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$167+ Cheap flights from Dulles Intl (IAD) to Phoenix

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/13. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — PHX
Aug 7 — Aug 141
Fri 8/7
Fri 8/14
1 adult, Economy
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Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to Phoenix are usually found in August or November, booked 49 days in advance, depart on a Saturday or Wednesday and return on a Friday

Cheap flight deals from Dulles Intl to Phoenix

Cheapest flights from Dulles Intl to Phoenix
Explore the most affordable flight options available from Dulles Intl to Phoenix. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 8, 2026.

This Delta deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/216:10 am
IAD
-
PHX
1 stop6h 51m
Delta
Fri 8/213:00 pm
PHX
-
IAD
1 stop6h 34m
Delta
Deal found 7/7$331
This CheapOair deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/137:47 pm
IAD
-
PHX
1 stop18h 44m
Alaska Airlines
Wed 9/167:08 am
PHX
-
IAD
1 stop8h 06m
Alaska Airlines
Deal found 7/7$333
This Orbitz deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/287:53 pm
IAD
-
PHX
1 stop19h 30m
Multiple Airlines
Mon 8/39:58 pm
PHX
-
IAD
1 stop7h 22m
Multiple Airlines
Deal found 7/7$334
This United Airlines deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/26:00 pm
IAD
-
PHX
Nonstop4h 54m
United Airlines
Tue 10/2012:15 pm
PHX
-
IAD
1 stop7h 15m
United Airlines
Deal found 7/3$335
This Kiwi.com deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1011:10 am
IAD
-
PHX
2 stops28h 49m
Frontier
Fri 8/144:39 pm
PHX
-
IAD
1 stop25h 33m
Frontier
Deal found 7/3$336
This Frontier deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/246:20 am
IAD
-
PHX
1 stop7h 54m
Frontier
Thu 8/2710:30 pm
PHX
-
IAD
1 stop6h 34m
Frontier
Deal found 7/3$338
This United Airlines deal was found by Cheapflights users on 7/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/276:00 pm
IAD
-
PHX
Nonstop4h 54m
United Airlines
Mon 8/3111:32 am
PHX
-
IAD
1 stop8h 47m
United Airlines
Deal found 7/5$339
This Frontier deal was found by Cheapflights users on 7/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/28:59 am
IAD
-
PHX
1 stop7h 00m
Frontier
Mon 9/712:19 pm
PHX
-
IAD
1 stop7h 33m
Frontier
Deal found 7/6$340
This Alaska Airlines deal was found by Cheapflights users on 7/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/37:00 am
IAD
-
PHX
1 stop11h 12m
Alaska Airlines
Tue 10/69:02 am
PHX
-
IAD
1 stop11h 57m
Alaska Airlines
Deal found 7/6$341
This Kiwi.com deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/13:53 pm
IAD
-
PHX
1 stop18h 38m
Multiple Airlines
Mon 10/510:55 pm
PHX
-
IAD
2 stops15h 41m
Multiple Airlines
Deal found 7/3$342
This Booking.com deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/66:46 pm
IAD
-
PHX
1 stop7h 13m
Frontier
Thu 8/136:24 am
PHX
-
IAD
1 stop8h 37m
Frontier
Deal found 7/7$343
This Frontier deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/166:46 pm
IAD
-
PHX
1 stop7h 13m
Frontier
Thu 8/206:00 am
PHX
-
IAD
1 stop9h 29m
Frontier
Deal found 7/8$344

Find flight deals from Dulles Intl to Phoenix

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Phoenix (PH1). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 8, 2026.

Round-trip from

$331
(Delta)

One-way from

$167
(Super.com)

Popular in

March

Cheapest in

August

Average price

$474
From Washington, D.C. Dulles Intl to Phoenix
Search Deals
One-way flight from Washington, D.C. Dulles Intl to Phoenix
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($39 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in July 2026
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl to Phoenix that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 8, 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Phoenix that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Thu 10/1

1:10 pm-5:35 pm

1 stop7h 25m

Phoenix Sky Harbor Intl

Mon 10/5

2:05 pm-9:27 pm

Nonstop4h 22m

$339

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Thu 9/3

12:29 pm-8:02 pm

1 stop10h 33m

Phoenix Sky Harbor Intl

Mon 9/7

11:56 pm-11:31 am

1 stop8h 35m

$349

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Fri 10/2

5:12 pm-10:42 pm

1 stop8h 30m

Phoenix Sky Harbor Intl

Tue 10/6

6:00 am-4:21 pm

1 stop7h 21m

$349

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Sun 11/22

1:00 pm-6:36 pm

1 stop7h 36m

Phoenix Sky Harbor Intl

Wed 12/2

1:05 pm-9:12 pm

1 stop6h 07m

$349

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Fri 8/7

5:47 pm-10:41 pm

1 stop7h 54m

Phoenix Sky Harbor Intl

Fri 8/14

11:56 pm-10:04 am

1 stop7h 08m

$349

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Thu 9/24

3:15 pm-9:26 pm

1 stop9h 11m

Phoenix Sky Harbor Intl

Sun 9/27

11:05 pm-10:21 am

1 stop8h 16m

$349
Quickest round-trip

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Sat 10/3

6:00 pm-7:54 pm

Nonstop4h 54m

Phoenix Sky Harbor Intl

Sat 10/10

8:45 am-4:13 pm

Nonstop4h 28m

$371

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Thu 9/24

7:47 pm-11:31 am

1 stop18h 44m

Phoenix Sky Harbor Intl

Sun 9/27

7:49 pm-6:14 pm

1 stop19h 25m

$410

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Wed 9/30

6:00 pm-7:54 pm

Nonstop4h 54m

Phoenix Sky Harbor Intl

Thu 10/8

12:15 pm-12:30 am

1 stop9h 15m

$413

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Wed 8/19

6:00 pm-7:54 pm

Nonstop4h 54m

Phoenix Sky Harbor Intl

Mon 8/24

8:55 am-4:23 pm

Nonstop4h 28m

$429

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/4

Showing 1-10 of 24 resultsSorted by cheapest first
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3

Best time to book a flight from Dulles Intl to Phoenix

Have a flexible travel schedule? Discover the best time to fly to Phoenix from Dulles Intl with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. Dulles Intl Airport to Phoenix

What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to Phoenix?

Currently, August is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Phoenix (average of $153). Flying from Washington, D.C. Dulles Intl Airport to Phoenix in March is currently the most expensive (average of $239). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from IAD to PHX?

Find hourly flight availability from Dulles Intl to Phoenix. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 8, 2026.

It’s typically best to fly out from Washington, D.C. Dulles Intl Airport to Phoenix in the afternoon. Doing so could potentially save you 17% on the flight price compared to flying in the evening, which is usually more expensive.

Weekly flight availability from Washington, D.C. Dulles Intl Airport to Phoenix

Explore weekly flight availability from Dulles Intl to Phoenix. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated July 8, 2026.

The most flights from IAD to PH1 are scheduled on a Monday (5 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (5 on average).

How much does it cost to fly round-trip from Washington, D.C. Dulles Intl Airport to Phoenix?

How far ahead should I book a flight from Washington, D.C. Dulles Intl Airport to Phoenix?

The best time to book flights from Washington, D.C. Dulles Intl Airport to Phoenix is 48 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest day to fly from Washington, D.C. Dulles Intl Airport to Phoenix?

Use this chart to determine the cheapest time to fly round-trip from Dulles Intl to Phoenix. Price data was last updated on July 4, 2026.

Travelers seeking maximum savings on their Washington, D.C. Dulles Intl Airport to Phoenix flight should consider departing on Tuesday at noon when fares are most often at their lowest. Tuesday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Phoenix

Get insights into the airlines that provide service to Phoenix. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Phoenix. Reviews last updated July 8, 2026.
Read reviews from past customers who have flown Southwest,Delta, andUnited Airlines from Washington, D.C. Dulles Intl Airport to Phoenix. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
7.9
Good
4,249 reviews

Food

7.0

Crew

8.6

Comfort

8.0

Overall

7.9

Entertainment

7.5

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Sherrie,Jan 2024

LAX - PHX

It was a great flight overall. It took a long time to take off. We spent a long time waiting on the plane before departure.
Southwest
7.9
Good
4,249 reviews
Southwest
7.9
Good
4,249 reviews

Food

7.0

Crew

8.6

Comfort

8.0

Overall

7.9

Entertainment

7.5

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Sherrie,Jan 2024

LAX - PHX

It was a great flight overall. It took a long time to take off. We spent a long time waiting on the plane before departure.
Delta
7.8
Good
8,450 reviews
Southwest
7.9
Good
4,249 reviews

Food

7.0

Crew

8.6

Comfort

8.0

Overall

7.9

Entertainment

7.5

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Sherrie,Jan 2024

LAX - PHX

It was a great flight overall. It took a long time to take off. We spent a long time waiting on the plane before departure.
United Airlines
7.4
Good
9,948 reviews
Southwest
7.9
Good
4,249 reviews

Food

7.0

Crew

8.6

Comfort

8.0

Overall

7.9

Entertainment

7.5

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Sherrie,Jan 2024

LAX - PHX

It was a great flight overall. It took a long time to take off. We spent a long time waiting on the plane before departure.
American Airlines
7.1
Good
11,783 reviews
Southwest
7.9
Good
4,249 reviews

Food

7.0

Crew

8.6

Comfort

8.0

Overall

7.9

Entertainment

7.5

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Sherrie,Jan 2024

LAX - PHX

It was a great flight overall. It took a long time to take off. We spent a long time waiting on the plane before departure.
Frontier
5.6
Fair
2,835 reviews
Southwest
7.9
Good
4,249 reviews

Food

7.0

Crew

8.6

Comfort

8.0

Overall

7.9

Entertainment

7.5

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Sherrie,Jan 2024

LAX - PHX

It was a great flight overall. It took a long time to take off. We spent a long time waiting on the plane before departure.

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to Phoenix. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Washington, D.C. Dulles Intl Airport to Phoenix?

    United Airlines and Delta can get you from Washington, D.C. Dulles Intl Airport to Phoenix in just under 7h 25m. Your travel time can differ by up to 3h 08m. There are 1950 mi between Washington, D.C. Dulles Intl Airport and Phoenix. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Washington, D.C. Dulles Intl Airport to Phoenix round-trip?

    According to our current data, Frontier ($163), Southwest ($229), and Delta ($243) offers the cheapest pricing from Washington, D.C. Dulles Intl Airport to Phoenix. Frontier is currently priced 64% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Washington, D.C. Dulles Intl Airport to Phoenix one-way?

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $95. Users have also found prices from $108 and $113 on Alaska Airlines and Southwest, respectively.

  • What are the most reliable airlines from Washington, D.C. Dulles Intl Airport to Phoenix?

    The top 3 most reliable airlines when flying from Washington, D.C. Dulles Intl Airport to Phoenix are United Airlines (93%), Austrian Airlines (85%) and Avianca (85%).

  • What are the cheapest flights from Washington, D.C. Dulles Intl Airport to Phoenix?

    While on average a flight from Washington, D.C. Dulles Intl Airport to Phoenix is generally $610, our data shows the cheapest flight currently is $203. When looking at the most popular route, (Washington, D.C. Dulles Intl - Phoenix Sky Harbor Intl), you can expect to pay $277 for that flight.

  • Can I find deals for flights from Dulles Intl to Phoenix that include hotel bookings?

    Yes. In addition to deals on Dulles Intl to Phoenix flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Dulles Intl to Phoenix?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to Phoenix.

  • Can I find deals for business class flights from Dulles Intl to Phoenix?

    Yes. Cheapflights offers flight deals from Dulles Intl to Phoenix by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to Phoenix?

    Currently, August is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Phoenix (average of $153). Flying from Washington, D.C. Dulles Intl Airport to Phoenix in March is currently the most expensive (average of $239). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top 6 airlines flying from Dulles Intl to Phoenix

Discover the top 6 airlines that operate flights from Dulles Intl to Phoenix. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 8, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$163Average$279FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$229Average$463FlexibilityNo cancel feeOn-time63%
DeltaCheapest$243Average$338FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$252Average$326FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$284Average$489FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$376Average$580FlexibilityNo cancel feeOn-time71%

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