Title: £350 Cheap Flights from Philadelphia to Washington (PHL to IAD) - Expedia.co.uk ![Washington DC in Spring](https://images.trvl-media.com/place/3763/58eb1a51-e7f1-4f17-88af-21174d495e42.jpg?impolicy=fcrop&w=1200&h=500&q=medium) ![](https://images.trvl-media.com/place/3763/58eb1a51-e7f1-4f17-88af-21174d495e42.jpg?impolicy=fcrop&w=1200&h=500&q=medium) # £350 Cheap Flights from Philadelphia (PHL) to Washington (IAD) [View £350 flight on Sun, 23 Nov 2025](https://expedia.co.uk/Flights-Search?trip=oneway&leg1=from:PHL,to:IAD,departure:23/11/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:349.90&airProductToken=AQpeCi0IwaYBEgM0NDMY71kgkgEo9vD9AjDk8_0COFhAAFgBagJTVnIIVkg0T0FWQk4KLQjBpgESAzM2NxiSASCIGCig9P0CMMb2_QI4WEABWAFqAlNWcghRSDJPQVZCThIKCAEQARgBKgJBUxgBIgQIARABKAIoAygEMAE) - [Return](?flightType=roundtrip) - [One-way](?flightType=oneway) - [Multi-city](?flightType=multicity) ### Travellers Adults ChildrenAges 2 to 17 InfantsYounger than 2 EconomyPremium economyBusiness classFirst class Leaving from Going to Departing Returning Add a place to stay Add a car Direct flights only ## Popular airlines from Philadelphia International Airport (PHL) to Washington Dulles International Airport (IAD) - ![United](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_UA.svg) United [](https://www.expedia.co.uk/Flights-Search?leg1=from:phl,to:iad,departure:13/11/2025TANYT&leg2=from:iad,to:phl,departure:20/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"UA"}}]) - ![American Airlines](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AA.svg) American Airlines [](https://www.expedia.co.uk/Flights-Search?leg1=from:phl,to:iad,departure:13/11/2025TANYT&leg2=from:iad,to:phl,departure:20/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AA"}}]) - ![Delta](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_DL.svg) Delta [](https://www.expedia.co.uk/Flights-Search?leg1=from:phl,to:iad,departure:13/11/2025TANYT&leg2=from:iad,to:phl,departure:20/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"DL"}}]) ![notification illustration](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__notification.svg) ### Be in the know Get alerts if flight prices drop or rise\* ![deals illustration](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__deals.svg) ### Book smarter Save up to 25% on select hotels after you book a flight\* ![trophy illustration](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__trophy.svg) ### Earn twice Earn your airline miles on top of our rewards [Sign in](https://www.expedia.co.uk/login) ## Cheap Flights from Philadelphia (PHL) to Washington (IAD) Prices were available within the past 7 days and start at £350 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply. All deals One way Return ## Find the cheapest month to fly from Philadelphia (PHL) to Washington (IAD) ### September is typically the cheapest month to fly From £114 - £440 per traveller. ## 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 . 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](https://www.expedia.co.uk/service/?langid=1033) 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. ## Travel information | Origin airport | Philadelphia Intl. | | --- | --- | | Destination airport | Washington Dulles Intl. | | Distance | 214 km | | Average flight time | 1 hour 7 mins | ## Book with confidence ### 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, 3 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 and range up to .   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 , 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. 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