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$125+ 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 5/6. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — PHX
Apr 22 — Apr 291
Wed 4/22
Wed 4/29
1 adult, Economy
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Find cheap flights from Dulles Intl to Phoenix with Cheapflights

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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 62 days in advance, depart on a Saturday 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 March 23, 2026.

This CheapOair deal was found by Cheapflights users on 3/18. 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 4/227:10 am
IAD
-
PHX
2 stops14h 16m
Alaska Airlines
Sat 4/255:00 am
PHX
-
IAD
1 stop10h 20m
Alaska Airlines
Deal found 3/18$321
This Alaska Airlines deal was found by Cheapflights users on 3/18. 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.
Tue 5/127:10 am
IAD
-
PHX
2 stops14h 16m
Alaska Airlines
Tue 5/197:59 pm
PHX
-
IAD
1 stop18h 43m
Alaska Airlines
Deal found 3/18$323
This CheapOair deal was found by Cheapflights users on 3/21. 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.
Sun 5/108:00 am
IAD
-
PHX
1 stop28h 17m
Multiple Airlines
Wed 5/1311:30 pm
PHX
-
IAD
1 stop7h 42m
Multiple Airlines
Deal found 3/21$324
This Kiwi.com deal was found by Cheapflights users on 3/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/128:00 am
IAD
-
PHX
1 stop17h 41m
Multiple Airlines
Thu 4/169:00 am
PHX
-
IAD
2 stops12h 36m
Multiple Airlines
Deal found 3/20$325
This Frontier deal was found by Cheapflights users on 3/21. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/1012:36 pm
IAD
-
PHX
1 stop8h 59m
Frontier
Thu 5/1411:30 pm
PHX
-
IAD
1 stop7h 42m
Frontier
Deal found 3/21$326
This Kiwi.com deal was found by Cheapflights users on 3/18. 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 4/249:21 am
IAD
-
PHX
1 stop9h 04m
Frontier
Sat 4/2512:38 pm
PHX
-
IAD
1 stop8h 58m
Frontier
Deal found 3/18$327
This Kiwi.com deal was found by Cheapflights users on 3/22. 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 4/111:36 pm
IAD
-
PHX
2 stops20h 59m
Frontier
Wed 4/1512:58 pm
PHX
-
IAD
1 stop8h 38m
Frontier
Deal found 3/22$328
This Kiwi.com deal was found by Cheapflights users on 3/21. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/128:00 am
IAD
-
PHX
1 stop17h 41m
Multiple Airlines
Fri 4/1710:29 pm
PHX
-
IAD
1 stop8h 25m
Multiple Airlines
Deal found 3/21$329
This Kiwi.com deal was found by Cheapflights users on 3/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/218:20 am
IAD
-
PHX
2 stops12h 37m
Frontier
Sat 4/2512:38 pm
PHX
-
IAD
1 stop8h 58m
Frontier
Deal found 3/20$330
This Alaska Airlines deal was found by Cheapflights users on 3/21. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/257:10 am
IAD
-
PHX
1 stop10h 50m
Alaska Airlines
Thu 4/304:00 pm
PHX
-
IAD
1 stop10h 50m
Alaska Airlines
Deal found 3/21$331
This Kiwi.com deal was found by Cheapflights users on 3/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/2011:37 am
IAD
-
PHX
1 stop7h 20m
Multiple Airlines
Fri 4/241:00 pm
PHX
-
IAD
2 stops15h 27m
Multiple Airlines
Deal found 3/20$332
This Kiwi.com deal was found by Cheapflights users on 3/22. 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 4/128:00 am
IAD
-
PHX
1 stop17h 41m
Multiple Airlines
Tue 4/146:50 am
PHX
-
IAD
2 stops14h 46m
Multiple Airlines
Deal found 3/22$333

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 March 23, 2026.

Round-trip from

$320
(Alaska Airlines)

One-way from

$125
(Kiwi.com)

Popular in

March

Cheapest in

August

Average price

$561
From Washington, D.C. Dulles Intl to Phoenix
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One-way flight from Washington, D.C. Dulles Intl to Phoenix
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Highest demand for flights based on searches. 12% potential increase in price ($59 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($13 potential savings vs. average RT price).
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Average for round-trip flights in March 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 March 23, 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

Tue 4/14

5:37 pm-7:49 pm

Nonstop5h 12m

Phoenix Sky Harbor Intl

Tue 4/21

1:23 pm-8:47 pm

Nonstop4h 24m

$367
Quickest round-trip

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Thu 4/30

4:30 pm-6:35 pm

Nonstop5h 05m

Phoenix Sky Harbor Intl

Tue 5/5

8:35 am-3:50 pm

Nonstop4h 15m

$367

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Tue 4/28

5:37 pm-7:49 pm

Nonstop5h 12m

Phoenix Sky Harbor Intl

Sat 5/2

12:30 pm-10:49 pm

1 stop7h 19m

$373

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Wed 4/22

5:30 pm-7:40 pm

Nonstop5h 10m

Phoenix Sky Harbor Intl

Tue 4/28

2:35 pm-11:40 pm

1 stop6h 05m

$377

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Sat 5/23

5:50 pm-7:46 pm

Nonstop4h 56m

Phoenix Sky Harbor Intl

Sat 5/30

11:50 pm-9:24 am

1 stop6h 34m

$377

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Sun 5/3

5:23 pm-7:39 pm

Nonstop5h 16m

Phoenix Sky Harbor Intl

Tue 5/5

9:50 am-7:00 pm

1 stop6h 10m

$377

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Fri 5/15

6:58 pm-11:29 pm

1 stop7h 31m

Phoenix Sky Harbor Intl

Sat 5/16

12:59 am-11:18 am

1 stop7h 19m

$407

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Thu 4/30

1:05 pm-3:15 pm

Nonstop5h 10m

Phoenix Sky Harbor Intl

Fri 5/8

11:47 pm-7:06 am

Nonstop4h 19m

$434

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Thu 4/30

9:00 am-11:10 am

Nonstop5h 10m

Phoenix Sky Harbor Intl

Sun 5/3

6:44 pm-5:28 am

1 stop7h 44m

$444

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Wed 4/15

6:20 am-11:30 am

2 stops8h 10m

Phoenix Sky Harbor Intl

Mon 4/20

10:55 am-12:20 am

2 stops10h 25m

$448

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/19

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

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 March 13, 2026.

The best time to book flights from Washington, D.C. Dulles Intl Airport to Phoenix is 62 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, August is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Phoenix (average of $189). Flying from Washington, D.C. Dulles Intl Airport to Phoenix in March is currently the most expensive (average of $294). 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 March 23, 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 21% on the flight price compared to flying in the evening, which is usually more expensive.

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 March 14, 2026.

Travelers seeking maximum savings on their Washington, D.C. Dulles Intl Airport to Phoenix flight should consider departing on Saturday 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.

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 March 23, 2026.

The most flights from IAD to PH1 are scheduled on a Friday (7 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (4 on average).

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 March 23, 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
8.0
Very good
4,324 reviews

Food

7.0

Comfort

8.0

Boarding

8.1

Overall

8.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
8.0
Very good
4,324 reviews
Southwest
8.0
Very good
4,324 reviews

Food

7.0

Comfort

8.0

Boarding

8.1

Overall

8.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Delta
7.9
Good
8,319 reviews
Southwest
8.0
Very good
4,324 reviews

Food

7.0

Comfort

8.0

Boarding

8.1

Overall

8.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
United Airlines
7.4
Good
9,462 reviews
Southwest
8.0
Very good
4,324 reviews

Food

7.0

Comfort

8.0

Boarding

8.1

Overall

8.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
American Airlines
7.1
Good
11,489 reviews
Southwest
8.0
Very good
4,324 reviews

Food

7.0

Comfort

8.0

Boarding

8.1

Overall

8.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Frontier
5.7
Fair
3,019 reviews
Southwest
8.0
Very good
4,324 reviews

Food

7.0

Comfort

8.0

Boarding

8.1

Overall

8.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

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 Southwest can get you from Washington, D.C. Dulles Intl Airport to Phoenix in just under 5h 05m. Your travel time will be generally consistent. There are 1950 mi between Washington, D.C. Dulles Intl Airport and Phoenix. All flights are typically nonstop.

  • 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 ($239), and Delta ($243) 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 $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 (87%), Southwest (83%) and Lufthansa (76%).

  • 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 $790, our data shows the cheapest flight currently is $132. When looking at the most popular route, (Washington, D.C. Dulles Intl - Phoenix Sky Harbor Intl), you can expect to pay $185 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 $189). Flying from Washington, D.C. Dulles Intl Airport to Phoenix in March is currently the most expensive (average of $294). 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 March 23, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$163Average$261FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$239Average$411FlexibilityNo cancel feeOn-time63%
DeltaCheapest$243Average$330FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$274Average$453FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$376Average$560FlexibilityNo cancel feeOn-time71%

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