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Dulles Intl

$145+ 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 5/1. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — IAD
Apr 1 — Apr 81
Tue 4/1
Tue 4/8
1 adult, Economy
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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 February or April, booked 26 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

Cheap 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 March 27, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$278
(Frontier)

One-way from

$145
(Frontier)

Popular in

December

Cheapest in

February

Average price

$526

Good round-trip deal

$413 or less

Good one-way deal

$224 or less
Provider with most accurate pricing for Portland-Washington, D.C. Dulles Intl flight deals.
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Provider most trusted by Cheapflights users for Portland-Washington, D.C. Dulles Intl flights.
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From Portland to Washington, D.C. Dulles Intl
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One-way flight from Portland to Washington, D.C. Dulles Intl
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Highest demand for flights based on searches. 8% potential increase in price ($47 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Price to beat on a round-trip flight from Portland to Washington, D.C. Dulles Intl.
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Price to beat on a one-way flight from Portland to Washington, D.C. Dulles Intl.
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Find 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 March 27, 2025.

This Frontier deal was found by Cheapflights users on 3/26. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/21:15 pmPDX - IAD
1 stop14h 16mFrontier
Thu 5/88:01 amIAD - PDX
1 stop10h 41mFrontier
Deal found 3/26$278
This Booking.com deal was found by Cheapflights users on 3/25. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/276:20 pmPDX - IAD
1 stop13h 17mMultiple Airlines
Fri 5/28:01 amIAD - PDX
1 stop10h 41mMultiple Airlines
Deal found 3/25$323
This United Airlines deal was found by Cheapflights users on 3/24. 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.
Tue 5/610:47 pmPDX - IAD
1 stop10h 08mUnited Airlines
Thu 5/85:18 pmIAD - PDX
Nonstop5h 44mUnited Airlines
Deal found 3/24$327
This Sun Country Air deal was found by Cheapflights users on 3/25. 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 Sun Country Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/141:20 pmPDX - IAD
1 stop19h 27mSun Country Air
Sun 5/1811:37 amIAD - PDX
1 stop25h 24mSun Country Air
Deal found 3/25$330
This Delta deal was found by Cheapflights users on 3/24. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/251:35 pmPDX - IAD
1 stop6h 56mDelta
Fri 5/28:33 pmIAD - PDX
1 stop29h 05mDelta
Deal found 3/24$346
This Alaska Airlines deal was found by Cheapflights users on 3/24. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/229:45 pmPDX - IAD
2 stops23h 13mAlaska Airlines
Tue 4/296:30 amIAD - PDX
1 stop7h 22mAlaska Airlines
Deal found 3/24$352
This Hawaiian Airlines deal was found by Cheapflights users on 3/25. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/25:50 pmPDX - IAD
1 stop8h 50mHawaiian Airlines
Tue 5/67:00 amIAD - PDX
1 stop9h 49mHawaiian Airlines
Deal found 3/25$356
This American Airlines deal was found by Cheapflights users on 3/25. 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.
Wed 4/165:31 amPDX - IAD
2 stops11h 10mAmerican Airlines
Wed 4/235:13 pmIAD - PDX
1 stop8h 34mAmerican Airlines
Deal found 3/25$362
This Southwest deal was found by Cheapflights users on 3/26. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/185:25 amPDX - IAD
2 stops14h 25mSouthwest
Mon 9/227:35 amIAD - PDX
1 stop9h 20mSouthwest
Deal found 3/26$428

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 March 27, 2025.
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

Fri 5/2

1:15 pm-6:31 am

1 stop14h 16m

Washington, D.C. Dulles Intl

Thu 5/8

8:01 am-3:42 pm

1 stop10h 41m

$278

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Sun 4/27

6:20 pm-10:37 am

1 stop13h 17m

Washington, D.C. Dulles Intl

Fri 5/2

8:01 am-3:42 pm

1 stop10h 41m

$323

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Tue 5/6

10:47 pm-11:55 am

1 stop10h 08m

Washington, D.C. Dulles Intl

Thu 5/8

5:18 pm-8:02 pm

Nonstop5h 44m

$327

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Wed 5/14

1:20 pm-11:47 am

1 stop19h 27m

Washington, D.C. Dulles Intl

Sun 5/18

11:37 am-10:01 am

1 stop25h 24m

$330

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Fri 4/25

1:35 pm-11:31 pm

1 stop6h 56m

Washington, D.C. Dulles Intl

Fri 5/2

8:33 pm-10:38 pm

1 stop29h 05m

$346

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Tue 4/22

9:45 pm-11:58 pm

2 stops23h 13m

Washington, D.C. Dulles Intl

Tue 4/29

6:30 am-10:52 am

1 stop7h 22m

$352

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Fri 5/2

5:50 pm-5:40 am

1 stop8h 50m

Washington, D.C. Dulles Intl

Tue 5/6

7:00 am-1:49 pm

1 stop9h 49m

$356

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Wed 4/16

5:31 am-7:41 pm

2 stops11h 10m

Washington, D.C. Dulles Intl

Wed 4/23

5:13 pm-10:47 pm

1 stop8h 34m

$362

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Fri 6/13

5:10 am-7:05 pm

2 stops10h 55m

Washington, D.C. Dulles Intl

Mon 6/16

5:50 pm-1:05 am

1 stop10h 15m

$452

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Thu 5/1

1:15 pm-6:31 am

1 stop14h 16m

$145

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/26

Showing 1-10 of 19 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 March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice 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 March 21, 2025.

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 26 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, August is the cheapest month in which you can book a flight from Portland to Washington, D.C. Dulles Intl Airport (average of $309). Flying from Portland to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $385). 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 March 27, 2025.

A simple way to save on the total cost of your ticket is to fly from Portland to Washington, D.C. Dulles Intl Airport at noon. If you’re flexible enough to do this you can expect to save up to 29% on your trip compared to booking a flight in the morning.

What is the cheapest day to fly from Portland to Washington, D.C. Dulles Intl Airport?

Use this chart to determine the cheapest time to fly round-trip from Portland to Dulles Intl. Price data was last updated on March 23, 2025.

Travelers seeking maximum savings on their Portland to Washington, D.C. Dulles Intl Airport flight should consider departing on Tuesday at noon when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average rainfall totals by month.

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.

Temperature in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average temperature totals by month.

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).

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 March 27, 2025.
Read through reviews of airlines operating flights from Portland to Washington, D.C., such as Southwest, Alaska Airlines and Delta. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,273 reviews

Entertainment

7.6

Food

7.1

Crew

8.6

Comfort

8.1

Overall

8.1

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Southwest
8.1
Very good
4,273 reviews
Southwest
8.1
Very good
4,273 reviews

Entertainment

7.6

Food

7.1

Crew

8.6

Comfort

8.1

Overall

8.1

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Alaska Airlines
8.0
Very good
9,792 reviews
Southwest
8.1
Very good
4,273 reviews

Entertainment

7.6

Food

7.1

Crew

8.6

Comfort

8.1

Overall

8.1

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Delta
8.0
Very good
7,895 reviews
Southwest
8.1
Very good
4,273 reviews

Entertainment

7.6

Food

7.1

Crew

8.6

Comfort

8.1

Overall

8.1

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Hawaiian Airlines
7.9
Good
2,334 reviews
Southwest
8.1
Very good
4,273 reviews

Entertainment

7.6

Food

7.1

Crew

8.6

Comfort

8.1

Overall

8.1

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
United Airlines
7.4
Good
8,603 reviews
Southwest
8.1
Very good
4,273 reviews

Entertainment

7.6

Food

7.1

Crew

8.6

Comfort

8.1

Overall

8.1

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

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. 6 airlines have flights to Washington, D.C. Dulles Intl from Portland on a regular basis.

  • 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 $278. Other airlines that can offer you cheap pricing are United Airlines, from $327, and Sun Country Air, from $330. Frontier is currently priced 48% 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 ($145), Sun Country Air ($150), and United Airlines ($159).

  • 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 $1,384, 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 $333 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, August is the cheapest month in which you can book a flight from Portland to Washington, D.C. Dulles Intl Airport (average of $309). Flying from Portland to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $385). 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 Portland?

Book flights to Portland if you plan to visit one of these locations
Arlington
Alexandria
Fairfax
Tysons
Springfield
Rockville
Woodbridge
Gaithersburg
Fredericksburg
Linthicum Heights
Silver Spring
Falls Church
Laurel
Easton
Herndon
Sterling
Bowie
Gettysburg
National Harbor
Oxon Hill

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Top 6 airlines flying from Portland to Dulles Intl

Discover the top 6 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 March 27, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$95Average$232FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$298Average$418FlexibilityNo cancel feeOn-time71%
DeltaCheapest$298Average$449FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$337Average$557FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$357Average$526FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$382Average$574FlexibilityNo cancel feeOn-time69%
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