$158 Cheap Flights from Washington (IAD) to Portland (PDX)

View $158 flight on Tue, Sep 16, 2025Opens in a new window

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

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Cheap Flights from Washington to Portland (IAD-PDX)

Prices were available within the past 7 days and start at $158 for one-way flights and $297 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sat, Oct 11 - Wed, Oct 15
IAD
Washington
PDX
Portland
$297 Roundtrip, found 12 hours ago
$297
Roundtrip
found 12 hours ago
Select United flight, departing Sat, Oct 11 from Washington to Portland, returning Wed, Oct 15, priced at $297 found 12 hours ago
Alaska Airlines
Sat, Sep 6 - Sat, Sep 20
IAD
Washington
PDX
Portland
$299 Roundtrip, found 4 days ago
$299
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Sat, Sep 6 from Washington to Portland, returning Sat, Sep 20, priced at $299 found 4 days ago
United
Sat, Oct 11 - Sat, Oct 18
IAD
Washington
PDX
Portland
$303 Roundtrip, found 14 hours ago
$303
Roundtrip
found 14 hours ago
Select United flight, departing Sat, Oct 11 from Washington to Portland, returning Sat, Oct 18, priced at $303 found 14 hours ago
Alaska Airlines
Tue, Sep 2 - Mon, Sep 8
IAD
Washington
PDX
Portland
$306 Roundtrip, found 4 days ago
$306
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Tue, Sep 2 from Washington to Portland, returning Mon, Sep 8, priced at $306 found 4 days ago
United
Sat, Aug 16 - Wed, Aug 20
IAD
Washington
PDX
Portland
$307 Roundtrip, found 2 days ago
$307
Roundtrip
found 2 days ago
Select United flight, departing Sat, Aug 16 from Washington to Portland, returning Wed, Aug 20, priced at $307 found 2 days ago
Frontier Airlines
Mon, Jul 21 - Tue, Aug 5
IAD
Washington
PDX
Portland
$309 Roundtrip, found 3 days ago
$309
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Mon, Jul 21 from Washington to Portland, returning Tue, Aug 5, priced at $309 found 3 days ago
United
Wed, Aug 13 - Tue, Aug 19
IAD
Washington
PDX
Portland
$310 Roundtrip, found 14 hours ago
$310
Roundtrip
found 14 hours ago
Select United flight, departing Wed, Aug 13 from Washington to Portland, returning Tue, Aug 19, priced at $310 found 14 hours ago
Hawaiian Airlines
Sat, Sep 27 - Sat, Sep 27
IAD
Washington
PDX
Portland
$311 Roundtrip, found 2 days ago
$311
Roundtrip
found 2 days ago
Select Hawaiian Airlines flight, departing Sat, Sep 27 from Washington to Portland, returning Sat, Sep 27, priced at $311 found 2 days ago
Alaska Airlines
Wed, Aug 20 - Wed, Aug 20
IAD
Washington
PDX
Portland
$311 Roundtrip, found 1 day ago
$311
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Wed, Aug 20 from Washington to Portland, returning Wed, Aug 20, priced at $311 found 1 day ago
Southwest Airlines
Mon, Aug 18 - Sat, Aug 23
IAD
Washington
PDX
Portland
$312 Roundtrip, found 1 day ago
$312
Roundtrip
found 1 day ago
Select Southwest Airlines flight, departing Mon, Aug 18 from Washington to Portland, returning Sat, Aug 23, priced at $312 found 1 day ago

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

May is typically the cheapest month to fly

From $208 - $397 per traveler.

Graph displaying average flight prices per month

Alternative airports near Portland

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

Select flight to Portland Intl. PDX. Cheapest and Closest option available. Average driving time to city center is 17 minutes. Flights from $427
PDX
Portland Intl.
CheapestClosest
Average driving time to city center17 min
Flights from $427
Flights from Washington (IAD) to Portland (PDX)
Origin airport
Washington Dulles Intl.
Destination airport
Portland Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Hawaiian Airlines, Southwest Airlines, Sun Country Airlines, United
Roundtrip price
$297
Distance
2321 mi
Average flight time
4 hours 3 mins

Washington to Portland Flights

The cheapest times to fly from Washington to Portland

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

 

The best time to book a flight from Washington to Portland

Sunday is one of the best days to book for cheap flights from Washington to Portland: 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 Washington to Portland

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 Washington to Portland in 2025. You can also book with separate airlines for your outbound and return journeys, from $158 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 Washington to Portland 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 Washington to Portland 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 Washington Dulles Intl. Airport (IAD) to Portland Intl. Airport (PDX) cost?
Find affordable return tickets from Washington Dulles Intl. Airport (IAD) to Portland Intl. Airport (PDX) starting from $297. Grab a seat and get ready for takeoff. This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a United flight leaving IAD on July 28 2025 and touching down at PDX. The price was last updated on July 1 2025 and has not changed since.
What is the cheapest month to fly from IAD to PDX?
Search for direct flights from IAD to PDX in November to score cheaper fares. You can find a one-way United flight for $169 leaving on November 15 2025. This price is based on the cheapest direct flight found on Expedia for this route in the next 330 days. The price was last updated on July 1 2025 and remains unchanged.
Which airlines fly direct from Washington Dulles Intl. Airport (IAD) to Portland Intl. Airport (PDX)?
You can't fly nonstop from Washington, DC (IAD-Washington Dulles Intl.) to Portland Intl. Airport (PDX). However, you can seamlessly travel to Portland without any layovers by departing from Ronald Reagan Washington National Airport (DCA).
What is the cheapest airline that flies from IAD to PDX?
Right now, the cheapest airline operating one-way flights from IAD to PDX is United. You can take off on this route from $169. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from IAD on September 24 2025. Prices were last updated on July 1 2025 and have not changed since.
How many flights per day from Washington Dulles Intl. Airport (IAD) to Portland Intl. Airport (PDX)?
You'll need to hop on a flight with a layover when traveling from Washington Dulles Intl. Airport (IAD) to Portland Intl. Airport (PDX). There are no daily direct flights on this route. However, just filter your search to include one or two stops to discover an option that works for you.
What day of the week has the most flights from IAD to PDX?
Friday is usually the busiest day for flights, while Tuesday is often the quietest.* Just remember that flight schedules can vary depending on a number of factors, including the airline and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Washington Dulles Intl. Airport (IAD) to Portland Intl. Airport (PDX)?
Book a flight from Washington Dulles Intl. Airport (IAD) to Portland Intl. Airport (PDX) that leaves before 3 PM to reduce the risk of cancellations and delays. Later departures are on average 22% more likely to be canceled.**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.
Is it cheaper to buy a plane ticket from Washington Dulles Intl. Airport (IAD) to Portland Intl. Airport (PDX) last-minute?
Booking your ticket from IAD to PDX shortly before your getaway is typically more expensive. But if you're flexible with your departure dates and times, you could grab a cheap last-minute fare.
Is it cheaper to book an IAD to PDX flight and hotel package?
Compared with arranging flights and hotels separately, booking an IAD to PDX flight and hotel package with Expedia could result in significant savings. Better still, managing everything in one place will take the hassle out of planning your trip. Just pick your flights and choose from our extensive range of stays, then personalize your trip with other add-ons like tours, activities and car rentals.
Can I cancel or change the date of my flight from Washington Dulles Intl. Airport (IAD) to Portland Intl. Airport (PDX)?
Typically, it's possible to cancel or reschedule your IAD to PDX flight. However, for bookings made more than 24 hours ago, additional charges may apply. Check your airline's policies in your itinerary to see what changes are allowed and if any costs are involved. You'll also find more information on our Customer Service portal.

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