$118 Cheap United flights Phoenix (PHX) to Washington (IAD)

View $118 flight on Tue, Jul 1, 2025Opens in a new window

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$118 Cheap United flights Phoenix (PHX) to Washington (IAD)

Prices were available within the past 7 days and start at $118 for one-way flights and $236 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sat, Nov 8 - Sat, Nov 15
PHX
Phoenix
IAD
Washington
$236 Roundtrip, found 1 hour ago
$236
Roundtrip
found 1 hour ago
Select United flight, departing Sat, Nov 8 from Phoenix to Washington, returning Sat, Nov 15, priced at $236 found 1 hour ago
United
Tue, Jul 1 - Fri, Jul 11
PHX
Phoenix
IAD
Washington
$236 Roundtrip, found 2 days ago
$236
Roundtrip
found 2 days ago
Select United flight, departing Tue, Jul 1 from Phoenix to Washington, returning Fri, Jul 11, priced at $236 found 2 days ago
United
Wed, Jul 30 - Sat, Aug 2
PHX
Phoenix
IAD
Washington
$241 Roundtrip, found 17 hours ago
$241
Roundtrip
found 17 hours ago
Select United flight, departing Wed, Jul 30 from Phoenix to Washington, returning Sat, Aug 2, priced at $241 found 17 hours ago
United
Sat, Nov 1 - Tue, Nov 4
PHX
Phoenix
IAD
Washington
$245 Roundtrip, found 1 day ago
$245
Roundtrip
found 1 day ago
Select United flight, departing Sat, Nov 1 from Phoenix to Washington, returning Tue, Nov 4, priced at $245 found 1 day ago
United
Sat, Nov 8 - Sat, Nov 15
PHX
Phoenix
IAD
Washington
$245 Roundtrip, found 1 hour ago
$245
Roundtrip
found 1 hour ago
Select United flight, departing Sat, Nov 8 from Phoenix to Washington, returning Sat, Nov 15, priced at $245 found 1 hour ago
United
Wed, Jul 30 - Sat, Aug 2
PHX
Phoenix
IAD
Washington
$253 Roundtrip, found 17 hours ago
$253
Roundtrip
found 17 hours ago
Select United flight, departing Wed, Jul 30 from Phoenix to Washington, returning Sat, Aug 2, priced at $253 found 17 hours ago
Flights from Phoenix (PHX) to Washington (IAD)
Origin airport
Sky Harbor Intl.
Destination airport
Washington Dulles Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Hawaiian Airlines, Southwest Airlines, Sun Country Airlines, United
Popular airline
United
Distance
1952 mi
Average flight time
9 hours 32 mins

Frequently asked questions

How much is a United Airlines flight from Sky Harbor Intl. Airport (PHX) to Washington Dulles Intl. Airport (IAD)?
Make use of the "Price (lowest to highest)" filter on Expedia to search for cheap United Airlines round-trip flights from $236 from PHX to IAD. Affordable one-way options from $118 are also on offer.**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 PHX to IAD with United Airlines?
Search for round-trip or one-way flights to Washington in January or February. You could find an affordable fare with United Airlines during these off-season months.
What is the cheapest time to book flights from Sky Harbor Intl. Airport (PHX) to Washington Dulles Intl. Airport (IAD) with United Airlines?
To find cheap United Airlines fares from Sky Harbor Intl. Airport (PHX) to Washington Dulles Intl. Airport (IAD), start searching one to three months before your planned departure. Securing domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also affect the overall price. Sunday is generally the cheapest, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking on a Sunday.**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 Sky Harbor Intl. Airport (PHX) to Washington Dulles Intl. Airport (IAD)?
Easily travel from Sky Harbor Intl. Airport (PHX) to Washington Dulles Intl. Airport (IAD) on any of United Airlines's 11 direct weekly flights. Make use of our "Nonstop" and "Airline" filters to find the United Airlines flight that'll arrive at IAD at a time that suits you.
How long does it take to fly from PHX to IAD with United Airlines?
Leave Sky Harbor Intl. Airport (PHX) for Washington Dulles Intl. Airport (IAD) on a direct United Airlines flight, and you'll be in the skies for approximately 4h 15m.
Which day of the week has the most United Airlines flights from Sky Harbor Intl. Airport (PHX) to Washington Dulles Intl. Airport (IAD)?
Thursday has the most United Airlines flights from Sky Harbor Intl. Airport (PHX) to Washington Dulles Intl. Airport (IAD). With 2 daily departures, this is a great day to find something that will suit your plans.
What is the earliest United Airlines flight from PHX to IAD?
The earliest flight from PHX to IAD with United Airlines leaves at 9:30AM UTC-7. You'll touch down at 3:45PM UTC-5. The last United Airlines flight of the day leaves at 3:10PM UTC-7 and arrives at 9:25PM UTC-5. With 20% fewer cancellations for departures before noon, jetting out early is usually the wisest option.**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?
United Airlines flights from Sky Harbor Intl. Airport (PHX) to Washington come in to Washington Dulles Intl. Airport (IAD), Ronald Reagan Washington National Airport (DCA) and Baltimore Washington Intl. Thurgood Marshall Airport (BWI). The main Washington gateway serviced by this carrier is IAD. It's worth considering flights arriving at other nearby airports on Expedia as they may offer cheaper prices.
Why fly with United Airlines from PHX to IAD?
With a rewarding loyalty program, United Airlines is a favorite of many passengers journeying from PHX to IAD. Plus, if you're a United Mileage Plus and One Key™ member booking through Expedia, you could earn OneKeyCash™* on eligible flights along with your airline miles.*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 Sky Harbor Intl. Airport (PHX) to Washington Dulles Intl. Airport (IAD)?
For the Sky Harbor Intl. Airport (PHX) to Washington Dulles Intl. Airport (IAD) route, United Airlines typically uses Boeing 737-900 and Boeing 737-800 planes. Keep in mind that last-minute changes can occur for operational demands, so your flight could be on another aircraft.
Can I change or cancel my United Airlines flight from Sky Harbor Intl. Airport (PHX) to Washington Dulles Intl. Airport (IAD)?
Depending on your fare type, a fee generally applies if you cancel or reschedule your flight more than 24 hours after it has been confirmed. To find plane tickets with more flexibility, select our "Changes included" and "No cancel fee" boxes when you search for flights. For additional information on changing or canceling your reservation, head to "Trips," select your flight and tick "Manage Booking."

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