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Cheap flights from Portland to Washington, D.C. from $148

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 10/7. 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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Find the cheapest flights from Portland to Washington, D.C.

Cheap round-trip flights

Frontier Logo
12:52 pm - 3:06 pmPDX-IAD
23h 14m2 stops
Frontier Logo
10:29 pm - 11:56 amIAD-PDX
16h 27m2 stops
$282Frontier
Find Deal
Thu, Nov 6 - Sun, Nov 9
Frontier Logo
6:05 am - 12:15 amPDX-IAD
15h 10m2 stops
Frontier Logo
1:55 pm - 12:12 amIAD-PDX
13h 17m2 stops
$284Frontier
Find Deal
Fri, Sep 19 - Sun, Sep 21
Alaska Airlines Logo
1:24 pm - 12:23 amPDX-IAD
7h 59m1 stop
Alaska Airlines Logo
6:09 pm - 12:15 amIAD-PDX
9h 06m1 stop
$296Alaska Airlines
Find Deal
Wed, Sep 24 - Tue, Sep 30
Delta Logo
12:40 am - 11:26 amPDX-IAD
7h 46m1 stop
Delta Logo
7:35 am - 12:49 pmIAD-PDX
8h 14m1 stop
$297Delta
Find Deal
Tue, Oct 7 - Tue, Oct 14
United Airlines Logo
8:20 am - 4:15 pmPDX-IAD
4h 55mnonstop
United Airlines Logo
6:00 am - 12:17 pmIAD-PDX
9h 17m1 stop
$303United Airlines
Find Deal
Wed, Oct 29 - Sat, Nov 1
Alaska Airlines Logo
1:24 pm - 12:23 amPDX-IAD
7h 59m1 stop
Alaska Airlines Logo
7:00 am - 12:27 pmIAD-PDX
8h 27m1 stop
$306Alaska Airlines
Find Deal
Wed, Sep 17 - Sat, Sep 27
United Airlines Logo
8:08 am - 4:15 pmPDX-IAD
5h 07mnonstop
United Airlines Logo
5:15 pm - 10:25 pmIAD-PDX
8h 10m1 stop
$307United Airlines
Find Deal
Sat, Oct 11 - Tue, Oct 21
Southwest Logo
6:40 am - 10:05 pmPDX-IAD
12h 25m2 stops
Southwest Logo
6:05 pm - 10:20 pmIAD-PDX
7h 15m1 stop
$308Southwest
Find Deal
Tue, Sep 9 - Tue, Sep 16
Delta Logo
6:00 am - 4:27 pmPDX-IAD
7h 27m1 stop
Delta Logo
6:00 am - 10:32 amIAD-PDX
7h 32m1 stop
$317Delta
Find Deal
Sat, Sep 13 - Mon, Sep 22
Southwest Logo
5:00 am - 10:10 pmPDX-IAD
14h 10m2 stops
Southwest Logo
5:00 am - 11:05 amIAD-PDX
9h 05m1 stop
$332Southwest
Find Deal
Tue, Nov 4 - Sat, Dec 6

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
Sep 24
PDX1:24 pmPortland
7h 59m
1 stop
IAD12:23 amWashington, D.C. Dulles Intl
Sep 30
IAD6:09 pmWashington, D.C. Dulles Intl
9h 06m
1 stop
PDX12:15 amPortland
$296
Find similar
Alaska Airlines
Sep 17
PDX1:24 pmPortland
7h 59m
1 stop
IAD12:23 amWashington, D.C. Dulles Intl
Sep 27
IAD7:00 amWashington, D.C. Dulles Intl
8h 27m
1 stop
PDX12:27 pmPortland
$306
Find similar
Alaska Airlines
Sep 25
PDX9:30 pmPortland
16h 22m
1 stop
IAD4:52 pmWashington, D.C. Dulles Intl
Sep 29
IAD5:52 pmWashington, D.C. Dulles Intl
18h 46m
1 stop
PDX9:38 amPortland
$316
Find similar

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

Our best American Airlines deals on Portland to Washington, D.C. Dulles Intl Airport flight tickets
American Airlines
Sep 13
PDX5:38 amPortland
8h 09m
1 stop
IAD4:47 pmWashington, D.C. Dulles Intl
Sep 20
IAD12:48 pmWashington, D.C. Dulles Intl
11h 39m
2 stops
PDX9:27 pmPortland
$322
Find similar
American Airlines
Sep 17
PDX8:31 amPortland
11h 17m
2 stops
IAD10:48 pmWashington, D.C. Dulles Intl
Sep 22
IAD6:25 amWashington, D.C. Dulles Intl
10h 58m
2 stops
PDX2:23 pmPortland
$348
Find similar
American Airlines
Sep 2
PDX11:59 pmPortland
10h 52m
2 stops
IAD1:51 pmWashington, D.C. Dulles Intl
Sep 9
IAD11:47 amWashington, D.C. Dulles Intl
10h 07m
1 stop
PDX6:54 pmPortland
$443
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 August 20, 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

Thu 11/6

12:52 pm-3:06 pm

2 stops23h 14m

Washington, D.C. Dulles Intl

Sun 11/9

10:29 pm-11:56 am

2 stops16h 27m

$282

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Fri 9/19

6:05 am-12:15 am

2 stops15h 10m

Washington, D.C. Dulles Intl

Sun 9/21

1:55 pm-12:12 am

2 stops13h 17m

$284

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Wed 9/24

1:24 pm-12:23 am

1 stop7h 59m

Washington, D.C. Dulles Intl

Tue 9/30

6:09 pm-12:15 am

1 stop9h 06m

$296

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Tue 10/7

12:40 am-11:26 am

1 stop7h 46m

Washington, D.C. Dulles Intl

Tue 10/14

7:35 am-12:49 pm

1 stop8h 14m

$297

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Wed 10/29

8:20 am-4:15 pm

Nonstop4h 55m

Washington, D.C. Dulles Intl

Sat 11/1

6:00 am-12:17 pm

1 stop9h 17m

$303

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Wed 9/17

1:24 pm-12:23 am

1 stop7h 59m

Washington, D.C. Dulles Intl

Sat 9/27

7:00 am-12:27 pm

1 stop8h 27m

$306

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Sat 10/11

8:08 am-4:15 pm

Nonstop5h 07m

Washington, D.C. Dulles Intl

Tue 10/21

5:15 pm-10:25 pm

1 stop8h 10m

$307

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Tue 9/9

6:40 am-10:05 pm

2 stops12h 25m

Washington, D.C. Dulles Intl

Tue 9/16

6:05 pm-10:20 pm

1 stop7h 15m

$308

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Sat 9/13

6:00 am-4:27 pm

1 stop7h 27m

Washington, D.C. Dulles Intl

Mon 9/22

6:00 am-10:32 am

1 stop7h 32m

$317

PortlandWashington, D.C.

PDX - IAD

PDXIAD

Portland

Tue 11/4

5:00 am-10:10 pm

2 stops14h 10m

Washington, D.C. Dulles Intl

Sat 12/6

5:00 am-11:05 am

1 stop9h 05m

$332

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 $428. If you aren’t able to travel to Washington, D.C. Dulles Intl Airport during the month of August, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $436.

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 $524. 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 $679.

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 $625 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 $503 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.

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

You could potentially save up to 6% 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 August 2025, prices for Portland to Washington, D.C. Dulles Intl Airport flights are approximately 4% 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

$225

Fastest flight time

4h 55m

Direct flights

Every day
The best one-way flight to Washington, D.C. Dulles Intl Airport from Portland in the past 72 hours is $225. The best round-trip flight deal from Portland to Washington, D.C. Dulles Intl Airport found on momondo in the last 72 hours is $419.
The fastest flight from Portland to Washington, D.C. Dulles Intl Airport takes 4h 55m
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 55m.

  • 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 $297Free CancellationRating
7.9
7,982 reviews
Search Delta flights
American AirlinesPriceFrom $298Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
SouthwestPriceFrom $318Free CancellationRating
8.0
4,246 reviews
Search Southwest flights
Alaska AirlinesPriceFrom $336Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights
United AirlinesPriceFrom $357Free CancellationRating
7.4
8,928 reviews
Search United Airlines 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 $357 round-trip. Over the 6 United Airlines flights for this route in a normal week, average airfare is usually $526 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
Gettysburg
Arlington
National Harbor
Winchester
Woodbridge
Waldorf
Tysons
Silver Spring
Laurel
Colonial Beach
Fredericksburg
Harpers Ferry
Manassas
Towson
Rockville
Gaithersburg
Reston
Fairfax
Glen Burnie

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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