$139 Cheap United flights Washington (IAD) to Portland (PWM)

Scoring cheap one-way United Airlines flights from IAD to PWM from $139 on Expedia is easy — just filter by “Price (lowest to highest).” Or check out our affordable round-trip fares from $239 for your next exciting vacation.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

January is one of the cheapest months to jet off to Portland with United Airlines. You could also find excellent prices on return and one-way fares in February.

Look for affordable United Airlines flights from Washington Dulles Intl. Airport (IAD) to Portland Intl. Jetport Airport (PWM) one to three months prior to your day of departure. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. No matter the fare type and itinerary, the ideal day to book a domestic flight is generally Sunday and the most expensive day is typically Monday. Passengers who book on a Sunday can save 6% on average compared to those who book on a Monday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

Hop on one of United Airlines’s 11 direct weekly flights from Washington Dulles Intl. Airport (IAD) to Portland Intl. Jetport Airport (PWM). To see what’s available, enter your origin, dates and destination and hit search. Then apply the “Nonstop” and “Airline” filters.

It takes approximately 1h 43m to travel nonstop from Washington Dulles Intl. Airport (IAD) to Portland Intl. Jetport Airport (PWM) with United Airlines.

Thursday has the most United Airlines flights from Washington Dulles Intl. Airport (IAD) to Portland Intl. Jetport Airport (PWM). With 2 daily departures, this is the best day of the week to book something that will fit your plans.

The earliest flight from IAD to PWM with United Airlines leaves at 8:45AM UTC-5. You’ll touch down at 10:28AM UTC-5. The last United Airlines flight of the day takes off at 1:20PM UTC-5 and arrives at 3:04PM UTC-5. With approximately 20% fewer cancellations for morning and mid-morning departures, beginning your travel day early is usually the best way to go.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

Portland Intl. Jetport Airport (PWM) is the primary Portland gateway for United Airlines flights from Washington Dulles Intl. Airport (IAD).

Depart from IAD to PWM with United Airlines and you’ll enjoy a host of benefits including a rewarding loyalty program. When you book through Expedia as a United Mileage Plus and One Key™ member, you can also earn OneKeyCash™* to redeem on select future travel purchases.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

United Airlines generally uses Canadair (Bombardier) Regional Jet 550 planes for flights from Washington Dulles Intl. Airport (IAD) to Portland Intl. Jetport Airport (PWM). This airline also operates the Embraer 175 on this route. Keep in mind that aircraft type can vary due to operational requirements, so the plane you catch could be different when you leave.

Depending on your ticket type, a fee may apply if you cancel or reschedule your booking more than 24 hours after it’s been confirmed. To find flexible fares, select our “Changes included” and “No cancel fee” boxes when looking for flights. To learn more about modifying or canceling your reservation, visit “Trips,” select your flight and tick “Manage Booking.”