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Cheap flights from Phoenix Sky Harbor Intl Airport to Washington, D.C. from $126

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Phoenix Sky Harbor Intl Airport to Washington, D.C. departing on 1/30. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Phoenix Sky Harbor Intl Airport to Washington, D.C.

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
6:00 am - 4:33 pm
PHX
-
IAD
8h 33m1 stop
Multiple Airlines Logo
8:00 am - 4:21 pm
IAD
-
PHX
10h 21m1 stop
$214Multiple Airlines
Fri, Feb 6 - Tue, Feb 10
Frontier Logo
6:30 am - 8:56 pm
PHX
-
IAD
12h 26m1 stop
Frontier Logo
6:00 am - 3:13 pm
IAD
-
PHX
11h 13m1 stop
$217Frontier
Thu, Jan 8 - Sun, Jan 11
Multiple Airlines Logo
6:16 pm - 10:44 am
PHX
-
IAD
38h 28m2 stops
Multiple Airlines Logo
8:00 am - 4:21 pm
IAD
-
PHX
10h 21m1 stop
$225Multiple Airlines
Thu, Feb 5 - Tue, Feb 10
Multiple Airlines Logo
4:34 pm - 9:55 am
PHX
-
IAD
15h 21m1 stop
Multiple Airlines Logo
8:00 am - 4:21 pm
IAD
-
PHX
10h 21m1 stop
$226Multiple Airlines
Thu, Feb 5 - Tue, Feb 10
Frontier Logo
6:00 am - 4:28 pm
PHX
-
IAD
8h 28m1 stop
Frontier Logo
10:50 am - 11:08 pm
IAD
-
PHX
14h 18m1 stop
$238Frontier
Thu, Jan 29 - Fri, Jan 30
United Airlines Logo
11:35 pm - 5:50 am
PHX
-
IAD
4h 15mnonstop
United Airlines Logo
5:40 pm - 8:52 pm
IAD
-
PHX
5h 12mnonstop
$240United Airlines
Wed, Dec 24 - Wed, Dec 31
Multiple Airlines Logo
4:21 pm - 9:55 am
PHX
-
IAD
39h 34m2 stops
Multiple Airlines Logo
8:00 am - 4:21 pm
IAD
-
PHX
10h 21m1 stop
$246Multiple Airlines
Wed, Feb 4 - Wed, Feb 11
Multiple Airlines Logo
6:06 am - 6:09 pm
PHX
-
IAD
10h 03m1 stop
Multiple Airlines Logo
9:58 pm - 11:49 pm
IAD
-
PHX
27h 51m1 stop
$248Multiple Airlines
Thu, Dec 25 - Tue, Dec 30
United Airlines Logo
11:35 pm - 5:50 am
PHX
-
IAD
4h 15mnonstop
United Airlines Logo
2:24 pm - 9:41 pm
IAD
-
PHX
9h 17m1 stop
$250United Airlines
Wed, Dec 24 - Wed, Dec 31
Frontier Logo
8:42 am - 12:31 am
PHX
-
IAD
12h 49m1 stop
Frontier Logo
8:09 am - 11:44 pm
IAD
-
PHX
18h 35m1 stop
$251Frontier
Thu, Mar 12 - Mon, Mar 23

Frontier flights from Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport

Our best Frontier deals on Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport flight tickets
Frontier
Jan 8
PHX6:30 amPhoenix Sky Harbor Intl
12h 26m
1 stop
IAD8:56 pmWashington, D.C. Dulles Intl
Jan 11
IAD6:00 amWashington, D.C. Dulles Intl
11h 13m
1 stop
PHX3:13 pmPhoenix Sky Harbor Intl
$217
Find similar
Frontier
Jan 29
PHX6:00 amPhoenix Sky Harbor Intl
8h 28m
1 stop
IAD4:28 pmWashington, D.C. Dulles Intl
Jan 30
IAD10:50 amWashington, D.C. Dulles Intl
14h 18m
1 stop
PHX11:08 pmPhoenix Sky Harbor Intl
$238
Find similar
Frontier
Mar 12
PHX8:42 amPhoenix Sky Harbor Intl
12h 49m
1 stop
IAD12:31 amWashington, D.C. Dulles Intl
Mar 23
IAD8:09 amWashington, D.C. Dulles Intl
18h 35m
1 stop
PHX11:44 pmPhoenix Sky Harbor Intl
$251
Find similar

United Airlines flights from Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport

Our best United Airlines deals on Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport flight tickets
United Airlines
Dec 24
PHX11:35 pmPhoenix Sky Harbor Intl
4h 15m
IAD5:50 amWashington, D.C. Dulles Intl
Dec 31
IAD5:40 pmWashington, D.C. Dulles Intl
5h 12m
PHX8:52 pmPhoenix Sky Harbor Intl
$240
Find similar
United Airlines
Dec 24
PHX11:35 pmPhoenix Sky Harbor Intl
4h 15m
IAD5:50 amWashington, D.C. Dulles Intl
Dec 31
IAD2:24 pmWashington, D.C. Dulles Intl
9h 17m
1 stop
PHX9:41 pmPhoenix Sky Harbor Intl
$250
Find similar
United Airlines
Jan 14
PHX10:40 amPhoenix Sky Harbor Intl
8h 31m
1 stop
IAD9:11 pmWashington, D.C. Dulles Intl
Jan 20
IAD12:50 pmWashington, D.C. Dulles Intl
5h 14m
PHX4:04 pmPhoenix Sky Harbor Intl
$271
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport 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, momondo users made 832,500 searches. Data last updated December 14, 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

Fly to

Route

Depart

Return

Price

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Fri 2/6

6:00 am-4:33 pm

1 stop8h 33m

Washington, D.C. Dulles Intl

Tue 2/10

8:00 am-4:21 pm

1 stop10h 21m

$214

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Thu 1/8

6:30 am-8:56 pm

1 stop12h 26m

Washington, D.C. Dulles Intl

Sun 1/11

6:00 am-3:13 pm

1 stop11h 13m

$217

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Thu 2/5

6:16 pm-10:44 am

2 stops38h 28m

Washington, D.C. Dulles Intl

Tue 2/10

8:00 am-4:21 pm

1 stop10h 21m

$225

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Thu 2/5

4:34 pm-9:55 am

1 stop15h 21m

Washington, D.C. Dulles Intl

Tue 2/10

8:00 am-4:21 pm

1 stop10h 21m

$226

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Thu 1/29

6:00 am-4:28 pm

1 stop8h 28m

Washington, D.C. Dulles Intl

Fri 1/30

10:50 am-11:08 pm

1 stop14h 18m

$238

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Wed 12/24

11:35 pm-5:50 am

Nonstop4h 15m

Washington, D.C. Dulles Intl

Wed 12/31

5:40 pm-8:52 pm

Nonstop5h 12m

$240

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Wed 2/4

4:21 pm-9:55 am

2 stops39h 34m

Washington, D.C. Dulles Intl

Wed 2/11

8:00 am-4:21 pm

1 stop10h 21m

$246

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Thu 12/25

6:06 am-6:09 pm

1 stop10h 03m

Washington, D.C. Dulles Intl

Tue 12/30

9:58 pm-11:49 pm

1 stop27h 51m

$248

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Wed 12/24

11:35 pm-5:50 am

Nonstop4h 15m

Washington, D.C. Dulles Intl

Wed 12/31

2:24 pm-9:41 pm

1 stop9h 17m

$250

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Thu 3/12

8:42 am-12:31 am

1 stop12h 49m

Washington, D.C. Dulles Intl

Mon 3/23

8:09 am-11:44 pm

1 stop18h 35m

$251

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Washington, D.C. from

How to get the cheapest flight ticket from Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Washington, D.C. Dulles Intl Airport?

In general, August is the cheapest month to fly from Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $299. If you aren’t able to travel to Washington, D.C. Dulles Intl Airport during the month of August, then flying in June is also cheap. Prices for this month can be found on momondo for an average of $350.

What is the cheapest day to depart on your flight to Washington, D.C. Dulles Intl Airport?

Our data shows that Friday is the least expensive day to fly to Washington, D.C. Dulles Intl Airport. Tickets to fly out on this day can be as low as $485. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport for around $770.

What is the cheapest time of day to depart on your flight to Washington, D.C. Dulles Intl Airport?

Flying to Washington, D.C. Dulles Intl Airport from Phoenix Sky Harbor Intl Airport in the evening is the least expensive time of day to depart. momondo users have found prices as low as $452 when looking at flights departing in the evening. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $773 on average. Flights to Washington, D.C. Dulles Intl Airport from Phoenix Sky Harbor Intl Airport at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest Phoenix Sky Harbor Intl to Washington, D.C. Dulles Intl flight route?

Fly from Phoenix Sky Harbor Intl to Washington, D.C. Dulles Intl for the best Phoenix Sky Harbor Intl - Washington, D.C. Dulles Intl flight prices

How far in advance should I book a flight to Washington, D.C. Dulles Intl Airport?

You are more likely to see cheaper flights to Washington, D.C. Dulles Intl Airport from Phoenix Sky Harbor Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. Dulles Intl Airport for around $392 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. Dulles Intl Airport from Phoenix Sky Harbor Intl Airport for as low as $286 on momondo.

What cabin class options are available on Phoenix Sky Harbor Intl to Washington, D.C. Dulles Intl flights?

There are 4 cabin classes available to choose from on Phoenix Sky Harbor Intl to Washington, D.C. Dulles Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport flights?

No. A direct flight is the cheapest option for a flight between Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport.

How have Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport flight prices changed over time?

As of December 2025, prices for Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport flights are approximately 28% more expensive when compared to flights at the same time last year.

When to book flights from Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport (PHX to IAD) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport

Best Price Found

$185

Fastest flight time

4h 00m

Direct flights

Every day
The best one-way flight to Washington, D.C. Dulles Intl Airport from Phoenix Sky Harbor Intl Airport in the past 72 hours is $185. The best round-trip flight deal from Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport found on momondo in the last 72 hours is $415.
The fastest flight from Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport takes 4h 00m
Direct flights go from Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport every day.
Search flight deals

  • How far is Phoenix Sky Harbor Intl to Washington, D.C. Dulles Intl by plane?

    The distance between Phoenix Sky Harbor Intl and Washington, D.C. Dulles Intl is about 1950.3 mi. 4h 00m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport?

    Prices for flights from Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport were last updated today.

  • How many operators does momondo search for flights from Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport?

  • How old do you have to be to fly from Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport.

  • What documentation or ID do you need to fly to Washington, D.C. Dulles Intl Airport?

    The necessary travel and health documents for your Washington, D.C. Dulles Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport?

  • What is the most popular airline from Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport?

Best airlines flying from Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport

Compare and see reviews for airlines that fly from Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $146Free CancellationRating
5.8
3,081 reviews
Search Frontier flights
DeltaPriceFrom $188Free CancellationRating
7.9
8,007 reviews
Search Delta flights
SouthwestPriceFrom $234Free CancellationRating
7.9
4,250 reviews
Search Southwest flights
United AirlinesPriceFrom $264Free CancellationRating
7.4
9,092 reviews
Search United Airlines flights

  • Southwest Flights From Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport

    Across 6 Southwest flights from Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport this week, the average price was $401, with the best Southwest deals starting from $234 round-trip. 4,250 users have rated Southwest on momondo, with an average score of 7.9/10.

  • United Airlines Flights From Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport

    $264 is the best United Airlines flight deal from Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport found on momondo over the last 72 hours. The average United Airlines ticket price found was closer to $407, however, with flight time and availability significantly affecting the price. United Airlines (7.4/10 from 9,092 user reviews) flies into Washington, D.C. Dulles Intl Airport from Phoenix Sky Harbor Intl Airport 10 times in an average week so prices can vary.

Traveling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
National Harbor
Gettysburg
Arlington
Winchester
Woodbridge
Waldorf
Tysons
Laurel
Colonial Beach
Silver Spring
Fredericksburg
Towson
Harpers Ferry
Rockville
Gaithersburg
Reston
Manassas
Sterling
Fairfax

Why use momondo?

Why should I use momondo to find a flight deal from Phoenix to Washington, D.C.?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Phoenix to Washington, D.C.. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Phoenix to Washington, D.C. with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Washington, D.C. from Phoenix with this policy.

How can momondo help me find flights from Phoenix to Washington, D.C.?

momondo provides multiple filters to help you find the best flight to Washington, D.C. from Phoenix. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Phoenix to Washington, D.C. right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Phoenix to Washington, D.C. now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Washington, D.C. and let you know when they change.

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