Cheap Flights from Phoenix Sky Harbor to Washington Dulles

Compare Phoenix Sky Harbor to Washington Dulles flight deals

Find the cheapest month or even day of the year to fly to Washington Dulles

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Flight deals from Phoenix Sky Harbor to Washington Dulles

Looking for a cheap last-minute deal or the best return flight from Phoenix Sky Harbor to Washington Dulles? Find the lowest prices on one-way and return tickets right here.

Washington D.C..$317 per passenger.Departing Thu, 19 Feb, returning Mon, 23 Feb.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Phoenix Sky Harbor on Thu, 19 Feb, arriving in Washington Dulles.Inbound indirect flight with Frontier Airlines, departs from Washington Dulles on Mon, 23 Feb, arriving in Phoenix Sky Harbor.Price includes taxes and charges.From $317, select.

Washington D.C..$317 per passenger.Departing Wed, 13 May, returning Mon, 18 May.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Phoenix Sky Harbor on Wed, 13 May, arriving in Washington Dulles.Inbound indirect flight with Frontier Airlines, departs from Washington Dulles on Mon, 18 May, arriving in Phoenix Sky Harbor.Price includes taxes and charges.From $317, select.

Washington D.C..$317 per passenger.Departing Wed, 15 Apr, returning Mon, 20 Apr.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Phoenix Sky Harbor on Wed, 15 Apr, arriving in Washington Dulles.Inbound indirect flight with Frontier Airlines, departs from Washington Dulles on Mon, 20 Apr, arriving in Phoenix Sky Harbor.Price includes taxes and charges.From $317, select.

Washington D.C..$347 per passenger.Departing Thu, 5 Mar, returning Wed, 11 Mar.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Phoenix Sky Harbor on Thu, 5 Mar, arriving in Washington Dulles.Inbound indirect flight with Frontier Airlines, departs from Washington Dulles on Wed, 11 Mar, arriving in Phoenix Sky Harbor.Price includes taxes and charges.From $347, select.

Washington D.C..$375 per passenger.Departing Wed, 29 Apr, returning Fri, 1 May.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Phoenix Sky Harbor on Wed, 29 Apr, arriving in Washington Dulles.Inbound indirect flight with Frontier Airlines, departs from Washington Dulles on Fri, 1 May, arriving in Phoenix Sky Harbor.Price includes taxes and charges.From $375, select.

Washington D.C..$449 per passenger.Departing Thu, 26 Feb, returning Sun, 1 Mar.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Phoenix Sky Harbor on Thu, 26 Feb, arriving in Washington Dulles.Inbound indirect flight with Frontier Airlines, departs from Washington Dulles on Sun, 1 Mar, arriving in Phoenix Sky Harbor.Price includes taxes and charges.From $449, select.

Washington D.C..$498 per passenger.Departing Sat, 4 Jul, returning Sat, 11 Jul.Return flight with Delta.Outbound indirect flight with Delta, departs from Phoenix Sky Harbor on Sat, 4 Jul, arriving in Washington Dulles.Inbound indirect flight with Delta, departs from Washington Dulles on Sat, 11 Jul, arriving in Phoenix Sky Harbor.Price includes taxes and charges.From $498, select.

Washington D.C..$592 per passenger.Departing Tue, 31 Mar, returning Sun, 5 Apr.Return flight with Delta.Outbound indirect flight with Delta, departs from Phoenix Sky Harbor on Tue, 31 Mar, arriving in Washington Dulles.Inbound indirect flight with Delta, departs from Washington Dulles on Sun, 5 Apr, arriving in Phoenix Sky Harbor.Price includes taxes and charges.From $592, select.

Find the cheapest month to fly from Phoenix Sky Harbor to Washington Dulles

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Phoenix Sky Harbor to Washington Dulles flights are currently cheapest in February.

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Direct flights from Phoenix Sky Harbor to Washington Dulles

Phoenix Sky Harbor to Washington Dulles: Alternative routes

Compare routes from Phoenix Sky Harbor to Washington D.C. below. You may find an airport to fly into that's cheaper, faster, or easier than Washington Dulles.

Phoenix to Washington D.C.: Flight information

The things to know before you go.

Cheapest flight found	$317
Cheapest month to fly	May
Average flight time	4 hrs, 17 mins
Most popular airline	Southwest Airlines
Average flights per week	57

Finding cheap flights from Phoenix Sky Harbor to Washington Dulles: Frequently asked questions

How much are return flights from Phoenix Sky Harbor to Washington Dulles?

The best price we found for a return flight from Phoenix Sky Harbor to Washington Dulles is $317. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.

How long does it take to fly from Phoenix Sky Harbor to Washington Dulles?

4 hours and 17 minutes is the average flight time from Phoenix Sky Harbor to Washington Dulles.

Which airlines fly direct from Phoenix Sky Harbor to Washington Dulles?

Southwest Airlines, United and Lufthansa fly direct from Phoenix Sky Harbor to Washington Dulles.

How many flights are there a week from Phoenix Sky Harbor to Washington Dulles?

As of February 2026, there are 57 flights per week flying from Phoenix Sky Harbor to Washington Dulles.

When is the cheapest time to fly from Phoenix Sky Harbor to Washington Dulles?

The cheapest month to fly from Phoenix Sky Harbor to Washington Dulles is usually May.

Which upcoming date is cheapest to fly from Phoenix Sky Harbor Airport to Washington Dulles Airport on?

After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Phoenix Sky Harbor Airport to Washington Dulles Airport on Wednesday, 13 May 2026.

Can I get a direct flight from Phoenix Sky Harbor Airport to Washington Dulles Airport?

Yes – the average flight time is 4 hours and 17 minutes.

How can I find the best flight deal to Washington Dulles?

We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Washington Dulles but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

When is the best time to book flights to Washington D.C.?

We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Washington D.C. is around 40 days in advance, so don’t leave your flight to the last minute.

Which is the cheapest airline to fly from Phoenix Sky Harbor Airport to Washington Dulles with?

Currently, Frontier Airlines and United offer the cheapest flight tickets to Washington Dulles.

Travelling from Phoenix Sky Harbour International Airport (PHX) to Washington Dulles International Airport (IAD): what you need to know

Hop on a direct flight from Phoenix Sky Harbour International Airport to Washington Dulles International Airport and you'll be in the air for an average of 4 hours 15 minutes.
The timezone in Washington DC is UTC-4, which is three hours ahead of Phoenix.
Take your pick of 25 weekly Phoenix Sky Harbour International Airport to Washington Dulles International Airport flights. The 00:13 departure with United Airlines is the earliest you can take. United Airlines operates the latest service of the day at 23:59.
For a stress-free journey, turn up at the airport two hours ahead of international flights and one hour before domestic departures. This way, you'll have plenty of time to catch your PHX to IAD flight.
Travelling during a peak time like July? School holidays and other popular periods can result in longer lines and delays at check-in and security. Be extra cautious and get there up to four hours ahead of international flights and two hours before a domestic departure.
United Airlines has direct flights from Phoenix Sky Harbour International Airport to Washington Dulles International Airport. Book with this popular airline, then get ready to check out the sights in Washington DC — and maybe even more of United States if your schedule allows.
The majority of passengers choose to fly with United Airlines on this route.
United Airlines stands out as the most punctual carrier for PHX to IAD flights, with 89.76% of services landing as scheduled.
If you'd like to explore another city along the way, just deselect 'Direct flights only' when searching for your ticket from Phoenix Sky Harbour International Airport to Washington Dulles International Airport. Here are the most popular stopovers between PHX and IAD:
- Denver International Airport
- John Glenn Columbus International Airport
- Detroit Metropolitan Wayne County Airport

How to find the cheapest flights from Phoenix Sky Harbour International Airport (PHX) to Washington Dulles International Airport (IAD)

The cheapest price we've found for a one-way Phoenix Sky Harbour International Airport to Washington Dulles International Airport flight is $167. A round-trip fare right now is $317. Depending on the availability when you book, these fares may change.
Score cheap tickets from PHX to IAD by booking six months ahead. According to our research, that's the sweet spot for finding the biggest deals.
May is the cheapest month for flights from Phoenix Sky Harbour International Airport to Washington Dulles International Airport. If you want to travel during a different time of year, the 'Whole month' tool will show you the lowest airfares across every month.
There's no need to check every day to see if fares have gone down when you create a Price Alert. We'll let you know the moment the price changes on cheap flights from PHX to IAD.
Find the perfect flight for you with the help of the filters. To see the 'Cheapest,' 'Fastest' or 'Best' flights from Phoenix Sky Harbour International Airport to Washington Dulles International Airport, use the 'Sort by' tool. You can also filter by airline, departure and arrival times, and journey duration.

Handy information about Phoenix Sky Harbour International Airport (PHX)

The address for PHX is 3400 Sky Harbour Boulevard.
Phoenix Sky Harbour International Airport maintains a strong on-time record, so you're unlikely to face delays. Departures from PHX land on schedule 82.57% of the time.
Central Phoenix to Phoenix Sky Harbour International Airport is approximately 8 kilometres. Depending on traffic, it'll take you about 10 minutes to get there if you're driving, catching a cab or ride-sharing.
Catching public transport? You can expect a journey time of around 35 minutes.
Taking an early flight from Phoenix Sky Harbour International Airport to Washington Dulles International Airport? Avoid rushing to the airport (and sneak in some extra precious sleep) by choosing one of these stays near PHX:

Arriving at Washington Dulles International Airport (IAD)

The last thing you want is a lengthy journey to your hotel if you're landing late on a Phoenix Sky Harbour International Airport to Washington Dulles International Airport flight. Reserve one of these accommodation options near IAD instead:
Grab a Washington Dulles International Airport rental car and discover Washington DC and beyond with your own wheels. Dollar, Thrifty and Sixt are popular outlets to choose from here.
For the lowest price, book your ride from Washington Dulles International Airport around one week before travelling.

Getting from Washington Dulles International Airport (IAD) to central Washington DC

IAD is located at 1 Saarinen Circle.
From Washington Dulles International Airport, Washington DC is approximately 56 kilometres away. It takes around 50 minutes to drive to the centre.
It'll take around 3 hours 25 minutes when travelling by public transport.

When to fly to Washington Dulles International Airport (IAD)

April is the most popular month for flights from Phoenix Sky Harbour International Airport to Washington Dulles International Airport. To steer clear of the crowds, head to Washington DC in January.
Before locking in your flight from Phoenix Sky Harbour International Airport to Washington Dulles International Airport, consider the kind of weather you like. July is the warmest month in Washington DC, with temperatures ranging from 19ºC to 33ºC.
Search for cheap tickets from PHX to IAD in January if you want to travel in cooler conditions. Temperatures are at their lowest around then, ranging between -6ºC and 10ºC on average.

Explore more of United States

You've visited Washington DC, now it's time to discover other corners of United States. Journey about 322 kilometres north-east to New York to check off its popular sights. From Statue of Liberty to Central Park and Empire State Building, there's plenty to keep you on the go.
Philadelphia is another well-known destination in United States and is around 193 kilometres north-east of Washington DC. No trip is complete without dropping by Liberty Bell, Independence Hall and Philadelphia Museum of Art.