£214 Cheap Flights from Philadelphia (PHL) to Washington (IAD)

View £214 flight on Tue, 30 Sep 2025Opens in a new window

Popular airlines from Philadelphia International Airport (PHL) to Washington Dulles International Airport (IAD)

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Cheap Flights from Philadelphia (PHL) to Washington (IAD)

Prices were available within the past 7 days and start at £214 for one-way flights and £500 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Sat, 6 Sep - Sat, 13 Sep
PHL
Philadelphia
IAD
Washington
£500 Return, found 6 days ago
£500
Return
found 6 days ago
Select Alaska Airlines flight, departing Sat, 6 Sep from Philadelphia to Washington, returning Sat, 13 Sep, priced at £500 found 6 days ago
Alaska Airlines
Sat, 6 Sep - Sat, 13 Sep
PHL
Philadelphia
IAD
Washington
£627 Return, found 6 days ago
£627
Return
found 6 days ago
Select Alaska Airlines flight, departing Sat, 6 Sep from Philadelphia to Washington, returning Sat, 13 Sep, priced at £627 found 6 days ago
Alaska Airlines
Wed, 13 Aug - Wed, 20 Aug
PHL
Philadelphia
IAD
Washington
£815 Return, found 3 days ago
£815
Return
found 3 days ago
Select Alaska Airlines flight, departing Wed, 13 Aug from Philadelphia to Washington, returning Wed, 20 Aug, priced at £815 found 3 days ago
Alaska Airlines
Sat, 6 Sep - Sat, 13 Sep
PHL
Philadelphia
IAD
Washington
£827 Return, found 6 days ago
£827
Return
found 6 days ago
Select Alaska Airlines flight, departing Sat, 6 Sep from Philadelphia to Washington, returning Sat, 13 Sep, priced at £827 found 6 days ago
Alaska Airlines
Wed, 13 Aug - Wed, 20 Aug
PHL
Philadelphia
IAD
Washington
£1,043 Return, found 3 days ago
£1,043
Return
found 3 days ago
Select Alaska Airlines flight, departing Wed, 13 Aug from Philadelphia to Washington, returning Wed, 20 Aug, priced at £1,043 found 3 days ago

Find the cheapest month to fly from Philadelphia (PHL) to Washington (IAD)

April is typically the cheapest month to fly

From £126 - £476 per traveller.

Graph displaying average flight prices per month

Flight from Philadelphia to Washington route information
Origin airport
Philadelphia Intl.
Destination airport
Washington Dulles Intl.
Return price
£500
Distance
214 km
Average flight time
1 hour 7 mins

Compare flights from Philadelphia to Washington easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Philadelphia to Washington. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Washington Dulles Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Philadelphia Intl. to Washington Dulles Intl..  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Philadelphia Intl. (PHL) to Washington Dulles Intl. (IAD)

The easiest way to view the best deals on flights from Philadelphia to Washington today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Philadelphia Intl. to Washington Dulles Intl. start at just £500 and range up to £1,043.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Philadelphia and Washington
  • booking your flight during September, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your Philadelphia to Washington flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Philadelphia Intl. to Washington Dulles Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Frequently asked questions

How much is a flight from PHL to IAD?
Start packing your bags, because round-trip flights between PHL and IAD start from £500. That's based on airfares listed within the last 7 days on Expedia for flights departing within the next year. Prices can move quickly, so book now to nab the best deal. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from PHL to Washington Dulles Intl. Airport (IAD)?
We get that life can throw the odd curveball, so we've made it as easy as possible for you to cancel your flight online. Just visit the Customer Service Portal and follow the instructions.
How do I find cheap flights from Philadelphia Airport to IAD that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for PHL to Washington Dulles Intl. Airport (IAD) flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Philadelphia Airport to Washington Dulles Intl. Airport (IAD)?
With a flight distance of 220 kilometres, it's just a short hop from Philadelphia Airport to Washington Dulles Intl. Airport (IAD). It might be a quick one, but it's still worth bringing something to read.
Which airlines fly direct from Philadelphia Airport to Dulles Intl. Airport?
Flying directly between Philadelphia Intl. Airport (PHL) and IAD isn't possible at the moment. However, you'll still be able to book a flight to Chantilly with at least one stop.
Are Philadelphia Airport to Washington Dulles Intl. Airport (IAD) flight tickets cheaper when they're purchased at the last minute?
Flight tickets from Philadelphia Airport to Dulles Intl. Airport are available up to 12 months before departure on Expedia. And although you may occasionally score a fantastic last-minute deal, it's never a sure thing. Also, booking your flights ahead of time means you'll have more choices — and you can avoid getting stuck in the dreaded middle seat! We're constantly updating our fares to bring you the biggest bargains, so check back often for all the latest specials.

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