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$145 Cheap Flights from Phoenix (PHX) to Washington (IAD)

View $145 flight on Tue, Aug 18, 2026Opens in a new window

Popular airlines from Phoenix Sky Harbor Intl. Airport (PHX) to Washington Dulles Intl. Airport (IAD)

Cheap Flights from Phoenix to Washington (PHX-IAD)

Prices were available within the past 7 days and start at $145 for one-way flights and $283 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Thu, Sep 24 - Tue, Sep 29
PHX
Phoenix
IAD
Washington
$283 Roundtrip, found 23 hours ago
$283
Roundtrip
found 23 hours ago
Select United flight, departing Thu, Sep 24 from Phoenix to Washington, returning Tue, Sep 29, priced at $283 found 23 hours ago
United
Thu, Nov 12 - Mon, Nov 16
PHX
Phoenix
IAD
Washington
$285 Roundtrip, found 1 day ago
$285
Roundtrip
found 1 day ago
Select United flight, departing Thu, Nov 12 from Phoenix to Washington, returning Mon, Nov 16, priced at $285 found 1 day ago
United
Tue, Aug 11 - Thu, Aug 13
PHX
Phoenix
IAD
Washington
$289 Roundtrip, found 22 hours ago
$289
Roundtrip
found 22 hours ago
Select United flight, departing Tue, Aug 11 from Phoenix to Washington, returning Thu, Aug 13, priced at $289 found 22 hours ago
Frontier Airlines
Tue, Sep 1 - Tue, Sep 8
PHX
Phoenix
IAD
Washington
$290 Roundtrip, found 11 hours ago
$290
Roundtrip
found 11 hours ago
Select Frontier Airlines flight, departing Tue, Sep 1 from Phoenix to Washington, returning Tue, Sep 8, priced at $290 found 11 hours ago
United
Tue, Aug 11 - Thu, Aug 13
PHX
Phoenix
IAD
Washington
$294 Roundtrip, found 22 hours ago
$294
Roundtrip
found 22 hours ago
Select United flight, departing Tue, Aug 11 from Phoenix to Washington, returning Thu, Aug 13, priced at $294 found 22 hours ago
United
Fri, Aug 28 - Tue, Sep 1
PHX
Phoenix
IAD
Washington
$295 Roundtrip, found 21 hours ago
$295
Roundtrip
found 21 hours ago
Select United flight, departing Fri, Aug 28 from Phoenix to Washington, returning Tue, Sep 1, priced at $295 found 21 hours ago
Delta
Tue, Aug 11 - Thu, Aug 13
PHX
Phoenix
IAD
Washington
$299 Roundtrip, found 22 hours ago
$299
Roundtrip
found 22 hours ago
Select Delta flight, departing Tue, Aug 11 from Phoenix to Washington, returning Thu, Aug 13, priced at $299 found 22 hours ago
Alaska Airlines
Tue, Sep 1 - Tue, Sep 8
PHX
Phoenix
IAD
Washington
$300 Roundtrip, found 11 hours ago
$300
Roundtrip
found 11 hours ago
Select Alaska Airlines flight, departing Tue, Sep 1 from Phoenix to Washington, returning Tue, Sep 8, priced at $300 found 11 hours ago
Delta
Wed, Oct 7 - Wed, Oct 14
PHX
Phoenix
IAD
Washington
$300 Roundtrip, found 1 day ago
$300
Roundtrip
found 1 day ago
Select Delta flight, departing Wed, Oct 7 from Phoenix to Washington, returning Wed, Oct 14, priced at $300 found 1 day ago
American Airlines
Tue, Aug 18 - Mon, Aug 24
PHX
Phoenix
IAD
Washington
$379 Roundtrip, found 1 day ago
$379
Roundtrip
found 1 day ago
Select American Airlines flight, departing Tue, Aug 18 from Phoenix to Washington, returning Mon, Aug 24, priced at $379 found 1 day ago

Alternative airports near Washington

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Ronald Reagan Washington National DCA. Cheapest and Closest option available. Average driving time to city center is 8 minutes. Flights from $280
DCA
Ronald Reagan Washington National
CheapestClosest
Average driving time to city center8 min
Flights from $280

What you need to know for your flight from Sky Harbor Intl. to Washington Dulles Intl.

Phoenix (PHX) to Washington (IAD) at a glance

Embark on your journey from Phoenix (PHX) to Washington (IAD) with a selection of airlines that serve this domestic short-haul route. Evaluate your choices between full-service and budget carriers to discover flight options that align with your travel plans, preferences, and budget. Dive into the vibrant sights and neighborhoods of Washington as you review the essential details for flights from Sky Harbor International Airport to Washington Dulles International Airport.

  • Fastest flight duration: around 4h 15m non-stop
  • Route distance: roughly 2,000 miles (3,220 km)
  • Flights per week: around 20+ flights with multiple daily departures on average
  • Typical fares (one-way): economy tickets often range from $105–$450, depending on seasonality and how far ahead you book

Flights from Sky Harbor International Airport (PHX) to Washington Dulles International Airport (IAD)

Based on recent traveler bookings, here’s a look at the most popular airlines flying from Phoenix to Washington, featuring both non-stop and one-stop options. Common layover points include Hartsfield-Jackson Atlanta International Airport (ATL) with a layover of about 2 hours, Denver International Airport (DEN) at around 1 hour 45 minutes, and Harry Reid International Airport (LAS) with approximately 2 hours 30 minutes. This variety allows you to tailor your travel plans by balancing cost, total journey time, and cabin class for the ideal itinerary.

  • United: This comprehensive airline provides both non-stop and one-stop flights, with one-way ticket prices generally falling between $120 and $535. United represents around 56% of the departures on this route, with a standard non-stop flight duration of 4 hours and 15 minutes.
  • Southwest Airlines: As a budget-friendly option, Southwest offers both non-stop and one-stop travel, with one-way fares typically ranging from $105 to $465. It accounts for roughly 22% of the flights on this route, with a typical non-stop trip taking about 4 hours and 15 minutes.
  • Frontier Airlines: This low-cost airline provides one-stop services, with one-way fares that usually range from $105 to $235. Frontier makes up about 8% of the departures on this route, featuring an in-flight duration of 5 hours and 30 minutes, and a total travel time of approximately 7 hours and 15 minutes, including layover time.
  • Delta: Delta is a full-service airline that offers one-stop flights, with one-way fares typically priced between $130 and $445. It comprises around 8% of the departures on this route, featuring an in-flight time of 5 hours and 30 minutes, and a total journey time of about 7 hours and 15 minutes, factoring in layovers.
  • American Airlines: This full-service carrier provides one-stop services, with one-way fares ranging from $185 to $615. American Airlines accounts for approximately 4% of the departures on this route, with an in-flight duration of 5 hours and 30 minutes and a total travel time nearing 7 hours and 15 minutes, including the layover.

Travelers flying from Phoenix to Washington can opt to enhance their experience by upgrading their flight. Leading airlines in this route include United and Delta, both offering first class and premium economy service, while American Airlines features first class service exclusively.

Best time to fly from Phoenix (PHX) to Washington (IAD)

The most popular months for travelers flying from Phoenix to Washington are January, March, and April, when peak temperatures in Washington reach up to 55°F in April. If you prefer quieter travel, consider July, the least busy time to visit with temperatures around 78.4°F and typically the lowest average one-way fare (around $220). Flight availability peaks in May, with approximately 30 flights per week, making it easier to find convenient departure times. January and February have the fewest flights, with approximately 20 flights per week.

  • Cheapest time to fly: July usually offers good deals with average one-way fare around $220, roughly 13% cheaper than the yearly average.
  • More budget-friendly months to fly: June, August, and September typically offer average one-way fares of around $229.
  • Most flight options: May has the highest number of flights from Phoenix to Washington, with approximately 30 flights per week, giving you more flexibility in scheduling your trip.
calendar iconMonthtemperature iconTemperaturecrowd level iconDemandflights iconWeekly Flightsprice iconAverage one-way Fare
January33.6°F (0.9°C)Moderately High20$273
February36.9°F (2.7°C)Average20$288
March44.4°F (6.9°C)Moderately High25$285
April55.0°F (12.8°C)Moderately High25$288
May64.6°F (18.1°C)Average30$239
June73.2°F (22.9°C)Average28$226
July78.4°F (25.8°C)Moderately Low24$220
August76.3°F (24.6°C)Moderately Low21$229
September69.6°F (20.9°C)Moderately Low23$232
October58.5°F (14.7°C)Average28$234
November46.2°F (7.9°C)Average26$262
December39.2°F (4.0°C)Average23$256

*Average one-way fare is based on Expedia flight booking data from January 2025 to April 2026 for the specified route and travel class and may change depending on availability, dates, and demand.

Alternative route from Phoenix (PHX) to Washington (IAD)

  • Phoenix to Washington (PHX-DCA): Ronald Reagan Washington National Airport (DCA) is located approximately 23 miles from Washington Dulles International Airport (IAD). One-way economy ticket prices on this route generally fall between $100 and $450, influenced by the season and how far in advance you book. Travelers can choose from both non-stop and one-stop flight options. Major airlines servicing this route include American Airlines and the budget-friendly Frontier Airlines. Additionally, first-class service is offered for this journey.

How to find the best prices for flights from Phoenix (PHX) to Washington (IAD)

Getting some of the best deals on flights from Phoenix to Washington is all about timing and flexibility. Here are some key tips to help you save:

  1. Best times to book and fly: cheaper fares are usually available when booking at least two months in advance, although most travelers tend to book between two to eight weeks ahead. Morning departures (5 a.m. to 12 p.m.) are typically less expensive and are the most popular flight times, while flying on Wednesday often results in lower prices, despite Sunday being the busiest travel day.
  2. Set up price alerts: stay updated on price changes by using Expedia's Price Tracker. Receive alerts when fares drop for your selected route.
  3. Bundle and save: bundle your flight and hotel to save on Expedia, or unlock a hotel deal after booking your flight.*
  4. Compare flight options: use Expedia's search tool to compare airlines, routes, direct vs. non-direct flights, and flight times. You can also sort by price to find the most affordable options.
  5. Stay flexible with dates: being open to different travel days can sometimes help you find better prices on flights and hotels.
  6. Think about luggage: nowadays, it's important to check the airline's baggage policies to find the best value. That may be paying for an additional carry-on bag or booking a ticket with checked luggage included. Either way, double-check your allowance before confirming your booking to avoid excess baggage fees at the airport.

*Members only. Savings vary and are not available on all bundles. Select hotels.

Arriving at Washington Dulles International Airport from Sky Harbor International Airport

Washington welcomes travelers from Phoenix with a range of transport options based on price, convenience, and proximity. Washington city center is approximately a 40-minute drive (covering about 29 miles) from Washington Dulles International Airport, depending on traffic. Here's how to reach Washington efficiently:

  • Hotel transfer: Transfers offer a convenient way to reach your hotel in Washington, with private rides that can be arranged in advance.
  • Car rental: Renting a car from Washington Dulles International Airport is a great option if you plan to explore and sightsee beyond the city. Browse cheap car rentals at Washington Dulles International Airport on Expedia.
  • Taxi/ride-hailing: Taxis and ride-hailing services may be available from designated pickup areas outside the terminal, check locally on arrival.
  • Public transportation: From Washington Dulles International Airport, the Washington Dulles International Airport Metrorail Station, a metro station, is located about 0.2 miles away on foot, providing easy access for travelers.

Frequently asked questions

How much does a flight from Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.) cost?
You can find cheap one-way flights from $145 and cheap return flights from $283 Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.) with Expedia. One-way flights generally range between $196 and $1209, and roundtrip flights usually range from $373 to $2421. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
The cheapest month to fly from PHX to IAD is September when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you're able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
United offers around 17 weekly direct flights from PHX to IAD.
What is the cheapest airline that flies from Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
United is one of the cheapest airlines offering nonstop flights from Phoenix (PHX) to Washington, DC (IAD), with round-trip tickets starting from around $550. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
To find a cheap flight from Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
The best airline to fly with from Phoenix, AZ (PHX) to Washington, DC (IAD) will differ from traveler to traveler. If you like to fly early, United offers early morning flights. If price is the most important factor, United typically offers the lowest fares. United offers the most daily flights from Phoenix to Washington, DC, which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
There are approximately 3 nonstop flights per day from Sky Harbor Intl. (PHX) to Washington Dulles Intl. (IAD). For more options, look at flights that include layovers.
What is the earliest flight from Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
The earliest flight from Sky Harbor International Airport (PHX) to Washington Dulles International Airport (IAD) typically departs at 12:15 AM, operated by American Airlines. This seasonal service is available in October, allowing you to maximize your time in the nation's capital. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
The most popular departure times for flights from Sky Harbor Intl. (PHX) to Washington Dulles Intl. (IAD) are in the early morning, from 6am to 9am. About 31% of passengers prefer this time window. Many major carriers, including United Airlines and American Airlines, offer flights during this window. This timing is favored because it allows travelers to arrive in Washington, DC with plenty of time to start their day.
How long does it take to fly from Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
A nonstop flight from PHX to IAD typically takes around 4 hours 20 minutes, covering approximately 1,953 miles. Connecting flights on this route usually add 4 hours 10 minutes to your travel time. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
You can fly first class between PHX and IAD. First class cabins are available on:

  • United Airlines
  • American Airlines
  • Delta Air Lines

How much is a business class flight from Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
A direct, return business class ticket from Phoenix (PHX) to Washington, DC (IAD) typically costs between $1,731 - $2,356. A non-stop, one-way business class flight is usually around $772 - $819. Prices often fluctuate based on seasonality and how early you book. You may also be able to find a cheaper business class journey between Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.) if you opt for a connecting flight.*Prices based on flights available on Expedia in the last year.
How do I earn miles on a Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.) flight with Expedia?
It's easy to earn miles on a Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Washington from Sky Harbor Intl. (PHX)?
When traveling from Sky Harbor Intl. (PHX) to Washington, you can fly into Washington Dulles Intl. (IAD) and Ronald Reagan Washington National (DCA). Some flights may connect through major hubs like Portland Intl. (PDX), San Diego Intl. (SAN), BOI (BOI) before reaching Washington. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.) at the last minute?
Typically, booking a last minute flight from Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.) flight and hotel package?
Securing a Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.) Fairfax County Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
If you booked your Phoenix, AZ (PHX-Sky Harbor Intl.) to Washington, DC (IAD-Washington Dulles Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Sky Harbor Intl.
Destination airport
Washington Dulles Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Sun Country Airlines, United
Roundtrip price
$282
Distance
1952 mi
Average flight time
10 hours 9 mins

Book with confidence

Phoenix to Washington Flights

The cheapest times to fly from Phoenix to Washington

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Phoenix to Washington are during the month of September. You can find some of the cheapest flights from Phoenix to Washington with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Phoenix to Washington

Sunday is one of the best days to book for cheap flights from Phoenix to Washington: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Phoenix to Washington

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Phoenix to Washington in 2026. You can also book with separate airlines for your outbound and return journeys, from $145 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Phoenix to Washington flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Phoenix to Washington airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Phoenix to Washington Flights

*Flight schedules are subject to change.

*Available to One Key members.

 

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