Skyscanner

Cheap Flights from Washington Dulles to Philadelphia

Travellers and cabin class

Compare Washington Dulles to Philadelphia flight deals

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

Book the best Philadelphia fare with no extra fees

Flight deals from Washington Dulles to Philadelphia

Looking for a cheap last-minute deal or the best return flight from Washington Dulles to Philadelphia? Find the lowest prices on one-way and return tickets right here.
Philadelphia.R 3,623 per passenger.Departing Mon, 18 Aug.One-way flight with United.Outbound direct flight with United departs from Washington Dulles on Mon, 18 Aug, arriving in Philadelphia International.Price includes taxes and charges.From R 3,623, select.
Philadelphia.R 3,636 per passenger.Departing Thu, 3 Jul.One-way flight with United.Outbound direct flight with United departs from Washington Dulles on Thu, 3 Jul, arriving in Philadelphia International.Price includes taxes and charges.From R 3,636, select.
Philadelphia.R 3,636 per passenger.Departing Mon, 23 Jun.One-way flight with United.Outbound direct flight with United departs from Washington Dulles on Mon, 23 Jun, arriving in Philadelphia International.Price includes taxes and charges.From R 3,636, select.
Philadelphia.R 3,809 per passenger.Departing Sat, 20 Sep.One-way flight with American Airlines.Outbound indirect flight with American Airlines, departs from Washington Dulles on Sat, 20 Sep, arriving in Philadelphia International.Price includes taxes and charges.From R 3,809, select.
Philadelphia.R 3,874 per passenger.Departing Mon, 12 Jan.One-way flight with United.Outbound direct flight with United departs from Washington Dulles on Mon, 12 Jan, arriving in Philadelphia International.Price includes taxes and charges.From R 3,874, select.
Philadelphia.R 3,874 per passenger.Departing Fri, 5 Dec.One-way flight with United.Outbound direct flight with United departs from Washington Dulles on Fri, 5 Dec, arriving in Philadelphia International.Price includes taxes and charges.From R 3,874, select.
Philadelphia.R 3,890 per passenger.Departing Wed, 3 Sep.One-way flight with United.Outbound direct flight with United departs from Washington Dulles on Wed, 3 Sep, arriving in Philadelphia International.Price includes taxes and charges.From R 3,890, select.
Philadelphia.R 3,905 per passenger.Departing Sat, 4 Oct.One-way flight with United.Outbound direct flight with United departs from Washington Dulles on Sat, 4 Oct, arriving in Philadelphia International.Price includes taxes and charges.From R 3,905, select.

Find the cheapest month to fly from Washington Dulles to Philadelphia

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Washington Dulles to Philadelphia flights are currently cheapest in August.
May
from R 7,212
Jun
from R 3,641
Jul
from R 3,641
Aug
from R 3,628
Sep
from R 3,815
Oct
from R 3,910
Nov
Find prices
Dec
from R 3,879
Jan
from R 3,879
Feb
Find prices
Mar
Find prices
Apr
Find prices

Direct flights from Washington Dulles to Philadelphia

Alternative Washington Dulles to Philadelphia routes

Looking for the cheapest, fastest or easiest route from Washington Dulles to Philadelphia? You could fly into the following airports instead.

Washington D.C. to Philadelphia: Flight information

The things to know before you go.
Cheapest flight foundR 3,623
Cheapest month to flyAugust
Average flight time1 hr, 13 mins
Most popular airlineUnited
Average flights per week76

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

There are 6 airports in Philadelphia: Philadelphia International, Blue Bell, Philadelphia Trenton-Mercer, Greater Wilmington, Atlantic City International, and Allentown.
The best price we found for a return flight from Washington Dulles to Philadelphia is R 3,191. 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.
United, GoJet Airlines and Mesa Airlines fly direct from Washington Dulles to Philadelphia.
As of May 2025, there are 76 flights per week flying from Washington Dulles to Philadelphia.
The cheapest month to fly from Washington Dulles to Philadelphia is usually May 2025.
If you're flying from Washington Dulles Airport, the cheapest airport near Philadelphia is Philadelphia International – which is 11.2 km away from the centre of Philadelphia. We've found flights into this airport from R 3,191.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Washington Dulles Airport to Philadelphia on Thursday, 10 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 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.
In May, the average temperature is usually around 16°C. July is typically the warmest month in Philadelphia, when it usually averages around 30°C. You can expect the least rain in February. The coldest month is January, with temperatures averaging -5°C. The rainiest month is July.
Currently, United offers the cheapest flight tickets to Philadelphia.

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

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

  • Philadelphia's timezone is UTC-4, which is the same as Washington DC (the location of Washington Dulles International Airport).

  • Washington Dulles International Airport (IAD) to Philadelphia International Airport (PHL) is the most popular route, with 23 weekly departures to choose from. If you prefer starting your day later, the last flight from IAD to PHL is with United Airlines at 22:15. Opt for the first departure with United Airlines at 08:15 if you want to fly out earlier.

  • To avoid rushing for your IAD to Philadelphia flight, leave enough time for things like check-in and baggage drop. Turning up two hours ahead of international departures and one hour before domestic flights is the general rule.

  • Longer lines at security and check-in are likely if you're jetting off during high season, so give yourself some extra wiggle room. A good rule of thumb for peak times? Arrive up to four hours ahead for international flights and at least two hours for domestic departures.

  • You can book a direct Washington Dulles International Airport to Philadelphia ticket. Start your trip at IAD and land at Philadelphia International Airport (PHL).

  • Get on board with United Airlines. This airline operates direct flights from Washington Dulles International Airport to Philadelphia.

  • Travelling from central Washington DC to IAD takes around 1 hour 10 minutes by public transport. If you drive, ride-share or get a cab, you'll cover the 40 kilometres in 50 minutes or so, depending on traffic.

  • Want an easy start to your holiday? Stay near IAD. Whether you're taking an early flight from Washington Dulles International Airport to Philadelphia or don't want departure day to feel hectic, these hotels have you covered:

  • 74.39% of flights leaving from Washington Dulles International Airport make it to their destination on schedule.

  • The address for IAD is 1 Saarinen Circle.

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

  • R 3,623 is currently the lowest price for a one-way Washington Dulles International Airport to Philadelphia flight. Return flight tickets start at R 3,186. These prices can change based on demand.

  • To snag cheap flights from IAD to Philadelphia, reserve your journey one month before your departure date.

  • Organise your trip for May. That's the best month for scoring an incredible deal on Washington Dulles International Airport to Philadelphia tickets. If you're flexible with your travel dates, use the 'Whole month' tool to access the lowest price across each month.

  • Picking up a cheap flight from IAD to Philadelphia is a breeze with Price Alerts. All you need to do is create one of these automatic notifications and we'll let you know when a lower fare pops up.

  • Choose your ideal departure and arrival times, airlines and number of stops with our filters. Then, sort the results for your flight from Washington Dulles International Airport to Philadelphia by 'Best,' 'Fastest' or 'Cheapest.'

Airports in Philadelphia

Philadelphia International Airport (PHL)

  • Philadelphia International Airport (PHL) to central Philadelphia takes about 15 minutes to reach by car. The centre is roughly 19 kilometres away.

  • It typically takes 45 minutes if you're travelling on public transport.

  • Consider staying in a hotel near PHL if you have a late flight from Washington Dulles International Airport to Philadelphia. Pick one of these options and make your first night all about rest:

  • Pick up a Philadelphia International Airport rental car and discover Philadelphia and beyond with your own wheels. Dollar, Thrifty and Budget are top outlets you can book with here.

  • Booking your vehicle from Philadelphia International Airport about three weeks in advance of your flight from IAD to Philadelphia can help you lock in the best possible rate.

  • The address for PHL is 8500 Essington Ave.

Trenton-Mercer Airport (TTN)

  • Once your flight from Washington Dulles International Airport to Philadelphia has landed, you can reach the city centre in about 40 minutes by car. Central Philadelphia is roughly 56 kilometres from Trenton-Mercer Airport (TTN).

  • You can expect the trip to take about 1 hour 45 minutes on public transport.

  • There are some comfortable places to rest your head close to TTN. Settle in and get cosy after your IAD to Philadelphia flight at any of these perfectly located options:

  • Budget, National and Enterprise make picking up a Trenton-Mercer Airport rental car easy and quick. These providers are located in or around the terminal and will have you ready to go in a flash.

  • Lock in the best price by securing your ride from TTN four weeks in advance. You can also expect to have a greater range of vehicles.

  • Trenton-Mercer Airport is located at Scotch Road, Terminal Building.

Best time to go to Philadelphia

  • Travel to Philadelphia during high season if you prefer a busy atmosphere, but remember that hotel prices are generally higher. Alternatively, book your flights from Washington Dulles International Airport to Philadelphia in the low season when prices are cheaper and it's quieter.

  • Lock in a Washington Dulles International Airport to Philadelphia flight ticket with a departure in July if you're eager to experience the city during its warmest month. Expect temperatures to range from 18ºC (64ºF) to 32ºC (90ºF).

  • Search for cheap tickets from IAD to Philadelphia in January if you want to travel in cooler conditions. Temperatures are at their lowest then, ranging between -7ºC (19ºF) and 9ºC (48ºF) on average.

More about Philadelphia

Explore more of United States

  • New York is just one of the many places in United States waiting to be discovered once you've taken in the sights of Philadelphia. Around 129 kilometres away to the north-east, top sights here include Statue of Liberty, Central Park and Empire State Building.

  • If you want to check out another side of United States, consider Boston, about 434 kilometres north-east of Philadelphia. Freedom Trail, Museum of Fine Arts Boston and Boston Tea Party Ships & Museum are among the biggest draws.

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.