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Dulles Intl

$139+ 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 3/9. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — IAD
Feb 25 — Mar 41
Wed 2/25
Wed 3/4
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 50 days in advance, depart on a Wednesday or Friday and return on a Saturday

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 January 26, 2026.

This Delta deal was found by Cheapflights users on 1/26. 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.
Thu 2/191:27 pm
PDX
-
IAD
1 stop6h 43m
Delta
Sun 2/227:00 am
IAD
-
PDX
1 stop8h 44m
Delta
Deal found 1/26$277
This American Airlines deal was found by Cheapflights users on 1/26. 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.
Tue 2/2411:35 pm
PDX
-
IAD
2 stops12h 04m
American Airlines
Tue 3/35:37 pm
IAD
-
PDX
1 stop8h 50m
American Airlines
Deal found 1/26$282
This American Airlines deal was found by Cheapflights users on 1/25. 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.
Thu 2/1911:35 pm
PDX
-
IAD
2 stops10h 57m
American Airlines
Sat 2/212:03 pm
IAD
-
PDX
2 stops13h 14m
American Airlines
Deal found 1/25$287
This United Airlines deal was found by Cheapflights users on 1/25. 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.
Sat 3/71:39 pm
PDX
-
IAD
1 stop8h 24m
United Airlines
Tue 3/105:26 pm
IAD
-
PDX
1 stop8h 19m
United Airlines
Deal found 1/25$294
This United Airlines deal was found by Cheapflights users on 1/25. 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.
Sun 3/811:10 pm
PDX
-
IAD
Nonstop4h 53m
United Airlines
Fri 3/137:05 pm
IAD
-
PDX
Nonstop5h 53m
United Airlines
Deal found 1/25$297
This Alaska Airlines deal was found by Cheapflights users on 1/26. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/99:32 pm
PDX
-
IAD
1 stop16h 50m
Alaska Airlines
Tue 4/146:22 pm
IAD
-
PDX
1 stop18h 27m
Alaska Airlines
Deal found 1/26$302
This United Airlines deal was found by Cheapflights users on 1/25. 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.
Sun 3/811:10 pm
PDX
-
IAD
Nonstop4h 53m
United Airlines
Thu 3/126:15 am
IAD
-
PDX
1 stop9h 18m
United Airlines
Deal found 1/25$307
This Delta deal was found by Cheapflights users on 1/26. 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.
Tue 5/512:30 am
PDX
-
IAD
1 stop8h 02m
Delta
Sat 5/96:15 am
IAD
-
PDX
1 stop9h 39m
Delta
Deal found 1/26$308
This Alaska Airlines deal was found by Cheapflights users on 1/26. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/275:46 pm
PDX
-
IAD
1 stop10h 48m
Alaska Airlines
Mon 6/16:42 pm
IAD
-
PDX
1 stop18h 04m
Alaska Airlines
Deal found 1/26$312
This United Airlines deal was found by Cheapflights users on 1/24. 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.
Thu 4/168:05 am
PDX
-
IAD
Nonstop5h 12m
United Airlines
Tue 4/215:55 pm
IAD
-
PDX
Nonstop5h 47m
United Airlines
Deal found 1/24$313
This Delta deal was found by Cheapflights users on 1/25. 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.
Thu 2/191:53 pm
PDX
-
IAD
1 stop7h 02m
Delta
Sat 2/2112:35 pm
IAD
-
PDX
1 stop9h 41m
Delta
Deal found 1/25$318

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 January 26, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$277
(Delta)

One-way from

$139
(Delta)

Popular in

July

Cheapest in

January

Average price

$317

Good round-trip deal

$459 or less

Good one-way deal

$238 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. 8% potential increase in price ($38 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 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 January 26, 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

Portland

Fly to

Dulles Intl

Route

Depart

Return

Price

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Thu 2/26

1:32 pm-11:46 pm

1 stop7h 14m

Washington, D.C. Dulles Intl

Fri 2/27

2:17 pm-8:30 pm

1 stop9h 13m

$277

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Sun 2/22

11:59 pm-11:50 am

1 stop8h 51m

Washington, D.C. Dulles Intl

Sun 3/1

6:20 am-12:38 pm

1 stop9h 18m

$277

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Tue 2/24

1:18 pm-11:19 pm

1 stop7h 01m

Washington, D.C. Dulles Intl

Tue 3/3

3:58 pm-9:15 pm

1 stop8h 17m

$277

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Fri 2/20

1:53 pm-11:55 pm

1 stop7h 02m

Washington, D.C. Dulles Intl

Mon 2/23

7:30 am-3:11 pm

1 stop10h 41m

$277

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Thu 2/19

1:18 pm-11:19 pm

1 stop7h 01m

Washington, D.C. Dulles Intl

Sun 2/22

6:20 am-12:38 pm

1 stop9h 18m

$277

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Thu 2/19

1:27 pm-11:10 pm

1 stop6h 43m

Washington, D.C. Dulles Intl

Sun 2/22

7:00 am-12:44 pm

1 stop8h 44m

$277

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Thu 2/26

6:57 pm-5:18 am

1 stop7h 21m

Washington, D.C. Dulles Intl

Sun 3/1

6:20 am-12:38 pm

1 stop9h 18m

$277

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Thu 2/19

1:53 pm-11:55 pm

1 stop7h 02m

Washington, D.C. Dulles Intl

Mon 2/23

3:42 pm-10:08 pm

1 stop9h 26m

$277

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Fri 3/6

6:57 pm-5:17 am

1 stop7h 20m

Washington, D.C. Dulles Intl

Sat 3/7

6:03 pm-12:35 am

1 stop9h 32m

$277

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Sat 2/28

7:00 am-5:00 pm

1 stop7h 00m

Washington, D.C. Dulles Intl

Mon 3/2

4:10 pm-10:59 pm

1 stop9h 49m

$277

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/25

Showing 1-10 of 21 results
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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 January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust 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?

Use this chart to determine the optimal time to book a round-trip flight from Portland to Dulles Intl. Price data was last updated on January 23, 2026.

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 50 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, September is the cheapest month in which you can book a flight from Portland to Washington, D.C. Dulles Intl Airport (average of $226). Flying from Portland to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $376). 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.

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 January 26, 2026.
Read through reviews of airlines operating flights from Portland to Washington, D.C. Dulles Intl Airport, such as Alaska Airlines, Southwest, and Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
11,792 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.0

Food

7.1

Comfort

7.8

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
Alaska Airlines
8.0
Very good
11,792 reviews
Alaska Airlines
8.0
Very good
11,792 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.0

Food

7.1

Comfort

7.8

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
Southwest
8.0
Very good
4,268 reviews
Alaska Airlines
8.0
Very good
11,792 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.0

Food

7.1

Comfort

7.8

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
Delta
7.9
Good
8,113 reviews
Alaska Airlines
8.0
Very good
11,792 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.0

Food

7.1

Comfort

7.8

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
United Airlines
7.4
Good
9,198 reviews
Alaska Airlines
8.0
Very good
11,792 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.0

Food

7.1

Comfort

7.8

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading

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 Delta and United Airlines fly from Portland to Washington, D.C. Dulles Intl Airport in about 7h 14m. The time it takes to get you to your destination can typically vary by up to 1h 37m. 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 $253. Other airlines that can offer you cheap pricing are Delta, from $277, and United Airlines, from $307. Alaska Airlines is currently priced 42% 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 Frontier ($141), Alaska Airlines ($148), and Delta ($148).

  • 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 $523, our data shows the cheapest flight currently is $168. When looking at the most popular route, (Portland - Washington, D.C. Dulles Intl), you can expect to pay $257 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, September is the cheapest month in which you can book a flight from Portland to Washington, D.C. Dulles Intl Airport (average of $226). Flying from Portland to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $376). 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
Woodbridge
Tysons
Arlington
Owings Mills
Springfield
Silver Spring
Herndon
Fredericksburg
Hanover
Linthicum Heights
Rockville
Laurel
Towson
Manassas
Largo
Bowie
McLean
Clinton
Upper Marlboro

Browse thousands of different options on Cheapflights for your next trip

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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 January 26, 2026.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$253Average$438FlexibilityNo cancel feeOn-time75%
DeltaCheapest$277Average$376FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$307Average$467FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$336Average$396FlexibilityNo cancel feeOn-time63%

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