$204 Cheap United flights Philadelphia (PHL) to Washington (IAD)

View $204 flight on Mon, Aug 11, 2025Opens in a new window

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$204 Cheap United flights Philadelphia (PHL) to Washington (IAD)

Prices were available within the past 7 days and start at $204 for one-way flights and $179 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Fri, Jul 25 - Sun, Jul 27
PHL
Philadelphia
IAD
Washington
$179 Roundtrip, found 4 hours ago
$179
Roundtrip
found 4 hours ago
Select United flight, departing Fri, Jul 25 from Philadelphia to Washington, returning Sun, Jul 27, priced at $179 found 4 hours ago
United
Fri, Jul 18 - Fri, Jul 25
PHL
Philadelphia
IAD
Washington
$205 Roundtrip, found 5 hours ago
$205
Roundtrip
found 5 hours ago
Select United flight, departing Fri, Jul 18 from Philadelphia to Washington, returning Fri, Jul 25, priced at $205 found 5 hours ago
United
Fri, Jul 18 - Sun, Jul 20
PHL
Philadelphia
IAD
Washington
$220 Roundtrip, found 2 days ago
$220
Roundtrip
found 2 days ago
Select United flight, departing Fri, Jul 18 from Philadelphia to Washington, returning Sun, Jul 20, priced at $220 found 2 days ago
United
Thu, Aug 28 - Sat, Aug 30
PHL
Philadelphia
IAD
Washington
$232 Roundtrip, found 1 day ago
$232
Roundtrip
found 1 day ago
Select United flight, departing Thu, Aug 28 from Philadelphia to Washington, returning Sat, Aug 30, priced at $232 found 1 day ago
United
Fri, Jul 25 - Sun, Jul 27
PHL
Philadelphia
IAD
Washington
$239 Roundtrip, found 4 hours ago
$239
Roundtrip
found 4 hours ago
Select United flight, departing Fri, Jul 25 from Philadelphia to Washington, returning Sun, Jul 27, priced at $239 found 4 hours ago
Flights from Philadelphia (PHL) to Washington (IAD)
Origin airport
Philadelphia Intl.
Destination airport
Washington Dulles Intl.
Airlines serving
American Airlines, Delta, Frontier Airlines, United
Popular airline
United
Distance
133 mi
Average flight time
1 hour 7 mins

Frequently asked questions

How much is a United Airlines flight from Philadelphia Intl. Airport (PHL) to Washington Dulles Intl. Airport (IAD)?
Apply the "Price (lowest to highest)" filter on Expedia to look for cheap United Airlines return flights from $179 from PHL to IAD. Affordable one-way tickets from $204 are available too.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from PHL to IAD with United Airlines?
United Airlines flights to Washington tend to be cheaper in the quieter months of January and February. Whether you need a one-way or a return ticket, you could find a better deal then.
What is the cheapest time to book flights from Philadelphia Intl. Airport (PHL) to Washington Dulles Intl. Airport (IAD) with United Airlines?
Start searching one to three months before your departure to score cheap fares on United Airlines flights from Philadelphia Intl. Airport (PHL) to Washington Dulles Intl. Airport (IAD). You can save 25% by booking your domestic flight 34 to 86 days in advance compared to last-minute reservations made 6 to 12 days out. You could also reduce costs by buying your fare on a Sunday, as it's 6% cheaper on average than a Monday, the most expensive day to book.* Get your timing right, and you can enjoy significant savings on domestic trips.*Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does United Airlines fly nonstop from Philadelphia Intl. Airport (PHL) to Washington Dulles Intl. Airport (IAD)?
Skip the layovers and fly from Philadelphia Intl. Airport (PHL) to Washington Dulles Intl. Airport (IAD) on any of United Airlines's 18 weekly direct flights. Make use of our "Nonstop" and "Airline" filters to find the United Airlines flight that'll take you to IAD at your preferred time.
How long does it take to fly from PHL to IAD with United Airlines?
On average, it takes 1h 14m to fly nonstop from Philadelphia Intl. Airport (PHL) to Washington Dulles Intl. Airport (IAD) with United Airlines.
Which day of the week has the most United Airlines flights from Philadelphia Intl. Airport (PHL) to Washington Dulles Intl. Airport (IAD)?
If it's flexibility you're after, Thursday offers the most choice for United Airlines flights from Philadelphia Intl. Airport (PHL) to Washington Dulles Intl. Airport (IAD). You can select from 3 different departures.
What is the earliest United Airlines flight from PHL to IAD?
The earliest United Airlines flight from PHL to IAD takes off at 6:15AM UTC-5, landing at 7:30AM UTC-5. If you prefer to head off later in the day, the last United Airlines flight leaves PHL at 2:46PM UTC-5 and touches down at IAD at 4:01PM UTC-5. Flying before noon is often a wise choice as morning and mid-morning flights are less likely to be canceled.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does United Airlines fly into in Washington?
Washington Dulles Intl. Airport (IAD) is the main arrival point for United Airlines flights from Philadelphia Intl. Airport (PHL) to Washington. But this airline also travels to Ronald Reagan Washington National Airport (DCA). Make sure you select the "All Airports" option for your destination to see all available choices for your escape in Washington.
Why fly with United Airlines from PHL to IAD?
Journey from PHL to IAD with United Airlines and you'll enjoy a range of benefits starting with a rewarding loyalty program. When booking through Expedia as a United Mileage Plus and One Key™ member, you could also earn OneKeyCash™* to spend on select future travel purchases.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
What type of plane does United Airlines fly from Philadelphia Intl. Airport (PHL) to Washington Dulles Intl. Airport (IAD)?
United Airlines usually flies Canadair (Bombardier) Regional Jet 550 planes for flights from Philadelphia Intl. Airport (PHL) to Washington Dulles Intl. Airport (IAD). This airline also operates the Embraer ERJ on this route. Keep in mind that aircraft type can vary depending on operational needs, so the plane you catch might be different when you travel.
Can I change or cancel my United Airlines flight from Philadelphia Intl. Airport (PHL) to Washington Dulles Intl. Airport (IAD)?
Depending on your ticket type, a fee typically applies if you cancel or change your booking more than 24 hours after it's been confirmed. To find flexible plane tickets, select our "No cancel fee" or "Changes included" filter when you look for flights. For more details on modifying or canceling your reservation, visit "Trips," select your flight and click on "Manage Booking."

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