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$129+ 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 5/16. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — PHX
Jun 6 — Jun 131
Sat 6/6
Sat 6/13
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 62 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 May 7, 2026.

This Kiwi.com deal was found by Cheapflights users on 5/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/34:37 pm
IAD
-
PHX
1 stop9h 27m
Frontier
Sat 7/256:24 am
PHX
-
IAD
1 stop9h 21m
Frontier
Deal found 5/6$280
This Kiwi.com deal was found by Cheapflights users on 5/4. 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.
Sun 5/3111:07 am
IAD
-
PHX
2 stops29h 02m
Frontier
Fri 6/510:27 pm
PHX
-
IAD
1 stop6h 45m
Frontier
Deal found 5/4$281
This Super.com deal was found by Cheapflights users on 5/4. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/1811:12 am
IAD
-
PHX
1 stop12h 21m
Frontier
Thu 5/217:40 am
PHX
-
IAD
1 stop21h 32m
Frontier
Deal found 5/4$282
This Kiwi.com deal was found by Cheapflights users on 5/5. 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.
Wed 6/311:07 am
IAD
-
PHX
2 stops15h 17m
Frontier
Fri 6/1210:32 pm
PHX
-
IAD
1 stop6h 53m
Frontier
Deal found 5/5$283
This Kiwi.com deal was found by Cheapflights users on 5/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/291:31 pm
IAD
-
PHX
2 stops21h 13m
Frontier
Sat 5/3011:30 pm
PHX
-
IAD
1 stop7h 42m
Frontier
Deal found 5/6$284
This Frontier deal was found by Cheapflights users on 5/4. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/165:26 pm
IAD
-
PHX
1 stop8h 00m
Frontier
Fri 5/2211:30 pm
PHX
-
IAD
1 stop13h 51m
Frontier
Deal found 5/4$285
This Super.com deal was found by Cheapflights users on 5/4. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/145:26 pm
IAD
-
PHX
1 stop8h 00m
Frontier
Wed 5/207:40 am
PHX
-
IAD
1 stop21h 32m
Frontier
Deal found 5/4$287
This Frontier deal was found by Cheapflights users on 5/5. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/13:38 pm
IAD
-
PHX
1 stop10h 26m
Frontier
Sat 7/1111:23 pm
PHX
-
IAD
1 stop7h 50m
Frontier
Deal found 5/5$288
This Kiwi.com deal was found by Cheapflights users on 5/4. 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.
Tue 6/24:01 pm
IAD
-
PHX
2 stops21h 04m
Frontier
Sat 6/610:27 pm
PHX
-
IAD
1 stop6h 45m
Frontier
Deal found 5/4$289
This Expedia deal was found by Cheapflights users on 5/6. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2112:56 pm
IAD
-
PHX
1 stop12h 30m
Frontier
Tue 5/2611:30 pm
PHX
-
IAD
1 stop7h 42m
Frontier
Deal found 5/6$290
This Kiwi.com deal was found by Cheapflights users on 5/4. 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.
Tue 5/2611:07 am
IAD
-
PHX
1 stop14h 19m
Frontier
Fri 5/2912:20 am
PHX
-
IAD
2 stops13h 01m
Frontier
Deal found 5/4$291

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 May 7, 2026.

Round-trip from

$280
(Kiwi.com)

One-way from

$129
(Super.com)

Popular in

March

Cheapest in

August

Average price

$440
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. 14% potential increase in price ($74 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in May 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 May 7, 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 6/1

4:30 pm-6:35 pm

Nonstop5h 05m

Phoenix Sky Harbor Intl

Tue 6/2

7:15 am-4:50 pm

1 stop6h 35m

$361

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Thu 6/4

5:50 pm-7:46 pm

Nonstop4h 56m

Phoenix Sky Harbor Intl

Mon 6/8

6:59 pm-5:27 am

1 stop7h 28m

$363

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Mon 6/1

1:15 pm-5:53 pm

1 stop7h 38m

Phoenix Sky Harbor Intl

Thu 6/4

11:50 pm-9:24 am

1 stop6h 34m

$373

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Tue 6/2

6:00 am-2:54 pm

1 stop11h 54m

Phoenix Sky Harbor Intl

Wed 6/3

7:20 am-11:59 pm

2 stops13h 39m

$387

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Tue 6/2

5:50 pm-7:46 pm

Nonstop4h 56m

Phoenix Sky Harbor Intl

Fri 6/5

12:20 pm-10:43 pm

1 stop7h 23m

$414

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Fri 6/19

7:49 pm-12:23 pm

1 stop19h 34m

Phoenix Sky Harbor Intl

Fri 7/3

6:53 pm-6:39 am

1 stop8h 46m

$419

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Sat 5/30

5:50 pm-7:46 pm

Nonstop4h 56m

Phoenix Sky Harbor Intl

Thu 6/4

11:50 pm-9:24 am

1 stop6h 34m

$463
Quickest round-trip

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Mon 8/3

5:50 pm-7:46 pm

Nonstop4h 56m

Phoenix Sky Harbor Intl

Sat 8/8

8:50 am-4:17 pm

Nonstop4h 27m

$477

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

Wed 6/10

12:20 pm-10:43 pm

1 stop7h 23m

$485

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Tue 6/23

8:29 am-1:39 pm

1 stop8h 10m

Phoenix Sky Harbor Intl

Mon 6/29

8:50 am-4:17 pm

Nonstop4h 27m

$488

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/6

Showing 1-10 of 22 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

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 61 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, October is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Phoenix (average of $144). 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 May 7, 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.

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 May 2, 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.

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 May 7, 2026.

The most flights from IAD to PH1 are scheduled on a Monday (8 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (6 on average).

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

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 May 7, 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
4,301 reviews

Crew

8.6

Food

7.0

Comfort

8.0

Overall

7.9

Boarding

8.1

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
7.9
Good
4,301 reviews
Southwest
7.9
Good
4,301 reviews

Crew

8.6

Food

7.0

Comfort

8.0

Overall

7.9

Boarding

8.1

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
8,459 reviews
Southwest
7.9
Good
4,301 reviews

Crew

8.6

Food

7.0

Comfort

8.0

Overall

7.9

Boarding

8.1

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
9,690 reviews
Southwest
7.9
Good
4,301 reviews

Crew

8.6

Food

7.0

Comfort

8.0

Overall

7.9

Boarding

8.1

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
11,669 reviews
Southwest
7.9
Good
4,301 reviews

Crew

8.6

Food

7.0

Comfort

8.0

Overall

7.9

Boarding

8.1

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
5.6
Fair
2,964 reviews
Southwest
7.9
Good
4,301 reviews

Crew

8.6

Food

7.0

Comfort

8.0

Overall

7.9

Boarding

8.1

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?

    Southwest, United Airlines, and Alaska Airlines 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 6h 58m. 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 ($237), 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 $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 Lufthansa (92%), United Airlines (86%) and Austrian Airlines (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 $409, 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 $195 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, October is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Phoenix (average of $144). 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 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 May 7, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$163Average$264FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$237Average$432FlexibilityNo cancel feeOn-time63%
DeltaCheapest$243Average$332FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$274Average$468FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$376Average$580FlexibilityNo cancel feeOn-time71%

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