$148 Cheap Flights from Portland (PDX) to Washington (IAD)

View $148 flight on Tue, Feb 3, 2026Opens in a new window

Popular airlines from Portland International Airport (PDX) to Washington Dulles Intl. Airport (IAD)

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Cheap Flights from Portland to Washington (PDX-IAD)

Prices were available within the past 7 days and start at $148 for one-way flights and $235 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Tue, Jan 6 - Tue, Jan 27
PDX
Portland
IAD
Washington
$235 Roundtrip, found 6 days ago
$235
Roundtrip
found 6 days ago
Select American Airlines flight, departing Tue, Jan 6 from Portland to Washington, returning Tue, Jan 27, priced at $235 found 6 days ago
Southwest Airlines
Tue, Feb 3 - Tue, Feb 24
PDX
Portland
IAD
Washington
$248 Roundtrip, found 6 days ago
$248
Roundtrip
found 6 days ago
Select Southwest Airlines flight, departing Tue, Feb 3 from Portland to Washington, returning Tue, Feb 24, priced at $248 found 6 days ago
American Airlines
Tue, Feb 3 - Tue, Feb 24
PDX
Portland
IAD
Washington
$266 Roundtrip, found 6 days ago
$266
Roundtrip
found 6 days ago
Select American Airlines flight, departing Tue, Feb 3 from Portland to Washington, returning Tue, Feb 24, priced at $266 found 6 days ago
American Airlines
Tue, Jan 6 - Tue, Jan 27
PDX
Portland
IAD
Washington
$267 Roundtrip, found 6 days ago
$267
Roundtrip
found 6 days ago
Select American Airlines flight, departing Tue, Jan 6 from Portland to Washington, returning Tue, Jan 27, priced at $267 found 6 days ago
American Airlines
Sun, Jan 18 - Sat, Jan 24
PDX
Portland
IAD
Washington
$270 Roundtrip, found 6 days ago
$270
Roundtrip
found 6 days ago
Select American Airlines flight, departing Sun, Jan 18 from Portland to Washington, returning Sat, Jan 24, priced at $270 found 6 days ago
American Airlines
Tue, Jan 6 - Tue, Jan 27
PDX
Portland
IAD
Washington
$271 Roundtrip, found 6 days ago
$271
Roundtrip
found 6 days ago
Select American Airlines flight, departing Tue, Jan 6 from Portland to Washington, returning Tue, Jan 27, priced at $271 found 6 days ago
American Airlines
Tue, Jan 6 - Tue, Jan 27
PDX
Portland
IAD
Washington
$273 Roundtrip, found 6 days ago
$273
Roundtrip
found 6 days ago
Select American Airlines flight, departing Tue, Jan 6 from Portland to Washington, returning Tue, Jan 27, priced at $273 found 6 days ago
Alaska Airlines
Tue, Jan 6 - Tue, Jan 27
PDX
Portland
IAD
Washington
$283 Roundtrip, found 6 days ago
$283
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Tue, Jan 6 from Portland to Washington, returning Tue, Jan 27, priced at $283 found 6 days ago
United
Tue, Dec 23 - Tue, Dec 30
PDX
Portland
IAD
Washington
$287 Roundtrip, found 21 hours ago
$287
Roundtrip
found 21 hours ago
Select United flight, departing Tue, Dec 23 from Portland to Washington, returning Tue, Dec 30, priced at $287 found 21 hours ago
Delta
Tue, Dec 9 - Tue, Jan 6
PDX
Portland
IAD
Washington
$297 Roundtrip, just found
$297
Roundtrip
just found
Select Delta flight, departing Tue, Dec 9 from Portland to Washington, returning Tue, Jan 6, priced at $297 just found

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

May is typically the cheapest month to fly

From $208 - $446 per traveler.

Alternative airports near Washington

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

Select flight to Washington Dulles Intl. IAD. Cheapest option available. Average driving time to city center is 36 minutes. Flights from $448
IAD
Washington Dulles Intl.
Cheapest
Average driving time to city center36 min
Flights from $448

Frequently asked questions

How much does a flight from Portland Intl. Airport (PDX) to Washington Dulles Intl. Airport (IAD) cost?
Get a cheap one-way flight from $148 or cheap return flight from $235 from Portland Intl. Airport (PDX) to Washington Dulles Intl. Airport (IAD) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Portland Intl. Airport (PDX) to Washington Dulles Intl. Airport (IAD)?
Planning your getaway for January can help you save, as it's the cheapest month for flights between PDX and IAD. You'll typically find the lowest prices during the off-season.
What is the cheapest airline that flies from Portland Intl. Airport (PDX) to Washington Dulles Intl. Airport (IAD)?
To find the cheapest airline flying from PDX to IAD, use Expedia's filter tool. Customize your search based on your travel style, such as preferred carriers and cabin class. You can then sort your results by "Price (lowest to highest)" to see the cheapest flights first.
How many flights per day from Portland Intl. Airport (PDX) to Washington Dulles Intl. Airport (IAD)?
You'll have to hop on a flight with a layover when traveling from Portland Intl. Airport (PDX) to Washington Dulles Intl. Airport (IAD). Direct flights don't operate daily on this route. However, just filter your search to include one or more stops to find the best option for your trip.
What day of the week has the most flights from PDX to IAD?
Friday is typically the busiest day for flights, while Tuesday tends to be the quietest.* Keep in mind that flight schedules can vary based on a range of factors, such as the carrier and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What airline has the least delays from PDX to IAD?
Consider traveling with United Airlines if you'd like to fly straight from Portland Intl. Airport (PDX) to Washington Dulles Intl. Airport (IAD) without any holdups. This airline has the best track record for punctuality, with an on-time performance of 88%. Want to be notified if anything changes? You can check your flight status using the Expedia App.
What is the best time to fly from Portland Intl. Airport (PDX) to Washington Dulles Intl. Airport (IAD)?
To land at Washington Dulles Intl. Airport (IAD) on time, opt for a flight that leaves from Portland Intl. Airport (PDX) before 3 PM. The likelihood 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. Airport (PDX)?
Compare your flight options from Portland Intl. Airport (PDX) to Ronald Reagan Washington National Airport (DCA). This is the only Washington airport you can arrive at if you're taking a direct flight.
Is it cheaper to buy a plane ticket from Portland Intl. Airport (PDX) to Washington Dulles Intl. Airport (IAD) last-minute?
Holding off until just before your departure to book your flight from PDX to IAD generally means paying more. While you might find some last-minute offers, there's no guarantee. Be flexible with your itinerary to boost your chances of scoring a bargain.
Is it cheaper to book a PDX to IAD flight and hotel package?
Compared with arranging hotels and flights separately, booking a PDX to IAD flight and hotel package with Expedia could result in significant savings. Better still, having everything in one easy place takes the hassle out of travel planning. Just pick your flights and choose from our wide range of stays, then personalize your trip with other add-ons like activities, tours and car rentals.
Can I cancel or change the date of my flight from Portland Intl. Airport (PDX) to Washington Dulles Intl. Airport (IAD)?
In most cases, you're able to reschedule or cancel your PDX to IAD flight. However, additional charges may apply, especially if you booked over 24 hours ago. Check your itinerary for the airline's policies and fees on flight changes, or if you want further information, visit our Customer Service portal.

Travel information

Origin airport
Portland Intl.
Destination airport
Washington Dulles Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Hawaiian Airlines, Southwest Airlines, United
Roundtrip price
$235
Distance
2321 mi
Average flight time
4 hours 55 mins

Book with confidence

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 January. 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 $148 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.

 

Portland to Washington Flights

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