start with attractions like Statue of Liberty, Central Park and Empire State Building.

  • Boston is another must-experience destination in United States and is around 434 kilometres north-east of Philadelphia. No trip is complete without a visit to Freedom Trail, Museum of Fine Arts Boston and Boston Tea Party Ships & 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 45 days.