$119 Cheap Flights from Portland (PWM) to Washington (IAD)

View $119 flight on Wed, Oct 22, 2025Opens in a new window

Popular airlines from Portland Intl. Jetport Airport (PWM) to Washington Dulles Intl. Airport (IAD)

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Cheap Flights from Portland to Washington (PWM-IAD)

Prices were available within the past 7 days and start at $119 for one-way flights and $175 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Tue, Oct 21 - Wed, Oct 22
PWM
Portland
IAD
Washington
$175 Roundtrip, found 5 days ago
$175
Roundtrip
found 5 days ago
Select United flight, departing Tue, Oct 21 from Portland to Washington, returning Wed, Oct 22, priced at $175 found 5 days ago
Delta
Sat, Nov 8 - Wed, Nov 12
PWM
Portland
IAD
Washington
$181 Roundtrip, found 6 days ago
$181
Roundtrip
found 6 days ago
Select Delta flight, departing Sat, Nov 8 from Portland to Washington, returning Wed, Nov 12, priced at $181 found 6 days ago
United
Tue, Oct 21 - Wed, Oct 22
PWM
Portland
IAD
Washington
$185 Roundtrip, found 5 days ago
$185
Roundtrip
found 5 days ago
Select United flight, departing Tue, Oct 21 from Portland to Washington, returning Wed, Oct 22, priced at $185 found 5 days ago
United
Fri, Oct 17 - Sun, Oct 19
PWM
Portland
IAD
Washington
$189 Roundtrip, just found
$189
Roundtrip
just found
Select United flight, departing Fri, Oct 17 from Portland to Washington, returning Sun, Oct 19, priced at $189 just found
United
Fri, Oct 24 - Mon, Oct 27
PWM
Portland
IAD
Washington
$194 Roundtrip, found 1 hour ago
$194
Roundtrip
found 1 hour ago
Select United flight, departing Fri, Oct 24 from Portland to Washington, returning Mon, Oct 27, priced at $194 found 1 hour ago
United
Fri, Oct 17 - Sun, Oct 19
PWM
Portland
IAD
Washington
$199 Roundtrip, just found
$199
Roundtrip
just found
Select United flight, departing Fri, Oct 17 from Portland to Washington, returning Sun, Oct 19, priced at $199 just found
United
Thu, Oct 9 - Fri, Oct 17
PWM
Portland
IAD
Washington
$203 Roundtrip, found 3 days ago
$203
Roundtrip
found 3 days ago
Select United flight, departing Thu, Oct 9 from Portland to Washington, returning Fri, Oct 17, priced at $203 found 3 days ago
United
Sat, Nov 15 - Mon, Nov 17
PWM
Portland
IAD
Washington
$204 Roundtrip, found 4 hours ago
$204
Roundtrip
found 4 hours ago
Select United flight, departing Sat, Nov 15 from Portland to Washington, returning Mon, Nov 17, priced at $204 found 4 hours ago
United
Fri, Oct 17 - Sun, Oct 19
PWM
Portland
IAD
Washington
$208 Roundtrip, just found
$208
Roundtrip
just found
Select United flight, departing Fri, Oct 17 from Portland to Washington, returning Sun, Oct 19, priced at $208 just found
American Airlines
Mon, Oct 27 - Wed, Oct 29
PWM
Portland
IAD
Washington
$251 Roundtrip, found 5 days ago
$251
Roundtrip
found 5 days ago
Select American Airlines flight, departing Mon, Oct 27 from Portland to Washington, returning Wed, Oct 29, priced at $251 found 5 days ago

Find the cheapest month to fly from Portland (PWM) to Washington (IAD)

September is typically the cheapest month to fly

From $158 - $492 per traveler.
Flights from Portland (PWM) to Washington (IAD)
Origin airport
Portland Intl. Jetport
Destination airport
Washington Dulles Intl.
Airlines serving
American Airlines, Delta, United
Roundtrip price
$175
Distance
492 mi
Average flight time
3 hours 17 mins

Portland to Washington Flights

The cheapest times to fly from Portland 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 Portland to Washington are during the month of October. You can find some of the cheapest flights from Portland to Washington with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Portland to Washington

Sunday is one of the best days to book for cheap flights from Portland 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 Portland 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 Portland to Washington in 2025. You can also book with separate airlines for your outbound and return journeys, from $119 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 Portland 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 Portland 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.

 

Frequently asked questions

How much does a flight from Portland Intl. Jetport Airport (PWM) to Washington Dulles Intl. Airport (IAD) cost?
Lock in a cheap one-way flight from $119 or cheap return flight from $175 from Portland Intl. Jetport Airport (PWM) to Washington Dulles Intl. Airport (IAD) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Portland Intl. Jetport Airport (PWM) to Washington Dulles Intl. Airport (IAD)?
Flying in October is a good way to save, as it's the cheapest month for flights between PWM and IAD. You'll usually find the lowest fares during the off-season.
Which airlines fly direct from Portland Intl. Jetport Airport (PWM) to Washington Dulles Intl. Airport (IAD)?
You can fly straight from Portland Intl. Jetport Airport (PWM) to Washington Dulles Intl. Airport (IAD) on a United Airlines flight.
What is the cheapest airline that flies from Portland Intl. Jetport Airport (PWM) to Washington Dulles Intl. Airport (IAD)?
Use the filter tool on Expedia to compare different airlines and find the most affordable carrier that'll fly you from PWM to IAD. Then, sort your results by "Price (lowest to highest)" to snap up a good deal.
How many flights per day from Portland Intl. Jetport Airport (PWM) to Washington Dulles Intl. Airport (IAD)?
On average, Portland Intl. Jetport Airport (PWM) only offers 1 direct flight to Washington Dulles Intl. Airport (IAD) every day. To explore more options, try our easy-to-use filter tool. Simply enter your dates of travel, then select "1 Stop" or "2+ Stops" to discover flights with layovers.
What are the most popular departure times for flights from Portland Intl. Jetport Airport (PWM) to Washington Dulles Intl. Airport (IAD)?
The 1 PM departures from PWM to IAD are the top choice for many travelers. These flights can come with a higher price due to their popularity. If you're looking to save, book during off-peak hours.
What day of the week has the most flights from PWM to IAD?
Jet off on a Friday if you're after the best choice of flights from Portland Intl. Jetport Airport (PWM) to Washington Dulles Intl. Airport (IAD).
What is the earliest flight from Portland Intl. Jetport Airport (PWM) to Washington Dulles Intl. Airport (IAD)?
Portland Intl. Jetport Airport (PWM)'s earliest flight to Washington Dulles Intl. Airport (IAD) departs at approximately 1:38PM UTC-5. With a total journey time of 2h 7m, you'll land at around 3:45PM UTC-5.
How long does it take to fly from Portland Intl. Jetport Airport (PWM) to Washington Dulles Intl. Airport (IAD)?
It takes approximately 2 hours and 3 minutes to travel the 490 mi from PWM to IAD.
What airline has the least delays from PWM to IAD?
With 83% of journeys typically landing on schedule, United Airlines has the best on-time performance for direct flights from Portland Intl. Jetport Airport (PWM) to Washington Dulles Intl. Airport (IAD). To keep track of your flight status and get notified about any changes, simply head to the Expedia App.
What is the best time to fly from Portland Intl. Jetport Airport (PWM) to Washington Dulles Intl. Airport (IAD)?
To land at Washington Dulles Intl. Airport (IAD) without delays, opt for a flight that leaves from Portland Intl. Jetport Airport (PWM) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Washington from Portland Intl. Jetport Airport (PWM)?
Portland Intl. Jetport Airport (PWM) has direct flights to Washington. Here are some of the airports you can fly straight to:

  • Ronald Reagan Washington National Airport (DCA)
  • Baltimore Washington Intl. Thurgood Marshall Airport (BWI)
  • Washington Dulles Intl. Airport (IAD)

Is it cheaper to buy a plane ticket from Portland Intl. Jetport Airport (PWM) to Washington Dulles Intl. Airport (IAD) last-minute?
Booking your flight from PWM to IAD just before your journey is typically more expensive. But if there's some wiggle room with your travel dates and times, you could land a cheap last-minute fare.
Is it cheaper to book a PWM to IAD flight and hotel package?
You'll generally save money by securing a PWM to IAD flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage it all in one place. After selecting your ideal flights and accommodations, you can add extras such as car rentals, tours and activities.
Can I cancel or change the date of my flight from Portland Intl. Jetport Airport (PWM) to Washington Dulles Intl. Airport (IAD)?
If you booked your PWM to IAD flight within the last 24 hours, you may be able to cancel or modify it at no cost. Depending on the airline and the fare type you purchased, 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 want more information.

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*Available to One Key members.