$100 Cheap Flights from Phoenix (PHX) to Washington (IAD)

View $100 flight on Thu, Apr 23, 2026Opens 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 $100 for one-way flights and $190 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Tue, Apr 14 - Wed, Apr 22
PHX
Phoenix
IAD
Washington
$190 Roundtrip, found 1 hour ago
$190
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Tue, Apr 14 from Phoenix to Washington, returning Wed, Apr 22, priced at $190 found 1 hour ago
United
Sat, Mar 28 - Sat, Apr 11
PHX
Phoenix
IAD
Washington
$193 Roundtrip, found 5 days ago
$193
Roundtrip
found 5 days ago
Select United flight, departing Sat, Mar 28 from Phoenix to Washington, returning Sat, Apr 11, priced at $193 found 5 days ago
Alaska Airlines
Wed, May 6 - Sat, May 9
PHX
Phoenix
IAD
Washington
$196 Roundtrip, found 16 hours ago
$196
Roundtrip
found 16 hours ago
Select Alaska Airlines flight, departing Wed, May 6 from Phoenix to Washington, returning Sat, May 9, priced at $196 found 16 hours ago
Frontier Airlines
Wed, Apr 15 - Wed, Apr 22
PHX
Phoenix
IAD
Washington
$200 Roundtrip, found 1 hour ago
$200
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Wed, Apr 15 from Phoenix to Washington, returning Wed, Apr 22, priced at $200 found 1 hour ago
Alaska Airlines
Thu, Apr 23 - Fri, Apr 24
PHX
Phoenix
IAD
Washington
$201 Roundtrip, found 11 hours ago
$201
Roundtrip
found 11 hours ago
Select Alaska Airlines flight, departing Thu, Apr 23 from Phoenix to Washington, returning Fri, Apr 24, priced at $201 found 11 hours ago
Frontier Airlines
Wed, Apr 1 - Wed, Apr 15
PHX
Phoenix
IAD
Washington
$201 Roundtrip, found 11 hours ago
$201
Roundtrip
found 11 hours ago
Select Frontier Airlines flight, departing Wed, Apr 1 from Phoenix to Washington, returning Wed, Apr 15, priced at $201 found 11 hours ago
Frontier Airlines
Wed, Apr 29 - Wed, May 6
PHX
Phoenix
IAD
Washington
$204 Roundtrip, found 6 hours ago
$204
Roundtrip
found 6 hours ago
Select Frontier Airlines flight, departing Wed, Apr 29 from Phoenix to Washington, returning Wed, May 6, priced at $204 found 6 hours ago
Frontier Airlines
Wed, Mar 11 - Tue, Mar 24
PHX
Phoenix
IAD
Washington
$209 Roundtrip, found 11 hours ago
$209
Roundtrip
found 11 hours ago
Select Frontier Airlines flight, departing Wed, Mar 11 from Phoenix to Washington, returning Tue, Mar 24, priced at $209 found 11 hours ago
Delta
Wed, Apr 8 - Wed, Apr 15
PHX
Phoenix
IAD
Washington
$224 Roundtrip, found 2 hours ago
$224
Roundtrip
found 2 hours ago
Select Delta flight, departing Wed, Apr 8 from Phoenix to Washington, returning Wed, Apr 15, priced at $224 found 2 hours ago
Hawaiian Airlines
Tue, Mar 31 - Tue, Apr 7
PHX
Phoenix
IAD
Washington
$227 Roundtrip, found 16 hours ago
$227
Roundtrip
found 16 hours ago
Select Hawaiian Airlines flight, departing Tue, Mar 31 from Phoenix to Washington, returning Tue, Apr 7, priced at $227 found 16 hours ago

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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. Closest option available. Average driving time to city center is 8 minutes. Flights from $290
DCA
Ronald Reagan Washington National
Closest
Average driving time to city center8 min
Flights from $290

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

August is typically the cheapest month to fly

From $135 - $385 per traveler.

Frequently asked questions

How much does a flight from Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.) cost?
You can find cheap one-way flights from $100 and cheap return flights from $190 Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.) with Expedia. One-way flights generally range between $196 and $1209, and roundtrip flights usually range from $373 to $2421. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
The cheapest month to fly from PHX to IAD is April when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you're able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
United offers around 17 weekly direct flights from PHX to IAD.
What is the cheapest airline that flies from Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
United is one of the cheapest airlines offering nonstop flights from Phoenix (PHX) to Washington, DC (IAD), with round-trip tickets starting from around $550. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
To find a cheap flight from Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
The best airline to fly with from Phoenix, AZ (PHX) to Washington, DC (IAD) will differ from traveler to traveler. If you like to fly early, United offers early morning flights. If price is the most important factor, United typically offers the lowest fares. United offers the most daily flights from Phoenix to Washington, DC, which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
There are approximately 3 nonstop flights per day from Sky Harbor Intl. (PHX) to Washington Dulles Intl. (IAD). For more options, look at flights that include layovers.
What is the earliest flight from Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
The earliest flight from Sky Harbor International Airport (PHX) to Washington Dulles International Airport (IAD) typically departs at 12:15 AM, operated by American Airlines. This seasonal service is available in October, allowing you to maximize your time in the nation's capital. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
The most popular departure times for flights from Sky Harbor Intl. (PHX) to Washington Dulles Intl. (IAD) are in the early morning, from 6am to 9am. About 31% of passengers prefer this time window. Many major carriers, including United Airlines and American Airlines, offer flights during this window. This timing is favored because it allows travelers to arrive in Washington, DC with plenty of time to start their day.
How long does it take to fly from Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
A nonstop flight from PHX to IAD typically takes around 4 hours 20 minutes, covering approximately 1,953 miles. Connecting flights on this route usually add 4 hours 10 minutes to your travel time. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
You can fly first class between PHX and IAD. First class cabins are available on:

  • United Airlines
  • American Airlines
  • Delta Air Lines

How much is a business class flight from Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
A direct, return business class ticket from Phoenix (PHX) to Washington, DC (IAD) typically costs between $1,731 - $2,356. A non-stop, one-way business class flight is usually around $772 - $819. Prices often fluctuate based on seasonality and how early you book. You may also be able to find a cheaper business class journey between Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.) if you opt for a connecting flight.*Prices based on flights available on Expedia in the last year.
How do I earn miles on a Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.) flight with Expedia?
It's easy to earn miles on a Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Washington from Sky Harbor Intl. (PHX)?
When traveling from Sky Harbor Intl. (PHX) to Washington, you can fly into Washington Dulles Intl. (IAD) and Ronald Reagan Washington National (DCA). Some flights may connect through major hubs like Portland Intl. (PDX), San Diego Intl. (SAN), BOI (BOI) before reaching Washington. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.) at the last minute?
Typically, booking a last minute flight from Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.) flight and hotel package?
Securing a Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.) Fairfax County Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
If you booked your Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

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
$190
Distance
1952 mi
Average flight time
7 hours 9 mins

Book with confidence

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 April. 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 2026. You can also book with separate airlines for your outbound and return journeys, from $100 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.

 

Phoenix to Washington Flights

*Flight schedules are subject to change.

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*Available to One Key members.