Skyscanner home

Cheap Flights from Portland (PDX) to Washington Dulles (IAD)

Compare Portland to Washington Dulles flight deals

Find the cheapest month or even day of the year to fly to Washington Dulles

Book the best Washington Dulles fare with no extra fees

Flight deals from Portland Airport to Washington Dulles Airport

Looking for a cheap last-minute deal or the best return flight from Portland Airport to Washington Dulles Airport? If you want to travel next month, return fares start from £240. Find the lowest prices on one-way and return tickets right here.
Washington D.C..£92 per passenger.Departing Tue, 2 Jun.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Portland on Tue, 2 Jun, arriving in Washington Dulles.Price includes taxes and charges.From £92, select.
Washington D.C..£113 per passenger.Departing Sun, 31 May.One-way flight with Allegiant Air.Outbound indirect flight with Allegiant Air, departs from Portland on Sun, 31 May, arriving in Washington Dulles.Price includes taxes and charges.From £113, select.
Washington D.C..£114 per passenger.Departing Wed, 15 Apr.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Portland on Wed, 15 Apr, arriving in Washington Dulles.Price includes taxes and charges.From £114, select.
Washington D.C..£125 per passenger.Departing Wed, 15 Jul.One-way flight with Delta.Outbound indirect flight with Delta, departs from Portland on Wed, 15 Jul, arriving in Washington Dulles.Price includes taxes and charges.From £125, select.
Washington D.C..£126 per passenger.Departing Mon, 3 Aug.One-way flight with Delta.Outbound indirect flight with Delta, departs from Portland on Mon, 3 Aug, arriving in Washington Dulles.Price includes taxes and charges.From £126, select.
Washington D.C..£126 per passenger.Departing Wed, 30 Sep.One-way flight with Delta.Outbound indirect flight with Delta, departs from Portland on Wed, 30 Sep, arriving in Washington Dulles.Price includes taxes and charges.From £126, select.
Washington D.C..£130 per passenger.Departing Thu, 1 Oct.One-way flight with Alaska Airlines.Outbound indirect flight with Alaska Airlines, departs from Portland on Thu, 1 Oct, arriving in Washington Dulles.Price includes taxes and charges.From £130, select.
Washington D.C..£163 per passenger.Departing Fri, 15 Jan.One-way flight with Delta.Outbound indirect flight with Delta, departs from Portland on Fri, 15 Jan, arriving in Washington Dulles.Price includes taxes and charges.From £163, select.
Washington D.C..£185 per passenger.Departing Thu, 7 May.One-way flight with United.Outbound direct flight with United departs from Portland on Thu, 7 May, arriving in Washington Dulles.Price includes taxes and charges.From £185, select.
Washington D.C..£185 per passenger.Departing Thu, 20 Aug.One-way flight with United.Outbound direct flight with United departs from Portland on Thu, 20 Aug, arriving in Washington Dulles.Price includes taxes and charges.From £185, select.
Washington D.C..£185 per passenger.Departing Wed, 3 Jun.One-way flight with United.Outbound direct flight with United departs from Portland on Wed, 3 Jun, arriving in Washington Dulles.Price includes taxes and charges.From £185, select.
Washington D.C..£185 per passenger.Departing Fri, 3 Jul.One-way flight with United.Outbound direct flight with United departs from Portland on Fri, 3 Jul, arriving in Washington Dulles.Price includes taxes and charges.From £185, select.
Washington D.C..£186 per passenger.Departing Thu, 1 Oct.One-way flight with United.Outbound direct flight with United departs from Portland on Thu, 1 Oct, arriving in Washington Dulles.Price includes taxes and charges.From £186, select.
Washington D.C..£186 per passenger.Departing Wed, 30 Sep.One-way flight with United.Outbound direct flight with United departs from Portland on Wed, 30 Sep, arriving in Washington Dulles.Price includes taxes and charges.From £186, select.
Washington D.C..£186 per passenger.Departing Mon, 20 Apr.One-way flight with United.Outbound direct flight with United departs from Portland on Mon, 20 Apr, arriving in Washington Dulles.Price includes taxes and charges.From £186, select.

Find the cheapest month to fly from Portland to Washington Dulles

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Portland to Washington Dulles flights are currently cheapest in June.
Mar
Find prices
Apr
from £114
May
from £113
Jun
from £92
Jul
from £125
Aug
from £126
Sep
from £126
Oct
from £130
Nov
Find prices
Dec
Find prices
Jan
from £163
Feb
Find prices

Direct flights from Portland to Washington Dulles

Portland to Washington Dulles: Alternative routes

Compare routes from Portland to Washington D.C. below. You may find an airport to fly into that's cheaper, faster, or easier than Washington Dulles.

Washington Ronald Reagan

3 miles from central Washington D.C.
ClosestCheapest
from £60
Search flights

Camp Springs Andrews AFB

11 miles from central Washington D.C.
Search flights

Washington Dulles

23 miles from central Washington D.C.
from £92
Search flights

Baltimore Washington International

27 miles from central Washington D.C.
from £76
Search flights

Manassas

29 miles from central Washington D.C.
Search flights

Portland to Washington D.C.: Flight information

The things to know before you go.
Cheapest flight found£92
Cheapest month to flyJune
Average flight time4 hrs, 59 mins
Most popular airlineUnited
Average flights per week12

Finding cheap flights from Portland to Washington Dulles: Frequently asked questions

The best price we found for a return flight from Portland to Washington Dulles is £176. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
4 hours and 59 minutes is the average flight time from Portland to Washington Dulles.
United and Brussels Airlines fly direct from Portland to Washington Dulles.
As of March 2026, there are 13 flights per week flying from Portland to Washington Dulles.
The cheapest month to fly from Portland to Washington Dulles is usually June.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Portland Airport to Washington Dulles Airport on Thursday, 4 June 2026.
Yes – the average flight time is 4 hours and 59 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Washington Dulles but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Washington D.C. is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Frontier Airlines and United offer the cheapest flight tickets to Washington Dulles.

Flying from Portland International Airport (PDX) to Washington Dulles International Airport (IAD): what you need to know

  • The average length of a direct flight from Portland International Airport to Washington Dulles International Airport is 5 hours.

  • The timezone in Washington DC is UTC-4, which is three hours ahead of Portland.

  • Choose from ten weekly Portland International Airport to Washington Dulles International Airport flights. The 07:00 departure with United Airlines is the earliest available. United Airlines operates the last service of the day at 23:35.

  • For a smooth journey, turn up at the airport two hours ahead of international flights and an hour before domestic departures. This way, you can comfortably catch your PDX to IAD flight.

  • During popular months such as July, you'll want to get to the airport earlier than normal. Plan to arrive two hours before a domestic departure and four hours ahead for an international flight when you travel during a peak period in general.

  • United Airlines is your gateway to discovering Washington DC (and perhaps some other great corners of United States!). Browse the direct flights from Portland International Airport to Washington Dulles International Airport offered by this carrier.

  • Most travellers choose to fly with United Airlines on this route.

  • The carrier with the top on-time arrival performance for PDX to IAD flights is United Airlines.

  • If you want to add a stop to your trip, just uncheck 'Direct flights only' when searching for your ticket from Portland International Airport to Washington Dulles International Airport. These are the top stopovers between PDX and IAD:

    • Denver International Airport

    • Minneapolis-St. Paul International Airport

    • O'Hare International Airport

How to find the cheapest flights from Portland International Airport (PDX) to Washington Dulles International Airport (IAD)

  • £92 is the lowest price for a one-way Portland International Airport to Washington Dulles International Airport flight. A return flight starts from £176. These prices can change based on availability and demand.

  • Get cheap tickets from PDX to IAD by booking at least seven months ahead. Based on our research, that's the sweet spot for picking up a bargain.

  • Organise your trip for June. That's the cheapest month for flights from Portland International Airport to Washington Dulles International Airport. If you're flexible with your dates, use the 'Whole month' tool to see the cheapest price across each month.

  • Save time searching for cheap flights from PDX to IAD by setting up a Price Alert. You'll get an email or notification on the app when fares go down.

  • Discover the perfect flight for you with the help of the filters. To see the 'Best,' 'Cheapest' or 'Fastest' flights from Portland International Airport to Washington Dulles International Airport, use the 'Sort by' tool. You can also filter results by airline, departure and arrival times, and number of stops.

Handy information about Portland International Airport (PDX)

  • You'll find PDX at 7000 NE Airport Way.

  • 83.65% of flights leaving Portland International Airport land at their destination on schedule. With its strong on-time stats, you're unlikely to experience delays when jetting out of PDX.

  • Portland International Airport is about 12 miles from central Portland. If you're catching a cab, ride-sharing or driving from the centre, it'll take 20 minutes or so to get there, depending on the traffic.

  • You can expect a journey time of around 45 minutes when using public transport.

  • Searching for a handy hotel close to PDX? If you've booked an early flight from Portland International Airport to Washington Dulles International Airport, these accommodation options will put you moments from your check-in counter:

Arriving at Washington Dulles International Airport (IAD)

Getting from Washington Dulles International Airport (IAD) to central Washington DC

  • You'll find IAD at 1 Saarinen Circle.

  • Washington Dulles International Airport is approximately 35 miles from central Washington DC. Driving there takes about 50 minutes.

  • It typically takes 3 hours 25 minutes to get there using public transport.

When to fly to Washington Dulles International Airport (IAD)

  • It's time to plan your dates for your flight from Portland International Airport to Washington Dulles International Airport. April is the most popular month to visit Washington DC. If you like a more relaxed vibe, go in January.

  • The warmest month in Washington DC is July, with the temperature ranging between 19ºC (66ºF) and 33ºC (91ºF). Book your flights from Portland International Airport to Washington Dulles International Airport in this month if you enjoy this type of weather.

  • If you like cooler conditions, search for a cheap ticket from PDX to IAD in January. Temperatures average between -6ºC (21ºF) and 10ºC (50ºF) then.

Explore more of United States

  • You've visited Washington DC, now it's time to discover other corners of United States. Journey about 200 miles north-east to New York to tick off its must-visit sights. From Statue of Liberty to Central Park and Empire State Building, you'll have a full itinerary ahead.

  • Philadelphia is another favourite destination in United States and is around 120 miles north-east of Washington DC. No journey is complete without experiencing Liberty Bell, Independence Hall and Philadelphia Museum of Art.

Plan the rest of your trip from Portland to Washington D.C.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.