PWM - IAD

$178 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 6/30. 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
Travelers love KAYAK
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Everything you should know

Cheapest round-trip
$264
Typical prices: $443-$289
United Airlines
Thu 7/16Sun 7/19
PWM - IAD • Non-stop
Cheapest one-way
$178
Typical prices: $201-$367
Multiple Airlines
Tue 6/30
PWM - IAD • 2 stops
Top airlines
Cheapest • from $264 (round-trip)
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
You can fly direct with United Airlines. Average duration is 1h 55m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Top layover airports
Cheapest • Avg $345 (round-trip)
Shortest trip • 5h 06m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 30% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 24% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
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
Flight Deals

Cheap Flights from Portland to Dulles Intl (PWM-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

Thu, Jul 16 - Sun, Jul 19
United Airlines Logo
7:16 pm - 9:14 pm
PWM
-
IAD
1h 58mnonstop
United Airlines Logo
10:10 pm - 11:51 pm
IAD
-
PWM
1h 41mnonstop
$264United Airlines
Fri, Oct 9 - Tue, Oct 13
Delta Logo
6:30 am - 11:52 am
PWM
-
IAD
5h 22m
1 stop
Delta Logo
7:59 pm - 11:49 pm
IAD
-
PWM
3h 50m
1 stop
$265Delta
Thu, Jul 2 - Sun, Jul 5
United Airlines Logo
10:55 am - 4:32 pm
PWM
-
IAD
5h 37m
1 stop
United Airlines Logo
8:20 am - 10:07 am
IAD
-
PWM
1h 47mnonstop
$269United Airlines
Fri, Oct 9 - Tue, Oct 13
Delta Logo
6:30 am - 11:52 am
PWM
-
IAD
5h 22m
1 stop
Delta Logo
6:10 am - 4:59 pm
IAD
-
PWM
10h 49m
2 stops
$270Delta
Fri, Jun 26 - Mon, Jun 29
United Airlines Logo
7:16 pm - 9:14 pm
PWM
-
IAD
1h 58mnonstop
United Airlines Logo
10:10 pm - 11:51 pm
IAD
-
PWM
1h 41mnonstop
$274United Airlines
Thu, Jul 16 - Sun, Jul 19
Delta Logo
6:00 am - 11:49 am
PWM
-
IAD
5h 49m
1 stop
Delta Logo
6:59 pm - 12:59 am
IAD
-
PWM
6h 00m
1 stop
$279Delta
Thu, Jul 16 - Sun, Jul 19
Delta Logo
6:00 am - 11:49 am
PWM
-
IAD
5h 49m
1 stop
Delta Logo
6:59 pm - 12:59 am
IAD
-
PWM
6h 00m
1 stop
$281Delta
Thu, Oct 22 - Mon, Nov 2
United Airlines Logo
3:31 pm - 9:27 pm
PWM
-
IAD
5h 56m
1 stop
United Airlines Logo
9:00 am - 10:44 am
IAD
-
PWM
1h 44mnonstop
$282United Airlines
Fri, Jul 24 - Mon, Jul 27
United Airlines Logo
5:15 am - 7:00 am
PWM
-
IAD
1h 45mnonstop
United Airlines Logo
5:42 pm - 11:30 pm
IAD
-
PWM
5h 48m
1 stop
$283United Airlines
Thu, Jul 16 - Tue, Jul 21
Delta Logo
6:00 am - 11:49 am
PWM
-
IAD
5h 49m
1 stop
Delta Logo
5:26 pm - 12:59 am
IAD
-
PWM
7h 33m
2 stops
$284Delta
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.

How much is a round-trip flight from Portland, Maine to Washington, D.C. Dulles Intl Airport?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Portland, Maine to Washington, D.C. Dulles Intl Airport departing in July.

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.

If you are looking for a flight deal from Portland to Washington Dulles Airport, look for departures on Fridays and avoid leaving on a Monday, as it's usually the priciest day. When flying back from Washington Dulles Airport, Wednesday is the cheapest day to fly and Monday is 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 September, where tickets cost $260 (return) on average. On the other hand, the most expensive months are March and December, where the average cost of round-trip tickets is $417 and $392 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.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at $394 on average.

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 3 weeks before departure, which saves you about 30% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 21 weeks before departure.

Good to know

Low seasonFebruary
Cheapest flight$178
Best time to beat the crowds with an average 15% drop in price.
Most popular time to fly with an average 3% 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 5 days, the lowest price for a flight from Portland to Washington, D.C. Dulles Intl Airport was $178 for a one-way ticket and $264 for a round-trip.

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

    A passport is not required to fly from Portland to Washington Dulles Airport.

  • 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: American Airlines, Hawaiian Airlines, JetBlue, Delta, United Airlines, and Lufthansa.

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

    The Boeing 737 MAX 8 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?

    Star Alliance is the only airline alliance operating flights between Portland and Washington Dulles Airport.

  • 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.

  • 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 $209 or less one-way and $345 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 airline flying 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.
7.4
United AirlinesOverall score based on 9804 reviews
8.1Crew
7.3Comfort
7.1Entertainment
6.6Food
7.7Boarding
Airline reviews

Our flight was delayed 2.5 hours from Lisbon to DC so we missed our connection to Seattle that would have arrived at about 9 PM. The agent initially said we had to stay overnight in DC and there were no other options to put us on to get us to Seattle. While on board I discovered a flight via American he could have put us in but by the time we arrived in DC that was sold out. We were then put on a flight to San Francisco that was also delayed then arrived in San Francisco and our flight to Seattle was also delayed so we ended up not arriving until 2:15 am. Our son could not pick us up so we ended up having to pay over $100 to Uber home. This is the second trip with United that the flight has been delayed causing us to miss an evening in Las Vegas and we were given nothing.

2.0 MediocreLinda, Jun 2026
LIS - IAD
Read more United Airlines reviews

Our flight was delayed 2.5 hours from Lisbon to DC so we missed our connection to Seattle that would have arrived at about 9 PM. The agent initially said we had to stay overnight in DC and there were no other options to put us on to get us to Seattle. While on board I discovered a flight via American he could have put us in but by the time we arrived in DC that was sold out. We were then put on a flight to San Francisco that was also delayed then arrived in San Francisco and our flight to Seattle was also delayed so we ended up not arriving until 2:15 am. Our son could not pick us up so we ended up having to pay over $100 to Uber home. This is the second trip with United that the flight has been delayed causing us to miss an evening in Las Vegas and we were given nothing.

MY FAMILY'S LUGGAGE WAS LOST FROM ROME TO BARI. I WAS THE ONLY ONE THAT RECEIVED MY LUGGAGE FROM ROME TO BARI. AFTER DEPLANING IN BARI, WE WASTED A LOT OF TIME AT BAG CLAIMS LOST AND FOUND REPORTING THE CLAIM AND PLEADING FOR THE BAGS TO BE DELIVERED THE NEXT DAY. WE WERE TOLD THAT IT TAKES 3 DAYS MINIMUM TO DELIVER. MY DAUGHTER AND MY GIRLFRIEND NEEDED THEIR PERSONAL THINGS AND WE WERE STAYING 3 HOURS AWAY FROM THE BARI AIRPORT. WE HAD TO DRIVE 3 HOURS TO THE AIRPORT TO COLLECT OUR LOST LUGGAGE THE NEXT DAY. WE ARE NOT HAPPY WITH THE EXPERIENCE

There were no facilities in the middle of the aircraft and premium economy was not allowed to use the business class facilities, and had to share the only two toilets at the back with economy. The upgrade to Premium was definitely not worth it

Our flight to Rome, Italy was cancelled the day of and we were never informed. We only found out because I was trying to get into my husbands account and called to get his account number. Had to pay more for worse seating on another airline.

The economy seat was much less comfortable for an international flight in terms of recline and moving space when food tray is expanded. Per entertainment, it would be amazing if I could connect my Bluetooth headset or ear phones to the entertainment screen. Or provide in-flight wifi to connect directly from my own device.

We were a little disappointed to not be able to complete check in online without uploading pics of passports. Also we have KTN's and they weren't on our boarding passes when we got to security. Had to trek back to counter to have them fix.

Excellent service in Polaris class IAD to ZRH. Arrived rested and well fed after the overnight flight.

It's a short hop. My carryon was checked at the gate, I didn't have to drag it all over the airport. Excellent wheelchair assist.

Was great in general, try to respect time and excuses when slight changes have been made, appreciated!

Terrific in every way. On time, professional staff, multiple movie options to select, great food and drink.

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

Information on your arrival and departure airports