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Dulles Intl

$142+ 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 9/1. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — IAD
Jul 18 — Jul 251
Sat 7/18
Sat 7/25
1 adult, Economy
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Cheapflights Tip: The best prices from Phoenix to Washington, D.C. Dulles Intl are usually found in January or September, booked 70 days in advance, depart on a Friday or Tuesday and return on a Saturday

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 June 18, 2026.

This Frontier deal was found by Cheapflights users on 6/17. 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 8/256:24 am
PHX
-
IAD
1 stop9h 18m
Frontier
Wed 8/2611:12 am
IAD
-
PHX
1 stop14h 08m
Frontier
Deal found 6/17$290
This Kiwi.com deal was found by Cheapflights users on 6/17. 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 8/149:58 pm
PHX
-
IAD
1 stop7h 22m
Frontier
Thu 8/208:59 am
IAD
-
PHX
1 stop30h 49m
Frontier
Deal found 6/17$294
This Kiwi.com deal was found by Cheapflights users on 6/17. 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 7/176:24 am
PHX
-
IAD
2 stops13h 31m
Frontier
Tue 7/219:50 am
IAD
-
PHX
1 stop16h 15m
Frontier
Deal found 6/17$296
This Priceline deal was found by Cheapflights users on 6/17. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/37:00 am
PHX
-
IAD
1 stop8h 14m
Multiple Airlines
Tue 9/88:59 am
IAD
-
PHX
1 stop7h 00m
Multiple Airlines
Deal found 6/17$300
This Kiwi.com deal was found by Cheapflights users on 6/14. 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 8/1411:23 pm
PHX
-
IAD
1 stop14h 11m
Frontier
Sun 8/169:50 am
IAD
-
PHX
1 stop16h 15m
Frontier
Deal found 6/14$303
This Booking.com deal was found by Cheapflights users on 6/15. 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.
Thu 7/169:58 pm
PHX
-
IAD
1 stop7h 22m
Frontier
Thu 7/239:50 am
IAD
-
PHX
1 stop16h 15m
Frontier
Deal found 6/15$304
This Kiwi.com deal was found by Cheapflights users on 6/13. 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 7/311:40 pm
PHX
-
IAD
1 stop7h 19m
Frontier
Wed 7/229:50 am
IAD
-
PHX
1 stop16h 15m
Frontier
Deal found 6/13$305
This Kiwi.com deal was found by Cheapflights users on 6/17. 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 8/209:03 am
PHX
-
IAD
1 stop20h 01m
Frontier
Sat 8/297:27 pm
IAD
-
PHX
2 stops39h 13m
Frontier
Deal found 6/17$307
This Kiwi.com deal was found by Cheapflights users on 6/17. 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 8/209:03 am
PHX
-
IAD
1 stop20h 01m
Multiple Airlines
Mon 8/247:35 pm
IAD
-
PHX
1 stop18h 56m
Multiple Airlines
Deal found 6/17$308
This Alaska Airlines deal was found by Cheapflights users on 6/16. 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.
Thu 9/107:08 am
PHX
-
IAD
1 stop8h 06m
Alaska Airlines
Sun 9/137:47 pm
IAD
-
PHX
1 stop18h 44m
Alaska Airlines
Deal found 6/16$309
This CheapOair deal was found by Cheapflights users on 6/17. 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.
Wed 7/299:58 pm
PHX
-
IAD
1 stop7h 22m
Frontier
Wed 8/511:11 am
IAD
-
PHX
1 stop26h 19m
Frontier
Deal found 6/17$310

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 June 18, 2026.

Round-trip from

$303
(Kiwi.com)

One-way from

$142
(Kiwi.com)

Popular in

February

Cheapest in

January

Average price

$531
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. 9% potential increase in price ($47 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($25 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 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 June 18, 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

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Tue 8/4

6:53 pm-6:45 pm

1 stop20h 52m

Washington, D.C. Dulles Intl

Wed 8/12

7:53 pm-12:23 pm

1 stop19h 30m

$309

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Thu 8/20

6:55 pm-5:25 am

1 stop7h 30m

Washington, D.C. Dulles Intl

Mon 8/24

6:00 pm-7:54 pm

Nonstop4h 54m

$339

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Fri 9/25

8:45 am-4:13 pm

Nonstop4h 28m

Washington, D.C. Dulles Intl

Mon 9/28

5:27 pm-9:59 pm

1 stop7h 32m

$339

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Wed 7/29

1:51 pm-11:20 pm

1 stop6h 29m

Washington, D.C. Dulles Intl

Mon 8/3

5:47 pm-10:41 pm

1 stop7h 54m

$349

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Fri 8/21

10:35 pm-11:49 am

1 stop10h 14m

Washington, D.C. Dulles Intl

Wed 9/9

12:26 pm-5:40 pm

1 stop8h 14m

$349

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Thu 7/16

11:50 pm-9:26 am

1 stop6h 36m

Washington, D.C. Dulles Intl

Mon 7/20

3:02 pm-6:53 pm

1 stop6h 51m

$349

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Thu 11/26

7:00 am-4:17 pm

1 stop7h 17m

Washington, D.C. Dulles Intl

Tue 12/1

4:00 pm-12:06 am

1 stop10h 06m

$359

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Mon 6/29

10:35 pm-11:48 am

1 stop10h 13m

Washington, D.C. Dulles Intl

Fri 7/17

5:46 pm-9:34 pm

1 stop6h 48m

$384
Quickest round-trip

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Mon 9/28

2:05 pm-9:27 pm

Nonstop4h 22m

Washington, D.C. Dulles Intl

Wed 9/30

8:51 am-10:42 am

Nonstop4h 51m

$387

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Tue 9/8

2:26 pm-12:44 am

1 stop7h 18m

Washington, D.C. Dulles Intl

Thu 9/10

6:00 pm-7:54 pm

Nonstop4h 54m

$396

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/17

Showing 1-10 of 21 resultsSorted by cheapest first
1
2
3

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

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

Currently, September is the cheapest month in which you can book a flight from Phoenix to Washington, D.C. Dulles Intl Airport (average of $112). Flying from Phoenix to Washington, D.C. Dulles Intl Airport in March is currently the most expensive (average of $257). 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 June 18, 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 26% on the flight price compared to flying in the morning, which is usually more expensive.

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 June 18, 2026.

The most flights from PH1 to IAD are scheduled on a Wednesday (8 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (4 on average).

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

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

About 11% of weekly flights between Phoenix and Washington, D.C. have experienced delays in the past year, with the average delay time being 131 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?

Saturday 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.

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

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 69 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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 June 13, 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.

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 June 18, 2026.
Read reviews from past customers who have flown Southwest,Delta, andUnited 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
7.9
Good
4,237 reviews

Overall

7.9

Comfort

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

La Tracimeldamarcos,Jun 2026

LAX - SLC

The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.
Southwest
7.9
Good
4,237 reviews
Southwest
7.9
Good
4,237 reviews

Overall

7.9

Comfort

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

La Tracimeldamarcos,Jun 2026

LAX - SLC

The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.
Delta
7.8
Good
8,410 reviews
Southwest
7.9
Good
4,237 reviews

Overall

7.9

Comfort

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

La Tracimeldamarcos,Jun 2026

LAX - SLC

The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.
United Airlines
7.4
Good
9,859 reviews
Southwest
7.9
Good
4,237 reviews

Overall

7.9

Comfort

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

La Tracimeldamarcos,Jun 2026

LAX - SLC

The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.
American Airlines
7.1
Good
11,686 reviews
Southwest
7.9
Good
4,237 reviews

Overall

7.9

Comfort

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

La Tracimeldamarcos,Jun 2026

LAX - SLC

The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.
Frontier
5.6
Fair
2,880 reviews
Southwest
7.9
Good
4,237 reviews

Overall

7.9

Comfort

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

La Tracimeldamarcos,Jun 2026

LAX - SLC

The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.

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, United Airlines, and Delta can get you from Phoenix to Washington, D.C. Dulles Intl Airport in just under 6h 29m. Your travel time can differ by up to 14h 23m. 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 $150 on this airline. Additional options worth looking into are Delta and Southwest, starting at $187 and $268 round-trip. Frontier is 67% 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 $90 on Frontier. Other airlines that offer cheap prices include Delta from $128 and Southwest from $148 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 United Airlines (91%), Austrian Airlines (90%) and Brussels Airlines (90%).

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

    On average you can expect to pay $822 for a flight from Phoenix to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is $194 while the most popular route, (Phoenix Sky Harbor Intl - Washington, D.C. Dulles Intl) is currently priced at $221.

  • 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, September is the cheapest month in which you can book a flight from Phoenix to Washington, D.C. Dulles Intl Airport (average of $112). Flying from Phoenix to Washington, D.C. Dulles Intl Airport in March is currently the most expensive (average of $257). 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
Arlington
Tysons
Owings Mills
Springfield
Lanham
Reston
Herndon
Rockville
Hyattsville
Manassas
Fredericksburg
Laurel
Hanover
Chantilly
Falls Church
Waldorf
Silver Spring
Largo
Clinton

Browse thousands of different options on Cheapflights for your next trip

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Top 5 airlines flying from Phoenix to Dulles Intl

Discover the top 5 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 June 18, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$150Average$270FlexibilityNo cancel feeOn-time62%
DeltaCheapest$187Average$467FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$268Average$530FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$268Average$504FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$295Average$578FlexibilityNo cancel feeOn-time71%

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