PHX - IAD

$144 Find Cheap Flights from Phoenix to Washington Dulles Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Phoenix to Dulles Intl departing on 5/19. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Washington, D.C. Dulles Intl Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Phoenix to Washington, D.C., as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Phoenix to Washington, D.C., as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$280
Typical prices: $564-$299
Frontier
Sat 5/16Sat 5/23
PHX - IAD • 1 stop
Cheapest non-stop
$337
Typical prices: $588-$364
United Airlines
Tue 5/19Tue 5/26
PHX - IAD • Non-stop
Advice from real travelers
AI-powered summary based on content written by travel experts. AI can make mistakes.
Southwest's two free checked bags suit luggage needs.
The Silver Line Metro links IAD to downtown in 50 mins.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Cheapest • from $280 (round-trip)
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Every day
You can fly direct with Southwest and United Airlines. Average duration is 4h 20m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Avoid delays
Most punctual • 92% on-time
Best time • Fewest delays
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $147 (round-trip)
Shortest trip • 6h 25m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 39% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 33% price drop
Most popular
Good to know
Good to know
+1
+1
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We hope you love your trip to Dulles Intl!
Flight Deals
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Expert advice
Flight Deals

Cheap Flights from Phoenix to Dulles Intl (PHX-IAD)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Phoenix to Dulles Intl that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Phoenix to Dulles Intl

Sat, May 16 - Sat, May 23
Frontier Logo
11:30 pm - 10:12 am
PHX
-
IAD
7h 42m
1 stop
Frontier Logo
11:07 am - 10:26 pm
IAD
-
PHX
14h 19m
1 stop
$280Frontier
Mon, May 11 - Thu, May 14
Frontier Logo
11:30 pm - 10:12 am
PHX
-
IAD
7h 42m
1 stop
Frontier Logo
12:36 pm - 6:35 pm
IAD
-
PHX
8h 59m
1 stop
$281Frontier
Wed, May 27 - Thu, Jun 4
Frontier Logo
10:27 pm - 8:12 am
PHX
-
IAD
6h 45m
1 stop
Frontier Logo
7:45 am - 6:35 pm
IAD
-
PHX
13h 50m
2 stops
$283Frontier
Fri, May 29 - Sat, Jun 6
Frontier Logo
6:51 pm - 10:12 am
PHX
-
IAD
12h 21m
2 stops
Frontier Logo
1:26 pm - 6:21 pm
IAD
-
PHX
7h 55m
1 stop
$284Frontier
Sun, May 24 - Thu, Jun 4
Frontier Logo
10:27 pm - 8:12 am
PHX
-
IAD
6h 45m
1 stop
Frontier Logo
7:45 am - 10:26 pm
IAD
-
PHX
17h 41m
1 stop
$285Frontier
Sat, May 16 - Mon, May 18
Frontier Logo
11:30 pm - 10:12 am
PHX
-
IAD
7h 42m
1 stop
Frontier Logo
7:27 pm - 3:23 pm
IAD
-
PHX
22h 56m
2 stops
$286Frontier
Tue, May 19 - Tue, May 26
Frontier Logo
11:30 pm - 10:12 am
PHX
-
IAD
7h 42m
1 stop
Frontier Logo
4:01 pm - 11:24 pm
IAD
-
PHX
34h 23m
2 stops
$287Frontier
Wed, May 20 - Thu, May 21
Frontier Logo
10:27 pm - 8:12 am
PHX
-
IAD
6h 45m
1 stop
Frontier Logo
9:12 am - 11:24 pm
IAD
-
PHX
17h 12m
1 stop
$289Frontier
Fri, Jul 3 - Mon, Jul 13
Frontier Logo
12:35 am - 12:28 pm
PHX
-
IAD
8h 53m
1 stop
Frontier Logo
11:17 am - 10:18 pm
IAD
-
PHX
14h 01m
1 stop
$290Frontier
Thu, May 14 - Wed, May 20
Frontier Logo
11:30 pm - 10:12 am
PHX
-
IAD
7h 42m
1 stop
Frontier Logo
11:12 am - 8:33 pm
IAD
-
PHX
12h 21m
1 stop
$291Frontier
Booking Insights

KAYAK's insights & trends for Phoenix to Dulles Intl flights

Get data-powered insights and trends into flights from Phoenix to Dulles Intl to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport departing in May.

What’s the cheapest day of the week to fly from Phoenix to Washington Dulles Airport?

The average price of all round-trip flights from Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport clicked on KAYAK for each day over the last 12 months.

If you are looking for a flight deal from Phoenix to Washington Dulles Airport, look for departures on Fridays and avoid leaving on a Sunday, as it's usually the priciest day. When flying back from Washington Dulles Airport, Saturday is the cheapest day to fly and Sunday is the most expensive.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport is January, where tickets cost $292 (return) on average. On the other hand, the most expensive months are February and March, where the average cost of round-trip tickets is $739 and $509 respectively.

Can I save money by flying with a layover from Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at $523 on average.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport, you should book around 4 weeks before departure, which saves you about 39% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 11 weeks before departure.

Expert advice

Expert advice for your flight from Phoenix to Dulles Intl

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on United Airlines and IAD

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Blane Bachelor

Blane Bachelor

Expert on Southwest

Blane Bachelor is a journalist and editor specializing in travel and aviation who writes regularly for top global outlets. Born and raised in Florida, Blane has worked and lived in four countries, including the Netherlands, where she’s currently based with her family. Her favorite way to get to know a new destination is by running or riding a bike around town – or hearing a spooky ghost story about local history. She will always choose the window seat.

Laura Ratliff

Laura Ratliff

Expert on PHX

Laura Ratliff is a New York-based writer and editor. She lives in downtown Brooklyn with her husband and their beloved dogs. Originally from Texas, she now considers New York City her home. She typically spends more than 200,000 miles on a plane each year and stays in plenty of hotels.

Good to know

Low seasonJanuary
Cheapest flight$144
Best time to beat the crowds with an average 33% drop in price.
Most popular time to fly with an average 2% increase in price.
Flight from Phoenix to Washington Dulles Airport

When to book flights from Phoenix to Dulles Intl

Are your dates flexible? Find out the best times to travel from Phoenix to Dulles Intl based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Phoenix to Washington Dulles Airport flights

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

    In the last 3 days, the lowest price for a flight from Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport was $144 for a one-way ticket and $280 for a round-trip.

  • Do I need a passport to fly between Phoenix and Washington Dulles Airport?

    A passport is not required to fly from Phoenix to Washington Dulles Airport.

  • Which airlines offer Wi-Fi service onboard planes from Phoenix to Washington Dulles Airport?

    All the following airlines offer inflight Wi-Fi service on the Phoenix to Washington Dulles Airport flight route: American Airlines, JetBlue, Hawaiian Airlines, Air Canada, Alaska Airlines, and Air France.

  • Which aircraft models fly most regularly from Phoenix to Washington Dulles Airport?

    The Boeing 737 MAX 9 is the aircraft model that flies most regularly on the Phoenix to Washington Dulles Airport flight route.

  • Which airline alliances offer flights from Phoenix to Washington Dulles Airport?

    SkyTeam, and Star Alliance are the airline alliances operating flights between Phoenix and Washington Dulles Airport, with SkyTeam being the most commonly used for this route.

  • On which days can I fly direct from Phoenix to Washington Dulles Airport?

    There are nonstop flights from Phoenix to Washington Dulles Airport on a daily basis.

  • Which is the best airline for flights from Phoenix to Washington, D.C., Southwest or Delta?

    The two airlines most popular with KAYAK users for flights from Phoenix to Washington, D.C. are Southwest and Delta. With an average price for the route of $485 and an overall rating of 8.0, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $337 and an overall rating of 7.9.

  • How does KAYAK find such low prices on flights from Phoenix to Washington Dulles Airport?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Phoenix to Washington Dulles Airport.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Phoenix to Washington Dulles Airport?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Washington Dulles Airport from Phoenix is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Phoenix to Washington Dulles Airport?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Washington Dulles Airport with an airline and back to Phoenix with another airline. Booking your flights between Phoenix and IAD can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Phoenix to Washington Dulles Airport?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Washington Dulles Airport from Phoenix up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport

  • Looking for a cheap flight? 25% of our users found flights on this route for $282 or less one-way and $526 or less round-trip.

Prefer to fly direct from Phoenix to Washington Dulles Airport?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Phoenix Sky Harbor Intl to Washington, D.C. Dulles Intl.
Find which airlines fly direct from Phoenix Sky Harbor Intl Airport to Washington, D.C. Dulles Intl Airport, which days they fly and book direct flights.

Direct departures

Phoenix Sky Harbor Intl to Washington, D.C. Dulles Intl

Monday

Southwest,United Airlines

Southwest,United Airlines

Tuesday

Southwest,United Airlines

Southwest,United Airlines

Wednesday

Southwest,United Airlines

Southwest,United Airlines

Thursday

Southwest,United Airlines

Southwest,United Airlines

Friday

Southwest,United Airlines

Southwest,United Airlines

Saturday

Southwest,United Airlines

Southwest,United Airlines

Sunday

Southwest,United Airlines

Southwest,United Airlines

See more direct flights

Direct returns

Washington, D.C. Dulles Intl to Phoenix Sky Harbor Intl

Monday

Southwest,United Airlines

Southwest,United Airlines

Tuesday

Southwest,United Airlines

Southwest,United Airlines

Wednesday

Southwest,United Airlines

Southwest,United Airlines

Thursday

Southwest,United Airlines

Southwest,United Airlines

Friday

Southwest,United Airlines

Southwest,United Airlines

Saturday

Southwest,United Airlines

Southwest,United Airlines

Sunday

Southwest,United Airlines

Southwest,United Airlines

See more direct flights

Reviews of the top 4 airlines serving from Phoenix to Dulles Intl

 
See real verified KAYAK customer reviews for airlines flying from Phoenix to Washington, D.C.. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Phoenix to Dulles Intl? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4314 reviews
8.6Crew
8.0Comfort
8.1Boarding
7.0Food
7.5Entertainment
Airline reviews

The entire experience from boarding to landing was amazing! The crew were very friendly. Will definitely be back.

10.0 Excellentlarry, Apr 2026
LGB - PHX
Read more Southwest reviews

The entire experience from boarding to landing was amazing! The crew were very friendly. Will definitely be back.

no service at all due to turbulence. they should've at least given us snacks, there were only 10 people on the entire flight.

First time I've had to use the disabled accommodations. And I could not have had a better experience with Southwest, i was having trouble getting from one terminal to another due to my heart failure. And the next thing I know a Southwest agent had made sure. I had a wheelchair at all my flights. Can't thank them enough.

Delayed flight, lack of information, boarding process is a mess as is the carryon luggage causing issues when leaving the plane….just a poor experience.

Comfortable. Easy. No problems. Just wish they had gf options for snacks.

The crew was very kind and made going to Hawaii relaxing and fun to look forward to! Thank you Southwest for a pleasant flight!

This leg was much better, but we did have to have a 3 hour lay o er after coming from a very exhausting hiccup with our flight from BNA to Den

We waited in the airplane for over 45 min for a southwest employee to make the flight. This cause over half the plane to miss their connecting flight in Denver. When we confronted the desk upon arrival, they told us the only flight they had was the next day leaving at 8:50 pm!!! Or they offered to get us to Burbank or LA, but after that we were on our own to get back to Santa Barbara. I paid for a flight from sba to bna bna to sba. My re entry into mom mode has been 💯 rough because of southwest mistake with my flight. And now I’m leaving to Reno tomorrow for a vballl tournament and just discovered that my leg in Vegas has me and my 3 kids on a stand by flight even though I had booked these ticket last year November!! Do better southwest!

Southwest is kind of a slum airline. It’s gotten more expensive over the years for less and less service. I am a Southwest Chase Visa card holder and was forced to choose a seat in the 26th row in the middle seat. However my wife who is a rewards member but doesn’t hold a card or anything else, gets randomly assigned a normally paid seat in row 6! How does that work?

For the first time in a long time, the Wi-Fi actually worked the entire flight! The flight crew was amazing as usual.

The agent at check in and at the gate were less than thrilled to be at work. I'm not a fan of Kayak's placement on the plane. I got put in the middle seat and none of my preferences were used.

In ATL they have two sets of departure screens. Follow what is on your airline's departure board - the ATL Airport Authority departure board had completely incorrect details about the gate assignment for my flight, which would have made me miss boarding.

Flight was delayed it was hot while sitting on the plane, one engine was working on the plane until they had to do some jimmy rigging down the runway in order for the other engine to charge up. It was ridiculous

The flight was very good and the staff was very friendly and helpful!

The only thing I would say is we tried to get on a standby earlier flight, but with our fair we couldn’t. That seems senseless to leave with open seats..

Very easy to use and convenient, you can perform any action within the same portal

In a world of delays, Delta was on time both ways! Boarding was fast and efficient. Staff was friendly. AND wifi worked.

WiFi didn’t work. Flight delayed 3 hours Crew members were illiterate Seat lean back did not work.

Flight was delayed, we could have been notified earlier and in a consistent manner. App was not refreshing for another passenger to get the latest flight status. We could have stayed and waited at the hotel instead of waiting at the airport had we known the flight was going to delayed for more than 5 hours. The toilet is too tight, and needs to be cleaned more frequently (every hour). The entertainment screen froze, the touch screen not responding to touch. We were upgraded to comfort, it is more comfortable than regular economy seats.

This wasn't my experience with Delta. It was just the Pegasus flight. Seats were very hard. Staff was kinda rough. Not very nice. Charged me for snacks. For a 4 hour flight I would've expected more.

Was great in general, try to respect time and excuses when slight changes have been made, appreciated!

Terrific in every way. On time, professional staff, multiple movie options to select, great food and drink.

My bags were misplaced!!! Im in a foreign country with no bags

I liked that it was on time, however, the food was not good.

Offered to check carry on to final destination. This is the most absurd thing in the world. I'm carrying on because I need what is in the carry-on. I'm okay with picking up at next stop but then I will be on much larger plane that can accommodate it. Also, if there is ever a change to your flight. Go to the airport and have the people there fix your ticket. Don't do it over the phone or online with United they screwed us up and ended up with flights for our last leg that took off before our first leg.

United is one airline which regardless of how many separate United tickets in existence, if one flight breaks down, the airline will take care of all the flights.

It was okay, the food was good, but after the landing there was not enough time for luggage and security to catch a connection. It was crowded on board.

When I went to check in at the United counter in Barcelona, Spain I had 2 different menat 2 different times in United uniforms (standing around with a couple other employees) ask me if I was traveling alone. The one man asked me 3 different ways if I was traveling alone. I am, 68 yeaers old and have all my faculties. I thought it was weird and it made me feel very uncomfortable. What difference does it make if I was traveling alone or with someone? What if I was a recent widow? That would have been horrible. They never gave me a reason why they needed to know who I was traveling with. I was hesitant to question them because I needed to be on that flight.

Crew was great. 2 1/2 hour delay was due to staff needing "rest" was avoidable and self inflicted as United not willing to hire enough crew to keep flight on time.. Ridiculous. The crew and the passengers both suffered due to this.

Fine not above and beyond as I had a connection that was delayed due to maintenance

Plane was hot and miserable and the crew was rude!

12 hour delay required getting on and off plane 3 times - would have at least liked to have been offered a snack or drink

They didn’t offer a water, even after I asked

They switched our terminal 3 times and we were delayed for four plus hours!!!

It was an early flight and most people napped/slept and the crew let us which was nice.

The crew acted like they had never done this and kept barking passive aggressive orders at people. + the security line + the delay + sitting on the tarmac for 2 hours + none of the apps or signage updating with correct times

More inflight connection. And leg space is horrible. And the paying for baggage I'd ridiculous!!!

My flight was originally from SAT to MCO connecting from MCO to ORD. We got diverted to ATL and than Frontier staff there was sooo un helpful first they said they couldn’t give us any accommodation since our flight first got delayed that cancelled and now it’s 221am and I am still in ATL since they said they need to create a new flight my final destination is ORD and I have been delayed twice and cancelled. With no real help the frontier app didn’t work no email updates over all such a horrible experience

There's no seats that lean back with little leg space i wad uncomfortable the entire flight. Your charges for extra baggage is despicable and costly!!

Remind customers of the need to have passport or new ID for boarding.

Everything you need to know for your flight from Phoenix to Dulles Intl

Information on your arrival and departure airports