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Dulles Intl

$177+ 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 10/2. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — IAD
Aug 22 — Aug 291
Sat 8/22
Sat 8/29
1 adult, Economy
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Find cheap flights from Portland to Dulles Intl with Cheapflights

1. Tell us where you want to go

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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 Wednesday or Thursday and return on a Wednesday

Cheap flight deals from Portland to Dulles Intl

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 July 23, 2026.

This Kiwi.com deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/105:49 pm
PDX
-
IAD
1 stop11h 31m
Frontier
Thu 8/137:48 am
IAD
-
PDX
2 stops36h 06m
Frontier
Deal found 7/20$387
This Expedia deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/105:49 pm
PDX
-
IAD
1 stop11h 31m
Multiple Airlines
Thu 8/137:53 pm
IAD
-
PDX
1 stop16h 36m
Multiple Airlines
Deal found 7/20$389
This Kiwi.com deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/168:25 am
PDX
-
IAD
1 stop25h 44m
Multiple Airlines
Mon 10/199:16 pm
IAD
-
PDX
2 stops22h 19m
Multiple Airlines
Deal found 7/21$395
This Delta deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2210:55 pm
PDX
-
IAD
1 stop7h 25m
Delta
Wed 8/267:10 am
IAD
-
PDX
1 stop7h 35m
Delta
Deal found 7/20$397
This Delta deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/1410:35 pm
PDX
-
IAD
1 stop10h 14m
Delta
Sun 8/236:49 pm
IAD
-
PDX
1 stop7h 31m
Delta
Deal found 7/20$398
This Kiwi.com deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/175:49 pm
PDX
-
IAD
2 stops13h 18m
Frontier
Mon 8/248:59 am
IAD
-
PDX
1 stop11h 22m
Frontier
Deal found 7/20$399
This Kiwi.com deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/2412:20 pm
PDX
-
IAD
2 stops25h 54m
Frontier
Fri 9/48:59 am
IAD
-
PDX
1 stop11h 22m
Frontier
Deal found 7/20$401
This American Airlines deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/105:20 am
PDX
-
IAD
1 stop10h 03m
American Airlines
Tue 10/133:08 pm
IAD
-
PDX
1 stop9h 03m
American Airlines
Deal found 7/23$402
This Delta deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/1410:35 pm
PDX
-
IAD
1 stop10h 14m
Delta
Fri 8/216:00 am
IAD
-
PDX
1 stop9h 58m
Delta
Deal found 7/23$403
This Travelocity deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/287:30 am
PDX
-
IAD
2 stops13h 29m
Alaska Airlines
Sat 10/317:02 am
IAD
-
PDX
1 stop9h 22m
Alaska Airlines
Deal found 7/20$405
This United Airlines deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/18:25 am
PDX
-
IAD
Nonstop5h 01m
United Airlines
Tue 9/81:13 pm
IAD
-
PDX
1 stop9h 05m
United Airlines
Deal found 7/21$407

Find flight deals from Portland to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PDX) to Dulles Intl (IAD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 23, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$387
(Kiwi.com)

One-way from

$177
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$507

Good round-trip deal

$496 or less

Good one-way deal

$253 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. 14% potential increase in price ($77 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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

 
Customize your flight search to find flights from Portland to Dulles Intl that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 23, 2026.
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
Quickest round-trip

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Thu 8/20

8:25 am-4:26 pm

Nonstop5h 01m

Washington, D.C. Dulles Intl

Mon 8/24

5:33 pm-8:10 pm

Nonstop5h 37m

$417

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Thu 8/20

8:25 am-4:26 pm

Nonstop5h 01m

Washington, D.C. Dulles Intl

Sun 8/23

5:33 pm-8:10 pm

Nonstop5h 37m

$439

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Mon 8/17

8:25 am-4:26 pm

Nonstop5h 01m

Washington, D.C. Dulles Intl

Mon 8/24

6:42 am-12:00 pm

1 stop8h 18m

$442

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Sat 10/24

8:25 am-4:27 pm

Nonstop5h 02m

Washington, D.C. Dulles Intl

Fri 10/30

5:33 pm-8:28 pm

Nonstop5h 55m

$447

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Tue 9/15

10:57 pm-9:09 am

1 stop7h 12m

Washington, D.C. Dulles Intl

Sun 9/20

6:10 am-10:49 am

1 stop7h 39m

$453

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Fri 10/9

8:25 am-4:27 pm

Nonstop5h 02m

Washington, D.C. Dulles Intl

Wed 10/14

2:47 pm-9:00 pm

1 stop9h 13m

$457

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Wed 9/23

7:15 pm-7:00 am

1 stop8h 45m

Washington, D.C. Dulles Intl

Tue 9/29

5:30 pm-8:10 pm

Nonstop5h 40m

$467

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Fri 8/7

7:00 am-6:33 pm

1 stop8h 33m

Washington, D.C. Dulles Intl

Mon 8/10

5:25 pm-10:09 pm

1 stop7h 44m

$491

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Wed 10/7

6:09 am-4:30 pm

1 stop7h 21m

Washington, D.C. Dulles Intl

Wed 10/7

7:24 pm-4:51 pm

1 stop24h 27m

$495

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Mon 8/10

10:35 pm-11:49 am

1 stop10h 14m

Washington, D.C. Dulles Intl

Wed 8/19

7:00 am-12:09 pm

1 stop8h 09m

$501

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/20

Showing 1-10 of 21 resultsSorted by cheapest first
1
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3

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 July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust 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.
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

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?

Find hourly flight availability from Portland to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 23, 2026.

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 typical for this route at the moment.

Portland to Washington, D.C. Dulles Intl Airport flights typically cost between $376 and $562 in August.
The cheapest round-trip price found within the last 5 days was $387 on Frontier (Aug 10-Aug 13).

Reviews of airlines servicing Dulles Intl

Get insights into the airlines that provide service to Dulles Intl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Dulles Intl. Reviews last updated July 23, 2026.
Read through reviews of airlines operating flights from Portland to Washington, D.C. Dulles Intl Airport, such as Southwest,Alaska Airlines, andDelta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,240 reviews

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

Entertainment

7.5

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.
Southwest
8.0
Very good
4,240 reviews
Southwest
8.0
Very good
4,240 reviews

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

Entertainment

7.5

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.
Alaska Airlines
7.9
Good
12,691 reviews
Southwest
8.0
Very good
4,240 reviews

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

Entertainment

7.5

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.
Delta
7.8
Good
8,479 reviews
Southwest
8.0
Very good
4,240 reviews

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

Entertainment

7.5

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.
United Airlines
7.4
Good
10,024 reviews
Southwest
8.0
Very good
4,240 reviews

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

Entertainment

7.5

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.

Related info for your journey

Find useful and relevant information for your journey from Portland to Dulles Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • 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 0 outbound flights to Washington, D.C. Dulles Intl per day. 4 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 United Airlines, Alaska Airlines, and Delta fly from Portland to Washington, D.C. Dulles Intl Airport in about 5h 01m. The time it takes to get you to your destination can typically vary by up to 8h 49m. 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 $253, 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 $436, our data shows the cheapest flight currently is $181. When looking at the most popular route, (Portland - Washington, D.C. Dulles Intl), you can expect to pay $347 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.

See more FAQs

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

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Alexandria
Tysons
Arlington
Owings Mills
Springfield
Lanham
Reston
Herndon
Rockville
Chantilly
Hyattsville
Fredericksburg
Falls Church
Hanover
Manassas
Laurel
Sterling
Clinton
Hunt Valley
Cordova

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Top 4 airlines flying from Portland to Dulles Intl

Discover the top 4 airlines that operate flights from Portland to Dulles Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 23, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$138Average$376FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$253Average$406FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$297Average$469FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$336Average$381FlexibilityNo cancel feeOn-time63%

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