Dulles Intl

$133+ Cheap flights from Phoenix to Dulles Intl (IAD)

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 1/9. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — IAD
Jan 11 — Jan 181
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Cheapflights Tip: The best prices from Phoenix to Washington, D.C. Dulles Intl are usually found in August or June, booked 70 days in advance, depart on a Friday or Thursday and return on a Wednesday

Cheap flight deals from Phoenix to Dulles Intl

Cheapest flights from Phoenix to Dulles Intl
Explore the most affordable flight options available from Phoenix to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 12, 2025.

This Kiwi.com deal was found by Cheapflights users on 12/9. 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 12/246:15 pmPHX - IAD
2 stops15h 23mFrontier
Sun 1/116:00 amIAD - PHX
1 stop11h 13mFrontier
Deal found 12/9$234
This United Airlines deal was found by Cheapflights users on 12/10. 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.
Wed 12/2411:35 pmPHX - IAD
Nonstop4h 15mUnited Airlines
Thu 1/15:40 pmIAD - PHX
Nonstop5h 12mUnited Airlines
Deal found 12/10$237
This Kiwi.com deal was found by Cheapflights users on 12/9. 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 12/246:15 pmPHX - IAD
2 stops15h 23mFrontier
Mon 1/126:00 amIAD - PHX
1 stop11h 13mFrontier
Deal found 12/9$245
This Delta deal was found by Cheapflights users on 12/10. 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.
Thu 12/252:00 pmPHX - IAD
1 stop6h 52mDelta
Wed 12/3112:32 pmIAD - PHX
1 stop8h 38mDelta
Deal found 12/10$257
This Delta deal was found by Cheapflights users on 12/11. 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.
Wed 12/242:33 pmPHX - IAD
1 stop6h 45mDelta
Thu 1/16:00 amIAD - PHX
1 stop7h 21mDelta
Deal found 12/11$260
This Kiwi.com deal was found by Cheapflights users on 12/11. 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 12/258:26 pmPHX - IAD
2 stops14h 48mFrontier
Sun 1/116:00 amIAD - PHX
1 stop11h 13mFrontier
Deal found 12/11$267
This Frontier deal was found by Cheapflights users on 12/11. 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.
Mon 12/156:00 amPHX - IAD
1 stop9h 25mFrontier
Sun 1/116:00 amIAD - PHX
1 stop11h 13mFrontier
Deal found 12/11$268
This CheapOair deal was found by Cheapflights users on 12/11. 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 12/2812:59 amPHX - IAD
1 stop18h 04mFrontier
Sun 1/116:00 amIAD - PHX
1 stop11h 13mFrontier
Deal found 12/11$269
This Kiwi.com deal was found by Cheapflights users on 12/11. 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 12/258:26 pmPHX - IAD
2 stops14h 48mFrontier
Mon 1/126:00 amIAD - PHX
1 stop11h 13mFrontier
Deal found 12/11$278
This Delta deal was found by Cheapflights users on 12/11. 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.
Thu 12/252:33 pmPHX - IAD
1 stop6h 45mDelta
Wed 1/146:15 pmIAD - PHX
1 stop7h 25mDelta
Deal found 12/11$281
This Southwest deal was found by Cheapflights users on 12/11. 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.
Thu 12/2511:00 amPHX - IAD
Nonstop4h 05mSouthwest
Wed 12/314:40 pmIAD - PHX
Nonstop5h 00mSouthwest
Deal found 12/11$283

Find flight deals from Phoenix to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Phoenix (PH1) to Dulles Intl (IAD). 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 December 12, 2025.

Round-trip from

$214
(Kiwi.com)

One-way from

$133
(Kiwi.com)

Popular in

January

Cheapest in

August

Average price

$464
From Phoenix to Washington, D.C. Dulles Intl
One-way flight from Phoenix to Washington, D.C. Dulles Intl
Highest demand for flights based on searches. 12% potential increase in price ($54 potential increase over avg. RT price).
Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
Average for round-trip flights in December 2025

Cheapflights Fare Finder

 
Customize your flight search to find flights from Phoenix to Dulles Intl 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 December 12, 2025.
Use the filters below to find and compare flights from Phoenix to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Phoenix

Fly to

Dulles Intl

Route

Depart

Return

Price

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Wed 12/24

12:15 pm-11:18 pm

1 stop9h 03m

Washington, D.C. Dulles Intl

Wed 12/31

12:32 pm-7:10 pm

1 stop8h 38m

$257

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Wed 1/21

12:05 pm-11:10 pm

1 stop9h 05m

Washington, D.C. Dulles Intl

Sun 1/25

7:30 am-3:45 pm

1 stop10h 15m

$285

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Wed 2/4

12:05 pm-11:10 pm

1 stop9h 05m

Washington, D.C. Dulles Intl

Sun 2/8

7:30 am-3:45 pm

1 stop10h 15m

$285

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Thu 12/25

12:15 pm-11:18 pm

1 stop9h 03m

Washington, D.C. Dulles Intl

Sun 1/11

7:30 am-3:45 pm

1 stop10h 15m

$290

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Wed 12/24

11:35 pm-9:49 am

1 stop8h 14m

Washington, D.C. Dulles Intl

Sat 1/10

7:30 am-3:45 pm

1 stop10h 15m

$290

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Tue 3/3

12:58 pm-11:19 pm

1 stop8h 21m

Washington, D.C. Dulles Intl

Wed 3/4

12:45 pm-4:08 pm

Nonstop5h 23m

$295

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Tue 3/3

2:10 pm-9:55 pm

1 stop5h 45m

Washington, D.C. Dulles Intl

Wed 3/4

9:05 am-5:40 pm

2 stops10h 35m

$310

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Fri 12/26

6:00 am-6:16 pm

1 stop10h 16m

Washington, D.C. Dulles Intl

Tue 12/30

9:58 pm-11:49 pm

1 stop27h 51m

$312

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Tue 1/6

12:05 pm-11:10 pm

1 stop9h 05m

Washington, D.C. Dulles Intl

Thu 1/8

7:30 am-3:45 pm

1 stop10h 15m

$325

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Tue 1/27

3:45 pm-5:04 pm

1 stop23h 19m

$138

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/11

Showing 1-10 of 21 results
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Best time to book a flight from Phoenix to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Phoenix 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 Phoenix to Washington, D.C. Dulles Intl Airport

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

Use this chart to determine the optimal time to book a round-trip flight from Phoenix to Dulles Intl. Price data was last updated on December 5, 2025.

The price you pay for your flight from Phoenix to Washington, D.C. Dulles Intl Airport may vary depending on when you book. For the best chance of a lower fare, look to book 70 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Phoenix to Washington, D.C. Dulles Intl Airport?

Currently, January is the cheapest month in which you can book a flight from Phoenix to Washington, D.C. Dulles Intl Airport (average of $150). Flying from Phoenix to Washington, D.C. Dulles Intl Airport in February is currently the most expensive (average of $249). 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 PHX to IAD?

Find hourly flight availability from Phoenix to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 12, 2025.

It’s typically best to fly out from Phoenix to Washington, D.C. Dulles Intl Airport in the evening. Doing so could potentially save you 49% on the flight price compared to flying at noon, which is usually more expensive.

What is the cheapest day to fly from Phoenix to Washington, D.C. Dulles Intl Airport?

Use this chart to determine the cheapest time to fly round-trip from Phoenix to Dulles Intl. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Phoenix to Washington, D.C. Dulles Intl Airport flight should consider departing on Friday mornings when fares are most often at their lowest. Saturday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Phoenix to Washington, D.C. Dulles Intl Airport

Explore weekly flight availability from Phoenix to Dulles Intl. 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 December 12, 2025.

The most flights from PH1 to IAD are scheduled on a Monday (8 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (1 on average).

How often are flights from Phoenix to Washington, D.C. delayed?

About 10% of weekly flights between Phoenix and Washington, D.C. have experienced delays in the past year, with the average delay time being 130 minutes.

What is the most punctual flight time for Phoenix to Washington, D.C. flights?

Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Monday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on Phoenix to Washington, D.C. flights?

Over the last year, United Airlines have had the lowest number of delays on this route, with just 9% of flights being delayed.

Reviews of airlines servicing Dulles Intl

Get insights into the airlines that provide service to Dulles Intl. 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 Dulles Intl. Reviews last updated December 12, 2025.
Read reviews from past customers who have flown Southwest, Delta, and United Airlines from Phoenix to Washington, D.C. Dulles Intl Airport. 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.

Entertainment

7.5

Food

7.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Overall

7.9

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

Entertainment

7.5

Food

7.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Overall

7.9

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

Entertainment

7.5

Food

7.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Overall

7.9

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

Entertainment

7.5

Food

7.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Overall

7.9

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

Entertainment

7.5

Food

7.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Overall

7.9

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 Phoenix to Dulles Intl. 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 Phoenix to Washington, D.C. Dulles Intl Airport?

    Delta can get you from Phoenix to Washington, D.C. Dulles Intl Airport in just under 9h 03m. Your travel time can differ by up to . The distance between Phoenix and Washington, D.C. Dulles Intl Airport is about 1950 mi.

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

    Our cheapest airline available from Phoenix to Washington, D.C. Dulles Intl Airport is Frontier. Our recent data shows that you can find tickets from as low as $135 on this airline. Additional options worth looking into are Delta and Southwest, starting at $187 and $236 round-trip. Frontier is 65% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Phoenix to Washington, D.C. Dulles Intl Airport one-way?

    One-way options have recently been found by users for as low as $85 on Frontier. Other airlines that offer cheap prices include United Airlines from $130 and Alaska Airlines from $138 one-way.

  • What are the most reliable airlines from Phoenix to Washington, D.C. Dulles Intl Airport?

    The top 3 most reliable airlines when flying from Phoenix to Washington, D.C. Dulles Intl Airport are Avianca (95%), United Airlines (91%) and Lufthansa (90%).

  • What are the cheapest flights from Phoenix to Washington, D.C. Dulles Intl Airport?

    On average you can expect to pay $968 for a flight from Phoenix to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is $153 while the most popular route, (Phoenix Sky Harbor Intl - Washington, D.C. Dulles Intl) is currently priced at $180.

  • Can I find deals for flights from Phoenix to Dulles Intl that include hotel bookings?

    Yes. In addition to deals on Phoenix to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Phoenix to Dulles Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Phoenix to Dulles Intl.

  • Can I find deals for business class flights from Phoenix to Dulles Intl?

    Yes. Cheapflights offers flight deals from Phoenix to Dulles Intl 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 Phoenix to Washington, D.C. Dulles Intl Airport?

    Currently, January is the cheapest month in which you can book a flight from Phoenix to Washington, D.C. Dulles Intl Airport (average of $150). Flying from Phoenix to Washington, D.C. Dulles Intl Airport in February is currently the most expensive (average of $249). 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

Traveling to a place near Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Alexandria
Woodbridge
Tysons
Arlington
Owings Mills
Springfield
Hanover
Silver Spring
Fredericksburg
Fairfax
Linthicum Heights
Manassas
Rockville
Laurel
Towson
National Harbor
Bowie
Largo
McLean
Clinton

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Top 4 airlines flying from Phoenix to Dulles Intl

Discover the top 4 airlines that operate flights from Phoenix to Dulles Intl. 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 December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$146Average$261FlexibilityNo cancel feeOn-time62%
DeltaCheapest$188Average$318FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$234Average$401FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$264Average$407FlexibilityNo cancel feeOn-time69%

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