$120 Cheap Flights from Phoenix (PHX) to Washington (IAD)

View $120 flight on Sat, Aug 16, 2025Opens in a new window

Popular airlines from Phoenix Sky Harbor Intl. Airport (PHX) to Washington Dulles Intl. Airport (IAD)

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Cheap Flights from Phoenix to Washington (PHX-IAD)

Prices were available within the past 7 days and start at $120 for one-way flights and $170 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Mon, Nov 3 - Fri, Nov 7
PHX
Phoenix
IAD
Washington
$170 Roundtrip, found 6 days ago
$170
Roundtrip
found 6 days ago
Select United flight, departing Mon, Nov 3 from Phoenix to Washington, returning Fri, Nov 7, priced at $170 found 6 days ago
United
Sat, Aug 2 - Sat, Aug 16
PHX
Phoenix
IAD
Washington
$188 Roundtrip, found 5 days ago
$188
Roundtrip
found 5 days ago
Select United flight, departing Sat, Aug 2 from Phoenix to Washington, returning Sat, Aug 16, priced at $188 found 5 days ago
United
Thu, Nov 6 - Tue, Nov 11
PHX
Phoenix
IAD
Washington
$195 Roundtrip, found 5 days ago
$195
Roundtrip
found 5 days ago
Select United flight, departing Thu, Nov 6 from Phoenix to Washington, returning Tue, Nov 11, priced at $195 found 5 days ago
Hawaiian Airlines
Tue, Nov 18 - Sat, Dec 6
PHX
Phoenix
IAD
Washington
$201 Roundtrip, found 5 days ago
$201
Roundtrip
found 5 days ago
Select Hawaiian Airlines flight, departing Tue, Nov 18 from Phoenix to Washington, returning Sat, Dec 6, priced at $201 found 5 days ago
Delta
Sat, Nov 1 - Tue, Dec 2
PHX
Phoenix
IAD
Washington
$231 Roundtrip, found 6 days ago
$231
Roundtrip
found 6 days ago
Select Delta flight, departing Sat, Nov 1 from Phoenix to Washington, returning Tue, Dec 2, priced at $231 found 6 days ago
Southwest Airlines
Wed, Aug 13 - Sat, Aug 16
PHX
Phoenix
IAD
Washington
$239 Roundtrip, found 1 hour ago
$239
Roundtrip
found 1 hour ago
Select Southwest Airlines flight, departing Wed, Aug 13 from Phoenix to Washington, returning Sat, Aug 16, priced at $239 found 1 hour ago
United
Wed, Aug 13 - Sat, Aug 16
PHX
Phoenix
IAD
Washington
$239 Roundtrip, found 1 hour ago
$239
Roundtrip
found 1 hour ago
Select United flight, departing Wed, Aug 13 from Phoenix to Washington, returning Sat, Aug 16, priced at $239 found 1 hour ago
United
Wed, Aug 13 - Sat, Aug 16
PHX
Phoenix
IAD
Washington
$241 Roundtrip, found 1 hour ago
$241
Roundtrip
found 1 hour ago
Select United flight, departing Wed, Aug 13 from Phoenix to Washington, returning Sat, Aug 16, priced at $241 found 1 hour ago
Frontier Airlines
Tue, Aug 12 - Tue, Aug 19
PHX
Phoenix
IAD
Washington
$248 Roundtrip, found 9 hours ago
$248
Roundtrip
found 9 hours ago
Select Frontier Airlines flight, departing Tue, Aug 12 from Phoenix to Washington, returning Tue, Aug 19, priced at $248 found 9 hours ago
United
Wed, Aug 13 - Sat, Aug 16
PHX
Phoenix
IAD
Washington
$249 Roundtrip, found 1 hour ago
$249
Roundtrip
found 1 hour ago
Select United flight, departing Wed, Aug 13 from Phoenix to Washington, returning Sat, Aug 16, priced at $249 found 1 hour ago

Find the cheapest month to fly from Phoenix (PHX) to Washington (IAD)

May is typically the cheapest month to fly

From $140 - $290 per traveler.

Graph displaying average flight prices per month

Alternative airports near Washington

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Ronald Reagan Washington National DCA. Cheapest and Closest option available. Average driving time to city center is 8 minutes. Flights from $359
DCA
Ronald Reagan Washington National
CheapestClosest
Average driving time to city center8 min
Flights from $359
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
Roundtrip price
$170
Distance
1952 mi
Average flight time
7 hours 22 mins

Phoenix to Washington Flights

The cheapest times to fly from Phoenix to Washington

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Phoenix to Washington are during the month of November. You can find some of the cheapest flights from Phoenix to Washington with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Phoenix to Washington

Sunday is one of the best days to book for cheap flights from Phoenix to Washington: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Phoenix to Washington

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Phoenix to Washington in 2025. You can also book with separate airlines for your outbound and return journeys, from $120 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Phoenix to Washington flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Phoenix to Washington airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Sky Harbor Intl. Airport (PHX) to Washington Dulles Intl. Airport (IAD) cost?
Pick up cheap return fares starting from $239 from Sky Harbor Intl. Airport (PHX) to Washington Dulles Intl. Airport (IAD). This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a United flight leaving PHX on August 9 2025 and touching down at IAD. The price was last updated on July 15 2025 and has not changed since.
What is the cheapest month to fly from PHX to IAD?
The cheapest flights from PHX to IAD are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Sky Harbor Intl. Airport (PHX) to Washington Dulles Intl. Airport (IAD)?
If you're departing from Sky Harbor Intl. Airport (PHX), you can take a nonstop flight to Washington Dulles Intl. Airport (IAD) with United Airlines.
What is the cheapest airline that flies from PHX to IAD?
Right now, the cheapest airline operating one-way flights from PHX to IAD is Southwest Airlines. You can jet off on this route from $120. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from PHX on October 1 2025. Prices were last updated on July 15 2025 and have not changed since.
How many flights per day from Sky Harbor Intl. Airport (PHX) to Washington Dulles Intl. Airport (IAD)?
Every day on average, 2 direct flights operate from Sky Harbor Intl. Airport (PHX) to Washington Dulles Intl. Airport (IAD). Pick the departure time that works for you.
What are the most popular departure times for flights from Sky Harbor Intl. Airport (PHX) to Washington Dulles Intl. Airport (IAD)?
Flights between PHX and IAD are their busiest at 9 AM. If you want a more relaxed trip and possibly cheaper fares, look for a time outside the usual busy windows.
What day of the week has the most flights from PHX to IAD?
If you travel on a Sunday, you'll get the widest range of choices for flights from Sky Harbor Intl. Airport (PHX) to Washington Dulles Intl. Airport (IAD).
What is the earliest flight from Sky Harbor Intl. Airport (PHX) to Washington Dulles Intl. Airport (IAD)?
Hop on the earliest flight at around 9:30AM UTC-7, leaving from Sky Harbor Intl. Airport (PHX). You'll be traveling for around 4h 15m, reaching Washington Dulles Intl. Airport (IAD) at approximately 3:45PM UTC-5.
How long does it take to fly from Sky Harbor Intl. Airport (PHX) to Washington Dulles Intl. Airport (IAD)?
The average flight duration from PHX to IAD is 4 hours and 11 minutes, covering a total distance of 1,950 mi.
What airline has the least delays from PHX to IAD?
With 89% of journeys typically arriving on time, United Airlines has the best on-time performance for direct flights from Sky Harbor Intl. Airport (PHX) to Washington Dulles Intl. Airport (IAD). To monitor your flight status and receive notifications if anything changes, use the Expedia App.
What is the best time to fly from Sky Harbor Intl. Airport (PHX) to Washington Dulles Intl. Airport (IAD)?
Choose a flight from Sky Harbor Intl. Airport (PHX) to Washington Dulles Intl. Airport (IAD) that takes off before 3 PM to reduce the risk of delays and cancellations. Departures after this hour are on average 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Washington from Sky Harbor Intl. Airport (PHX)?
Sky Harbor Intl. Airport (PHX) has direct flights to Washington. These are a few of the airports you can fly to without detours:

  • Ronald Reagan Washington National Airport (DCA)
  • Baltimore Washington Intl. Thurgood Marshall Airport (BWI)
  • Washington Dulles Intl. Airport (IAD)

Is it cheaper to buy a plane ticket from Sky Harbor Intl. Airport (PHX) to Washington Dulles Intl. Airport (IAD) last-minute?
Holding off until just before your trip to book a ticket from PHX to IAD generally means paying more. Although you may find some last-minute deals, they aren't always guaranteed. Be flexible with your travel plans for a better chance of landing a bargain.
Is it cheaper to book a PHX to IAD flight and hotel package?
Compared with arranging hotels and flights separately, booking a PHX to IAD flight and hotel package with Expedia could lead to significant savings. Better still, managing everything in one place will take the hassle out of travel planning. Simply pick your flights and choose from our wide range of stays, then personalize your trip with extras like tours, car rentals and activities.
Can I cancel or change the date of my flight from Sky Harbor Intl. Airport (PHX) to Washington Dulles Intl. Airport (IAD)?
If you reserved your PHX to IAD flight within the last 24 hours, you may be able to cancel or modify it at no cost. Depending on the airline and the fare type you purchased, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal for more information.

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