Cheap flights from Washington, D.C. Dulles Intl Airport to Portland from $145

The cheapest month to fly to Portland from Washington, D.C. Dulles Intl Airport is in January. Flight prices, which tend to average around $341, are often lower during this time because this is during the off-season. If you don’t want to visit Portland in January, then you should wait until February to fly from Washington, D.C. Dulles Intl Airport, when ticket prices are also cheap, with an average price of $360.

The cheapest day to depart on your flight to Portland is on a Wednesday when prices can be found for as low as $441. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Portland is Sunday, with ticket prices averaging around $557.

The cheapest time of day to fly to Portland is in the evening when flights can be purchased for as low as $396. In the afternoon is when there is more demand to fly to Portland, so prices are often more expensive at around $481 per ticket.

Fly from Washington, D.C. Dulles Intl to Portland for the best Washington, D.C. Dulles Intl - Portland flight prices

You are more likely to see cheaper flights to Portland from Washington, D.C. Dulles Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Portland for around $453 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Portland from Washington, D.C. Dulles Intl Airport for as low as $377 on momondo.

There are 4 cabin classes available to choose from on Washington, D.C. Dulles Intl to Portland flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

You could potentially save up to 16% on your flight if you consider stops on a Washington, D.C. Dulles Intl Airport to Portland flight.

As of March 2026, prices for Washington, D.C. Dulles Intl Airport to Portland flights are approximately 16% cheaper when compared to flights at the same time last year.

Delta, Southwest, and United Airlines are the most popular carriers operating from Washington, D.C. Dulles Intl to Portland

United Airlines, Delta and Alaska Airlines are the top three most popular airlines that fly to Portland from Washington, D.C. Dulles Intl Airport according to our data. United Airlines is the first choice among our users, with 78% of people opting to fly with this airline when traveling to Portland. Keep in mind that there are 7 different airlines that fly to Portland on a routine basis, so you have a few additional options to choose from.

Minneapolis (MSP) was the most common stop: 50% of momondo users choosing 1-stop flights on this route connected there.

Flights via Minneapolis (MSP) offer the lowest average round-trip price of $345.

Flights connecting via Minneapolis (MSP) have the shortest average one-way travel time: 8h 42m.

Minneapolis (MSP) has the shortest average layover time for this route: 2h 36m.

The number of flights available between Washington, D.C. Dulles Intl Airport and Portland is 1 per day as of March 2026. The most frequent departure time is 7:00PM, with 100% of daily flights leaving in the evening.

As of March 2026, 8 flights take off from Washington, D.C. Dulles Intl Airport and land in Portland each week. The most common flight departure day for this route is Mon, with 25% of weekly flights taking off on this day.