How long is the flight from Portland to Washington, D.C. Dulles Intl Airport?

Airlines like Alaska Airlines and Delta fly from Portland to Washington, D.C. Dulles Intl Airport in about 7h 19m. The time it takes to get you to your destination can typically vary by up to 2h 22m. Airlines will cover a distance of 2320 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

What are the cheapest airlines flying from Portland to Washington, D.C. Dulles Intl Airport round-trip?

Cheapflights users have booked flights from Portland to Washington, D.C. Dulles Intl Airport round-trip from $138. Other airlines that can offer you cheap pricing are Alaska Airlines, from $223, and United Airlines, from $297. Delta is currently priced 68% below the average price you’ll pay for this route.

What are the cheapest airlines to fly from Portland to Washington, D.C. Dulles Intl Airport one-way?

The cheapest airlines for a one-way flight from Portland to Washington, D.C. Dulles Intl Airport are Delta ($128), Alaska Airlines ($138), and Southwest ($158).

Weekly flight availability from Portland to Washington, D.C. Dulles Intl Airport

The most flights from PDX to IAD are scheduled on a Monday (2 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (2 on average).

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 2.6 in.

If weather is an important factor for your trip to Washington, D.C. Dulles Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

What are the cheapest flights from Portland to Washington, D.C. Dulles Intl Airport?

While on average a flight from Portland to Washington, D.C. Dulles Intl Airport is generally $1,695, our data shows the cheapest flight currently is $123. When looking at the most popular route, (Portland - Washington, D.C. Dulles Intl), you can expect to pay $411 for that flight.

What are the most popular airlines that fly from Portland to Washington, D.C. Dulles Intl Airport?

United Airlines, Delta and Alaska Airlines are the most popular airlines when flying from Portland to Washington, D.C. Dulles Intl Airport.

Most accurate provider : When it comes to deals on Portland-Washington, D.C. Dulles Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Portland-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Portland-Washington, D.C. Dulles Intl Airport flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Portland-Washington, D.C. Dulles Intl Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Portland-Washington, D.C. Dulles Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

What airport do you fly from for flights from Portland to Washington, D.C. Dulles Intl?

For a flight from Portland to Washington, D.C. Dulles Intl, you will be flying from Portland. Portland (PDX) is just 6.0 mi from the center of the city. Portland is the only Portland airport and it handles 2 outbound flights to Washington, D.C. Dulles Intl per day. 3 airlines have flights to Washington, D.C. Dulles Intl from Portland on a regular basis.

Can I find deals for flights from Portland to Dulles Intl that include hotel bookings?

Yes. In addition to deals on Portland to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Portland to Dulles Intl?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to Dulles Intl.

Can I find deals for business class flights from Portland to Dulles Intl?

Yes. Cheapflights offers flight deals from Portland to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$170+ Cheap Flights from Portland to Washington, D.C. Dulles Intl Airport

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Cheapflights Tip: The best prices from Portland to Washington, D.C. Dulles Intl are usually found in January or February, booked 81 days in advance, depart on a Thursday or Wednesday and return on a Wednesday

Cheap flight deals from Portland to Dulles Intl

Cheapest

Best

Last-minute

One-way

Cheapest flights from Portland to Dulles Intl
Explore the most affordable flight options available from Portland to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 31, 2026.

Sat 9/2612:24 pm -

1 stop14h 56m

Sat 10/36:00 am -

1 stop8h 36m

Deal found 8/26

$330

Mon 10/1912:25 pm -

1 stop14h 55m

Fri 10/236:00 am -

1 stop8h 40m

Deal found 8/28

$332

Sat 9/1912:24 pm -

1 stop14h 56m

Sat 9/266:00 am -

1 stop8h 36m

Deal found 8/28

$336

Mon 10/1212:25 pm -

1 stop14h 55m

Fri 10/166:00 am -

1 stop8h 40m

Deal found 8/26

$365

Mon 10/1912:25 pm -

1 stop14h 55m

Mon 10/266:00 am -

1 stop8h 40m

Deal found 8/27

$366

Sat 9/1212:24 pm -

1 stop14h 56m

Sat 9/196:00 am -

1 stop8h 36m

Deal found 8/27

$370

Fri 9/1112:39 pm -

1 stop14h 41m

Sat 9/196:00 am -

1 stop8h 36m

Deal found 8/27

$379

Fri 9/2511:48 am -

1 stop9h 11m

Sat 9/266:00 am -

1 stop8h 36m

Deal found 8/26

$383

Mon 9/1412:39 pm -

1 stop14h 41m

Sat 9/196:00 am -

1 stop8h 36m

Deal found 8/26

$384

Thu 10/1512:11 pm -

1 stop15h 09m

Mon 10/196:00 am -

1 stop8h 40m

Deal found 8/27

$386

Best flights from Portland to Dulles Intl
Discover carefully curated flight deals from Portland to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 31, 2026.

Thu 2/116:07 am -

1 stop7h 19m

Sun 2/145:38 pm -

1 stop8h 06m

Deal found 8/26

$427

Thu 2/1111:10 am -

1 stop9h 41m

Sun 2/147:15 am -

1 stop8h 24m

Deal found 8/27

$447

Fri 10/308:30 am -

Nonstop4h 52m

Mon 11/25:19 pm -

Nonstop5h 56m

Deal found 8/30

$495

Fri 9/253:03 pm -

1 stop24h 11m

Thu 10/17:00 am -

1 stop9h 37m

Deal found 8/27

$442

Sun 10/410:00 pm -

1 stop10h 45m

Sat 10/106:13 am -

1 stop8h 50m

Deal found 8/29

$447

Thu 10/111:48 am -

1 stop9h 11m

Wed 10/77:02 am -

1 stop9h 22m

Deal found 8/28

$447

Fri 9/1811:10 pm -

1 stop9h 23m

Wed 9/237:25 am -

1 stop10h 16m

Deal found 8/26

$447

Thu 10/158:25 am -

Nonstop5h 02m

Wed 10/283:15 pm -

1 stop10h 12m

Deal found 8/28

$501

Sun 10/1810:15 pm -

1 stop10h 35m

Sun 10/256:05 am -

1 stop7h 36m

Deal found 8/27

$447

Thu 9/248:25 am -

Nonstop5h 02m

Sun 9/276:35 am -

1 stop8h 30m

Deal found 8/29

$505

Wed 10/1412:29 pm -

1 stop7h 20m

Mon 10/1912:30 pm -

1 stop11h 20m

Deal found 8/26

$447

Last-minute flights from Portland to Dulles Intl
Discover last-minute flight deals from Portland to Dulles Intl. Data last updated August 31, 2026 and is based on user searches.

Fri 9/1112:39 pm -

1 stop14h 41m

Sat 9/196:00 am -

1 stop8h 36m

Deal found 8/27

$379

Sat 9/1212:24 pm -

1 stop14h 56m

Sat 9/196:00 am -

1 stop8h 36m

Deal found 8/27

$370

Mon 9/1412:39 pm -

1 stop14h 41m

Sat 9/196:00 am -

1 stop8h 36m

Deal found 8/26

$384

Mon 9/1412:39 pm -

1 stop14h 41m

Mon 9/216:00 am -

1 stop8h 54m

Deal found 8/26

$392

Thu 9/173:00 pm -

1 stop11h 40m

Mon 9/216:00 am -

1 stop8h 54m

Deal found 8/26

$396

Fri 9/1812:39 pm -

1 stop14h 41m

Mon 9/216:00 am -

1 stop8h 54m

Deal found 8/26

$388

Sat 9/1912:24 pm -

1 stop14h 56m

Sat 9/266:00 am -

1 stop8h 36m

Deal found 8/28

$336

Sun 9/2012:24 pm -

1 stop14h 56m

Sat 9/266:00 am -

1 stop8h 36m

Deal found 8/30

$389

Fri 9/2511:48 am -

1 stop9h 11m

Sat 9/266:00 am -

1 stop8h 36m

Deal found 8/26

$383

Sat 9/2612:24 pm -

1 stop14h 56m

Sat 10/36:00 am -

1 stop8h 36m

Deal found 8/26

$330

One-way flights from Portland to Dulles Intl
Search for one-way flight options from Portland to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated August 31, 2026.

Tue 10/1311:49 am -

2 stops26h 24m

Deal found 8/27

$170

Fri 10/212:38 pm -

2 stops17h 00m

Deal found 8/29

$172

Mon 10/511:02 am -

2 stops20h 15m

Deal found 8/27

$173

Mon 11/212:31 pm -

2 stops32h 12m

Deal found 8/26

$176

Fri 10/3012:31 pm -

2 stops18h 50m

Deal found 8/27

$178

Mon 10/1211:06 am -

2 stops27h 07m

Deal found 8/27

$179

Sun 10/411:02 am -

2 stops20h 15m

Deal found 8/27

$180

Sat 9/1912:24 pm -

1 stop14h 56m

Deal found 8/29

$191

Thu 9/2411:02 am -

2 stops34h 08m

Deal found 8/26

$192

Mon 9/2112:39 pm -

1 stop14h 41m

Deal found 8/30

$193

Thu 10/812:11 pm -

1 stop15h 09m

Deal found 8/27

$196

Find flight deals from Portland to Dulles Intl

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$330 (Trip.com)
One-way from	$170 (Kiwi.com)
Popular in	June
Cheapest in	January
Average price	$477
Good round-trip deal	$477 or less
Good one-way deal	$261 or less

Provider with most accurate pricing for Portland-Washington, D.C. Dulles Intl flight deals.

Search Deals

Provider most trusted by Cheapflights users for Portland-Washington, D.C. Dulles Intl flights.

Search Deals

From Portland to Washington, D.C. Dulles Intl

Search Deals

One-way flight from Portland to Washington, D.C. Dulles Intl

Search Deals

Highest demand for flights based on searches. 16% potential increase in price ($87 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in August 2026

Search Deals

Price to beat on a round-trip flight from Portland to Washington, D.C. Dulles Intl.

Search Deals

Price to beat on a one-way flight from Portland to Washington, D.C. Dulles Intl.

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from Portland to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandWashington, D.C.

PDX Portland - IAD Washington, D.C. Dulles Intl

PDXIAD

Portland

Thu 2/11

6:07 am-4:26 pm

1 stop7h 19m

Washington, D.C. Dulles Intl

Sun 2/14

5:38 pm-10:44 pm

1 stop8h 06m

$427

PortlandWashington, D.C.

PDX Portland - IAD Washington, D.C. Dulles Intl

PDXIAD

Portland

Fri 9/25

3:03 pm-6:14 pm

1 stop24h 11m

Washington, D.C. Dulles Intl

Thu 10/1

7:00 am-1:37 pm

1 stop9h 37m

$442

PortlandWashington, D.C.

PDX Portland - IAD Washington, D.C. Dulles Intl

PDXIAD

Portland

Thu 2/11

11:10 am-11:51 pm

1 stop9h 41m

Washington, D.C. Dulles Intl

Sun 2/14

7:15 am-12:39 pm

1 stop8h 24m

$447

PortlandWashington, D.C.

PDX Portland - IAD Washington, D.C. Dulles Intl

PDXIAD

Portland

Sun 10/4

10:00 pm-11:45 am

1 stop10h 45m

Washington, D.C. Dulles Intl

Sat 10/10

6:13 am-12:03 pm

1 stop8h 50m

$447

PortlandWashington, D.C.

PDX Portland - IAD Washington, D.C. Dulles Intl

PDXIAD

Portland

Thu 10/1

11:48 am-11:59 pm

1 stop9h 11m

Washington, D.C. Dulles Intl

Wed 10/7

7:02 am-1:24 pm

1 stop9h 22m

$447

PortlandWashington, D.C.

PDX Portland - IAD Washington, D.C. Dulles Intl

PDXIAD

Portland

Fri 9/18

11:10 pm-11:33 am

1 stop9h 23m

Washington, D.C. Dulles Intl

Wed 9/23

7:25 am-2:41 pm

1 stop10h 16m

$447

PortlandWashington, D.C.

PDX Portland - IAD Washington, D.C. Dulles Intl

PDXIAD

Portland

Sun 10/18

10:15 pm-11:50 am

1 stop10h 35m

Washington, D.C. Dulles Intl

Sun 10/25

6:05 am-10:41 am

1 stop7h 36m

$447

PortlandWashington, D.C.

PDX Portland - IAD Washington, D.C. Dulles Intl

PDXIAD

Portland

Wed 10/14

12:29 pm-10:49 pm

1 stop7h 20m

Washington, D.C. Dulles Intl

Mon 10/19

12:30 pm-8:50 pm

1 stop11h 20m

$447

Quickest round-trip

PortlandWashington, D.C.

PDX Portland - IAD Washington, D.C. Dulles Intl

PDXIAD

Portland

Fri 10/30

8:30 am-4:22 pm

Nonstop4h 52m

Washington, D.C. Dulles Intl

Mon 11/2

5:19 pm-8:15 pm

Nonstop5h 56m

$495

PortlandWashington, D.C.

PDX Portland - IAD Washington, D.C. Dulles Intl

PDXIAD

Portland

Thu 10/15

8:25 am-4:27 pm

Nonstop5h 02m

Washington, D.C. Dulles Intl

Wed 10/28

3:15 pm-10:27 pm

1 stop10h 12m

$501

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/29

Showing 1-10 of 23 resultsSorted by cheapest first

Compare providers for flights from Portland to Dulles Intl

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Portland to Dulles Intl in August.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on Portland-Washington, D.C. Dulles Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Portland-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Portland-Washington, D.C. Dulles Intl Airport flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Portland-Washington, D.C. Dulles Intl Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Portland-Washington, D.C. Dulles Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Portland to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Portland with our price prediction graph.

PDX-IAD

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Portland to Washington, D.C. Dulles Intl Airport

Prices

Airlines

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

To ensure you get the cheapest price possible for a flight from Portland to Washington, D.C. Dulles Intl Airport, you should look to book at least 80 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, January is the cheapest month in which you can book a flight from Portland to Washington, D.C. Dulles Intl Airport (average of $316). Flying from Portland to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $557). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from PDX to IAD?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Portland to Washington, D.C. Dulles Intl Airport as you normally would.

How much does it cost to fly round-trip from Portland to Washington, D.C. Dulles Intl Airport?

Airfare is below average for this route at the moment.

Portland to Washington, D.C. Dulles Intl Airport flights typically cost between $430 and $565 in October.
The cheapest round-trip price found within the last 5 days was $332 on Frontier (Oct 19-Oct 23).

Reviews of airlines servicing Dulles Intl

Read through reviews of airlines operating flights from Portland to Washington, D.C. Dulles Intl Airport, such as Alaska Airlines,Delta, andUnited Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

7.9

Good

12,864 reviews

Reviews

1 / 20

8.0

Excellent

Anonymous,Nov 2025

PDX - BNA

My family especially liked the leg room and comfortable seats.

Alaska Airlines

7.9

Good

12,864 reviews

Alaska Airlines

7.9

Good

12,864 reviews

Reviews

1 / 20

8.0

Excellent

Anonymous,Nov 2025

PDX - BNA

My family especially liked the leg room and comfortable seats.

Delta

7.8

Good

8,535 reviews

Alaska Airlines

7.9

Good

12,864 reviews

Reviews

1 / 20

8.0

Excellent

Anonymous,Nov 2025

PDX - BNA

My family especially liked the leg room and comfortable seats.

United Airlines

7.4

Good

10,148 reviews

Alaska Airlines

7.9

Good

12,864 reviews

Reviews

1 / 20

8.0

Excellent

Anonymous,Nov 2025

PDX - BNA

My family especially liked the leg room and comfortable seats.

Related info for your journey

What airport do you fly from for flights from Portland to Washington, D.C. Dulles Intl?
For a flight from Portland to Washington, D.C. Dulles Intl, you will be flying from Portland. Portland (PDX) is just 6.0 mi from the center of the city. Portland is the only Portland airport and it handles 2 outbound flights to Washington, D.C. Dulles Intl per day. 3 airlines have flights to Washington, D.C. Dulles Intl from Portland on a regular basis.
How long is the flight from Portland to Washington, D.C. Dulles Intl Airport?
Airlines like Alaska Airlines and Delta fly from Portland to Washington, D.C. Dulles Intl Airport in about 7h 19m. The time it takes to get you to your destination can typically vary by up to 2h 22m. Airlines will cover a distance of 2320 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.
What are the cheapest airlines flying from Portland to Washington, D.C. Dulles Intl Airport round-trip?
Cheapflights users have booked flights from Portland to Washington, D.C. Dulles Intl Airport round-trip from $138. Other airlines that can offer you cheap pricing are Alaska Airlines, from $223, and United Airlines, from $297. Delta is currently priced 68% below the average price you’ll pay for this route.
What are the cheapest airlines to fly from Portland to Washington, D.C. Dulles Intl Airport one-way?
The cheapest airlines for a one-way flight from Portland to Washington, D.C. Dulles Intl Airport are Delta ($128), Alaska Airlines ($138), and Southwest ($158).
What are the cheapest flights from Portland to Washington, D.C. Dulles Intl Airport?
While on average a flight from Portland to Washington, D.C. Dulles Intl Airport is generally $1,695, our data shows the cheapest flight currently is $123. When looking at the most popular route, (Portland - Washington, D.C. Dulles Intl), you can expect to pay $411 for that flight.
Can I find deals for flights from Portland to Dulles Intl that include hotel bookings?
Yes. In addition to deals on Portland to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Portland to Dulles Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to Dulles Intl.
Can I find deals for business class flights from Portland to Dulles Intl?
Yes. Cheapflights offers flight deals from Portland to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Portland to Washington, D.C. Dulles Intl Airport?
Currently, January is the cheapest month in which you can book a flight from Portland to Washington, D.C. Dulles Intl Airport (average of $316). Flying from Portland to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $557). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Top 3 airlines flying from Portland to Dulles Intl

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest$138	Average$392	FlexibilityNo cancel fee	On-timeN/A
Alaska Airlines	Cheapest$223	Average$430	FlexibilityNo cancel fee	On-time75%
United Airlines	Cheapest$297	Average$481	FlexibilityNo cancel fee	On-time69%

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$170+ Cheap flights from Portland (PDX) to Dulles Intl (IAD)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/13. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Portland to Dulles Intl with Cheapflights

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Cheap flight deals from Portland to Dulles Intl

Cheapest flights from Portland to Dulles IntlExplore the most affordable flight options available from Portland to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 31, 2026.

Explore the most affordable flight options available from Portland to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 31, 2026.

Best flights from Portland to Dulles IntlDiscover carefully curated flight deals from Portland to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 31, 2026.

Discover carefully curated flight deals from Portland to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 31, 2026.

Last-minute flights from Portland to Dulles IntlDiscover last-minute flight deals from Portland to Dulles Intl. Data last updated August 31, 2026 and is based on user searches.

Discover last-minute flight deals from Portland to Dulles Intl. Data last updated August 31, 2026 and is based on user searches.

One-way flights from Portland to Dulles IntlSearch for one-way flight options from Portland to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated August 31, 2026.

Search for one-way flight options from Portland to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated August 31, 2026.

Find flight deals from Portland to Dulles Intl

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Cheapflights Fare Finder

Use the filters below to find and compare flights from Portland to Washington, D.C. Dulles Intl Airport that are best for you.

Compare providers for flights from Portland to Dulles Intl

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Portland to Dulles Intl in August.

Best time to book a flight from Portland to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Portland with our price prediction graph.

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

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

What is the cheapest time of day to fly from PDX to IAD?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Portland to Washington, D.C. Dulles Intl Airport as you normally would.

How much does it cost to fly round-trip from Portland to Washington, D.C. Dulles Intl Airport?

Airfare is below average for this route at the moment.

Portland to Washington, D.C. Dulles Intl Airport flights typically cost between $430 and $565 in October.The cheapest round-trip price found within the last 5 days was $332 on Frontier (Oct 19-Oct 23).

Weekly flight availability from Portland to Washington, D.C. Dulles Intl Airport

The most flights from PDX to IAD are scheduled on a Monday (2 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (2 on average).

Reviews of airlines servicing Dulles Intl

Read through reviews of airlines operating flights from Portland to Washington, D.C. Dulles Intl Airport, such as Alaska Airlines,Delta, andUnited Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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How long is the flight from Portland to Washington, D.C. Dulles Intl Airport?

What are the cheapest airlines flying from Portland to Washington, D.C. Dulles Intl Airport round-trip?

What are the cheapest airlines to fly from Portland to Washington, D.C. Dulles Intl Airport one-way?

What are the cheapest flights from Portland to Washington, D.C. Dulles Intl Airport?

Can I find deals for flights from Portland to Dulles Intl that include hotel bookings?

How can I find direct flights from Portland to Dulles Intl?

Can I find deals for business class flights from Portland to Dulles Intl?

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

Traveling to a place near Washington, D.C. Dulles Intl Airport?

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Alternative routes for Portland to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Dulles Intl by adding a car rental and/or hotel reservation to your travel itinerary.

Other flights to Dulles Intl

Explore flights to Dulles Intl departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on August 31, 2026.

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Portland and Dulles Intl flights

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Other flights from Portland

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Top 3 airlines flying from Portland to Dulles Intl

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Cheapest flights from Portland to Dulles Intl
Explore the most affordable flight options available from Portland to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 31, 2026.

Best flights from Portland to Dulles Intl
Discover carefully curated flight deals from Portland to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 31, 2026.

Last-minute flights from Portland to Dulles Intl
Discover last-minute flight deals from Portland to Dulles Intl. Data last updated August 31, 2026 and is based on user searches.

One-way flights from Portland to Dulles Intl
Search for one-way flight options from Portland to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated August 31, 2026.

Portland to Washington, D.C. Dulles Intl Airport flights typically cost between $430 and $565 in October.
The cheapest round-trip price found within the last 5 days was $332 on Frontier (Oct 19-Oct 23).