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Cheap flights from Portland, Maine to Washington, D.C. from $138

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, Maine to Washington, D.C. departing on 6/7. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
6:00 am - 11:28 am
PWM
-
IAD
5h 28m
1 stop
United Airlines Logo
10:10 pm - 11:51 pm
IAD
-
PWM
1h 41mnonstop
$259United Airlines
Fri, Jun 5 - Sun, Jun 7
United Airlines Logo
5:15 am - 7:00 am
PWM
-
IAD
1h 45mnonstop
United Airlines Logo
10:10 pm - 11:51 pm
IAD
-
PWM
1h 41mnonstop
$260United Airlines
Fri, Jun 26 - Tue, Jun 30
United Airlines Logo
5:15 am - 7:00 am
PWM
-
IAD
1h 45mnonstop
United Airlines Logo
5:30 pm - 7:27 pm
IAD
-
PWM
1h 57mnonstop
$261United Airlines
Fri, Jun 5 - Sat, Jun 6
United Airlines Logo
9:55 am - 11:46 am
PWM
-
IAD
1h 51mnonstop
United Airlines Logo
10:10 pm - 11:51 pm
IAD
-
PWM
1h 41mnonstop
$264United Airlines
Thu, May 28 - Sat, Jun 6
Delta Logo
4:47 pm - 11:26 pm
PWM
-
IAD
6h 39m
1 stop
Delta Logo
2:54 pm - 9:31 pm
IAD
-
PWM
6h 37m
1 stop
$269Delta
Fri, Aug 21 - Sat, Aug 29
United Airlines Logo
6:00 am - 11:28 am
PWM
-
IAD
5h 28m
1 stop
United Airlines Logo
10:10 pm - 11:51 pm
IAD
-
PWM
1h 41mnonstop
$270United Airlines
Thu, Jun 4 - Sun, Jun 7
United Airlines Logo
3:16 pm - 9:00 pm
PWM
-
IAD
5h 44m
1 stop
United Airlines Logo
8:20 am - 10:07 am
IAD
-
PWM
1h 47mnonstop
$272United Airlines
Fri, Jun 12 - Sun, Jun 14
United Airlines Logo
3:16 pm - 9:00 pm
PWM
-
IAD
5h 44m
1 stop
United Airlines Logo
10:10 pm - 11:51 pm
IAD
-
PWM
1h 41mnonstop
$274United Airlines
Fri, Jun 12 - Tue, Jun 16
United Airlines Logo
5:15 am - 7:00 am
PWM
-
IAD
1h 45mnonstop
United Airlines Logo
10:10 pm - 11:51 pm
IAD
-
PWM
1h 41mnonstop
$277United Airlines
Wed, May 27 - Sat, Jun 27
United Airlines Logo
9:55 am - 11:46 am
PWM
-
IAD
1h 51mnonstop
United Airlines Logo
10:10 pm - 11:51 pm
IAD
-
PWM
1h 41mnonstop
$279United Airlines
Fri, May 29 - Mon, Jun 1

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

Our best American Airlines deals on Portland, Maine to Washington, D.C. Dulles Intl Airport flight tickets
American Airlines
Sep 18
PWM7:20 pmPortland
4h 31m
1 stop
IAD11:51 pmWashington, D.C. Dulles Intl
Sep 21
IAD6:58 amWashington, D.C. Dulles Intl
6h 24m
1 stop
PWM1:22 pmPortland
$314
American Airlines
Jun 12
PWM5:57 pmPortland
6h 16m
1 stop
IAD12:13 amWashington, D.C. Dulles Intl
Jun 14
IAD6:20 amWashington, D.C. Dulles Intl
7h 18m
1 stop
PWM1:38 pmPortland
$335
American Airlines
May 27
PWM5:57 pmPortland
6h 16m
1 stop
IAD12:13 amWashington, D.C. Dulles Intl
Jun 2
IAD6:20 amWashington, D.C. Dulles Intl
7h 18m
1 stop
PWM1:38 pmPortland
$365

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

Our best United Airlines deals on Portland, Maine to Washington, D.C. Dulles Intl Airport flight tickets
United Airlines
Jun 5
PWM6:00 amPortland
5h 28m
1 stop
IAD11:28 amWashington, D.C. Dulles Intl
Jun 7
IAD10:10 pmWashington, D.C. Dulles Intl
1h 41m
PWM11:51 pmPortland
$259
United Airlines
Jun 26
PWM5:15 amPortland
1h 45m
IAD7:00 amWashington, D.C. Dulles Intl
Jun 30
IAD10:10 pmWashington, D.C. Dulles Intl
1h 41m
PWM11:51 pmPortland
$260
United Airlines
Jun 5
PWM5:15 amPortland
1h 45m
IAD7:00 amWashington, D.C. Dulles Intl
Jun 6
IAD5:30 pmWashington, D.C. Dulles Intl
1h 57m
PWM7:27 pmPortland
$261

momondo Fare Finder

 
Customize your flight search to find flights from Portland, Maine 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 May 16, 2026.
Use the filters below to find and compare flights from Portland, Maine 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.

PWM - IAD

PWMIAD

Portland

Fri 6/5

6:00 am-11:28 am

1 stop5h 28m

Washington, D.C. Dulles Intl

Sun 6/7

10:10 pm-11:51 pm

Nonstop1h 41m

$259
Quickest round-trip

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

Fri 6/26

5:15 am-7:00 am

Nonstop1h 45m

Washington, D.C. Dulles Intl

Tue 6/30

10:10 pm-11:51 pm

Nonstop1h 41m

$260

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

Fri 6/5

5:15 am-7:00 am

Nonstop1h 45m

Washington, D.C. Dulles Intl

Sat 6/6

5:30 pm-7:27 pm

Nonstop1h 57m

$261

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

Thu 5/28

9:55 am-11:46 am

Nonstop1h 51m

Washington, D.C. Dulles Intl

Sat 6/6

10:10 pm-11:51 pm

Nonstop1h 41m

$264

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

Fri 8/21

4:47 pm-11:26 pm

1 stop6h 39m

Washington, D.C. Dulles Intl

Sat 8/29

2:54 pm-9:31 pm

1 stop6h 37m

$269

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

Thu 6/4

6:00 am-11:28 am

1 stop5h 28m

Washington, D.C. Dulles Intl

Sun 6/7

10:10 pm-11:51 pm

Nonstop1h 41m

$270

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

Fri 6/12

3:16 pm-9:00 pm

1 stop5h 44m

Washington, D.C. Dulles Intl

Sun 6/14

8:20 am-10:07 am

Nonstop1h 47m

$272

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

Fri 6/12

3:16 pm-9:00 pm

1 stop5h 44m

Washington, D.C. Dulles Intl

Tue 6/16

10:10 pm-11:51 pm

Nonstop1h 41m

$274

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

Wed 5/27

5:15 am-7:00 am

Nonstop1h 45m

Washington, D.C. Dulles Intl

Sat 6/27

10:10 pm-11:51 pm

Nonstop1h 41m

$277

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

Fri 5/29

9:55 am-11:46 am

Nonstop1h 51m

Washington, D.C. Dulles Intl

Mon 6/1

10:10 pm-11:51 pm

Nonstop1h 41m

$279

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, Maine 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 typical price of a round-trip flight between Portland, Maine and Washington, D.C. Dulles Intl Airport?

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

In general, September is the cheapest month to fly from Portland, Maine 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 $260. If you aren’t able to travel to Washington, D.C. Dulles Intl Airport during the month of September, then flying in November is also cheap. Prices for this month can be found on momondo for an average of $284.

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 $384. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from Portland, Maine to Washington, D.C. Dulles Intl Airport for around $611.

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, Maine in the evening is the least expensive time of day to depart. momondo users have found prices as low as $406 when looking at flights departing in the evening. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $685 on average. Flights to Washington, D.C. Dulles Intl Airport from Portland, Maine in the afternoon 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 from Portland, Maine to Washington, D.C. Dulles Intl Airport?

You are more likely to see cheaper flights to Washington, D.C. Dulles Intl Airport from Portland, Maine 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 $340 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, Maine for as low as $189 on momondo.

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

As of May 2026, prices for Portland, Maine to Washington, D.C. Dulles Intl Airport flights are approximately 107% more expensive when compared to flights at the same time last year.

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

Are you open to changing your travel dates? Check out the ideal times to fly from Portland, Maine 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, Maine to Washington, D.C. Dulles Intl Airport (PWM to IAD) flight deals and tips

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

Best Price Found

$217

Fastest flight time

1h 45m

Direct flights

Every day
The best one-way flight to Washington, D.C. Dulles Intl Airport from Portland, Maine in the past 72 hours is $217. The best round-trip flight deal from Portland, Maine to Washington, D.C. Dulles Intl Airport found on momondo in the last 72 hours is $319.
The fastest flight from Portland, Maine to Washington, D.C. Dulles Intl Airport takes 1h 45m
Direct flights go from Portland, Maine to Washington, D.C. Dulles Intl Airport every day.
Search flight deals

Frequently asked questions about flying from Portland, Maine to Washington, D.C. Dulles Intl Airport

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

    The distance between Portland and Washington, D.C. Dulles Intl is about 494.7 mi. 1h 45m is a normal flight duration for this route.

  • 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 for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for 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 required for your trip to Washington, D.C. Dulles Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Washington, D.C. Dulles Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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

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

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

Compare and see reviews for airlines that fly from Portland, Maine to Washington, D.C. Dulles Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $204Free CancellationRating
7.4
9,726 reviews
Search United Airlines flights

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

    United Airlines is one of the most popular airlines flying from Portland, Maine to Washington, D.C. Dulles Intl Airport, operating 21 flights/week on average for this route. A good United Airlines flight deal for Portland, Maine to Washington, D.C. Dulles Intl Airport starts from $204 round-trip, up to an average price of $344. Our users have rated United Airlines at 7.4/10.

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
Laurel
Gaithersburg
Colonial Beach
Fredericksburg
Silver Spring
Towson
Rockville
Manassas
Sterling
Linthicum Heights
Tysons
Bethesda
Springfield

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Portland to Washington, D.C.. momondo saves you time and could save you money on your trip.

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

Yes. momondo allows you to filter the results for Portland to Washington, D.C. flights to just show those with flexible booking policies.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Washington, D.C. from Portland.

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

If you are not ready to book a flight from Portland to Washington, D.C. now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Washington, D.C. and let you know when they change.

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