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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 11/1. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — PHX
Aug 2 — Aug 91
Sat 8/2
Sat 8/9
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 64 days in advance, depart on a Tuesday or Wednesday and return on a Friday

Cheap 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 28, 2025.

Round-trip from

$238
(Frontier)

One-way from

$124
(Frontier)

Popular in

December

Cheapest in

August

Average price

$388
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. 4% potential increase in price ($19 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find 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 28, 2025.

This Frontier deal was found by Cheapflights users on 7/27. 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 7/297:30 amIAD - PHX
1 stop13h 57mFrontier
Sat 8/27:17 pmPHX - IAD
1 stop8h 17mFrontier
Deal found 7/27$238
This Mytrip deal was found by Cheapflights users on 7/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/156:10 amIAD - PHX
1 stop8h 21mMultiple Airlines
Sat 8/236:20 pmPHX - IAD
1 stop13h 47mMultiple Airlines
Deal found 7/27$277
This Southwest deal was found by Cheapflights users on 7/28. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/274:55 pmIAD - PHX
Nonstop4h 45mSouthwest
Wed 9/310:00 amPHX - IAD
Nonstop4h 15mSouthwest
Deal found 7/28$287
This flugladen.de deal was found by Cheapflights users on 7/25. 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 flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/255:52 pmIAD - PHX
1 stop7h 34mHawaiian Airlines
Tue 9/26:00 amPHX - IAD
1 stop7h 52mHawaiian Airlines
Deal found 7/25$291
This Sun Country Air deal was found by Cheapflights users on 7/27. 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 Sun Country Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/512:46 pmIAD - PHX
1 stop13h 01mSun Country Air
Thu 10/1611:59 pmPHX - IAD
1 stop9h 27mSun Country Air
Deal found 7/27$295
This Alaska Airlines deal was found by Cheapflights users on 7/27. 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.
Wed 10/85:42 pmIAD - PHX
1 stop7h 57mAlaska Airlines
Tue 10/1412:09 pmPHX - IAD
1 stop9h 14mAlaska Airlines
Deal found 7/27$306
This Delta deal was found by Cheapflights users on 7/28. 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 8/296:15 pmIAD - PHX
1 stop7h 26mDelta
Mon 9/111:59 pmPHX - IAD
1 stop8h 24mDelta
Deal found 7/28$307
This United Airlines deal was found by Cheapflights users on 7/27. 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.
Tue 10/215:25 pmIAD - PHX
Nonstop4h 50mUnited Airlines
Fri 10/241:41 pmPHX - IAD
Nonstop4h 21mUnited Airlines
Deal found 7/27$322

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 28, 2025.
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 10/11

7:00 am-2:50 pm

1 stop10h 50m

Phoenix Sky Harbor Intl

Sat 10/18

6:00 am-4:13 pm

1 stop7h 13m

$238

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Fri 8/15

6:10 am-11:31 am

1 stop8h 21m

Phoenix Sky Harbor Intl

Sat 8/23

6:20 pm-11:07 am

1 stop13h 47m

$277

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Wed 8/27

4:55 pm-6:40 pm

Nonstop4h 45m

Phoenix Sky Harbor Intl

Sun 8/31

2:10 pm-9:25 pm

Nonstop4h 15m

$287

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Mon 8/25

5:52 pm-10:26 pm

1 stop7h 34m

Phoenix Sky Harbor Intl

Tue 9/2

6:00 am-4:52 pm

1 stop7h 52m

$291

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Fri 1/16

5:45 pm-8:55 pm

Nonstop5h 10m

Phoenix Sky Harbor Intl

Mon 1/19

9:05 pm-7:35 am

1 stop8h 30m

$293

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Sun 10/5

12:46 pm-10:47 pm

1 stop13h 01m

Phoenix Sky Harbor Intl

Thu 10/16

11:59 pm-12:26 pm

1 stop9h 27m

$295

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Wed 10/8

5:42 pm-10:39 pm

1 stop7h 57m

Phoenix Sky Harbor Intl

Tue 10/14

12:09 pm-12:23 am

1 stop9h 14m

$306

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Fri 8/29

6:15 pm-10:41 pm

1 stop7h 26m

Phoenix Sky Harbor Intl

Tue 9/2

6:05 am-4:30 pm

1 stop7h 25m

$307

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Sat 11/1

12:54 pm-7:59 pm

1 stop10h 05m

$124

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Fri 11/14

11:56 am-11:45 pm

1 stop13h 49m

$130

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/27

Showing 1-10 of 18 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 July 25, 2025.

The best time to book flights from Washington, D.C. Dulles Intl Airport to Phoenix is 64 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, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Phoenix (average of $258). Flying from Washington, D.C. Dulles Intl Airport to Phoenix in March is currently the most expensive (average of $337). 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 28, 2025.

It’s typically best to fly out from Washington, D.C. Dulles Intl Airport to Phoenix at noon. Doing so could potentially save you 36% 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 December 16, 2024.

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. Sunday 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 July 28, 2025.

The most flights from IAD to PH1 are scheduled on a Monday (7 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (5 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 July 28, 2025.
Read reviews from past customers who have flown Alaska Airlines, Southwest, and Delta 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.
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Crew

8.5

Entertainment

7.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Crew

8.5

Entertainment

7.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Southwest
8.0
Very good
4,237 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Crew

8.5

Entertainment

7.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,971 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Crew

8.5

Entertainment

7.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Hawaiian Airlines
7.8
Good
2,604 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Crew

8.5

Entertainment

7.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
United Airlines
7.4
Good
8,893 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Crew

8.5

Entertainment

7.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

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.

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

    According to our current data, Frontier ($238), Southwest ($287), and Hawaiian Airlines ($291) offers the cheapest pricing from Washington, D.C. Dulles Intl Airport to Phoenix. Frontier is currently priced 41% 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 $124. Users have also found prices from $138 and $144 on Sun Country Air 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 Avianca (80%), United Airlines (76%) and Southwest (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 $618, our data shows the cheapest flight currently is $109. When looking at the most popular route, (Washington, D.C. Dulles Intl - Phoenix Sky Harbor Intl), you can expect to pay $245 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, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Phoenix (average of $258). Flying from Washington, D.C. Dulles Intl Airport to Phoenix in March is currently the most expensive (average of $337). 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 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$148Average$248FlexibilityNo cancel feeOn-time62%
Sun Country AirCheapest$241Average$310FlexibilityNo cancel feeOn-time83%
DeltaCheapest$256Average$362FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$269Average$380FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$270Average$414FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$366Average$452FlexibilityNo cancel feeOn-time71%

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