PDX - IAD

$139 Find Cheap Flights from Portland to Washington Dulles Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Portland to Dulles Intl departing on 5/18. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Washington, D.C. Dulles Intl Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Portland to Washington, D.C., as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Portland to Washington, D.C., as well as popular online travel agencies
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41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$292
Overall average: $437
Delta
Mon 4/27Mon 5/4
PDX - IAD • 1 stop
Cheapest non-stop
$417
Typical prices: $416-$603
United Airlines
Thu 5/28Sat 6/6
PDX - IAD • Non-stop
Advice from real travelers
AI-powered summary based on content written by travel experts. AI can make mistakes.
PDX offers easy navigation with clear signage.
The Silver Line Metro connects IAD to downtown D.C.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Cheapest • from $292 (round-trip)
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
You can fly direct with United Airlines. Average duration is 5h 02m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Top layover airports
Cheapest • Avg $243 (round-trip)
Shortest trip • 7h 12m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 55% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 30% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Dulles Intl!
Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights from Portland to Dulles Intl (PDX-IAD)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Portland to Dulles Intl that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Portland to Dulles Intl

Mon, Apr 27 - Mon, May 4
Delta Logo
11:15 pm - 10:18 am
PDX
-
IAD
8h 03m
1 stop
Delta Logo
7:00 am - 5:10 pm
IAD
-
PDX
13h 10m
1 stop
$292Delta
Sat, Apr 25 - Thu, Apr 30
Alaska Airlines Logo
8:45 am - 12:09 am
PDX
-
IAD
12h 24m
1 stop
Alaska Airlines Logo
7:10 am - 7:34 pm
IAD
-
PDX
15h 24m
1 stop
$296Alaska Airlines
Sat, Apr 25 - Wed, Apr 29
Alaska Airlines Logo
1:52 pm - 12:09 am
PDX
-
IAD
7h 17m
1 stop
Alaska Airlines Logo
6:56 pm - 9:48 am
IAD
-
PDX
17h 52m
1 stop
$297Alaska Airlines
Tue, Apr 28 - Fri, May 8
Delta Logo
5:30 am - 11:55 pm
PDX
-
IAD
15h 25m
1 stop
Delta Logo
7:00 am - 7:26 pm
IAD
-
PDX
15h 26m
1 stop
$302Delta
Mon, Jun 1 - Fri, Jun 5
Frontier Logo
6:19 pm - 8:12 am
PDX
-
IAD
10h 53m
1 stop
Frontier Logo
9:12 am - 5:24 pm
IAD
-
PDX
11h 12m
1 stop
$306Frontier
Wed, Apr 29 - Thu, May 7
Alaska Airlines Logo
1:52 pm - 12:09 am
PDX
-
IAD
7h 17m
1 stop
Alaska Airlines Logo
7:10 am - 12:52 pm
IAD
-
PDX
8h 42m
1 stop
$307Alaska Airlines
Fri, May 29 - Mon, Jun 1
Frontier Logo
6:19 pm - 8:12 am
PDX
-
IAD
10h 53m
1 stop
Frontier Logo
9:12 am - 5:24 pm
IAD
-
PDX
11h 12m
1 stop
$310Frontier
Fri, Apr 24 - Sun, May 3
Delta Logo
1:32 pm - 11:55 pm
PDX
-
IAD
7h 23m
1 stop
Delta Logo
6:00 am - 12:49 pm
IAD
-
PDX
9h 49m
1 stop
$312Delta
Fri, May 1 - Tue, May 5
Delta Logo
11:15 pm - 10:18 am
PDX
-
IAD
8h 03m
1 stop
Delta Logo
7:20 am - 12:17 pm
IAD
-
PDX
7h 57m
1 stop
$317Delta
Wed, Apr 29 - Sun, May 3
Alaska Airlines Logo
1:52 pm - 12:09 am
PDX
-
IAD
7h 17m
1 stop
Alaska Airlines Logo
7:10 am - 7:34 pm
IAD
-
PDX
15h 24m
1 stop
$321Alaska Airlines
Booking Insights

KAYAK's insights & trends for Portland to Dulles Intl flights

Get data-powered insights and trends into flights from Portland to Dulles Intl to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Portland to Washington Dulles Airport?

The average price of all round-trip flights from Portland to Washington, D.C. Dulles Intl Airport clicked on KAYAK for each day over the last 12 months.

For Portland to Washington Dulles Airport, Wednesday is the cheapest day to fly on average and Sunday is the most expensive. Flying from Washington Dulles Airport back to Portland, the best deals are generally found on Saturday, with Sunday being the most expensive.

What is the cheapest month to fly from Portland to Washington, D.C. Dulles Intl Airport?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Portland to Washington, D.C. Dulles Intl Airport, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Portland to Washington, D.C. Dulles Intl Airport is January, where tickets cost $296 (return) on average. On the other hand, the most expensive months are June and December, where the average cost of round-trip tickets is $491 and $490 respectively.

Can I save money by flying with a layover from Portland to Washington, D.C. Dulles Intl Airport?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $464, prices are generally cheapest when you fly direct.

How far in advance should I book a flight from Portland to Washington, D.C. Dulles Intl Airport?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Portland to Washington, D.C. Dulles Intl Airport, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Portland to Washington, D.C. Dulles Intl Airport, you should book around 4 weeks before departure, which saves you about 55% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 25 weeks before departure.

Expert advice

Expert advice for your flight from Portland to Dulles Intl

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Gabriel Leigh

Gabriel Leigh

Expert on PDX

Gabriel is a writer and video creator. As senior content producer for Flightradar24 and Monocle’s transport correspondent, he keeps a close eye on aviation in particular. He has also written travel articles for the likes of The New York Times. Born in New York but raised around the world, he now lives in Sweden. He’s been to 75 countries, flying 2.3 million miles on 113 airlines and through 234 airports in the process.

Stefanie Waldek

Stefanie Waldek

Expert on IAD

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Good to know

Low seasonJanuary
Cheapest flight$139
Best time to beat the crowds with an average 31% drop in price.
Most popular time to fly with an average 2% increase in price.
Flight from Portland to Washington Dulles Airport

When to book flights from Portland to Dulles Intl

Are your dates flexible? Find out the best times to travel from Portland to Dulles Intl based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Portland to Washington Dulles Airport flights

  • What is the cheapest flight from Portland to Washington, D.C. Dulles Intl Airport?

    In the last 3 days, the lowest price for a flight from Portland to Washington, D.C. Dulles Intl Airport was $139 for a one-way ticket and $292 for a round-trip.

  • Do I need a passport to fly between Portland and Washington Dulles Airport?

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

  • Which airlines offer Wi-Fi service onboard planes from Portland to Washington Dulles Airport?

    All the following airlines offer inflight Wi-Fi service on the Portland to Washington Dulles Airport flight route: Alaska Airlines, Hawaiian Airlines, JetBlue, Delta, KLM, and American Airlines.

  • Which aircraft models fly most regularly from Portland to Washington Dulles Airport?

    The Boeing 737 MAX 9 is the aircraft model that flies most regularly on the Portland to Washington Dulles Airport flight route.

  • Which airline alliances offer flights from Portland to Washington Dulles Airport?

    SkyTeam, oneworld, and Star Alliance are the airline alliances operating flights between Portland and Washington Dulles Airport, with SkyTeam being the most commonly used for this route.

  • On which days can I fly direct from Portland to Washington Dulles Airport?

    There are nonstop flights from Portland to Washington Dulles Airport on a daily basis.

  • Which is the best airline for flights from Portland to Washington, D.C., Southwest or Alaska Airlines?

    The two airlines most popular with KAYAK users for flights from Portland to Washington, D.C. are Southwest and Alaska Airlines. With an average price for the route of $381 and an overall rating of 8.0, Southwest is the most popular choice. Alaska Airlines is also a great choice for the route, with an average price of $406 and an overall rating of 7.9.

  • How does KAYAK find such low prices on flights from Portland to Washington Dulles Airport?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Portland to Washington Dulles Airport.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Portland to Washington Dulles Airport?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Washington Dulles Airport from Portland is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Portland to Washington Dulles Airport?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Washington Dulles Airport with an airline and back to Portland with another airline. Booking your flights between Portland and IAD can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Portland to Washington Dulles Airport?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Washington Dulles Airport from Portland up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Portland to Washington, D.C. Dulles Intl Airport

  • Looking for a cheap flight? 25% of our users found flights on this route for $204 or less one-way and $394 or less round-trip.

Prefer to fly direct from Portland to Washington Dulles Airport?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Portland to Washington, D.C. Dulles Intl.
Find which airlines fly direct from Portland Airport to Washington, D.C. Dulles Intl Airport, which days they fly and book direct flights.

Direct departures

Portland to Washington, D.C. Dulles Intl

Monday

United Airlines

United Airlines

Tuesday

United Airlines

United Airlines

Wednesday

United Airlines

United Airlines

Thursday

United Airlines

United Airlines

Friday

United Airlines

United Airlines

Saturday

United Airlines

United Airlines

Sunday

United Airlines

United Airlines

See more direct flights

Direct returns

Washington, D.C. Dulles Intl to Portland

Monday

United Airlines

United Airlines

Tuesday

United Airlines

United Airlines

Wednesday

United Airlines

United Airlines

Thursday

United Airlines

United Airlines

Friday

United Airlines

United Airlines

Saturday

United Airlines

United Airlines

Sunday

United Airlines

United Airlines

See more direct flights

Reviews of the top 4 airlines serving from Portland to Dulles Intl

 
See real verified KAYAK customer reviews for airlines flying from Portland to Washington, D.C.. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Portland to Dulles Intl? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4318 reviews
8.1Boarding
8.0Comfort
7.0Food
8.6Crew
7.5Entertainment
Airline reviews

Long layover between flights to Long Island from BWI - need better coordination between flights

4.0 OkayKenny, Mar 2026
TPA - BWI
Read more Southwest reviews

Long layover between flights to Long Island from BWI - need better coordination between flights

I elected to pay for the upgrades and found very little difference

The new seating arrangement is so over priced for what you get.

The problem with the seat assignments is that there were a lot of rows in the front that were empty but my row at the back was full. Just not so pleasant.

No food or entertainment, just a quick 40 minute flight. A little bumpy due to Santa Ana winds but pilot has no control over that. Good flight and landing!

Good but I prefer choose your own seat. With the new assigned seats they should board from the back I see no advantage to this new boarding. Just like every other airline

I realize they are still working out kinks with the new boarding process, but by the time I boarded in group 5, most of the bins were full. All airlines should better enforce small bags and jackets going under the seats until everyone has boarded.

WiFi was not working and didn’t have a beverage service

Snacks are always pretzels. Why can't you also offer peanuts ?

Flight boarded late after announcing on time boarding. Flight arrived only a little late despite late departure. Had trouble connecting to WiFi

Never got on because first part of trip was cancelled and we have no idea when we will get rebooked…

Wonderful as always! Pleasant staff, smooth ride, and timely departure.

Everything ran like it should. Staff was professional. Looking forward to flying with them again.

Liked the attention and speed when getting wheelchair..........Was assured by phone that my needs would be taken care of and they were with my name.

The seats were spacious and comfortable. Even in basic economy. However, the flight boarded 30 minutes late.

Alaska used to be a top notch airline. With it's growth it is now in line with the big airlines. Not bad, not great.

Great. I did have a little issue getting into the Lounge, which is likely more an American Airlines issue. I did not carry my physical AAdvantage Executive credit card with me on this trip, which Admirals Club membership is a part of the benefits of having this card. The instructions on the AA website and the Citi cards website make it seem like you don't need the physical card, as both sites state you can enter with your boarding pass and driver's license. But both lounges said you were required to present the physical card (and not the digital version, via Apple Pay), as only the physical card says "Admirals Club" on the back.I also do not have a physical Admirals Club membership card, so while both lounges eventually let me in, both denied me entrance initially for this reason.

Everything from the time I booked my flight through to the end when I got home was smooth and wonderful. Service was great, the flight attendants were attentive and there were no outstanding delays.

Delayed and no entertainment? I also forgot my headphones and immediately reported it and have not heard back yet.

The crew was very friendly. Boarding was quick and efficient.

We landed and sat on the tarmac for 45 minutes because they only have one gate at the airport and there was another plane running late so we had to wait

The WiFi was not working. That made for a long flight.

Absolutely no communication on why there's a delay and multiple flight time reschedules. I would have canceled the flight and drove back home if I known it was going to be rescheduled 3 or 4 times.

Another late night flight and MORE men belligerently drinking and yelling. I had to move from first to economy because they were so obnoxious and disruptive. Crazy to go from a cozy chair to cardboard when you were supposed to be in first. Delta allows was too much drinking which leads to belligerent behavior.

I was in first class and literally the men behind me were so aggressively loud I moved myself to economy. This has become so common on Delta - people using audio without headphones, and men on 12am / late night flights drinking and yelling to talk to each other which prevents anyone around them from resting. Pretty crazy to have to move from first to economy (poorer service, less comfort...). Wild wild. Looking into other airlines.

Love delta smaller commuter plane so no entertainment and paid wifi on MKE-LGA leg was extremely unreliable and slow

Stop changing gates. Stop cancelling flights Stop moving my seat.

Extremely disappointed with Delta. They canceled flight last minute and then I rebooked the other flights and with which were delayed as well

Could not get my connecting flight boarding pass until four hrs before departure! Ver annoying especially since the staff could not explain why!

The flight was flying with 30% capacity. The flight my seat from preferred seating to back of the seat. Even though i can understand that this was to balance the flight weight. The flight attendance decided to do the serving near my seat and in the middle , their noices woke me up from sleep , when i realized that the service has ended and when they were going back asked for a coffee, for which they answered they have completed teh service in my location. That really upset me as they woke me up and also rejected the coffee i asked. I ended up landing with a headache, thanks to the crew that screwed up my travel

It was okay, the food was good, but after the landing there was not enough time for luggage and security to catch a connection. It was crowded on board.

When I went to check in at the United counter in Barcelona, Spain I had 2 different menat 2 different times in United uniforms (standing around with a couple other employees) ask me if I was traveling alone. The one man asked me 3 different ways if I was traveling alone. I am, 68 yeaers old and have all my faculties. I thought it was weird and it made me feel very uncomfortable. What difference does it make if I was traveling alone or with someone? What if I was a recent widow? That would have been horrible. They never gave me a reason why they needed to know who I was traveling with. I was hesitant to question them because I needed to be on that flight.

Crew was great. 2 1/2 hour delay was due to staff needing "rest" was avoidable and self inflicted as United not willing to hire enough crew to keep flight on time.. Ridiculous. The crew and the passengers both suffered due to this.

Fine not above and beyond as I had a connection that was delayed due to maintenance

Bad food, bad service, cold cabin with no additional blankets when asked for (they told me they don’t provide additional blankets). I’m a frequent traveler and this is one of the worst companies I traveled with (by the way I thought that I booked my ticket with Lufthansa but I didn’t see that the flights were handled by United).

Great other than a couple very drunk guys that for a while kept bumping my seat from behind. The staff did their best to control them. Even refused serving them alcohol and allowed the gal sitting next to them to move.

Good crew. Boarding delays. Almost two hours wait for the bags in DC.

Unfortunately weather delayed our flight waiting for our plane to arrive and due to a little snow time was needed to deice the plane so departure was very delayed and I missed the connecting flight

It was great. There were some issues prior to takeoff. The weather was poor so we had to go through deicing, and we were delayed a bit by the pilots' concern about one of the engines, but that's aviation. The pilots handled everything with aplomb, and kept us apprised

The seats were comfortable and we had leg room. Great entertainment.

Everything you need to know for your flight from Portland to Dulles Intl

Information on your arrival and departure airports