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$124+ 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 3/15. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — PHX
Mar 10 — Mar 171
Tue 3/10
Tue 3/17
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 July, booked 88 days in advance, depart on a Wednesday or Tuesday 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 February 8, 2026.

This Kiwi.com deal was found by Cheapflights users on 2/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/248:00 am
IAD
-
PHX
1 stop10h 21m
Multiple Airlines
Thu 2/265:05 am
PHX
-
IAD
1 stop10h 52m
Multiple Airlines
Deal found 2/5$271
This Delta deal was found by Cheapflights users on 2/5. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/75:25 pm
IAD
-
PHX
1 stop8h 17m
Delta
Tue 3/1011:55 pm
PHX
-
IAD
1 stop6h 15m
Delta
Deal found 2/5$273
This Kiwi.com deal was found by Cheapflights users on 2/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/166:20 am
IAD
-
PHX
1 stop18h 03m
Frontier
Mon 4/2010:30 pm
PHX
-
IAD
1 stop23h 06m
Frontier
Deal found 2/5$274
This Kiwi.com deal was found by Cheapflights users on 2/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/239:51 am
IAD
-
PHX
1 stop8h 35m
Frontier
Mon 4/2710:30 pm
PHX
-
IAD
1 stop23h 06m
Frontier
Deal found 2/7$275
This Expedia deal was found by Cheapflights users on 2/5. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/115:35 am
IAD
-
PHX
1 stop13h 34m
Frontier
Wed 4/158:00 am
PHX
-
IAD
1 stop13h 36m
Frontier
Deal found 2/5$276
This Kiwi.com deal was found by Cheapflights users on 2/4. 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 3/78:09 am
IAD
-
PHX
1 stop18h 35m
Frontier
Tue 3/106:45 pm
PHX
-
IAD
2 stops26h 46m
Frontier
Deal found 2/4$277
This Expedia deal was found by Cheapflights users on 2/7. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/287:05 am
IAD
-
PHX
1 stop12h 39m
Multiple Airlines
Mon 3/26:00 am
PHX
-
IAD
1 stop8h 08m
Multiple Airlines
Deal found 2/7$278
This Expedia deal was found by Cheapflights users on 2/7. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/147:00 am
IAD
-
PHX
2 stops15h 58m
Multiple Airlines
Fri 4/1710:30 pm
PHX
-
IAD
1 stop8h 24m
Multiple Airlines
Deal found 2/7$279
This CheapOair deal was found by Cheapflights users on 2/8. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/98:09 am
IAD
-
PHX
1 stop18h 35m
Frontier
Mon 3/168:42 am
PHX
-
IAD
1 stop12h 49m
Frontier
Deal found 2/8$280
This Kiwi.com deal was found by Cheapflights users on 2/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/108:00 am
IAD
-
PHX
1 stop10h 21m
Multiple Airlines
Thu 3/128:42 am
PHX
-
IAD
1 stop12h 49m
Multiple Airlines
Deal found 2/7$281
This Kiwi.com deal was found by Cheapflights users on 2/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/116:20 am
IAD
-
PHX
2 stops10h 41m
Frontier
Thu 3/198:42 am
PHX
-
IAD
1 stop12h 49m
Frontier
Deal found 2/7$282
This Expedia deal was found by Cheapflights users on 2/7. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/226:20 am
IAD
-
PHX
1 stop14h 09m
Multiple Airlines
Mon 4/276:37 am
PHX
-
IAD
1 stop8h 04m
Multiple Airlines
Deal found 2/7$283

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 February 8, 2026.

Round-trip from

$271
(Kiwi.com)

One-way from

$124
(Kiwi.com)

Popular in

December

Cheapest in

August

Average price

$412
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. 5% potential increase in price ($24 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
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Average for round-trip flights in February 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 February 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

Dulles Intl

Fly to

Phoenix

Route

Depart

Return

Price

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Sat 5/23

5:30 pm-10:36 pm

1 stop8h 06m

Phoenix Sky Harbor Intl

Tue 5/26

10:55 pm-9:59 am

1 stop8h 04m

$299

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Sat 6/6

5:16 pm-9:07 pm

1 stop6h 51m

Phoenix Sky Harbor Intl

Wed 6/10

11:55 pm-9:10 am

1 stop6h 15m

$299

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Sat 2/28

7:05 am-5:44 pm

1 stop12h 39m

Phoenix Sky Harbor Intl

Wed 3/4

8:20 am-5:27 pm

1 stop7h 07m

$322

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Sat 3/7

5:15 pm-11:11 pm

1 stop7h 56m

Phoenix Sky Harbor Intl

Sat 3/14

11:40 pm-6:50 am

Nonstop4h 10m

$326

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Sun 5/3

9:00 am-3:51 pm

1 stop9h 51m

Phoenix Sky Harbor Intl

Tue 5/5

11:20 am-5:41 pm

1 stop27h 21m

$338

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Tue 3/3

7:05 am-7:32 pm

2 stops14h 27m

Phoenix Sky Harbor Intl

Fri 3/6

6:00 am-5:20 pm

1 stop9h 20m

$341

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Wed 4/8

6:22 pm-11:27 pm

1 stop8h 05m

Phoenix Sky Harbor Intl

Sat 4/11

7:00 am-5:22 pm

1 stop7h 22m

$350

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Tue 3/3

6:20 pm-11:40 am

1 stop19h 20m

Phoenix Sky Harbor Intl

Thu 3/5

8:20 am-5:27 pm

1 stop7h 07m

$354

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Tue 3/3

3:58 pm-9:21 pm

1 stop7h 23m

Phoenix Sky Harbor Intl

Wed 3/4

8:38 am-2:58 pm

Nonstop4h 20m

$359

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Mon 6/1

7:35 am-12:09 pm

1 stop7h 34m

Phoenix Sky Harbor Intl

Sat 6/6

11:46 pm-9:10 am

1 stop6h 24m

$365

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/5

Showing 1-10 of 23 results
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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

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

Use this chart to determine the optimal time to book a round-trip flight from Dulles Intl to Phoenix. Price data was last updated on January 30, 2026.

The best time to book flights from Washington, D.C. Dulles Intl Airport to Phoenix is 88 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 month to book a flight from Washington, D.C. Dulles Intl Airport to Phoenix?

Currently, February is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Phoenix (average of $186). Flying from Washington, D.C. Dulles Intl Airport to Phoenix in April is currently the most expensive (average of $287). 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 February 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 22% on the flight price compared to flying in the evening, which is usually more expensive.

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 February 8, 2026.
Read reviews from past customers who have flown Southwest, Delta, and United 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
8.0
Very good
4,282 reviews

Comfort

8.0

Overall

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Southwest
8.0
Very good
4,282 reviews
Southwest
8.0
Very good
4,282 reviews

Comfort

8.0

Overall

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Delta
7.9
Good
8,173 reviews
Southwest
8.0
Very good
4,282 reviews

Comfort

8.0

Overall

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
United Airlines
7.4
Good
9,257 reviews
Southwest
8.0
Very good
4,282 reviews

Comfort

8.0

Overall

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
American Airlines
7.2
Good
11,254 reviews
Southwest
8.0
Very good
4,282 reviews

Comfort

8.0

Overall

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Frontier
5.7
Fair
3,051 reviews
Southwest
8.0
Very good
4,282 reviews

Comfort

8.0

Overall

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

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?

    Delta, Alaska Airlines, and United Airlines can get you from Washington, D.C. Dulles Intl Airport to Phoenix in just under 7h 56m. Your travel time can differ by up to 4h 43m. 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 ($158), Delta ($176), and Southwest ($252) offers the cheapest pricing from Washington, D.C. Dulles Intl Airport to Phoenix. Frontier is currently priced 61% 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 $89. Users have also found prices from $103 and $135 on Southwest and United Airlines, 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 (91%), 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 $1,028, our data shows the cheapest flight currently is $163. When looking at the most popular route, (Washington, D.C. Dulles Intl - Phoenix Sky Harbor Intl), you can expect to pay $229 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, February is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Phoenix (average of $186). Flying from Washington, D.C. Dulles Intl Airport to Phoenix in April is currently the most expensive (average of $287). 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 5 airlines flying from Dulles Intl to Phoenix

Discover the top 5 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 February 8, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$163Average$261FlexibilityNo cancel feeOn-time62%
DeltaCheapest$176Average$332FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$256Average$401FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$272Average$432FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$366Average$498FlexibilityNo cancel feeOn-time71%

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