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Dulles Intl

$188+ Cheap flights from Phoenix to Dulles Intl (IAD)

PHX — IAD
Dec 10 — Dec 171
Thu 12/10
Thu 12/17
1 adult, Economy
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1. Tell us where you want to go

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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 72 days in advance, depart on a Friday or Wednesday and return on a Saturday

Cheap flight deals from Phoenix to Dulles Intl

Cheapest flights from Phoenix to Dulles Intl

Wed 12/22:54 pm -
Nonstop4h 15m
Thu 12/35:55 pm -
Nonstop5h 18m
Deal found 11/5$379
Wed 12/211:31 am -
1 stop6h 41m
Tue 12/812:06 pm -
2 stops14h 07m
Deal found 11/5$380
Wed 12/305:30 am -
2 stops17h 21m
Tue 1/55:30 am -
2 stops20h 27m
Deal found 11/9$381
Sun 12/69:29 pm -
1 stop20h 41m
Sun 12/138:55 pm -
1 stop15h 46m
Deal found 11/8$382
Wed 11/2512:30 pm -
1 stop14h 40m
Fri 11/271:09 pm -
1 stop24h 16m
Deal found 11/9$383
Wed 12/237:47 am -
1 stop9h 44m
Tue 12/298:29 pm -
1 stop12h 13m
Deal found 11/7$384
Sat 11/213:11 pm -
1 stop11h 59m
Mon 11/231:09 pm -
1 stop7h 40m
Deal found 11/9$385
Fri 11/203:11 pm -
1 stop11h 59m
Tue 11/249:35 pm -
1 stop16h 16m
Deal found 11/8$387
Fri 11/203:11 pm -
1 stop11h 59m
Sun 11/221:09 pm -
1 stop13h 24m
Deal found 11/7$388
Tue 12/18:30 am -
1 stop6h 49m
Thu 12/35:55 pm -
Nonstop5h 18m
Deal found 11/5$389
Fri 11/203:11 pm -
1 stop11h 59m
Mon 11/239:35 pm -
1 stop16h 16m
Deal found 11/7$390

Find flight deals from Phoenix to Dulles Intl

Round-trip from

$379
(United Airlines)

One-way from

$188
(Super.com)

Popular in

February

Cheapest in

January

Average price

$505
From Phoenix to Washington, D.C. Dulles Intl
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One-way flight from Phoenix to Washington, D.C. Dulles Intl
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Highest demand for flights based on searches. 2% potential increase in price ($15 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($23 potential savings vs. average RT price).
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Average for round-trip flights in November 2026
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Cheapflights Fare Finder

 
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

Fri 12/11

2:54 pm-9:09 pm

Nonstop4h 15m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-10:00 pm

Nonstop0h 00m

$211

PhoenixWashington, D.C.

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

PHXIAD

Phoenix Sky Harbor Intl

Wed 12/9

8:05 am-5:39 pm

1 stop7h 34m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-10:00 pm

Nonstop0h 00m

$215

PhoenixWashington, D.C.

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

PHXIAD

Phoenix Sky Harbor Intl

Fri 11/13

8:00 am-5:40 pm

1 stop7h 40m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-10:00 pm

Nonstop0h 00m

$260

PhoenixWashington, D.C.

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

PHXIAD

Phoenix Sky Harbor Intl

Mon 1/18

12:20 pm-5:50 pm

1 stop27h 30m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-10:00 pm

Nonstop0h 00m

$265

PhoenixWashington, D.C.

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

PHXIAD

Phoenix Sky Harbor Intl

Wed 11/18

11:33 am-11:46 am

1 stop22h 13m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-10:00 pm

Nonstop0h 00m

$273

PhoenixWashington, D.C.

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

PHXIAD

Phoenix Sky Harbor Intl

Sat 11/21

7:56 pm-11:46 am

1 stop13h 50m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-10:00 pm

Nonstop0h 00m

$273

PhoenixWashington, D.C.

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

PHXIAD

Phoenix Sky Harbor Intl

Mon 1/18

7:50 am-6:40 pm

1 stop8h 50m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-10:00 pm

Nonstop0h 00m

$290
Quickest round-trip

PhoenixWashington, D.C.

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

PHXIAD

Phoenix Sky Harbor Intl

Mon 12/28

11:58 pm-6:10 am

Nonstop4h 12m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-10:00 pm

Nonstop0h 00m

$299

PhoenixWashington, D.C.

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

PHXIAD

Phoenix Sky Harbor Intl

Thu 12/3

2:54 pm-9:09 pm

Nonstop4h 15m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-10:00 pm

Nonstop0h 00m

$308

PhoenixWashington, D.C.

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

PHXIAD

Phoenix Sky Harbor Intl

Sun 12/6

2:54 pm-9:09 pm

Nonstop4h 15m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-10:00 pm

Nonstop0h 00m

$308

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/5

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

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 $739). 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?

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 29% 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

The most flights from PH1 to IAD are scheduled on a Monday (8 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?

Airfare is below average for this route at the moment.
Phoenix to Washington, D.C. Dulles Intl Airport flights typically cost between $398 and $751 in December.
The cheapest round-trip price found within the last 5 days was $379 on United Airlines (Dec 2-Dec 3).

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 129 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 70 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?

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. Thursday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Dulles Intl

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

Crew

8.6

Food

7.0

Boarding

8.1

Overall

8.0

Comfort

8.0

Entertainment

7.4

Reviews

1 / 20
8.0
Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.
Southwest
8.0
Very good
4,219 reviews
Southwest
8.0
Very good
4,219 reviews

Crew

8.6

Food

7.0

Boarding

8.1

Overall

8.0

Comfort

8.0

Entertainment

7.4

Reviews

1 / 20
8.0
Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.
Delta
7.8
Good
8,700 reviews
Southwest
8.0
Very good
4,219 reviews

Crew

8.6

Food

7.0

Boarding

8.1

Overall

8.0

Comfort

8.0

Entertainment

7.4

Reviews

1 / 20
8.0
Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.
United Airlines
7.3
Good
10,474 reviews
Southwest
8.0
Very good
4,219 reviews

Crew

8.6

Food

7.0

Boarding

8.1

Overall

8.0

Comfort

8.0

Entertainment

7.4

Reviews

1 / 20
8.0
Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.
American Airlines
7.0
Good
12,228 reviews
Southwest
8.0
Very good
4,219 reviews

Crew

8.6

Food

7.0

Boarding

8.1

Overall

8.0

Comfort

8.0

Entertainment

7.4

Reviews

1 / 20
8.0
Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.
Frontier
5.5
Fair
2,506 reviews
Southwest
8.0
Very good
4,219 reviews

Crew

8.6

Food

7.0

Boarding

8.1

Overall

8.0

Comfort

8.0

Entertainment

7.4

Reviews

1 / 20
8.0
Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.

Related info for your journey

  • How long is the flight from Phoenix to Washington, D.C. Dulles Intl Airport?

    United Airlines, Delta, and Alaska Airlines can get you from Phoenix to Washington, D.C. Dulles Intl Airport in just under 4h 12m. Your travel time can differ by up to 19h 07m. 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 $331 round-trip. Frontier is 69% 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 $111 on Frontier. Other airlines that offer cheap prices include Delta from $167 and United Airlines from $173 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 Lufthansa (88%), United Airlines (87%) and Avianca (80%).

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

    On average you can expect to pay $1,117 for a flight from Phoenix to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is $223 while the most popular route, (Phoenix Sky Harbor Intl - Washington, D.C. Dulles Intl) is currently priced at $259.

  • 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 $739). 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
Chantilly
Woodbridge
Arlington
Sterling
Lanham
Reston
Herndon
Hyattsville
Springfield
Fairfax
Fredericksburg
Falls Church
Rockville
Towson
Silver Spring
Oxon Hill
Laurel
Hunt Valley
Clinton

Browse thousands of different options on Cheapflights for your next trip

Top 5 airlines flying from Phoenix to Dulles Intl

AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$150Average$321FlexibilityNo cancel feeOn-time62%
DeltaCheapest$187Average$383FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$269Average$527FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$356Average$458FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$385Average$589FlexibilityNo cancel feeOn-time63%

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