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Dulles Intl

$170+ 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 9/11. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — IAD
Sep 12 — Sep 191
Sat 9/12
Sat 9/19
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 August, booked 56 days in advance, depart on a Friday or Thursday 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 August 13, 2026.

This Kiwi.com deal was found by Cheapflights users on 8/9. 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.
Tue 9/16:57 pm -
2 stops12h 10m
Thu 9/106:00 am -
1 stop9h 22m
Deal found 8/9$291
This Kiwi.com deal was found by Cheapflights users on 8/9. 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.
Mon 8/3112:19 pm -
1 stop7h 33m
Wed 9/96:35 am -
1 stop8h 24m
Deal found 8/9$293
This Kiwi.com deal was found by Cheapflights users on 8/8. 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 9/253:22 pm -
1 stop17h 11m
Mon 9/289:04 pm -
2 stops27h 46m
Deal found 8/8$294
This Kiwi.com deal was found by Cheapflights users on 8/8. 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 9/257:16 pm -
1 stop15h 53m
Mon 9/286:00 am -
1 stop19h 47m
Deal found 8/8$295
This Kiwi.com deal was found by Cheapflights users on 8/12. 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.
Sat 9/267:24 pm -
1 stop7h 56m
Tue 10/64:36 pm -
1 stop8h 14m
Deal found 8/12$296
This Kiwi.com deal was found by Cheapflights users on 8/8. 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 8/2710:30 pm -
1 stop30h 34m
Tue 9/18:59 am -
1 stop17h 25m
Deal found 8/8$297
This Kiwi.com deal was found by Cheapflights users on 8/9. 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.
Tue 9/110:09 pm -
1 stop6h 55m
Wed 9/96:35 am -
1 stop8h 24m
Deal found 8/9$299
This Kissandfly.com deal was found by Cheapflights users on 8/13. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/126:30 pm -
2 stops14h 03m
Sat 9/1911:15 am -
2 stops22h 58m
Deal found 8/13$300
This Kiwi.com deal was found by Cheapflights users on 8/11. 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.
Sat 9/267:24 pm -
1 stop7h 56m
Sat 10/106:00 am -
1 stop9h 23m
Deal found 8/11$301
This Kiwi.com deal was found by Cheapflights users on 8/11. 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.
Tue 10/135:55 pm -
1 stop9h 25m
Thu 10/229:16 pm -
2 stops29h 17m
Deal found 8/11$302
This Delta deal was found by Cheapflights users on 8/12. 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.
Sat 9/2611:51 am -
1 stop8h 32m
Mon 10/55:15 pm -
1 stop6h 58m
Deal found 8/12$303

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 August 13, 2026.

Round-trip from

$291
(Kiwi.com)

One-way from

$170
(United Airlines)

Popular in

February

Cheapest in

January

Average price

$429
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. 3% potential increase in price ($16 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($20 potential savings vs. average RT price).
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Average for round-trip flights in August 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 August 13, 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 Phoenix Sky Harbor Intl - IAD Washington, D.C. Dulles Intl

PHXIAD

Phoenix Sky Harbor Intl

Sat 9/26

11:51 am-11:23 pm

1 stop8h 32m

Washington, D.C. Dulles Intl

Tue 10/6

6:59 pm-11:26 pm

1 stop7h 27m

$303

PhoenixWashington, D.C.

PHX Phoenix Sky Harbor Intl - IAD Washington, D.C. Dulles Intl

PHXIAD

Phoenix Sky Harbor Intl

Sat 9/26

11:51 am-11:23 pm

1 stop8h 32m

Washington, D.C. Dulles Intl

Mon 10/5

5:15 pm-9:13 pm

1 stop6h 58m

$303

PhoenixWashington, D.C.

PHX Phoenix Sky Harbor Intl - IAD Washington, D.C. Dulles Intl

PHXIAD

Phoenix Sky Harbor Intl

Tue 10/20

6:05 am-5:33 pm

1 stop8h 28m

Washington, D.C. Dulles Intl

Tue 10/27

6:12 pm-10:21 pm

1 stop7h 09m

$303

PhoenixWashington, D.C.

PHX Phoenix Sky Harbor Intl - IAD Washington, D.C. Dulles Intl

PHXIAD

Phoenix Sky Harbor Intl

Tue 10/20

3:42 pm-5:50 pm

1 stop23h 08m

Washington, D.C. Dulles Intl

Tue 10/27

7:24 pm-9:26 am

1 stop17h 02m

$319

PhoenixWashington, D.C.

PHX Phoenix Sky Harbor Intl - IAD Washington, D.C. Dulles Intl

PHXIAD

Phoenix Sky Harbor Intl

Tue 10/20

3:42 pm-5:50 pm

1 stop23h 08m

Washington, D.C. Dulles Intl

Mon 10/26

7:24 pm-9:26 am

1 stop17h 02m

$319

PhoenixWashington, D.C.

PHX Phoenix Sky Harbor Intl - IAD Washington, D.C. Dulles Intl

PHXIAD

Phoenix Sky Harbor Intl

Fri 9/4

4:06 pm-5:40 am

1 stop10h 34m

Washington, D.C. Dulles Intl

Tue 9/8

7:35 pm-11:31 am

1 stop18h 56m

$358

PhoenixWashington, D.C.

PHX Phoenix Sky Harbor Intl - IAD Washington, D.C. Dulles Intl

PHXIAD

Phoenix Sky Harbor Intl

Fri 9/4

3:19 pm-12:32 am

1 stop6h 13m

Washington, D.C. Dulles Intl

Mon 9/7

6:30 am-10:22 am

1 stop6h 52m

$359

PhoenixWashington, D.C.

PHX Phoenix Sky Harbor Intl - IAD Washington, D.C. Dulles Intl

PHXIAD

Phoenix Sky Harbor Intl

Wed 10/14

7:38 am-5:50 pm

1 stop7h 12m

Washington, D.C. Dulles Intl

Sun 10/18

9:38 am-6:00 pm

1 stop11h 22m

$416

PhoenixWashington, D.C.

PHX Phoenix Sky Harbor Intl - IAD Washington, D.C. Dulles Intl

PHXIAD

Phoenix Sky Harbor Intl

Wed 9/9

7:08 am-6:14 pm

1 stop8h 06m

Washington, D.C. Dulles Intl

Wed 9/16

7:00 am-7:07 pm

2 stops15h 07m

$421

PhoenixWashington, D.C.

PHX Phoenix Sky Harbor Intl - IAD Washington, D.C. Dulles Intl

PHXIAD

Phoenix Sky Harbor Intl

Fri 10/23

12:15 pm-10:30 pm

1 stop7h 15m

Washington, D.C. Dulles Intl

Sun 10/25

12:55 pm-3:08 pm

Nonstop5h 13m

$445

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/12

Showing 1-10 of 22 resultsSorted by cheapest first
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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

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 $292). Flying from Phoenix to Washington, D.C. Dulles Intl Airport in February is currently the most expensive (average of $691). 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 August 13, 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 August 13, 2026.

The most flights from PH1 to IAD are scheduled on a Wednesday (6 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (5 on average).

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

Airfare is below average for this route at the moment.
Phoenix to Washington, D.C. Dulles Intl Airport flights typically cost between $392 and $504 in September.
The cheapest round-trip price found within the last 5 days was $291 on Frontier (Sep 1-Sep 10).

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 142 minutes.

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

Historically, flights departing at night 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 7% 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 55 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 August 8, 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 August 13, 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
8.0
Very good
4,219 reviews

Food

7.0

Boarding

8.1

Crew

8.6

Overall

8.0

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
6.0
Good

Lauren,Dec 2024

MCI - DCA

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.
Southwest
8.0
Very good
4,219 reviews
Southwest
8.0
Very good
4,219 reviews

Food

7.0

Boarding

8.1

Crew

8.6

Overall

8.0

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
6.0
Good

Lauren,Dec 2024

MCI - DCA

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.
Delta
7.8
Good
8,502 reviews
Southwest
8.0
Very good
4,219 reviews

Food

7.0

Boarding

8.1

Crew

8.6

Overall

8.0

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
6.0
Good

Lauren,Dec 2024

MCI - DCA

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.
United Airlines
7.4
Good
10,112 reviews
Southwest
8.0
Very good
4,219 reviews

Food

7.0

Boarding

8.1

Crew

8.6

Overall

8.0

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
6.0
Good

Lauren,Dec 2024

MCI - DCA

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.
American Airlines
7.1
Good
11,923 reviews
Southwest
8.0
Very good
4,219 reviews

Food

7.0

Boarding

8.1

Crew

8.6

Overall

8.0

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
6.0
Good

Lauren,Dec 2024

MCI - DCA

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.
Frontier
5.6
Fair
2,697 reviews
Southwest
8.0
Very good
4,219 reviews

Food

7.0

Boarding

8.1

Crew

8.6

Overall

8.0

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
6.0
Good

Lauren,Dec 2024

MCI - DCA

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

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 and Alaska Airlines can get you from Phoenix to Washington, D.C. Dulles Intl Airport in just under 8h 32m. Your travel time can differ by up to 14h 36m. 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 United Airlines, starting at $187 and $286 round-trip. Frontier is 68% 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 $105 on Frontier. Other airlines that offer cheap prices include United Airlines from $149 and Delta from $167 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 Austrian Airlines (84%), Brussels Airlines (84%) and United Airlines (84%).

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

    On average you can expect to pay $1,905 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 $185.

  • 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 $292). Flying from Phoenix to Washington, D.C. Dulles Intl Airport in February is currently the most expensive (average of $691). 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
Owings Mills
Arlington
Tysons
Springfield
Lanham
Reston
Herndon
Rockville
Chantilly
Hyattsville
Fredericksburg
Falls Church
Hanover
Laurel
Sterling
Oxon Hill
Clinton
Hunt Valley
Woodbridge

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 August 13, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$150Average$280FlexibilityNo cancel feeOn-time62%
DeltaCheapest$187Average$383FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$269Average$513FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$339Average$577FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$356Average$544FlexibilityNo cancel feeOn-time71%

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