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Cheap flights from Portland, Maine to Washington, D.C. from $131

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 1/21. 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
2:31 pm - 4:30 pm
PWM
-
IAD
1h 59mnonstop
United Airlines Logo
5:10 pm - 6:54 pm
IAD
-
PWM
1h 44mnonstop
$198United Airlines
Sat, Jan 10 - Sat, Jan 17
United Airlines Logo
7:08 pm - 11:19 pm
PWM
-
IAD
4h 11m1 stop
United Airlines Logo
5:20 pm - 7:13 pm
IAD
-
PWM
1h 53mnonstop
$199United Airlines
Sat, Mar 14 - Mon, Mar 16
United Airlines Logo
2:31 pm - 4:30 pm
PWM
-
IAD
1h 59mnonstop
United Airlines Logo
5:10 pm - 6:54 pm
IAD
-
PWM
1h 44mnonstop
$202United Airlines
Sat, Jan 10 - Sat, Jan 17
United Airlines Logo
10:19 am - 12:20 pm
PWM
-
IAD
2h 01mnonstop
United Airlines Logo
10:13 pm - 11:59 pm
IAD
-
PWM
1h 46mnonstop
$204United Airlines
Thu, Dec 25 - Sat, Jan 3
United Airlines Logo
3:05 pm - 9:22 pm
PWM
-
IAD
6h 17m1 stop
United Airlines Logo
5:10 pm - 6:54 pm
IAD
-
PWM
1h 44mnonstop
$208United Airlines
Sat, Jan 10 - Sat, Jan 17
Delta Logo
6:17 am - 11:43 am
PWM
-
IAD
5h 26m1 stop
Delta Logo
6:00 am - 12:08 pm
IAD
-
PWM
6h 08m1 stop
$209Delta
Thu, Jan 8 - Sun, Jan 11
United Airlines Logo
3:05 pm - 9:22 pm
PWM
-
IAD
6h 17m1 stop
United Airlines Logo
5:10 pm - 6:54 pm
IAD
-
PWM
1h 44mnonstop
$212United Airlines
Sat, Jan 10 - Sat, Jan 17
Delta Logo
6:00 am - 4:46 pm
PWM
-
IAD
10h 46m2 stops
Delta Logo
7:49 pm - 11:59 pm
IAD
-
PWM
4h 10m1 stop
$214Delta
Thu, Jan 22 - Sat, Jan 24
Delta Logo
1:13 pm - 11:06 pm
PWM
-
IAD
9h 53m2 stops
Delta Logo
5:26 pm - 12:20 am
IAD
-
PWM
6h 54m2 stops
$219Delta
Sat, Jan 17 - Tue, Jan 20
Delta Logo
6:17 am - 11:43 am
PWM
-
IAD
5h 26m1 stop
Delta Logo
7:49 pm - 12:20 am
IAD
-
PWM
4h 31m1 stop
$224Delta
Wed, Jan 14 - Sun, Jan 18

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

Our best Delta deals on Portland, Maine to Washington, D.C. Dulles Intl Airport flight tickets
Delta
Jan 10
PWM6:17 amPortland
5h 26m
1 stop
IAD11:43 amWashington, D.C. Dulles Intl
Jan 13
IAD7:49 pmWashington, D.C. Dulles Intl
4h 37m
1 stop
PWM12:26 amPortland
$209
Find similar
Delta
Jan 10
PWM2:35 pmPortland
4h 34m
1 stop
IAD7:09 pmWashington, D.C. Dulles Intl
Jan 13
IAD5:26 pmWashington, D.C. Dulles Intl
7h 00m
2 stops
PWM12:26 amPortland
$214
Find similar
Delta
Jan 17
PWM1:13 pmPortland
9h 53m
2 stops
IAD11:06 pmWashington, D.C. Dulles Intl
Jan 20
IAD5:26 pmWashington, D.C. Dulles Intl
6h 54m
2 stops
PWM12:20 amPortland
$219
Find similar

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
Jan 10
PWM2:31 pmPortland
1h 59m
IAD4:30 pmWashington, D.C. Dulles Intl
Jan 17
IAD5:10 pmWashington, D.C. Dulles Intl
1h 44m
PWM6:54 pmPortland
$198
Find similar
United Airlines
Mar 14
PWM7:08 pmPortland
4h 11m
1 stop
IAD11:19 pmWashington, D.C. Dulles Intl
Mar 16
IAD5:20 pmWashington, D.C. Dulles Intl
1h 53m
PWM7:13 pmPortland
$199
Find similar
United Airlines
Jan 10
PWM2:31 pmPortland
1h 59m
IAD4:30 pmWashington, D.C. Dulles Intl
Jan 17
IAD5:10 pmWashington, D.C. Dulles Intl
1h 44m
PWM6:54 pmPortland
$202
Find similar

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 December 11, 2025.
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

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

Sat 1/10

2:31 pm-4:30 pm

Nonstop1h 59m

Washington, D.C. Dulles Intl

Sat 1/17

5:10 pm-6:54 pm

Nonstop1h 44m

$198

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

Sat 3/14

7:08 pm-11:19 pm

1 stop4h 11m

Washington, D.C. Dulles Intl

Mon 3/16

5:20 pm-7:13 pm

Nonstop1h 53m

$199

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

Sat 1/10

2:31 pm-4:30 pm

Nonstop1h 59m

Washington, D.C. Dulles Intl

Sat 1/17

5:10 pm-6:54 pm

Nonstop1h 44m

$202

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

Thu 12/25

10:19 am-12:20 pm

Nonstop2h 01m

Washington, D.C. Dulles Intl

Sat 1/3

10:13 pm-11:59 pm

Nonstop1h 46m

$204

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

Sat 1/10

3:05 pm-9:22 pm

1 stop6h 17m

Washington, D.C. Dulles Intl

Sat 1/17

5:10 pm-6:54 pm

Nonstop1h 44m

$208

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

Thu 1/8

6:17 am-11:43 am

1 stop5h 26m

Washington, D.C. Dulles Intl

Sun 1/11

6:00 am-12:08 pm

1 stop6h 08m

$209

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

Sat 1/10

3:05 pm-9:22 pm

1 stop6h 17m

Washington, D.C. Dulles Intl

Sat 1/17

5:10 pm-6:54 pm

Nonstop1h 44m

$212

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

Thu 1/22

6:00 am-4:46 pm

2 stops10h 46m

Washington, D.C. Dulles Intl

Sat 1/24

7:49 pm-11:59 pm

1 stop4h 10m

$214

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

Sat 1/17

1:13 pm-11:06 pm

2 stops9h 53m

Washington, D.C. Dulles Intl

Tue 1/20

5:26 pm-12:20 am

2 stops6h 54m

$219

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

Wed 1/14

6:17 am-11:43 am

1 stop5h 26m

Washington, D.C. Dulles Intl

Sun 1/18

7:49 pm-12:20 am

1 stop4h 31m

$224

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 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 $261. 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 $278.

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 $446. When flying out on a Tuesday, 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 $747.

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 $557 when looking at flights departing in the evening. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $656 on average. Flights to Washington, D.C. Dulles Intl Airport from Portland, Maine at noon 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, 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 $323 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 $259 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, Maine to Washington, D.C. Dulles Intl Airport flight prices changed over time?

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

$233

Fastest flight time

1h 40m

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 $233. 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 $354.
The fastest flight from Portland, Maine to Washington, D.C. Dulles Intl Airport takes 1h 40m
Direct flights go from Portland, Maine to Washington, D.C. Dulles Intl Airport every day.
Search flight deals

  • 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 40m 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
DeltaPriceFrom $176Free CancellationRating
7.9
8,007 reviews
Search Delta flights
United AirlinesPriceFrom $205Free CancellationRating
7.4
9,095 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 14 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 $205 round-trip, up to an average price of $316. 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
Woodbridge
Waldorf
Tysons
Laurel
Colonial Beach
Silver Spring
Fredericksburg
Towson
Harpers Ferry
Rockville
Gaithersburg
Reston
Manassas
Sterling
Fairfax

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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