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Dulles Intl

$136+ 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 5/29. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — IAD
Jun 4 — Jun 111
Thu 6/4
Thu 6/11
1 adult, Economy
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Find cheap flights from Phoenix to Dulles Intl with Cheapflights

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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 70 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 May 5, 2026.

This Frontier deal was found by Cheapflights users on 5/1. 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 5/2110:27 pm
PHX
-
IAD
1 stop6h 45m
Frontier
Mon 5/251:31 pm
IAD
-
PHX
1 stop8h 04m
Frontier
Deal found 5/1$280
This Kiwi.com deal was found by Cheapflights users on 5/2. 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 6/3010:32 pm
PHX
-
IAD
1 stop6h 53m
Frontier
Wed 7/112:32 pm
IAD
-
PHX
2 stops12h 48m
Frontier
Deal found 5/2$281
This eDestinos deal was found by Cheapflights users on 5/4. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/225:15 am
PHX
-
IAD
2 stops38h 54m
Frontier
Tue 5/267:37 pm
IAD
-
PHX
1 stop27h 56m
Frontier
Deal found 5/4$282
This Kiwi.com deal was found by Cheapflights users on 5/4. 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 5/2810:27 pm
PHX
-
IAD
1 stop6h 45m
Frontier
Fri 5/2911:07 am
IAD
-
PHX
2 stops14h 14m
Frontier
Deal found 5/4$283
This Kiwi.com deal was found by Cheapflights users on 5/2. 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.
Fri 5/2910:27 pm
PHX
-
IAD
1 stop6h 45m
Frontier
Tue 6/211:07 am
IAD
-
PHX
2 stops10h 28m
Frontier
Deal found 5/2$284
This Expedia deal was found by Cheapflights users on 5/2. 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.
Tue 5/1211:30 pm
PHX
-
IAD
1 stop7h 42m
Frontier
Tue 5/195:26 pm
IAD
-
PHX
1 stop8h 00m
Frontier
Deal found 5/2$285
This Frontier deal was found by Cheapflights users on 5/4. 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 5/1811:30 pm
PHX
-
IAD
1 stop7h 42m
Frontier
Wed 5/2011:12 am
IAD
-
PHX
1 stop12h 21m
Frontier
Deal found 5/4$286
This Trip.com deal was found by Cheapflights users on 5/4. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2810:27 pm
PHX
-
IAD
1 stop6h 45m
Frontier
Mon 6/111:07 am
IAD
-
PHX
1 stop12h 26m
Frontier
Deal found 5/4$287
This Kiwi.com deal was found by Cheapflights users on 5/2. 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.
Fri 5/2910:27 pm
PHX
-
IAD
1 stop6h 45m
Multiple Airlines
Tue 6/26:00 am
IAD
-
PHX
1 stop9h 45m
Multiple Airlines
Deal found 5/2$288
This Kiwi.com deal was found by Cheapflights users on 5/4. 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 5/2912:20 am
PHX
-
IAD
1 stop15h 12m
Frontier
Tue 6/211:07 am
IAD
-
PHX
2 stops10h 28m
Frontier
Deal found 5/4$289
This Frontier deal was found by Cheapflights users on 5/5. 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.
Sun 6/710:27 pm
PHX
-
IAD
1 stop6h 45m
Frontier
Sun 6/284:32 pm
IAD
-
PHX
1 stop9h 32m
Frontier
Deal found 5/5$290
This Kiwi.com deal was found by Cheapflights users on 5/2. 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 6/1810:32 pm
PHX
-
IAD
1 stop6h 53m
Frontier
Mon 6/228:57 pm
IAD
-
PHX
2 stops18h 45m
Frontier
Deal found 5/2$291

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 May 5, 2026.

Round-trip from

$280
(Frontier)

One-way from

$136
(Kiwi.com)

Popular in

February

Cheapest in

January

Average price

$439
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. 15% potential increase in price ($79 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($29 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 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 May 5, 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

Mon 6/1

4:23 pm-5:42 pm

1 stop22h 19m

Washington, D.C. Dulles Intl

Sat 6/6

7:37 pm-11:22 am

1 stop18h 45m

$367

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Sun 6/7

11:50 pm-9:24 am

1 stop6h 34m

Washington, D.C. Dulles Intl

Wed 6/10

5:50 pm-7:46 pm

Nonstop4h 56m

$433
Quickest round-trip

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Thu 5/28

9:45 am-5:05 pm

Nonstop4h 20m

Washington, D.C. Dulles Intl

Wed 6/3

5:30 pm-7:40 pm

Nonstop5h 10m

$453

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Thu 5/28

1:31 pm-12:45 am

1 stop8h 14m

Washington, D.C. Dulles Intl

Tue 6/2

5:50 pm-7:46 pm

Nonstop4h 56m

$455

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Thu 5/28

6:59 pm-5:27 am

1 stop7h 28m

Washington, D.C. Dulles Intl

Thu 6/4

5:50 pm-7:46 pm

Nonstop4h 56m

$463

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Fri 6/26

7:47 pm-6:58 am

1 stop8h 11m

Washington, D.C. Dulles Intl

Mon 6/29

5:50 pm-7:46 pm

Nonstop4h 56m

$473

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Sat 5/16

7:45 am-3:05 pm

Nonstop4h 20m

Washington, D.C. Dulles Intl

Sat 5/23

5:05 pm-9:10 pm

1 stop7h 05m

$491

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Fri 6/19

8:50 am-4:17 pm

Nonstop4h 27m

Washington, D.C. Dulles Intl

Sun 6/21

6:10 am-11:06 am

1 stop7h 56m

$563

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Sat 6/20

11:50 pm-9:25 am

1 stop6h 35m

Washington, D.C. Dulles Intl

Fri 6/26

5:50 pm-7:46 pm

Nonstop4h 56m

$598

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Sat 5/16

7:45 am-3:05 pm

Nonstop4h 20m

Washington, D.C. Dulles Intl

Tue 5/19

5:30 pm-7:40 pm

Nonstop5h 10m

$609

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/2

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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?

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 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 May 5, 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 28% 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 May 2, 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 May 5, 2026.

The most flights from PH1 to IAD are scheduled on a Monday (10 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (7 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 132 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.

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 May 5, 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
4,305 reviews

Entertainment

7.5

Boarding

8.1

Food

7.0

Overall

7.9

Comfort

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
7.9
Good
4,305 reviews
Southwest
7.9
Good
4,305 reviews

Entertainment

7.5

Boarding

8.1

Food

7.0

Overall

7.9

Comfort

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Delta
7.9
Good
8,459 reviews
Southwest
7.9
Good
4,305 reviews

Entertainment

7.5

Boarding

8.1

Food

7.0

Overall

7.9

Comfort

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
United Airlines
7.4
Good
9,684 reviews
Southwest
7.9
Good
4,305 reviews

Entertainment

7.5

Boarding

8.1

Food

7.0

Overall

7.9

Comfort

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Frontier
5.6
Fair
2,965 reviews
Southwest
7.9
Good
4,305 reviews

Entertainment

7.5

Boarding

8.1

Food

7.0

Overall

7.9

Comfort

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

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 Southwest can get you from Phoenix to Washington, D.C. Dulles Intl Airport in just under 4h 20m. Your travel time can differ by up to 17h 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 $147 on this airline. Additional options worth looking into are Delta and United Airlines, starting at $187 and $259 round-trip. Frontier is 66% 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 Southwest from $119 and United Airlines from $126 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 (93%), Brussels Airlines (93%) and Avianca (93%).

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

    On average you can expect to pay $1,147 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 $191.

  • 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
Tysons
Owings Mills
Springfield
Arlington
Silver Spring
Herndon
Rockville
Hyattsville
Manassas
Fredericksburg
Woodbridge
Hanover
Laurel
Largo
Upper Marlboro
Waldorf
Clinton
Hunt Valley
Cordova

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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 May 5, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$147Average$255FlexibilityNo cancel feeOn-time62%
DeltaCheapest$187Average$358FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$259Average$459FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$268Average$493FlexibilityNo cancel feeOn-time63%

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