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Cheap flights from Portland to Washington, D.C. from $168

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Portland to Washington, D.C. departing on 11/17. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap round-trip flights

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Alaska Airlines Logo
9:34 pm - 5:04 pmPDX-IAD
16h 30m1 stop
Alaska Airlines Logo
6:04 pm - 12:09 amIAD-PDX
9h 05m1 stop
$296Alaska Airlines
Find Deal
Tue, Jan 6 - Tue, Jan 20
Delta Logo
12:35 am - 11:07 amPDX-IAD
7h 32m1 stop
Delta Logo
5:03 pm - 10:05 pmIAD-PDX
8h 02m1 stop
$297Delta
Find Deal
Mon, Nov 17 - Tue, Nov 18
American Airlines Logo
10:15 pm - 8:44 amPDX-IAD
7h 29m1 stop
American Airlines Logo
7:55 am - 5:28 pmIAD-PDX
12h 33m2 stops
$302American Airlines
Find Deal
Wed, Dec 3 - Wed, Dec 10
American Airlines Logo
8:35 am - 10:59 pmPDX-IAD
11h 24m2 stops
American Airlines Logo
11:25 am - 9:24 pmIAD-PDX
12h 59m2 stops
$307American Airlines
Find Deal
Wed, Dec 3 - Wed, Dec 10
United Airlines Logo
11:59 pm - 11:44 amPDX-IAD
8h 45m1 stop
United Airlines Logo
1:10 pm - 6:45 pmIAD-PDX
8h 35m1 stop
$312United Airlines
Find Deal
Thu, Dec 4 - Tue, Dec 9
Alaska Airlines Logo
10:30 am - 10:05 pmPDX-IAD
8h 35m1 stop
Alaska Airlines Logo
7:34 am - 1:50 pmIAD-PDX
9h 16m1 stop
$316Alaska Airlines
Find Deal
Sat, Dec 6 - Thu, Dec 11
Delta Logo
11:54 am - 12:12 amPDX-IAD
9h 18m1 stop
Delta Logo
5:03 pm - 10:15 pmIAD-PDX
8h 12m1 stop
$317Delta
Find Deal
Wed, Dec 10 - Mon, Dec 15
Southwest Logo
6:15 am - 5:00 pmPDX-IAD
7h 45m1 stop
Southwest Logo
9:05 am - 10:05 pmIAD-PDX
16h 00m2 stops
$328Southwest
Find Deal
Sun, Jan 11 - Wed, Jan 14
Southwest Logo
6:00 am - 9:55 pmPDX-IAD
12h 55m2 stops
Southwest Logo
9:05 am - 10:05 pmIAD-PDX
16h 00m2 stops
$333Southwest
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Mon, Jan 12 - Wed, Jan 14
United Airlines Logo
11:30 pm - 7:18 amPDX-IAD
4h 48mnonstop
United Airlines Logo
5:30 pm - 8:25 pmIAD-PDX
5h 55mnonstop
$338United Airlines
Find Deal
Thu, Apr 16 - Tue, Apr 21

Alaska Airlines flights from Portland to Washington, D.C. Dulles Intl Airport

Our best Alaska Airlines deals on Portland to Washington, D.C. Dulles Intl Airport flight tickets
Alaska Airlines
Jan 6
PDX9:34 pmPortland
16h 30m
1 stop
IAD5:04 pmWashington, D.C. Dulles Intl
Jan 20
IAD6:04 pmWashington, D.C. Dulles Intl
9h 05m
1 stop
PDX12:09 amPortland
$296
Find similar
Alaska Airlines
Dec 6
PDX10:30 amPortland
8h 35m
1 stop
IAD10:05 pmWashington, D.C. Dulles Intl
Dec 11
IAD7:34 amWashington, D.C. Dulles Intl
9h 16m
1 stop
PDX1:50 pmPortland
$316
Find similar
Alaska Airlines
Feb 9
PDX2:31 pmPortland
23h 33m
2 stops
IAD5:04 pmWashington, D.C. Dulles Intl
Feb 18
IAD7:00 amWashington, D.C. Dulles Intl
10h 23m
1 stop
PDX2:23 pmPortland
$321
Find similar

Delta flights from Portland to Washington, D.C. Dulles Intl Airport

Our best Delta deals on Portland to Washington, D.C. Dulles Intl Airport flight tickets
Delta
Nov 17
PDX12:35 amPortland
7h 32m
1 stop
IAD11:07 amWashington, D.C. Dulles Intl
Nov 18
IAD5:03 pmWashington, D.C. Dulles Intl
8h 02m
1 stop
PDX10:05 pmPortland
$297
Find similar
Delta
Dec 10
PDX11:54 amPortland
9h 18m
1 stop
IAD12:12 amWashington, D.C. Dulles Intl
Dec 15
IAD5:03 pmWashington, D.C. Dulles Intl
8h 12m
1 stop
PDX10:15 pmPortland
$317
Find similar
Delta
Nov 17
PDX2:23 pmPortland
7h 31m
1 stop
IAD12:54 amWashington, D.C. Dulles Intl
Nov 20
IAD6:03 amWashington, D.C. Dulles Intl
9h 45m
1 stop
PDX12:48 pmPortland
$337
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Portland to Washington, D.C. Dulles Intl Airport 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, momondo users made 832,500 searches. Data last updated October 29, 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

Fly to

Route

Depart

Return

Price

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Tue 1/6

9:34 pm-5:04 pm

1 stop16h 30m

Washington, D.C. Dulles Intl

Tue 1/20

6:04 pm-12:09 am

1 stop9h 05m

$296

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Mon 11/17

12:35 am-11:07 am

1 stop7h 32m

Washington, D.C. Dulles Intl

Tue 11/18

5:03 pm-10:05 pm

1 stop8h 02m

$297

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Wed 12/3

10:15 pm-8:44 am

1 stop7h 29m

Washington, D.C. Dulles Intl

Wed 12/10

7:55 am-5:28 pm

2 stops12h 33m

$302

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Wed 12/3

8:35 am-10:59 pm

2 stops11h 24m

Washington, D.C. Dulles Intl

Wed 12/10

11:25 am-9:24 pm

2 stops12h 59m

$307

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Thu 12/4

11:59 pm-11:44 am

1 stop8h 45m

Washington, D.C. Dulles Intl

Tue 12/9

1:10 pm-6:45 pm

1 stop8h 35m

$312

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Sat 12/6

10:30 am-10:05 pm

1 stop8h 35m

Washington, D.C. Dulles Intl

Thu 12/11

7:34 am-1:50 pm

1 stop9h 16m

$316

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Wed 12/10

11:54 am-12:12 am

1 stop9h 18m

Washington, D.C. Dulles Intl

Mon 12/15

5:03 pm-10:15 pm

1 stop8h 12m

$317

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Sun 1/11

6:15 am-5:00 pm

1 stop7h 45m

Washington, D.C. Dulles Intl

Wed 1/14

9:05 am-10:05 pm

2 stops16h 00m

$328

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Mon 1/12

6:00 am-9:55 pm

2 stops12h 55m

Washington, D.C. Dulles Intl

Wed 1/14

9:05 am-10:05 pm

2 stops16h 00m

$333

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Thu 4/16

11:30 pm-7:18 am

Nonstop4h 48m

Washington, D.C. Dulles Intl

Tue 4/21

5:30 pm-8:25 pm

Nonstop5h 55m

$338

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Washington, D.C. from

How to get the cheapest flight ticket from Portland to Washington, D.C. Dulles Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Washington, D.C. Dulles Intl Airport?

In general, August is the cheapest month to fly from Portland to Washington, D.C. Dulles Intl Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $416. If you aren’t able to travel to Washington, D.C. Dulles Intl Airport during the month of August, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $433.

What is the cheapest day to depart on your flight to Washington, D.C. Dulles Intl Airport?

Our data shows that Wednesday is the least expensive day to fly to Washington, D.C. Dulles Intl Airport. Tickets to fly out on this day can be as low as $500. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Portland to Washington, D.C. Dulles Intl Airport for around $703.

What is the cheapest time of day to depart on your flight to Washington, D.C. Dulles Intl Airport?

Flying to Washington, D.C. Dulles Intl Airport from Portland in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $455 when looking at flights departing in the afternoon. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $601 on average. Flights to Washington, D.C. Dulles Intl Airport from Portland in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest Portland to Washington, D.C. Dulles Intl flight route?

Fly from Portland to Washington, D.C. Dulles Intl for the best Portland - Washington, D.C. Dulles Intl flight prices

How far in advance should I book a flight to Washington, D.C. Dulles Intl Airport?

You are more likely to see cheaper flights to Washington, D.C. Dulles Intl Airport from Portland when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. Dulles Intl Airport for around $475 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. Dulles Intl Airport from Portland for as low as $377 on momondo.

What cabin class options are available on Portland to Washington, D.C. Dulles Intl flights?

There are 4 cabin classes available to choose from on Portland to Washington, D.C. Dulles Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have Portland to Washington, D.C. Dulles Intl Airport flight prices changed over time?

As of October 2025, prices for Portland to Washington, D.C. Dulles Intl Airport flights are approximately 11% more expensive when compared to flights at the same time last year.

When to book flights from Portland to Washington, D.C. Dulles Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Portland to Washington, D.C. Dulles Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Portland to Washington, D.C. Dulles Intl Airport (PDX to IAD) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Portland to Washington, D.C. Dulles Intl Airport

Best Price Found

$214

Fastest flight time

4h 48m

Direct flights

Every day
The best one-way flight to Washington, D.C. Dulles Intl Airport from Portland in the past 72 hours is $214. The best round-trip flight deal from Portland to Washington, D.C. Dulles Intl Airport found on momondo in the last 72 hours is $391.
The fastest flight from Portland to Washington, D.C. Dulles Intl Airport takes 4h 48m
Direct flights go from Portland to Washington, D.C. Dulles Intl Airport every day.
Search flight deals

  • How far is Portland to Washington, D.C. Dulles Intl by plane?

    A flight from Portland to Washington, D.C. Dulles Intl will travel around 2324.3 mi. A reasonable flight in good conditions will take 4h 48m.

  • When did momondo last update prices for flights from Portland Airport to Washington, D.C. Dulles Intl Airport?

    Prices for flights from Portland Airport to Washington, D.C. Dulles Intl Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Portland Airport to Washington, D.C. Dulles Intl Airport?

  • How old do you have to be to fly from Portland Airport to Washington, D.C. Dulles Intl Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Portland Airport to Washington, D.C. Dulles Intl Airport.

  • What documentation or ID do you need to fly to Washington, D.C. Dulles Intl Airport?

    The travel and health documents you'll need for your trip to Washington, D.C. Dulles Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Washington, D.C. Dulles Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Portland to Washington, D.C. Dulles Intl Airport?

  • What is the most popular airline from Portland to Washington, D.C. Dulles Intl Airport?

Best airlines flying from Portland to Washington, D.C. Dulles Intl Airport

Compare and see reviews for airlines that fly from Portland to Washington, D.C. Dulles Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $278Free CancellationRating
7.9
7,994 reviews
Search Delta flights
American AirlinesPriceFrom $298Free CancellationRating
7.2
11,032 reviews
Search American Airlines flights
United AirlinesPriceFrom $316Free CancellationRating
7.4
9,001 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $317Free CancellationRating
8.0
11,203 reviews
Search Alaska Airlines flights
SouthwestPriceFrom $318Free CancellationRating
8.0
4,240 reviews
Search Southwest flights

  • United Airlines Flights From Portland to Washington, D.C. Dulles Intl Airport

    United Airlines flight deals from Portland to Washington, D.C. Dulles Intl Airport start from $316 round-trip. Over the 6 United Airlines flights for this route in a normal week, average airfare is usually $497 round-trip - but some users have found much cheaper deals with momondo.

Traveling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
National Harbor
Gettysburg
Arlington
Winchester
Woodbridge
Waldorf
Tysons
Laurel
Colonial Beach
Silver Spring
Fredericksburg
Harpers Ferry
Towson
Rockville
Manassas
Reston
Gaithersburg
Fairfax
Sterling

Why use momondo?

Why should I use momondo to find a flight deal from Portland to Washington, D.C.?

Finding the right flight to Washington, D.C. from Portland is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Washington, D.C. quick and easy, saving you time and money.

Can I find flights from Portland to Washington, D.C. with flexible booking policies on momondo?

Yes. All flights to Washington, D.C. from Portland on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Portland to Washington, D.C.?

Once all potential Portland to Washington, D.C. flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Portland to Washington, D.C. right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Portland to Washington, D.C. flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your Washington, D.C. Dulles Intl Airport trip

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