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Dulles Intl

$117+ Cheap flights from Sky Harbor Intl (PHX) 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 12/8. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — IAD
oct. 17 — oct. 241
vie. 10/17
vie. 10/24
1 adult, Economy
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Cheapflights Tip: The best prices from Phoenix Sky Harbor Intl to Washington, D.C. Dulles Intl are usually found in August or June, booked 90 days in advance, depart on a Friday or Thursday and return on a Tuesday

Cheap flight deals from Sky Harbor Intl to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Sky Harbor Intl (PHX) 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 septiembre 17, 2025.

Round-trip from

$201
(CheapOair)

One-way from

$117
(Kiwi.com)

Popular in

January

Cheapest in

August

Average price

$368

Good round-trip deal

$417 or less

Good one-way deal

$184 or less
From Phoenix Sky Harbor Intl to Washington, D.C. Dulles Intl
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One-way flight from Phoenix Sky Harbor Intl to Washington, D.C. Dulles Intl
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Highest demand for flights based on searches. 9% potential increase in price ($41 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Phoenix Sky Harbor Intl to Washington, D.C. Dulles Intl.
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Price to beat on a one-way flight from Phoenix Sky Harbor Intl to Washington, D.C. Dulles Intl.
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Find flight deals from Sky Harbor Intl to Dulles Intl

Cheapest flights from Sky Harbor Intl to Dulles Intl
Explore the most affordable flight options available from Sky Harbor Intl to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on septiembre 17, 2025.

This CheapOair deal was found by Cheapflights users on 9/15. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/212:31 pmPHX - IAD
1 stop17h 46mFrontier
lun. 10/66:10 amIAD - PHX
2 stops36h 13mFrontier
Deal found 9/15$201
This CheapOair deal was found by Cheapflights users on 9/15. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/2210:59 pmPHX - IAD
1 stop17h 08mFrontier
lun. 10/2710:04 amIAD - PHX
1 stop15h 28mFrontier
Deal found 9/15$202
This Frontier deal was found by Cheapflights users on 9/16. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/258:05 pmPHX - IAD
1 stop10h 12mFrontier
lun. 9/296:10 amIAD - PHX
1 stop11h 47mFrontier
Deal found 9/16$207
This Gotogate deal was found by Cheapflights users on 9/15. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 10/1811:00 pmPHX - IAD
1 stop17h 17mFrontier
sáb. 10/259:38 pmIAD - PHX
1 stop18h 39mFrontier
Deal found 9/15$208
This CheapOair deal was found by Cheapflights users on 9/15. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 10/56:00 amPHX - IAD
1 stop27h 55mFrontier
sáb. 10/187:15 amIAD - PHX
2 stops15h 26mFrontier
Deal found 9/15$209
This CheapOair deal was found by Cheapflights users on 9/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/294:16 pmPHX - IAD
2 stops48h 39mFrontier
jue. 10/210:17 amIAD - PHX
1 stop11h 53mFrontier
Deal found 9/16$215
This CheapOair deal was found by Cheapflights users on 9/15. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 10/56:00 amPHX - IAD
1 stop27h 55mFrontier
dom. 10/126:15 amIAD - PHX
2 stops45h 32mFrontier
Deal found 9/15$219
This CheapOair deal was found by Cheapflights users on 9/14. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/166:00 amPHX - IAD
1 stop6h 38mFrontier
dom. 10/198:02 pmIAD - PHX
1 stop20h 15mFrontier
Deal found 9/14$222
This CheapOair deal was found by Cheapflights users on 9/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/1011:24 pmPHX - IAD
1 stop18h 29mFrontier
vie. 10/176:15 amIAD - PHX
1 stop11h 50mFrontier
Deal found 9/16$223
This Frontier deal was found by Cheapflights users on 9/16. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/245:29 pmPHX - IAD
2 stops18h 48mFrontier
mar. 10/288:47 amIAD - PHX
2 stops11h 14mFrontier
Deal found 9/16$225
This Frontier deal was found by Cheapflights users on 9/16. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/96:00 amPHX - IAD
1 stop6h 38mFrontier
sáb. 10/187:15 amIAD - PHX
2 stops15h 26mFrontier
Deal found 9/16$226
This Frontier deal was found by Cheapflights users on 9/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 11/79:34 amPHX - IAD
2 stops12h 37mFrontier
mar. 11/118:40 amIAD - PHX
2 stops10h 21mFrontier
Deal found 9/15$227

Cheapflights Fare Finder

 
Customize your flight search to find flights from Sky Harbor Intl 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 septiembre 17, 2025.
Use the filters below to find and compare flights from Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Sky Harbor Intl

Fly to

Dulles Intl

Route

Depart

Return

Price

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

mar. 10/14

12:09 pm-12:23 am

1 stop9h 14m

Washington, D.C. Dulles Intl

mar. 10/21

5:42 pm-10:39 pm

1 stop7h 57m

$273

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

mar. 10/14

10:59 pm-9:16 am

1 stop7h 17m

Washington, D.C. Dulles Intl

mar. 10/21

6:18 am-10:40 am

1 stop7h 22m

$277

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

mar. 11/11

2:18 pm-11:29 pm

1 stop7h 11m

Washington, D.C. Dulles Intl

sáb. 11/15

5:57 pm-12:08 am

1 stop8h 11m

$277

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

mar. 10/14

1:45 pm-9:06 pm

Nonstop4h 21m

Washington, D.C. Dulles Intl

mar. 10/21

5:25 pm-7:15 pm

Nonstop4h 50m

$307

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

mar. 10/14

10:40 am-5:55 pm

Nonstop4h 15m

Washington, D.C. Dulles Intl

mar. 10/21

4:50 pm-6:35 pm

Nonstop4h 45m

$307

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

mar. 10/28

10:40 am-5:55 pm

Nonstop4h 15m

Washington, D.C. Dulles Intl

sáb. 11/1

5:00 pm-6:45 pm

Nonstop4h 45m

$307

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

mar. 11/18

9:00 am-3:12 pm

Nonstop4h 12m

Washington, D.C. Dulles Intl

mié. 11/19

5:18 pm-10:40 pm

1 stop7h 22m

$317

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

mar. 10/21

8:45 am-4:12 pm

Nonstop4h 27m

Washington, D.C. Dulles Intl

mar. 10/28

6:30 am-1:10 pm

1 stop9h 40m

$317

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

sáb. 10/11

9:00 am-7:03 pm

1 stop7h 03m

Washington, D.C. Dulles Intl

sáb. 10/18

5:25 pm-7:15 pm

Nonstop4h 50m

$317

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

mar. 10/14

12:09 pm-12:23 am

1 stop9h 14m

Washington, D.C. Dulles Intl

mar. 10/28

5:40 pm-10:16 pm

1 stop7h 36m

$326

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 23 results
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The best insider tips for Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport trip
Airports
PHX

PHX offers short security lines, typically under 10 minutes, with live wait times displayed online for Terminal 4 checkpoints.

Read more about PHXby Brandon Schultz
IAD

The Washington Metro Silver line reaches IAD in under 40 minutes, offering a cost-effective transport option to the city.

Read more about IADby Ramsey Qubein
Our travel experts
Brandon Schultz

Brandon Schultz

Expert on PHX

Brandon Schultz

Brandon Schultz

Brandon Schultz is an award-winning food and travel writer based in New York City. His work has appeared in Forbes, AAA, Thrillist, Travel + Leisure, and The Daily Meal, among many others, and he is the author of 6 books, including 3 cookbooks.

Read more
Ramsey Qubein

Ramsey Qubein

Expert on IAD

Ramsey Qubein

Ramsey Qubein

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read more

Best time to book a flight from Sky Harbor Intl to Dulles Intl

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

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

Use this chart to determine the optimal time to book a round-trip flight from Sky Harbor Intl to Dulles Intl. Price data was last updated on September 12, 2025.

To ensure you get the cheapest price possible for a flight from Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport, you should look to book at least 90 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, August is the cheapest month in which you can book a flight from Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport (average of $292). Flying from Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport in April 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 PHX to IAD?

Find hourly flight availability from Sky Harbor Intl 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 septiembre 17, 2025.

It’s typically best to fly out from Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport in the evening. Doing so could potentially save you 41% on the flight price compared to flying at noon, which is usually more expensive.

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

Use this chart to determine the cheapest time to fly round-trip from Sky Harbor Intl to Dulles Intl. Price data was last updated on September 14, 2025.

Travelers seeking maximum savings on their Phoenix Sky Harbor Intl Airport 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 septiembre 17, 2025.
Read through reviews of airlines operating flights from Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport, such as Southwest, Delta, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,242 reviews

Boarding

8.1

Overall

8.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,242 reviews
Southwest
8.0
Very good
4,242 reviews

Boarding

8.1

Overall

8.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Delta
8.0
Very good
7,961 reviews
Southwest
8.0
Very good
4,242 reviews

Boarding

8.1

Overall

8.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
United Airlines
7.4
Good
8,926 reviews
Southwest
8.0
Very good
4,242 reviews

Boarding

8.1

Overall

8.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Frontier
5.8
Fair
3,173 reviews
Southwest
8.0
Very good
4,242 reviews

Boarding

8.1

Overall

8.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Related info for your journey

Find useful and relevant information for your journey from Sky Harbor Intl 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 Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport?

    There are many flights that can get you from Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport in 4h 21m. Fly via Alaska Airlines, Delta, or United Airlines to get the fastest option. The distance between Phoenix Sky Harbor Intl Airport 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 Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport round-trip?

    Currently priced at $147, Frontier will fly you from Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Southwest and United Airlines - these airlines can fly you to your destination from $237 and $268, respectively. Frontier is currently priced 62% below the average price you’ll pay for this route.

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

    Consider United Airlines (86%), Austrian Airlines (84%) or Brussels Airlines (84%) when booking your flight. These represent the most reliable airlines when flying from Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport.

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

    Looking at all options, your cheapest flight can be booked for $143. While the most popular route (Phoenix Sky Harbor Intl - Washington, D.C. Dulles Intl) can be booked for $163 on average, our data indicates $955 when flying from Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport (average of $292). Flying from Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport in April 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

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
Woodbridge
Arlington
Alexandria
Tysons
Silver Spring
Springfield
Gaithersburg
Fredericksburg
Linthicum Heights
Fairfax
Falls Church
Owings Mills
Manassas
Rockville
Hanover
Oxon Hill
Laurel
Towson
National Harbor
Dundalk

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Alternative routes for Sky Harbor Intl to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.
Sky Harbor Intl to Baltimore flights
Sky Harbor Intl to Reagan-National flights

Top 4 airlines flying from Sky Harbor Intl to Dulles Intl

Discover the top 4 airlines that operate flights from Sky Harbor Intl 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 septiembre 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$147Average$268FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$237Average$388FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$268Average$401FlexibilityNo cancel feeOn-time69%
DeltaCheapest$276Average$318FlexibilityNo cancel feeOn-timeN/A

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