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£119 Cheap Flights from Phoenix (PHX) to Washington (IAD)

View £119 flight on Sat, 12 Sept 2026Opens in a new window

Popular airlines from Sky Harbor International Airport (PHX) to Washington Dulles International Airport (IAD)

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

Prices were available within the past 7 days and start at £119 for one-way flights and £243 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Wed, 16 Sept - Tue, 22 Sept
PHX
Phoenix
IAD
Washington
£243 Return, found 3 days ago
£243
Return
found 3 days ago
Select Alaska Airlines flight, departing Wed, 16 Sept from Phoenix to Washington, returning Tue, 22 Sept, priced at £243 found 3 days ago
Alaska Airlines
Wed, 23 Sept - Tue, 29 Sept
PHX
Phoenix
IAD
Washington
£260 Return, found 5 days ago
£260
Return
found 5 days ago
Select Alaska Airlines flight, departing Wed, 23 Sept from Phoenix to Washington, returning Tue, 29 Sept, priced at £260 found 5 days ago
Alaska Airlines
Thu, 1 Oct - Sun, 4 Oct
PHX
Phoenix
IAD
Washington
£263 Return, found 4 days ago
£263
Return
found 4 days ago
Select Alaska Airlines flight, departing Thu, 1 Oct from Phoenix to Washington, returning Sun, 4 Oct, priced at £263 found 4 days ago
Alaska Airlines
Tue, 27 Oct - Sat, 31 Oct
PHX
Phoenix
IAD
Washington
£267 Return, found 6 days ago
£267
Return
found 6 days ago
Select Alaska Airlines flight, departing Tue, 27 Oct from Phoenix to Washington, returning Sat, 31 Oct, priced at £267 found 6 days ago
Alaska Airlines
Wed, 23 Sept - Tue, 29 Sept
PHX
Phoenix
IAD
Washington
£268 Return, found 5 days ago
£268
Return
found 5 days ago
Select Alaska Airlines flight, departing Wed, 23 Sept from Phoenix to Washington, returning Tue, 29 Sept, priced at £268 found 5 days ago
Alaska Airlines
Thu, 24 Sept - Tue, 29 Sept
PHX
Phoenix
IAD
Washington
£269 Return, found 4 days ago
£269
Return
found 4 days ago
Select Alaska Airlines flight, departing Thu, 24 Sept from Phoenix to Washington, returning Tue, 29 Sept, priced at £269 found 4 days ago
Alaska Airlines
Thu, 1 Oct - Sun, 4 Oct
PHX
Phoenix
IAD
Washington
£271 Return, found 4 days ago
£271
Return
found 4 days ago
Select Alaska Airlines flight, departing Thu, 1 Oct from Phoenix to Washington, returning Sun, 4 Oct, priced at £271 found 4 days ago
Alaska Airlines
Wed, 16 Sept - Tue, 22 Sept
PHX
Phoenix
IAD
Washington
£281 Return, found 3 days ago
£281
Return
found 3 days ago
Select Alaska Airlines flight, departing Wed, 16 Sept from Phoenix to Washington, returning Tue, 22 Sept, priced at £281 found 3 days ago
Alaska Airlines
Thu, 1 Oct - Sun, 4 Oct
PHX
Phoenix
IAD
Washington
£282 Return, found 4 days ago
£282
Return
found 4 days ago
Select Alaska Airlines flight, departing Thu, 1 Oct from Phoenix to Washington, returning Sun, 4 Oct, priced at £282 found 4 days ago
Alaska Airlines
Tue, 15 Sept - Tue, 22 Sept
PHX
Phoenix
IAD
Washington
£287 Return, found 8 hours ago
£287
Return
found 8 hours ago
Select Alaska Airlines flight, departing Tue, 15 Sept from Phoenix to Washington, returning Tue, 22 Sept, priced at £287 found 8 hours ago

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

September is typically the cheapest month to fly

From £178 - £265 per traveller.

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 one-way and return flights from PHX to IAD with Expedia. 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 our cheapest fares first, and use the Price Tracking tool to receive alerts when PHX to IAD ticket fares go up or down.
What is the cheapest month to fly from Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
The cheapest months to fly from PHX to IAD are typically during off-peak season 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 are 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.)?
There are 2 airlines offering direct flights from Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.). Here are the carriers:
  • United operates 10 direct flights from Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.) every week.
  • Southwest Airlines operates 7 direct flights from Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.) every week.
How do I find cheap flights from Phoenix, AZ (PHX) to Washington, DC (IAD)?
To find a cheap flight from Phoenix, AZ (PHX) to Washington, DC (IAD), 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 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.
What is the earliest flight from Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
The earliest flight from Phoenix Sky Harbor International Airport (PHX) to Washington Dulles International Airport (IAD) typically departs around 12:10 AM local time. This flight is operated by American Airlines and is a seasonal service, active only in May. An early departure like this can help you make the most of your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
How long does it take to fly from Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
When flying from Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.), you have a few options. A non-stop flight typically takes around 4 hours 18 minutes, covering a distance of approximately 3,143 kilometers. If you opt for a one-stop flight, your journey will usually be longer, averaging about 7 hours 30 minutes. Flights with two or more stops will take even more time, typically around 12 hours. Keep in mind that actual flight times can vary due to factors like wind patterns and air traffic, so it's always a good idea to allow for some flexibility in your travel plans.
Can you fly business or first class from Phoenix, AZ (PHX) to Washington, DC (IAD)?
Select the "Business class" and "First class" filters when looking for Phoenix, AZ (PHX) to Washington, DC (IAD) flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
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, DC (IAD) from Phoenix, AZ (PHX)?
If you're planning to travel to Washington from Sky Harbor Intl. (PHX), you can fly directly into Washington Dulles Intl. (IAD). Some flights may connect through major hubs like Portland Intl. (PDX), San Diego Intl. (SAN), or Boise, ID (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.) flight and hotel package 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) to Washington, DC (IAD)?
If you booked your Phoenix, AZ (PHX) to Washington, DC (IAD) 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
Return price
£242
Distance
3123 km
Average flight time
8 hours 54 mins

Book with confidence

Compare flights from Phoenix to Washington easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Phoenix to Washington. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Washington Dulles Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Sky Harbor Intl. to Washington Dulles Intl..  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Sky Harbor Intl. (PHX) to Washington Dulles Intl. (IAD)

The easiest way to view the best deals on flights from Phoenix to Washington today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Sky Harbor Intl. to Washington Dulles Intl. start at just £243 and range up to £287.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Phoenix and Washington
  • booking your flight during September, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your Phoenix to Washington flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Sky Harbor Intl. to Washington Dulles Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from Phoenix to Washington easily and book with confidence

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*Available to Expedia members.