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Cheap flights from Phoenix Sky Harbor Intl Airport to Washington, D.C. from $121

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 3/17. 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.
Frontier Logo
11:10 am - 12:31 am
PHX
-
IAD
10h 21m
1 stop
Frontier Logo
6:00 am - 11:47 pm
IAD
-
PHX
20h 47m
2 stops
$244Frontier
Tue, Mar 31 - Wed, Apr 8
Frontier Logo
8:00 am - 12:36 am
PHX
-
IAD
13h 36m
1 stop
Frontier Logo
9:51 am - 3:26 pm
IAD
-
PHX
8h 35m
1 stop
$245Frontier
Wed, Apr 15 - Sun, Apr 19
Frontier Logo
8:35 am - 12:36 am
PHX
-
IAD
13h 01m
1 stop
Frontier Logo
6:20 am - 5:29 pm
IAD
-
PHX
14h 09m
1 stop
$246Frontier
Thu, Apr 9 - Tue, Apr 14
Alaska Airlines Logo
6:28 pm - 5:41 pm
PHX
-
IAD
20h 13m
1 stop
Alaska Airlines Logo
9:00 am - 3:51 pm
IAD
-
PHX
9h 51m
1 stop
$247Alaska Airlines
Tue, Apr 21 - Tue, Apr 28
Frontier Logo
11:59 pm - 9:25 am
PHX
-
IAD
31h 26m
1 stop
Frontier Logo
8:09 am - 12:44 am
IAD
-
PHX
18h 35m
1 stop
$248Frontier
Tue, Mar 3 - Sat, Mar 7
Frontier Logo
6:00 am - 4:24 pm
PHX
-
IAD
8h 24m
1 stop
Frontier Logo
8:09 am - 11:44 pm
IAD
-
PHX
18h 35m
1 stop
$250Frontier
Fri, Feb 27 - Mon, Mar 9
Frontier Logo
5:20 am - 6:19 pm
PHX
-
IAD
10h 59m
1 stop
Frontier Logo
8:09 am - 12:44 am
IAD
-
PHX
18h 35m
1 stop
$251Frontier
Sun, Mar 1 - Sat, Mar 7
Multiple Airlines Logo
11:59 pm - 8:09 am
PHX
-
IAD
30h 10m
1 stop
Multiple Airlines Logo
6:20 pm - 11:40 am
IAD
-
PHX
19h 20m
1 stop
$253Multiple Airlines
Sat, Feb 21 - Tue, Feb 24
Frontier Logo
12:59 am - 7:24 am
PHX
-
IAD
28h 25m
1 stop
Frontier Logo
6:20 am - 12:10 pm
IAD
-
PHX
8h 50m
1 stop
$254Frontier
Thu, Mar 5 - Wed, Mar 11
Frontier Logo
5:05 am - 5:57 pm
PHX
-
IAD
10h 52m
1 stop
Frontier Logo
10:20 am - 12:55 am
IAD
-
PHX
16h 35m
1 stop
$255Frontier
Thu, Feb 19 - Mon, Mar 2

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

Our best Delta deals on Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport flight tickets
Delta
Mar 28
PHX10:30 pmPhoenix Sky Harbor Intl
7h 40m
1 stop
IAD9:10 amWashington, D.C. Dulles Intl
Apr 7
IAD12:14 pmWashington, D.C. Dulles Intl
9h 04m
1 stop
PHX6:18 pmPhoenix Sky Harbor Intl
$273
Delta
Mar 28
PHX10:30 pmPhoenix Sky Harbor Intl
7h 40m
1 stop
IAD9:10 amWashington, D.C. Dulles Intl
Mar 31
IAD3:35 pmWashington, D.C. Dulles Intl
10h 14m
1 stop
PHX10:49 pmPhoenix Sky Harbor Intl
$291
Delta
May 27
PHX11:46 pmPhoenix Sky Harbor Intl
6h 30m
1 stop
IAD9:16 amWashington, D.C. Dulles Intl
May 30
IAD5:16 pmWashington, D.C. Dulles Intl
6h 51m
1 stop
PHX9:07 pmPhoenix Sky Harbor Intl
$299

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
Mar 4
PHX3:12 pmPhoenix Sky Harbor Intl
4h 13m
IAD9:25 pmWashington, D.C. Dulles Intl
Mar 11
IAD5:28 pmWashington, D.C. Dulles Intl
5h 19m
PHX7:47 pmPhoenix Sky Harbor Intl
$285
United Airlines
Mar 7
PHX7:36 pmPhoenix Sky Harbor Intl
7h 41m
1 stop
IAD5:17 amWashington, D.C. Dulles Intl
Mar 21
IAD6:00 amWashington, D.C. Dulles Intl
8h 16m
1 stop
PHX11:16 amPhoenix Sky Harbor Intl
$296
United Airlines
Feb 17
PHX8:38 amPhoenix Sky Harbor Intl
4h 20m
IAD2:58 pmWashington, D.C. Dulles Intl
Feb 24
IAD5:33 pmWashington, D.C. Dulles Intl
5h 18m
PHX8:51 pmPhoenix Sky Harbor Intl
$468

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 February 3, 2026.
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

Tue 3/31

11:10 am-12:31 am

1 stop10h 21m

Washington, D.C. Dulles Intl

Wed 4/8

6:00 am-11:47 pm

2 stops20h 47m

$244

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Wed 4/15

8:00 am-12:36 am

1 stop13h 36m

Washington, D.C. Dulles Intl

Sun 4/19

9:51 am-3:26 pm

1 stop8h 35m

$245

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Thu 4/9

8:35 am-12:36 am

1 stop13h 01m

Washington, D.C. Dulles Intl

Tue 4/14

6:20 am-5:29 pm

1 stop14h 09m

$246

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Tue 4/21

6:28 pm-5:41 pm

1 stop20h 13m

Washington, D.C. Dulles Intl

Tue 4/28

9:00 am-3:51 pm

1 stop9h 51m

$247

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Tue 3/3

11:59 pm-9:25 am

1 stop31h 26m

Washington, D.C. Dulles Intl

Sat 3/7

8:09 am-12:44 am

1 stop18h 35m

$248

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Fri 2/27

6:00 am-4:24 pm

1 stop8h 24m

Washington, D.C. Dulles Intl

Mon 3/9

8:09 am-11:44 pm

1 stop18h 35m

$250

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Sun 3/1

5:20 am-6:19 pm

1 stop10h 59m

Washington, D.C. Dulles Intl

Sat 3/7

8:09 am-12:44 am

1 stop18h 35m

$251

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Sat 2/21

11:59 pm-8:09 am

1 stop30h 10m

Washington, D.C. Dulles Intl

Tue 2/24

6:20 pm-11:40 am

1 stop19h 20m

$253

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Thu 3/5

12:59 am-7:24 am

1 stop28h 25m

Washington, D.C. Dulles Intl

Wed 3/11

6:20 am-12:10 pm

1 stop8h 50m

$254

PhoenixWashington, D.C.

PHX - IAD

PHXIAD

Phoenix Sky Harbor Intl

Thu 2/19

5:05 am-5:57 pm

1 stop10h 52m

Washington, D.C. Dulles Intl

Mon 3/2

10:20 am-12:55 am

1 stop16h 35m

$255

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 $351.

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 $487. 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 $728.

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 $737 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 $396 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 $287 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?

You could potentially save up to 16% on your flight if you consider stops on a Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport flight.

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

As of February 2026, prices for Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport flights are approximately 17% cheaper 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

$209

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 $209. 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 $427.
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 $135Free CancellationRating
5.7
3,051 reviews
Search Frontier flights
DeltaPriceFrom $187Free CancellationRating
7.9
8,139 reviews
Search Delta flights
SouthwestPriceFrom $217Free CancellationRating
8.0
4,272 reviews
Search Southwest flights
United AirlinesPriceFrom $254Free CancellationRating
7.4
9,236 reviews
Search United Airlines flights

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

    Across 4 Southwest flights from Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport this week, the average price was $399, with the best Southwest deals starting from $217 round-trip. 4,272 users have rated Southwest on momondo, with an average score of 8.0/10.

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

    $254 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 $404, however, with flight time and availability significantly affecting the price. United Airlines (7.4/10 from 9,236 user reviews) flies into Washington, D.C. Dulles Intl Airport from Phoenix Sky Harbor Intl Airport 12 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
Waldorf
Woodbridge
Tysons
Laurel
Colonial Beach
Silver Spring
Towson
Fredericksburg
Gaithersburg
Rockville
Manassas
Springfield
Sterling
Fairfax
Linthicum Heights

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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