Flight tickets from Philadelphia International to Washington Dulles

Compare Philadelphia International to Washington Dulles flight deals

Find the cheapest month or even day of the year to fly to Washington Dulles

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Compare flight deals from Philadelphia International to Washington Dulles from ₹ 9,319

Looking for a cheap last-minute deal or the best return flight from Philadelphia International to Washington Dulles? Find the lowest prices on one-way and return tickets right here.

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

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Philadelphia International to Washington Dulles flights are currently cheapest in October.

Direct flights from Philadelphia International to Washington Dulles

Philadelphia International to Washington Dulles: Alternative routes

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

Philadelphia to Washington D.C.: Flight information

The things to know before you go.
Cheapest flight found₹ 9,319
Cheapest month to flyOctober
Average flight time1 hr, 11 mins
Most popular airlineUnited
Average flights per week101

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

The best price we found for a return flight from Philadelphia International to Washington Dulles is ₹ 15,813. 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 11 minutes is the average flight time from Philadelphia International to Washington Dulles.
United, GoJet Airlines and Copa fly direct from Philadelphia International to Washington Dulles.
As of September 2025, there are 101 flights per week flying from Philadelphia International to Washington Dulles.
The cheapest month to fly from Philadelphia International to Washington Dulles is usually October.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Philadelphia International Airport to Washington Dulles Airport on Friday, 31 October 2025.
Yes – the average flight time is 1 hour and 11 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 Washington Dulles 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.
Currently, United offers the cheapest flight tickets to Washington Dulles.

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

  • The average length of a direct flight from Philadelphia International Airport to Washington Dulles International Airport is 1 hour 10 minutes.

  • Philadelphia and Washington DC are in the same timezone, UTC-4.

  • You can choose from 28 weekly Philadelphia International Airport to Washington Dulles International Airport flights. The 06:00 departure with United Airlines is the earliest available. United Airlines operates the last service of the day at 14:50.

  • For a stress-free journey, turn up at the airport two hours ahead of international flights and one hour before domestic departures. This way, you'll have plenty of time to catch your PHL to IAD flight.

  • Travelling during a peak month such as August? School holidays and other popular periods can lead to longer queues at airport checkpoints. Play it safe and arrive up to four hours before an international flight and two hours before domestic departures.

  • United Airlines offers direct flights from Philadelphia International Airport to Washington Dulles International Airport. Book with this popular airline, then get ready to discover the sights in Washington DC — and maybe even more of United States if you have time.

  • Most passengers choose to fly with United Airlines on this route.

  • United Airlines tops the rankings as the most punctual carrier for PHL to IAD flights, with 85.23% of its services landing as scheduled.

  • We make it a piece of cake to book a flight with a stopover. To see all your options for tickets from Philadelphia International Airport to Washington Dulles International Airport, uncheck 'Direct flights only.' Then, choose a flight with a stop long enough to explore your chosen city. Top stopovers between PHL and IAD include:

    • University Park Airport

    • Richmond International Airport (Byrd Field)

    • Norfolk International Airport

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

  • The lowest price we've seen for a one-way Philadelphia International Airport to Washington Dulles International Airport flight is ₹ 9,319. A round-trip ticket right now is ₹ 15,813. Depending on the availability when you book, these fares may change.

  • To pick up cheap tickets from PHL to IAD, book your trip six months before your departure date.

  • May is the cheapest month for flights from Philadelphia International Airport to Washington Dulles International Airport. If you prefer to fly at a different time of year, the 'Whole month' tool will show you the lowest prices across every month.

  • Getting your hands on cheap flights from PHL to IAD is easy with Price Alerts. All you need to do is create one of these automatic alerts and we'll notify you as soon as fares go down.

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

Handy information about Philadelphia International Airport (PHL)

  • PHL is located at Industrial Highway and Island Road.

  • Of the departures from Philadelphia International Airport, 78.93% arrive on time at their destination.

  • Central Philadelphia to Philadelphia International Airport is around 19 kilometres. Depending on traffic, it'll take you about 15 minutes to get there if you're catching a cab, ride-sharing or driving.

  • You can expect a journey time of roughly 45 minutes on public transport.

  • Looking for a handy hotel close to PHL? If you're catching an early flight from Philadelphia International Airport to Washington Dulles International Airport, these stays will put you moments from your departure lounge:

Arriving at Washington Dulles International Airport (IAD)

Getting from Washington Dulles International Airport (IAD) to central Washington DC

  • You'll find IAD at 1 Saarinen Circle.

  • Washington Dulles International Airport is approximately 56 kilometres from the centre of Washington DC. Driving there takes about 50 minutes.

  • Getting there on public transport takes around 3 hours 25 minutes.

When to fly to Washington Dulles International Airport (IAD)

  • The quietest month for a flight from Philadelphia International Airport to Washington Dulles International Airport is January, while April is the busiest. Choose the best time to go to Washington DC based on whether you prefer a faster pace or a more relaxed vibe.

  • The warmest month in Washington DC is July, with temperatures ranging between 19ºC and 33ºC. Lock in your flights from Philadelphia International Airport to Washington Dulles International Airport in this month if this is the type of weather you enjoy.

  • If you want cooler conditions, search for a cheap ticket from PHL to IAD in January. Temperatures average between -6ºC and 10ºC then.

Explore more of United States

  • Washington DC has plenty to offer, but there are so many other parts of United States waiting to be discovered. About 322 kilometres north-east of Washington DC, a trip to New York will fill your itinerary to the brim. Start with leading attractions like Statue of Liberty, Central Park and Empire State Building.

  • Philadelphia is another favourite destination in United States and is around 193 kilometres north-east of Washington DC. No journey is complete without experiencing Liberty Bell, Independence Hall and Philadelphia Museum of Art.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.