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113 € Cheap Flights from Philadelphia to Washington Dulles

Compare Philadelphia to Washington Dulles flight deals

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Flight deals from Philadelphia to Washington Dulles

Looking for a cheap last-minute deal or the best return flight from Philadelphia to Washington Dulles Airport? If you want to travel next month, return fares start from 118 €. Find the lowest prices on one-way and return tickets right here.
Washington D.C..113 € per passenger.Departing Wed, 14 Oct, returning Wed, 21 Oct.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Philadelphia International on Wed, 14 Oct, arriving in Washington Dulles.Inbound indirect flight with Frontier Airlines, departs from Washington Dulles on Wed, 21 Oct, arriving in Philadelphia International.Price includes taxes and charges.From 113 €, select.
Washington D.C..117 € per passenger.Departing Tue, 8 Sep, returning Tue, 29 Sep.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Philadelphia International on Tue, 8 Sep, arriving in Washington Dulles.Inbound indirect flight with Frontier Airlines, departs from Washington Dulles on Tue, 29 Sep, arriving in Philadelphia International.Price includes taxes and charges.From 117 €, select.
Washington D.C..118 € per passenger.Departing Tue, 25 Aug, returning Mon, 31 Aug.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Philadelphia International on Tue, 25 Aug, arriving in Washington Dulles.Inbound indirect flight with Frontier Airlines, departs from Washington Dulles on Mon, 31 Aug, arriving in Philadelphia International.Price includes taxes and charges.From 118 €, select.
Washington D.C..119 € per passenger.Departing Tue, 8 Sep, returning Tue, 6 Oct.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Philadelphia International on Tue, 8 Sep, arriving in Washington Dulles.Inbound indirect flight with Frontier Airlines, departs from Washington Dulles on Tue, 6 Oct, arriving in Philadelphia International.Price includes taxes and charges.From 119 €, select.
Washington D.C..124 € per passenger.Departing Tue, 11 Aug, returning Sat, 5 Sep.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Philadelphia International on Tue, 11 Aug, arriving in Washington Dulles.Inbound indirect flight with Frontier Airlines, departs from Washington Dulles on Sat, 5 Sep, arriving in Philadelphia International.Price includes taxes and charges.From 124 €, select.
Washington D.C..128 € per passenger.Departing Tue, 13 Oct, returning Wed, 4 Nov.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Philadelphia International on Tue, 13 Oct, arriving in Washington Dulles.Inbound indirect flight with Frontier Airlines, departs from Washington Dulles on Wed, 4 Nov, arriving in Philadelphia International.Price includes taxes and charges.From 128 €, select.
Washington D.C..146 € per passenger.Departing Wed, 4 Nov, returning Wed, 11 Nov.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Philadelphia International on Wed, 4 Nov, arriving in Washington Dulles.Inbound indirect flight with Frontier Airlines, departs from Washington Dulles on Wed, 11 Nov, arriving in Philadelphia International.Price includes taxes and charges.From 146 €, select.
Washington D.C..194 € per passenger.Departing Thu, 16 Jul, returning Mon, 10 Aug.Return flight with Allegiant Air and Frontier Airlines.Outbound indirect flight with Allegiant Air, departs from Philadelphia International on Thu, 16 Jul, arriving in Washington Dulles.Inbound indirect flight with Frontier Airlines, departs from Washington Dulles on Mon, 10 Aug, arriving in Philadelphia International.Price includes taxes and charges.From 194 €, select.
Washington D.C..209 € per passenger.Departing Thu, 31 Dec, returning Thu, 14 Jan.Return flight with United.Outbound direct flight with United departs from Philadelphia International on Thu, 31 Dec, arriving in Washington Dulles.Inbound direct flight with United departs from Washington Dulles on Thu, 14 Jan, arriving in Philadelphia International.Price includes taxes and charges.From 209 €, select.
Washington D.C..209 € per passenger.Departing Fri, 23 Oct, returning Fri, 30 Oct.Return flight with United.Outbound direct flight with United departs from Philadelphia International on Fri, 23 Oct, arriving in Washington Dulles.Inbound direct flight with United departs from Washington Dulles on Fri, 30 Oct, arriving in Philadelphia International.Price includes taxes and charges.From 209 €, select.
Washington D.C..209 € per passenger.Departing Sat, 23 Jan, returning Sat, 30 Jan.Return flight with United.Outbound direct flight with United departs from Philadelphia International on Sat, 23 Jan, arriving in Washington Dulles.Inbound direct flight with United departs from Washington Dulles on Sat, 30 Jan, arriving in Philadelphia International.Price includes taxes and charges.From 209 €, select.
Washington D.C..209 € per passenger.Departing Wed, 4 Nov, returning Wed, 11 Nov.Return flight with United.Outbound direct flight with United departs from Philadelphia International on Wed, 4 Nov, arriving in Washington Dulles.Inbound direct flight with United departs from Washington Dulles on Wed, 11 Nov, arriving in Philadelphia International.Price includes taxes and charges.From 209 €, select.
Washington D.C..209 € per passenger.Departing Fri, 18 Sep, returning Fri, 25 Sep.Return flight with United.Outbound direct flight with United departs from Philadelphia International on Fri, 18 Sep, arriving in Washington Dulles.Inbound direct flight with United departs from Washington Dulles on Fri, 25 Sep, arriving in Philadelphia International.Price includes taxes and charges.From 209 €, select.
Washington D.C..209 € per passenger.Departing Wed, 23 Dec, returning Wed, 30 Dec.Return flight with United.Outbound direct flight with United departs from Philadelphia International on Wed, 23 Dec, arriving in Washington Dulles.Inbound direct flight with United departs from Washington Dulles on Wed, 30 Dec, arriving in Philadelphia International.Price includes taxes and charges.From 209 €, select.
Washington D.C..209 € per passenger.Departing Tue, 13 Oct, returning Wed, 4 Nov.Return flight with United.Outbound direct flight with United departs from Philadelphia International on Tue, 13 Oct, arriving in Washington Dulles.Inbound direct flight with United departs from Washington Dulles on Wed, 4 Nov, arriving in Philadelphia International.Price includes taxes and charges.From 209 €, select.
Washington D.C..209 € per passenger.Departing Sun, 26 Jul, returning Sun, 9 Aug.Return flight with United.Outbound direct flight with United departs from Philadelphia International on Sun, 26 Jul, arriving in Washington Dulles.Inbound direct flight with United departs from Washington Dulles on Sun, 9 Aug, arriving in Philadelphia International.Price includes taxes and charges.From 209 €, select.

Find the cheapest month to fly from Philadelphia to Washington Dulles

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Philadelphia to Washington Dulles flights are currently cheapest in October.
Jul
from 248 €
Aug
from 118 €
Sep
from 117 €
Oct
from 113 €
Nov
from 146 €
Dec
from 209 €
Jan
from 209 €
Feb
Find prices
Mar
from 209 €
Apr
Find prices
May
from 271 €
Jun
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Direct flights from Philadelphia to Washington Dulles

Philadelphia to Washington Dulles: Alternative routes

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

Washington Ronald Reagan

5km from central Washington D.C.
Closest
from 254 €
Search flights

Washington Dulles

37km from central Washington D.C.
Cheapest
from 113 €
Search flights

Baltimore Washington International

44km from central Washington D.C.
from 114 €
Search flights

Philadelphia to Washington D.C.: Flight information

The things to know before you go.
Cheapest flight found113 €
Cheapest month to flyOctober
Average flight time1 hr, 11 mins
Most popular airlineUnited
Average flights per week110

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

The best price we found for a return flight from Philadelphia to Washington Dulles is 113 €. 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 to Washington Dulles.
United, GoJet Airlines and Mesa Airlines fly direct from Philadelphia to Washington Dulles.
As of July 2026, there are 110 flights per week flying from Philadelphia to Washington Dulles.
The cheapest month to fly from Philadelphia to Washington Dulles is usually October.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Philadelphia to Washington Dulles Airport on Wednesday, 14 October 2026.
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.

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

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

  • Your next big escape starts at Philadelphia's main airport, Philadelphia International Airport (PHL). Check out your options for reserving a flight from Philadelphia to Washington Dulles International Airport (IAD) departing from this terminal.

  • 1 hour 10 minutes is the average travel time for a direct Philadelphia to Washington Dulles International Airport flight.

  • Washington DC (where Washington Dulles International Airport is located) and Philadelphia share the UTC-5 timezone. With no time difference, coordinating plans between the cities is hassle-free.

  • Philadelphia International Airport (PHL) to Washington Dulles International Airport (IAD) is the most popular route. There are 22 direct flights a week to choose from. If you prefer starting your day later, hop on the last flight with United Airlines at 7:59pm. Go for the first PHL to IAD departure operated by United Airlines at 6:10am if you'd rather get going earlier.

  • For a smooth journey, arrive at the airport two hours ahead of international flights and one hour before domestic departures. This ensures you have enough time to catch your flight from Philadelphia to IAD.

  • If you're going away during a peak month like July, arrive at the terminal even earlier. It's wise to arrive up to four hours before international flights and two hours ahead of domestic departures. You can expect lines to be longer during peak periods like Thanksgiving and spring break.

Airports in Philadelphia

Philadelphia International Airport (PHL)

  • Get to your destination in one go from Philadelphia International Airport (PHL). Nonstop flights from Philadelphia to Washington Dulles International Airport (IAD) can be booked from here.

  • You can travel on a direct flight from Philadelphia to Washington Dulles International Airport with United Airlines. This leading airline operates services from PHL.

  • The majority of passengers choose to book seats with United between PHL and IAD.

  • United leads the way as the most punctual carrier on this route, with 81.77% of its services landing as scheduled.

  • Travelling from central Philadelphia to PHL takes around 30 minutes on public transport. If you drive, ride-share or grab a taxi, you'll cover the 18 kilometres in 20 minutes or so, depending on traffic conditions.

  • Want an easy start to your travels? Stay near Philadelphia International Airport. Whether you have an early flight from Philadelphia to Washington Dulles International Airport or aren't a fan of being rushed, these hotels are the ideal choice:

  • When it comes to the on-time performance of Philadelphia International Airport, 77% of flights complete their journey on time.

  • You'll find PHL at 8500 Essington Ave.

Trenton-Mercer Airport (TTN)

  • With public transport, you can travel from central Philadelphia to TTN in about 1 hour 35 minutes. The terminal is roughly 48 kilometres away, and making the trip by car takes approximately 40 minutes.

  • Start your holiday early with an extra night away from home. Before your Philadelphia to IAD flight, kick back in one of these hotels near Trenton-Mercer Airport:

  • When it comes to keeping flights punctual, Trenton-Mercer Airport has an on-time arrival rate of 76%.

  • The address for TTN is Scotch Road, Terminal Building.

About Washington Dulles International Airport (IAD)

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

  • From Washington Dulles International Airport, central Washington DC is around 40 kilometres away. It takes about 45 minutes to reach the city centre by car.

  • Travelling by public transport will take you around 1 hour 10 minutes.

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

  • The lowest price we've found for a one-way ticket from Philadelphia to Washington Dulles International Airport is 58 €. For a return flight on this route, the best price is 113 €. Depending on how early you book and the availability, these fares can change.

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

  • Affordable Philadelphia to Washington Dulles International Airport tickets are easier to find if you're not locked into specific dates. Try using the 'Whole month' search function to compare fares across each month and then fly out on the cheapest day.

  • Snapping up a cheap plane ticket from Philadelphia to IAD is a piece of cake with Price Alerts. All you need to do is set up one of these automatic alerts and we'll notify you as soon as a lower fare pops up.

  • Hunt for savings on a flight from Philadelphia to Washington Dulles International Airport with the help of the filters. Choose your ideal departure and arrival times, airlines and number of stops. You can also sort your results by 'Fastest,' 'Cheapest' or 'Best.'

The best time to fly from Philadelphia to Washington Dulles International Airport (IAD)

  • It's time to decide when to book your flight from Philadelphia to Washington Dulles International Airport (IAD). June is when most people visit Washington DC. If you like things a bit more low-key, think about going in February.

  • Before locking in your Philadelphia to IAD plane ticket, consider the kind of weather forecast you're hoping for. July is the warmest month in Washington DC, with temperatures ranging from 19ºC (66ºF) to 33ºC (91ºF).

  • January sees temperatures of between -6ºC (21ºF) and 10ºC (50ºF). Look for cheap tickets from Philadelphia to Washington Dulles International Airport around that time if you want to travel in cooler conditions.

More about Washington DC

Explore more of the United States

  • Philadelphia is just one of the many cities in the United States waiting to be discovered after you've experienced Washington DC. Around 225 kilometres away to the northeast, its best attractions include Independence Hall, Liberty Bell and Philadelphia Museum of Art.

  • Virginia Beach is another standout destination in the United States and is around 274 kilometres southeast of Washington DC. No journey is complete without visiting Virginia Beach Boardwalk, Resort Beach and Neptune's Park.

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

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