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$172+ 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 8/11. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — PHX
Jul 21 — Jul 281
Tue 7/21
Tue 7/28
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 June 21, 2026.

This Alaska Airlines deal was found by Cheapflights users on 6/19. 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.
Mon 9/147:47 pm
IAD
-
PHX
1 stop18h 44m
Alaska Airlines
Mon 9/217:49 pm
PHX
-
IAD
1 stop19h 25m
Alaska Airlines
Deal found 6/19$319
This Frontier deal was found by Cheapflights users on 6/20. 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.
Tue 9/18:59 am
IAD
-
PHX
1 stop7h 00m
Frontier
Sun 9/66:00 am
PHX
-
IAD
1 stop9h 29m
Frontier
Deal found 6/20$320
This Kiwi.com deal was found by Cheapflights users on 6/19. 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.
Sun 7/269:50 am
IAD
-
PHX
1 stop16h 15m
Frontier
Fri 8/712:12 am
PHX
-
IAD
1 stop9h 14m
Frontier
Deal found 6/19$321
This Kiwi.com deal was found by Cheapflights users on 6/16. 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.
Wed 7/159:50 am
IAD
-
PHX
1 stop16h 15m
Multiple Airlines
Sun 7/194:20 pm
PHX
-
IAD
1 stop19h 06m
Multiple Airlines
Deal found 6/16$323
This CheapOair deal was found by Cheapflights users on 6/21. 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.
Wed 8/59:50 am
IAD
-
PHX
1 stop28h 37m
Frontier
Sat 8/156:24 am
PHX
-
IAD
1 stop11h 48m
Frontier
Deal found 6/21$324
This Alaska Airlines deal was found by Cheapflights users on 6/16. 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 10/35:33 pm
IAD
-
PHX
1 stop19h 58m
Alaska Airlines
Tue 10/67:36 am
PHX
-
IAD
1 stop7h 17m
Alaska Airlines
Deal found 6/16$325
This Kiwi.com deal was found by Cheapflights users on 6/16. 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.
Fri 7/311:17 am
IAD
-
PHX
1 stop14h 03m
Multiple Airlines
Thu 7/234:20 pm
PHX
-
IAD
1 stop19h 06m
Multiple Airlines
Deal found 6/16$326
This Kiwi.com deal was found by Cheapflights users on 6/19. 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.
Sun 7/269:50 am
IAD
-
PHX
1 stop16h 15m
Frontier
Thu 8/69:58 pm
PHX
-
IAD
1 stop7h 22m
Frontier
Deal found 6/19$327
This Kiwi.com deal was found by Cheapflights users on 6/16. 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.
Sat 7/258:00 pm
IAD
-
PHX
1 stop19h 23m
Multiple Airlines
Thu 8/69:58 pm
PHX
-
IAD
1 stop7h 22m
Multiple Airlines
Deal found 6/16$328
This United Airlines deal was found by Cheapflights users on 6/16. 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 8/75:50 pm
IAD
-
PHX
Nonstop4h 56m
United Airlines
Fri 8/148:55 am
PHX
-
IAD
Nonstop4h 28m
United Airlines
Deal found 6/16$329
This Kiwi.com deal was found by Cheapflights users on 6/19. 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.
Wed 7/111:17 am
IAD
-
PHX
1 stop14h 03m
Frontier
Mon 7/202:16 pm
PHX
-
IAD
2 stops15h 04m
Frontier
Deal found 6/19$330
This Kiwi.com deal was found by Cheapflights users on 6/16. 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.
Sat 7/46:46 am
IAD
-
PHX
1 stop18h 34m
Frontier
Tue 7/79:58 pm
PHX
-
IAD
1 stop7h 22m
Frontier
Deal found 6/16$331

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 June 21, 2026.

Round-trip from

$317
(Frontier)

One-way from

$172
(Kiwi.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. 10% potential increase in price ($49 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 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 June 21, 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

Mon 8/10

5:50 pm-7:46 pm

Nonstop4h 56m

Phoenix Sky Harbor Intl

Mon 8/17

2:26 pm-12:44 am

1 stop7h 18m

$339

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Fri 7/24

5:46 pm-9:34 pm

1 stop6h 48m

Phoenix Sky Harbor Intl

Mon 8/3

11:56 pm-9:20 am

1 stop6h 24m

$349

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Fri 9/18

6:30 am-10:22 am

1 stop6h 52m

Phoenix Sky Harbor Intl

Sat 9/19

8:55 am-4:23 pm

Nonstop4h 28m

$369

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Thu 10/22

3:02 pm-7:28 pm

1 stop7h 26m

Phoenix Sky Harbor Intl

Mon 11/2

2:46 pm-11:05 pm

1 stop6h 19m

$382

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Wed 7/1

8:29 am-12:12 pm

1 stop6h 43m

Phoenix Sky Harbor Intl

Wed 7/8

5:45 am-4:46 pm

1 stop8h 01m

$384

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Fri 7/17

5:50 pm-7:46 pm

Nonstop4h 56m

Phoenix Sky Harbor Intl

Mon 7/20

6:59 pm-5:27 am

1 stop7h 28m

$390
Quickest round-trip

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Fri 10/23

8:51 am-10:42 am

Nonstop4h 51m

Phoenix Sky Harbor Intl

Sat 10/31

8:30 am-3:45 pm

Nonstop4h 15m

$400

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Sat 11/21

5:00 pm-11:22 pm

1 stop8h 22m

Phoenix Sky Harbor Intl

Thu 11/26

12:55 am-11:33 am

1 stop8h 38m

$429

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Wed 7/1

6:00 am-12:12 pm

1 stop9h 12m

Phoenix Sky Harbor Intl

Sun 7/5

11:59 pm-9:21 am

1 stop6h 22m

$433

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Sat 10/17

8:35 am-10:26 am

Nonstop4h 51m

Phoenix Sky Harbor Intl

Sat 10/24

12:15 pm-10:30 pm

1 stop7h 15m

$435

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/17

Showing 1-10 of 24 resultsSorted by cheapest first
1
2
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 June 21, 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 18% 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 June 21, 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 June 20, 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 June 21, 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
4,242 reviews

Entertainment

7.5

Food

7.0

Overall

7.9

Comfort

8.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
6.0
Good

Reza,Jun 2026

TPA - MDW

The seats were super cramped and couldn’t move without hitting other passengers
Southwest
7.9
Good
4,242 reviews
Southwest
7.9
Good
4,242 reviews

Entertainment

7.5

Food

7.0

Overall

7.9

Comfort

8.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
6.0
Good

Reza,Jun 2026

TPA - MDW

The seats were super cramped and couldn’t move without hitting other passengers
Delta
7.8
Good
8,423 reviews
Southwest
7.9
Good
4,242 reviews

Entertainment

7.5

Food

7.0

Overall

7.9

Comfort

8.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
6.0
Good

Reza,Jun 2026

TPA - MDW

The seats were super cramped and couldn’t move without hitting other passengers
United Airlines
7.4
Good
9,868 reviews
Southwest
7.9
Good
4,242 reviews

Entertainment

7.5

Food

7.0

Overall

7.9

Comfort

8.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
6.0
Good

Reza,Jun 2026

TPA - MDW

The seats were super cramped and couldn’t move without hitting other passengers
American Airlines
7.1
Good
11,723 reviews
Southwest
7.9
Good
4,242 reviews

Entertainment

7.5

Food

7.0

Overall

7.9

Comfort

8.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
6.0
Good

Reza,Jun 2026

TPA - MDW

The seats were super cramped and couldn’t move without hitting other passengers
Frontier
5.6
Fair
2,876 reviews
Southwest
7.9
Good
4,242 reviews

Entertainment

7.5

Food

7.0

Overall

7.9

Comfort

8.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
6.0
Good

Reza,Jun 2026

TPA - MDW

The seats were super cramped and couldn’t move without hitting other passengers

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 4h 56m. Your travel time can differ by up to 1h 52m. 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 63% 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 (92%), Austrian Airlines (90%) and Avianca (90%).

  • 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 $913, our data shows the cheapest flight currently is $184. When looking at the most popular route, (Washington, D.C. Dulles Intl - Phoenix Sky Harbor Intl), you can expect to pay $233 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 June 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$163Average$278FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$229Average$460FlexibilityNo cancel feeOn-time63%
DeltaCheapest$243Average$338FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$252Average$326FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$284Average$484FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$376Average$580FlexibilityNo cancel feeOn-time71%

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