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Dulles Intl

$121+ 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 3/17. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — IAD
Mar 5 — Mar 121
Thu 3/5
Thu 3/12
1 adult, Economy
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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 February 3, 2026.

This Kiwi.com deal was found by Cheapflights users on 2/2. 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 3/3111:10 am
PHX
-
IAD
1 stop10h 21m
Frontier
Wed 4/86:00 am
IAD
-
PHX
2 stops20h 47m
Frontier
Deal found 2/2$244
This Travelocity deal was found by Cheapflights users on 2/3. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/158:00 am
PHX
-
IAD
1 stop13h 36m
Frontier
Sun 4/199:51 am
IAD
-
PHX
1 stop8h 35m
Frontier
Deal found 2/3$245
This Frontier deal was found by Cheapflights users on 2/1. 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 3/411:59 pm
PHX
-
IAD
1 stop7h 26m
Frontier
Wed 3/116:20 am
IAD
-
PHX
1 stop8h 50m
Frontier
Deal found 2/1$246
This Alaska Airlines deal was found by Cheapflights users on 2/3. 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 4/216:28 pm
PHX
-
IAD
1 stop20h 13m
Alaska Airlines
Tue 4/289:00 am
IAD
-
PHX
1 stop9h 51m
Alaska Airlines
Deal found 2/3$247
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 3/311:59 pm
PHX
-
IAD
1 stop31h 26m
Frontier
Sat 3/78:09 am
IAD
-
PHX
1 stop18h 35m
Frontier
Deal found 2/2$248
This CheapOair deal was found by Cheapflights users on 2/3. 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.
Fri 2/276:00 am
PHX
-
IAD
1 stop8h 24m
Frontier
Mon 3/98:09 am
IAD
-
PHX
1 stop18h 35m
Frontier
Deal found 2/3$250
This Mytrip deal was found by Cheapflights users on 2/3. 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.
Sun 3/15:20 am
PHX
-
IAD
1 stop10h 59m
Frontier
Sat 3/78:09 am
IAD
-
PHX
1 stop18h 35m
Frontier
Deal found 2/3$251
This Expedia deal was found by Cheapflights users on 2/2. 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.
Sat 2/2111:59 pm
PHX
-
IAD
1 stop30h 10m
Multiple Airlines
Tue 2/246:20 pm
IAD
-
PHX
1 stop19h 20m
Multiple Airlines
Deal found 2/2$253
This Kiwi.com deal was found by Cheapflights users on 2/1. 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 4/911:01 am
PHX
-
IAD
2 stops10h 35m
Frontier
Tue 4/146:20 am
IAD
-
PHX
1 stop14h 09m
Frontier
Deal found 2/1$254
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 2/195:05 am
PHX
-
IAD
1 stop10h 52m
Frontier
Mon 3/210:20 am
IAD
-
PHX
1 stop16h 35m
Frontier
Deal found 2/2$255
This Frontier deal was found by Cheapflights users on 2/1. 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.
Thu 2/125:05 am
PHX
-
IAD
1 stop10h 52m
Frontier
Mon 2/166:37 pm
IAD
-
PHX
1 stop8h 18m
Frontier
Deal found 2/1$256
This CheapOair deal was found by Cheapflights users on 2/2. 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.
Thu 2/195:05 am
PHX
-
IAD
1 stop10h 52m
Frontier
Sun 2/229:07 pm
IAD
-
PHX
1 stop22h 22m
Frontier
Deal found 2/2$257

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 February 3, 2026.

Round-trip from

$244
(Kiwi.com)

One-way from

$121
(Kiwi.com)

Popular in

February

Cheapest in

August

Average price

$503
From Phoenix to Washington, D.C. Dulles Intl
Search Deals
One-way flight from Phoenix to Washington, D.C. Dulles Intl
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($44 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
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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 February 3, 2026.
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

Tue 4/21

6:28 pm-5:41 pm

1 stop20h 13m

Washington, D.C. Dulles Intl

Tue 4/28

9:00 am-4:50 pm

1 stop10h 50m

$261

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Tue 4/21

11:55 pm-11:46 am

1 stop8h 51m

Washington, D.C. Dulles Intl

Sat 4/25

3:00 pm-7:11 pm

1 stop7h 11m

$291

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Tue 2/24

11:50 pm-9:13 am

1 stop7h 23m

Washington, D.C. Dulles Intl

Sat 2/28

12:35 pm-8:07 pm

1 stop9h 32m

$293

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Sat 3/28

10:30 pm-9:10 am

1 stop7h 40m

Washington, D.C. Dulles Intl

Tue 4/7

12:14 pm-6:18 pm

1 stop9h 04m

$293

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Wed 3/4

11:33 am-8:47 pm

1 stop7h 14m

Washington, D.C. Dulles Intl

Wed 3/11

8:35 am-10:58 am

Nonstop5h 23m

$295

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Wed 5/27

11:46 pm-9:16 am

1 stop6h 30m

Washington, D.C. Dulles Intl

Sat 5/30

5:16 pm-9:07 pm

1 stop6h 51m

$299

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Wed 2/18

11:50 pm-9:13 am

1 stop7h 23m

Washington, D.C. Dulles Intl

Sat 2/21

12:38 pm-7:47 pm

1 stop9h 09m

$312

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Wed 3/4

4:27 pm-5:27 pm

1 stop23h 00m

Washington, D.C. Dulles Intl

Sun 3/8

6:20 pm-10:40 am

1 stop19h 20m

$320

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Tue 2/24

8:20 am-5:27 pm

1 stop7h 07m

Washington, D.C. Dulles Intl

Sun 3/1

6:20 pm-7:32 pm

1 stop27h 12m

$320

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Sat 4/18

7:35 am-3:01 pm

Nonstop4h 26m

Washington, D.C. Dulles Intl

Sat 4/25

8:50 am-10:59 am

Nonstop5h 09m

$323

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/31

Showing 1-10 of 23 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 January 30, 2026.

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 $262). 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 February 3, 2026.

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 38% 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 January 31, 2026.

Travelers seeking maximum savings on their Phoenix to Washington, D.C. Dulles Intl Airport flight should consider departing on Wednesday evenings 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 February 3, 2026.

The most flights from PH1 to IAD 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 (3 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 127 minutes.

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

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

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

Tuesday 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 8% 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 February 3, 2026.
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.
Southwest
8.0
Very good
4,272 reviews

Food

7.0

Entertainment

7.5

Crew

8.6

Overall

8.0

Comfort

8.0

Boarding

8.1

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
Southwest
8.0
Very good
4,272 reviews
Southwest
8.0
Very good
4,272 reviews

Food

7.0

Entertainment

7.5

Crew

8.6

Overall

8.0

Comfort

8.0

Boarding

8.1

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
Delta
7.9
Good
8,139 reviews
Southwest
8.0
Very good
4,272 reviews

Food

7.0

Entertainment

7.5

Crew

8.6

Overall

8.0

Comfort

8.0

Boarding

8.1

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
United Airlines
7.4
Good
9,236 reviews
Southwest
8.0
Very good
4,272 reviews

Food

7.0

Entertainment

7.5

Crew

8.6

Overall

8.0

Comfort

8.0

Boarding

8.1

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
Frontier
5.7
Fair
3,051 reviews
Southwest
8.0
Very good
4,272 reviews

Food

7.0

Entertainment

7.5

Crew

8.6

Overall

8.0

Comfort

8.0

Boarding

8.1

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?

    Alaska Airlines, Delta, and United Airlines can get you from Phoenix to Washington, D.C. Dulles Intl Airport in just under 7h 14m. Your travel time can differ by up to 12h 59m. The distance between Phoenix and Washington, D.C. Dulles Intl Airport is about 1950 mi. This flight may include one or multiple stops.

  • 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 $217 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 $78 on Frontier. Other airlines that offer cheap prices include United Airlines from $122 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 Brussels Airlines (98%), Austrian Airlines (98%) and United Airlines (98%).

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

    On average you can expect to pay $805 for a flight from Phoenix to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is $125 while the most popular route, (Phoenix Sky Harbor Intl - Washington, D.C. Dulles Intl) is currently priced at $219.

  • 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 $262). 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
Silver Spring
Herndon
Fredericksburg
Hanover
Linthicum Heights
Rockville
Laurel
Towson
Upper Marlboro
Manassas
Largo
Bowie
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 February 3, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$135Average$260FlexibilityNo cancel feeOn-time62%
DeltaCheapest$187Average$318FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$217Average$399FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$254Average$404FlexibilityNo cancel feeOn-time69%

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