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$136+ 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 4/1. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — PHX
Mar 31 — Apr 71
Mon 3/31
Mon 4/7
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 January, booked 71 days in advance, depart on a Wednesday or Tuesday 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 March 26, 2025.

Round-trip from

$278
(Frontier)

One-way from

$136
(Flightnetwork)

Popular in

December

Cheapest in

August

Average price

$453
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. 3% potential increase in price ($13 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in March 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 March 26, 2025.

This Frontier deal was found by Cheapflights users on 3/25. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/410:50 amIAD - PHX
1 stop14h 29mFrontier
Fri 4/1111:19 pmPHX - IAD
1 stop9h 39mFrontier
Deal found 3/25$278
This United Airlines deal was found by Cheapflights users on 3/25. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/25:50 pmIAD - PHX
Nonstop5h 07mUnited Airlines
Sat 5/246:30 pmPHX - IAD
1 stop7h 45mUnited Airlines
Deal found 3/25$279
This Booking.com deal was found by Cheapflights users on 3/25. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/76:35 amIAD - PHX
1 stop13h 07mMultiple Airlines
Wed 4/911:59 pmPHX - IAD
1 stop7h 56mMultiple Airlines
Deal found 3/25$283
This Sun Country Air deal was found by Cheapflights users on 3/25. 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 Sun Country Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/207:30 amIAD - PHX
1 stop13h 02mSun Country Air
Thu 4/246:40 pmPHX - IAD
1 stop14h 43mSun Country Air
Deal found 3/25$285
This Alaska Airlines deal was found by Cheapflights users on 3/24. 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 4/157:00 amIAD - PHX
1 stop10h 42mAlaska Airlines
Wed 4/236:16 pmPHX - IAD
1 stop10h 27mAlaska Airlines
Deal found 3/24$296
This Delta deal was found by Cheapflights users on 3/25. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/155:23 pmIAD - PHX
1 stop7h 17mDelta
Thu 4/176:00 amPHX - IAD
1 stop7h 37mDelta
Deal found 3/25$297
This Southwest deal was found by Cheapflights users on 3/25. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/77:50 amIAD - PHX
2 stops10h 25mSouthwest
Wed 5/147:15 amPHX - IAD
1 stop7h 40mSouthwest
Deal found 3/25$302
This American Airlines deal was found by Cheapflights users on 3/24. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/711:18 amIAD - PHX
2 stops8h 45mAmerican Airlines
Sun 6/86:00 amPHX - IAD
1 stop8h 35mAmerican Airlines
Deal found 3/24$382

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 26, 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

Fri 4/4

10:50 am-10:19 pm

1 stop14h 29m

Phoenix Sky Harbor Intl

Fri 4/11

11:19 pm-11:58 am

1 stop9h 39m

$278

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Fri 5/2

5:50 pm-7:57 pm

Nonstop5h 07m

Phoenix Sky Harbor Intl

Sat 5/24

6:30 pm-5:15 am

1 stop7h 45m

$279

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Mon 4/7

6:35 am-4:42 pm

1 stop13h 07m

Phoenix Sky Harbor Intl

Wed 4/9

11:59 pm-10:55 am

1 stop7h 56m

$283

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Sun 4/20

7:30 am-5:32 pm

1 stop13h 02m

Phoenix Sky Harbor Intl

Thu 4/24

6:40 pm-12:23 pm

1 stop14h 43m

$285

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Tue 4/15

7:00 am-2:42 pm

1 stop10h 42m

Phoenix Sky Harbor Intl

Wed 4/23

6:16 pm-7:43 am

1 stop10h 27m

$296

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Tue 4/15

5:23 pm-9:40 pm

1 stop7h 17m

Phoenix Sky Harbor Intl

Thu 4/17

6:00 am-4:37 pm

1 stop7h 37m

$297

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Tue 4/22

6:40 pm-10:30 pm

1 stop6h 50m

Phoenix Sky Harbor Intl

Sat 5/3

9:30 am-4:50 pm

Nonstop4h 20m

$298

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Sat 6/7

11:18 am-5:03 pm

2 stops8h 45m

Phoenix Sky Harbor Intl

Sat 6/14

7:00 am-5:35 pm

1 stop7h 35m

$382

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Tue 4/1

5:54 pm-11:04 pm

1 stop8h 10m

$136

Washington, D.C.Phoenix

IAD - PHX

IADPHX

Washington, D.C. Dulles Intl

Mon 4/21

11:37 am-5:05 pm

1 stop8h 28m

$140

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/24

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 March 21, 2025.

The best time to book flights from Washington, D.C. Dulles Intl Airport to Phoenix is 71 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 March 26, 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 34% 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.

Rainfall in Phoenix by month

Plan your trip to Phoenix by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Phoenix ranges from 0.0 - 1.1 inches per month. July is typically the wettest month, when rainfall can reach 1.1 in. June is typically the driest time to visit Phoenix when rainfall is around 0.0 in.

Temperature in Phoenix by month

Plan your trip to Phoenix by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Phoenix, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 95.0 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 55.4 F).

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 26, 2025.
To help decide which airline to fly from Washington, D.C. to Phoenix, see what other customers have to say about Southwest, Alaska Airlines and Delta. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,274 reviews

Overall

8.1

Boarding

8.2

Comfort

8.1

Entertainment

7.6

Food

7.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Southwest
8.1
Very good
4,274 reviews
Southwest
8.1
Very good
4,274 reviews

Overall

8.1

Boarding

8.2

Comfort

8.1

Entertainment

7.6

Food

7.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Alaska Airlines
8.0
Very good
9,789 reviews
Southwest
8.1
Very good
4,274 reviews

Overall

8.1

Boarding

8.2

Comfort

8.1

Entertainment

7.6

Food

7.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Delta
8.0
Very good
7,891 reviews
Southwest
8.1
Very good
4,274 reviews

Overall

8.1

Boarding

8.2

Comfort

8.1

Entertainment

7.6

Food

7.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Hawaiian Airlines
7.9
Good
2,330 reviews
Southwest
8.1
Very good
4,274 reviews

Overall

8.1

Boarding

8.2

Comfort

8.1

Entertainment

7.6

Food

7.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
United Airlines
7.4
Good
8,608 reviews
Southwest
8.1
Very good
4,274 reviews

Overall

8.1

Boarding

8.2

Comfort

8.1

Entertainment

7.6

Food

7.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

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 ($278), United Airlines ($279), and Sun Country Air ($285) offers the cheapest pricing from Washington, D.C. Dulles Intl Airport to Phoenix. Frontier is currently priced 33% 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 $136. Users have also found prices from $140 and $148 on Sun Country Air and Alaska 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 (89%), Avianca (87%) and Lufthansa (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 $793, our data shows the cheapest flight currently is $130. When looking at the most popular route, (Washington, D.C. Dulles Intl - Phoenix Sky Harbor Intl), you can expect to pay $239 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 March 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$132Average$225FlexibilityNo cancel feeOn-time62%
Sun Country AirCheapest$238Average$310FlexibilityNo cancel feeOn-time83%
DeltaCheapest$256Average$351FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$278Average$428FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$280Average$399FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$358Average$455FlexibilityNo cancel feeOn-time71%
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