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Cheap flights from Portland to Washington, D.C. from $145

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 5/31. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
12:30 am - 11:32 am
PDX
-
IAD
8h 02m
1 stop
Delta Logo
6:00 am - 12:49 pm
IAD
-
PDX
9h 49m
1 stop
$297Delta
Mon, Apr 13 - Tue, Apr 21
American Airlines Logo
11:47 pm - 2:51 pm
PDX
-
IAD
12h 04m
2 stops
American Airlines Logo
7:00 am - 12:58 pm
IAD
-
PDX
8h 58m
1 stop
$302American Airlines
Wed, Apr 22 - Wed, Apr 29
Alaska Airlines Logo
1:52 pm - 12:09 am
PDX
-
IAD
7h 17m
1 stop
Alaska Airlines Logo
7:10 am - 7:34 pm
IAD
-
PDX
15h 24m
1 stop
$307Alaska Airlines
Tue, Apr 28 - Wed, May 6
Delta Logo
11:15 pm - 11:32 am
PDX
-
IAD
9h 17m
1 stop
Delta Logo
7:00 am - 5:10 pm
IAD
-
PDX
13h 10m
1 stop
$312Delta
Tue, Apr 7 - Tue, Apr 14
Delta Logo
7:32 pm - 10:18 am
PDX
-
IAD
11h 46m
2 stops
Delta Logo
6:00 am - 12:52 pm
IAD
-
PDX
9h 52m
2 stops
$317Delta
Wed, Apr 15 - Wed, Apr 22
Multiple Airlines Logo
5:46 pm - 7:34 am
PDX
-
IAD
10h 48m
1 stop
Multiple Airlines Logo
9:12 am - 5:24 pm
IAD
-
PDX
11h 12m
1 stop
$319Multiple Airlines
Thu, May 28 - Mon, Jun 1
Delta Logo
5:30 am - 11:55 pm
PDX
-
IAD
15h 25m
1 stop
Delta Logo
5:07 pm - 9:56 pm
IAD
-
PDX
7h 49m
1 stop
$322Delta
Tue, Apr 28 - Tue, May 5
Alaska Airlines Logo
1:52 pm - 12:09 am
PDX
-
IAD
7h 17m
1 stop
Alaska Airlines Logo
7:10 am - 12:52 pm
IAD
-
PDX
8h 42m
1 stop
$325Alaska Airlines
Sat, May 2 - Sat, May 9
Alaska Airlines Logo
1:52 pm - 12:09 am
PDX
-
IAD
7h 17m
1 stop
Alaska Airlines Logo
7:10 am - 7:34 pm
IAD
-
PDX
15h 24m
1 stop
$327Alaska Airlines
Wed, Apr 29 - Wed, May 6
Frontier Logo
6:19 pm - 8:12 am
PDX
-
IAD
10h 53m
1 stop
Frontier Logo
9:12 am - 5:24 pm
IAD
-
PDX
11h 12m
1 stop
$331Frontier
Thu, Jun 4 - Mon, Jun 8

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
Apr 13
PDX12:30 amPortland
8h 02m
1 stop
IAD11:32 amWashington, D.C. Dulles Intl
Apr 21
IAD6:00 amWashington, D.C. Dulles Intl
9h 49m
1 stop
PDX12:49 pmPortland
$297
Delta
Apr 16
PDX1:32 pmPortland
7h 23m
1 stop
IAD11:55 pmWashington, D.C. Dulles Intl
Apr 21
IAD7:00 amWashington, D.C. Dulles Intl
10h 53m
1 stop
PDX2:53 pmPortland
$307
Delta
Apr 7
PDX11:15 pmPortland
9h 17m
1 stop
IAD11:32 amWashington, D.C. Dulles Intl
Apr 15
IAD7:00 amWashington, D.C. Dulles Intl
13h 10m
1 stop
PDX5:10 pmPortland
$312

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
May 2
PDX1:52 pmPortland
7h 17m
1 stop
IAD12:09 amWashington, D.C. Dulles Intl
May 9
IAD7:10 amWashington, D.C. Dulles Intl
8h 42m
1 stop
PDX12:52 pmPortland
$325
Alaska Airlines
May 2
PDX1:52 pmPortland
7h 17m
1 stop
IAD12:09 amWashington, D.C. Dulles Intl
May 9
IAD7:10 amWashington, D.C. Dulles Intl
8h 42m
1 stop
PDX12:52 pmPortland
$336
Alaska Airlines
Apr 14
PDX5:32 pmPortland
20h 50m
1 stop
IAD5:22 pmWashington, D.C. Dulles Intl
Apr 21
IAD6:22 pmWashington, D.C. Dulles Intl
18h 26m
1 stop
PDX9:48 amPortland
$337

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 March 19, 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 4/13

12:30 am-11:32 am

1 stop8h 02m

Washington, D.C. Dulles Intl

Tue 4/21

6:00 am-12:49 pm

1 stop9h 49m

$297

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Wed 4/22

11:47 pm-2:51 pm

2 stops12h 04m

Washington, D.C. Dulles Intl

Wed 4/29

7:00 am-12:58 pm

1 stop8h 58m

$302

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Tue 4/28

1:52 pm-12:09 am

1 stop7h 17m

Washington, D.C. Dulles Intl

Wed 5/6

7:10 am-7:34 pm

1 stop15h 24m

$307

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Tue 4/7

11:15 pm-11:32 am

1 stop9h 17m

Washington, D.C. Dulles Intl

Tue 4/14

7:00 am-5:10 pm

1 stop13h 10m

$312

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Wed 4/15

7:32 pm-10:18 am

2 stops11h 46m

Washington, D.C. Dulles Intl

Wed 4/22

6:00 am-12:52 pm

2 stops9h 52m

$317

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Thu 5/28

5:46 pm-7:34 am

1 stop10h 48m

Washington, D.C. Dulles Intl

Mon 6/1

9:12 am-5:24 pm

1 stop11h 12m

$319

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Tue 4/28

5:30 am-11:55 pm

1 stop15h 25m

Washington, D.C. Dulles Intl

Tue 5/5

5:07 pm-9:56 pm

1 stop7h 49m

$322
Quickest round-trip

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Sat 5/2

1:52 pm-12:09 am

1 stop7h 17m

Washington, D.C. Dulles Intl

Sat 5/9

7:10 am-12:52 pm

1 stop8h 42m

$325

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Wed 4/29

1:52 pm-12:09 am

1 stop7h 17m

Washington, D.C. Dulles Intl

Wed 5/6

7:10 am-7:34 pm

1 stop15h 24m

$327

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Thu 6/4

6:19 pm-8:12 am

1 stop10h 53m

Washington, D.C. Dulles Intl

Mon 6/8

9:12 am-5:24 pm

1 stop11h 12m

$331

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, January 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 $296. If you aren’t able to travel to Washington, D.C. Dulles Intl Airport during the month of January, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $337.

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

Our data shows that Friday 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 $473. 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 $646.

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 evening is the least expensive time of day to depart. momondo users have found prices as low as $479 when looking at flights departing in the evening. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $546 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 $425 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 $328 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.

Can stopping save me money on Portland to Washington, D.C. Dulles Intl Airport flights?

You could potentially save up to 30% on your flight if you consider stops on a Portland to Washington, D.C. Dulles Intl Airport flight.

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

As of March 2026, prices for Portland to Washington, D.C. Dulles Intl Airport flights are approximately 10% cheaper 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

$204

Fastest flight time

4h 53m

Direct flights

Every day
The best one-way flight to Washington, D.C. Dulles Intl Airport from Portland in the past 72 hours is $204. The best round-trip flight deal from Portland to Washington, D.C. Dulles Intl Airport found on momondo in the last 72 hours is $394.
The fastest flight from Portland to Washington, D.C. Dulles Intl Airport takes 4h 53m
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 53m.

  • 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 $138Free CancellationRating
7.9
8,298 reviews
Search Delta flights
Alaska AirlinesPriceFrom $253Free CancellationRating
7.9
12,074 reviews
Search Alaska Airlines flights
United AirlinesPriceFrom $297Free CancellationRating
7.4
9,442 reviews
Search United Airlines flights
SouthwestPriceFrom $336Free CancellationRating
8.0
4,320 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 $297 round-trip. Over the 5 United Airlines flights for this route in a normal week, average airfare is usually $446 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
Waldorf
Woodbridge
Colonial Beach
Laurel
Towson
Gaithersburg
Silver Spring
Fredericksburg
Rockville
Tysons
Manassas
Springfield
Linthicum Heights
Bethesda
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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