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Dulles Intl

$151+ 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 6/19. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — IAD
May 24 — May 311
Sun 5/24
Sun 5/31
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

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

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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 Friday or Wednesday 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 April 24, 2026.

This Frontier deal was found by Cheapflights users on 4/23. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/296:19 pm
PDX
-
IAD
1 stop11h 06m
Frontier
Thu 7/29:55 am
IAD
-
PDX
1 stop10h 29m
Frontier
Deal found 4/23$354
This Expedia deal was found by Cheapflights users on 4/20. 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 6/226:19 pm
PDX
-
IAD
1 stop11h 06m
Frontier
Fri 6/269:55 am
IAD
-
PDX
1 stop10h 29m
Frontier
Deal found 4/20$355
This American Airlines deal was found by Cheapflights users on 4/23. 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.
Tue 5/2610:59 pm
PDX
-
IAD
2 stops10h 37m
American Airlines
Sat 5/306:20 am
IAD
-
PDX
2 stops11h 15m
American Airlines
Deal found 4/23$359
This American Airlines deal was found by Cheapflights users on 4/22. 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 5/239:57 pm
PDX
-
IAD
1 stop7h 53m
American Airlines
Sat 5/306:20 am
IAD
-
PDX
2 stops11h 15m
American Airlines
Deal found 4/22$364
This American Airlines deal was found by Cheapflights users on 4/23. 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.
Wed 5/2010:23 pm
PDX
-
IAD
1 stop7h 37m
American Airlines
Sat 9/52:53 pm
IAD
-
PDX
1 stop9h 43m
American Airlines
Deal found 4/23$367
This American Airlines deal was found by Cheapflights users on 4/22. 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.
Fri 5/1511:47 pm
PDX
-
IAD
2 stops12h 04m
American Airlines
Thu 5/281:06 pm
IAD
-
PDX
2 stops11h 45m
American Airlines
Deal found 4/22$370
This American Airlines deal was found by Cheapflights users on 4/23. 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.
Thu 6/410:40 pm
PDX
-
IAD
2 stops10h 56m
American Airlines
Tue 6/97:24 pm
IAD
-
PDX
1 stop8h 26m
American Airlines
Deal found 4/23$372
This Delta deal was found by Cheapflights users on 4/20. 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.
Wed 6/35:51 pm
PDX
-
IAD
2 stops14h 27m
Delta
Tue 6/96:00 am
IAD
-
PDX
1 stop7h 41m
Delta
Deal found 4/20$375
This United Airlines deal was found by Cheapflights users on 4/23. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/411:40 pm
PDX
-
IAD
1 stop11h 28m
United Airlines
Fri 6/55:40 pm
IAD
-
PDX
Nonstop5h 39m
United Airlines
Deal found 4/23$376
This American Airlines deal was found by Cheapflights users on 4/21. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/1310:23 pm
PDX
-
IAD
1 stop7h 26m
American Airlines
Wed 5/277:24 pm
IAD
-
PDX
1 stop8h 26m
American Airlines
Deal found 4/21$378
This Alaska Airlines deal was found by Cheapflights users on 4/20. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/911:45 am
PDX
-
IAD
1 stop9h 14m
Alaska Airlines
Tue 9/157:00 am
IAD
-
PDX
2 stops12h 26m
Alaska Airlines
Deal found 4/20$379
This American Airlines deal was found by Cheapflights users on 4/23. 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.
Fri 5/2911:20 am
PDX
-
IAD
2 stops9h 53m
American Airlines
Mon 6/16:10 am
IAD
-
PDX
1 stop11h 47m
American Airlines
Deal found 4/23$382

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 April 24, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$355
(Expedia)

One-way from

$151
(Priceline)

Popular in

June

Cheapest in

January

Average price

$457

Good round-trip deal

$469 or less

Good one-way deal

$278 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. 9% potential increase in price ($46 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 April 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 April 24, 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

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Mon 6/29

11:15 pm-10:20 am

1 stop8h 05m

Washington, D.C. Dulles Intl

Tue 7/7

7:00 am-11:43 am

1 stop7h 43m

$388

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Tue 6/2

1:35 pm-11:39 pm

1 stop7h 04m

Washington, D.C. Dulles Intl

Thu 6/4

5:21 pm-10:02 pm

1 stop7h 41m

$388

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Fri 5/29

12:20 pm-12:15 am

1 stop8h 55m

Washington, D.C. Dulles Intl

Mon 6/1

7:00 am-11:37 am

1 stop7h 37m

$388

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Mon 6/8

11:15 pm-10:20 am

1 stop8h 05m

Washington, D.C. Dulles Intl

Sat 6/13

6:00 am-10:41 am

1 stop7h 41m

$438

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Fri 6/26

12:31 am-10:52 am

1 stop7h 21m

Washington, D.C. Dulles Intl

Sat 7/4

6:00 am-10:41 am

1 stop7h 41m

$438

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Sat 6/27

11:30 pm-7:32 am

Nonstop5h 02m

Washington, D.C. Dulles Intl

Mon 7/6

6:10 am-11:38 am

1 stop8h 28m

$467

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Wed 5/20

8:04 am-4:16 pm

Nonstop5h 12m

Washington, D.C. Dulles Intl

Sat 9/5

2:43 pm-8:55 pm

1 stop9h 12m

$467
Quickest round-trip

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Wed 6/3

11:30 pm-7:32 am

Nonstop5h 02m

Washington, D.C. Dulles Intl

Mon 6/8

5:38 pm-10:30 pm

1 stop7h 52m

$467

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Wed 6/17

11:30 pm-7:32 am

Nonstop5h 02m

Washington, D.C. Dulles Intl

Sun 6/21

6:10 am-11:38 am

1 stop8h 28m

$482

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Mon 6/8

5:46 pm-7:34 am

1 stop10h 48m

Washington, D.C. Dulles Intl

Fri 6/12

6:14 pm-11:30 pm

1 stop8h 16m

$495

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/20

Showing 1-10 of 24 resultsSorted by cheapest first
1
2
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 April.
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?

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 $296). Flying from Portland to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $502). 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 April 24, 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?

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 April 24, 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
4,334 reviews

Comfort

8.0

Crew

8.6

Overall

8.0

Boarding

8.1

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
8.0
Very good
4,334 reviews
Southwest
8.0
Very good
4,334 reviews

Comfort

8.0

Crew

8.6

Overall

8.0

Boarding

8.1

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Alaska Airlines
7.9
Good
12,280 reviews
Southwest
8.0
Very good
4,334 reviews

Comfort

8.0

Crew

8.6

Overall

8.0

Boarding

8.1

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Delta
7.9
Good
8,451 reviews
Southwest
8.0
Very good
4,334 reviews

Comfort

8.0

Crew

8.6

Overall

8.0

Boarding

8.1

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
United Airlines
7.4
Good
9,643 reviews
Southwest
8.0
Very good
4,334 reviews

Comfort

8.0

Crew

8.6

Overall

8.0

Boarding

8.1

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

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 2 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 fly from Portland to Washington, D.C. Dulles Intl Airport in about 8h 05m. The time it takes to get you to your destination can typically vary by up to . Airlines will cover a distance of 2320 mi.

  • 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 67% 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 American Airlines ($108), Delta ($128), and Alaska Airlines ($138).

  • 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 $565, our data shows the cheapest flight currently is $165. When looking at the most popular route, (Portland - Washington, D.C. Dulles Intl), you can expect to pay $305 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 $296). Flying from Portland to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $502). 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
Owings Mills
Springfield
Arlington
Woodbridge
Silver Spring
Herndon
Rockville
Hyattsville
Fredericksburg
Hanover
Laurel
Manassas
Largo
Upper Marlboro
Waldorf
Bowie
Clinton
Hunt Valley

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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 April 24, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$138Average$376FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$253Average$436FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$297Average$457FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$336Average$381FlexibilityNo cancel feeOn-time63%

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