$108 Cheap Flights from Washington (IAD) to Phoenix (PHX)

View $108 flight on Sat, Nov 15, 2025Opens in a new window

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

  • Plan, book, fly with confidence

  • trending down icon
    Be in the know
    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon
    Book smarter
    Save up to 30% on select hotels after you book a flight*
  • one key icon
    Earn twice
    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from Washington to Phoenix (IAD-PHX)

Prices were available within the past 7 days and start at $108 for one-way flights and $159 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Thu, Jul 10 - Tue, Jul 22
IAD
Washington
PHX
Phoenix
$159 Roundtrip, found 4 days ago
$159
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Thu, Jul 10 from Washington to Phoenix, returning Tue, Jul 22, priced at $159 found 4 days ago
Frontier Airlines
Tue, Jul 22 - Thu, Aug 21
IAD
Washington
PHX
Phoenix
$165 Roundtrip, found 4 days ago
$165
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Tue, Jul 22 from Washington to Phoenix, returning Thu, Aug 21, priced at $165 found 4 days ago
Frontier Airlines
Tue, Jul 29 - Sat, Aug 9
IAD
Washington
PHX
Phoenix
$179 Roundtrip, found 4 days ago
$179
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Tue, Jul 29 from Washington to Phoenix, returning Sat, Aug 9, priced at $179 found 4 days ago
United
Tue, Jul 29 - Sat, Aug 9
IAD
Washington
PHX
Phoenix
$193 Roundtrip, found 4 days ago
$193
Roundtrip
found 4 days ago
Select United flight, departing Tue, Jul 29 from Washington to Phoenix, returning Sat, Aug 9, priced at $193 found 4 days ago
Frontier Airlines
Sat, Sep 13 - Fri, Sep 19
IAD
Washington
PHX
Phoenix
$201 Roundtrip, found 1 day ago
$201
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Sat, Sep 13 from Washington to Phoenix, returning Fri, Sep 19, priced at $201 found 1 day ago
Delta
Tue, Jul 29 - Sat, Aug 9
IAD
Washington
PHX
Phoenix
$202 Roundtrip, found 4 days ago
$202
Roundtrip
found 4 days ago
Select Delta flight, departing Tue, Jul 29 from Washington to Phoenix, returning Sat, Aug 9, priced at $202 found 4 days ago
Frontier Airlines
Sat, Sep 13 - Thu, Sep 18
IAD
Washington
PHX
Phoenix
$212 Roundtrip, found 1 day ago
$212
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Sat, Sep 13 from Washington to Phoenix, returning Thu, Sep 18, priced at $212 found 1 day ago
Frontier Airlines
Mon, Aug 25 - Fri, Sep 5
IAD
Washington
PHX
Phoenix
$213 Roundtrip, found 19 hours ago
$213
Roundtrip
found 19 hours ago
Select Frontier Airlines flight, departing Mon, Aug 25 from Washington to Phoenix, returning Fri, Sep 5, priced at $213 found 19 hours ago
Southwest Airlines
Sat, Oct 11 - Sat, Oct 18
IAD
Washington
PHX
Phoenix
$239 Roundtrip, just found
$239
Roundtrip
just found
Select Southwest Airlines flight, departing Sat, Oct 11 from Washington to Phoenix, returning Sat, Oct 18, priced at $239 just found
Sun Country Airlines
Fri, Oct 31 - Thu, Nov 13
IAD
Washington
AZA
Mesa
$302 Roundtrip, found 2 days ago
$302
Roundtrip
found 2 days ago
Select Sun Country Airlines flight, departing Fri, Oct 31 from Washington to Mesa, returning Thu, Nov 13, priced at $302 found 2 days ago

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

May is typically the cheapest month to fly

From $160 - $291 per traveler.

Graph displaying average flight prices per month

Alternative airports near Phoenix

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

Select flight to Sky Harbor Intl. PHX. Cheapest and Closest option available. Average driving time to city center is 10 minutes. Flights from $304
PHX
Sky Harbor Intl.
CheapestClosest
Average driving time to city center10 min
Flights from $304
Flights from Washington (IAD) to Phoenix (PHX)
Origin airport
Washington Dulles Intl.
Destination airport
Sky Harbor Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Hawaiian Airlines, Southwest Airlines, Sun Country Airlines, United
Roundtrip price
$159
Distance
1952 mi
Average flight time
1 hour 48 mins

Washington to Phoenix Flights

The cheapest times to fly from Washington to Phoenix

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 Washington to Phoenix are during the month of July. You can find some of the cheapest flights from Washington to Phoenix with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Washington to Phoenix

Sunday is one of the best days to book for cheap flights from Washington to Phoenix: 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 Washington to Phoenix

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 Washington to Phoenix in 2025. You can also book with separate airlines for your outbound and return journeys, from $108 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 Washington to Phoenix 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 Washington to Phoenix 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 Washington Dulles Intl. Airport (IAD) to Sky Harbor Intl. Airport (PHX) cost?
You can book cheap return fares starting at $239 from Washington Dulles Intl. Airport (IAD) to Sky Harbor Intl. Airport (PHX). 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 IAD on July 25 2025 and touching down at PHX. The price was last updated on June 30 2025 and has not changed since.
What is the cheapest month to fly from IAD to PHX?
The cheapest flights from IAD to PHX 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 Washington Dulles Intl. Airport (IAD) to Sky Harbor Intl. Airport (PHX)?
If you're departing from Washington Dulles Intl. Airport (IAD), you can jump on a direct flight to Sky Harbor Intl. Airport (PHX) with United Airlines.
What is the cheapest airline that flies from IAD to PHX?
Travel from IAD to PHX with Southwest Airlines. This carrier currently has the lowest one-way fare on this route, starting from $120. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from IAD on September 23 2025. Prices were last updated on June 30 2025 and have not changed since.
How many flights per day from Washington Dulles Intl. Airport (IAD) to Sky Harbor Intl. Airport (PHX)?
Every day, an average of 2 direct flights take off from Washington Dulles Intl. Airport (IAD) to Sky Harbor Intl. Airport (PHX). Select the departure date that best fits your itinerary.
What are the most popular departure times for flights from Washington Dulles Intl. Airport (IAD) to Sky Harbor Intl. Airport (PHX)?
The 5 PM departures from IAD to PHX are the busiest. These flights can come with a higher price due to their popularity. If you want to save on your fare, choose a less crowded time to fly.
What day of the week has the most flights from IAD to PHX?
If you travel on a Friday, you'll get the biggest range of options for flights from Washington Dulles Intl. Airport (IAD) to Sky Harbor Intl. Airport (PHX).
What is the earliest flight from Washington Dulles Intl. Airport (IAD) to Sky Harbor Intl. Airport (PHX)?
Washington Dulles Intl. Airport (IAD)'s earliest flight to Sky Harbor Intl. Airport (PHX) is at approximately 12:50PM UTC-5. With a travel duration of 5h 9m, you'll arrive at around 3:59PM UTC-7.
How long does it take to fly from Washington Dulles Intl. Airport (IAD) to Sky Harbor Intl. Airport (PHX)?
The average flight duration from IAD to PHX is 5 hours and 9 minutes, covering a distance of 1,950 mi.
What airline has the least delays from IAD to PHX?
With 94% of flights usually landing on time, Lufthansa has the best on-time performance for nonstop flights from Washington Dulles Intl. Airport (IAD) to Sky Harbor Intl. Airport (PHX). To monitor your flight status and get notified if anything changes, simply head to the Expedia App.
What is the best time to fly from Washington Dulles Intl. Airport (IAD) to Sky Harbor Intl. Airport (PHX)?
To land at Sky Harbor Intl. Airport (PHX) on schedule, pick a flight that leaves Washington Dulles Intl. Airport (IAD) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**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 Phoenix from Washington Dulles Intl. Airport (IAD)?
If you're traveling on a direct flight from Washington Dulles Intl. Airport (IAD) to Phoenix, Sky Harbor Intl. Airport (PHX) is the only airport you can touch down at.
Is it cheaper to buy a plane ticket from Washington Dulles Intl. Airport (IAD) to Sky Harbor Intl. Airport (PHX) last-minute?
Last-minute fares from IAD to PHX are usually more expensive. To lock in the lowest rates, start searching for flights ahead of time. That being said, if you can play around with your travel dates, you may score a cheap fare right before you leave.
Is it cheaper to book an IAD to PHX flight and hotel package?
You can save money by booking an IAD to PHX flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage everything in one convenient place. After selecting your preferred flights and accommodations, consider other add-ons like activities, tours and car rentals.
Can I cancel or change the date of my flight from Washington Dulles Intl. Airport (IAD) to Sky Harbor Intl. Airport (PHX)?
Generally, it's possible to cancel or reschedule your IAD to PHX flight. However, for bookings made more than 24 hours ago, additional fees may apply. Check your airline's policies in your itinerary to see what changes are allowed and if any costs are involved. You'll also find more details on our Customer Service portal.

Explore a world of travel with Expedia

*Available to One Key members.