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Cheap flights from Portland, Maine to Washington, D.C. from $139

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 12/31. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap round-trip flights

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United Airlines Logo
7:01 pm - 11:06 pmPWM-IAD
4h 05m1 stop
United Airlines Logo
8:00 am - 9:44 amIAD-PWM
1h 44mnonstop
$199United Airlines
Find Deal
qua, dez 24 - qua, dez 31
Delta Logo
6:16 am - 11:43 amPWM-IAD
5h 27m1 stop
Delta Logo
7:49 pm - 11:59 pmIAD-PWM
4h 10m1 stop
$209Delta
Find Deal
qui, jan 22 - sáb, jan 24
United Airlines Logo
6:46 pm - 11:06 pmPWM-IAD
4h 20m1 stop
United Airlines Logo
8:00 am - 9:44 amIAD-PWM
1h 44mnonstop
$210United Airlines
Find Deal
seg, dez 22 - sex, dez 26
Delta Logo
12:43 pm - 11:06 pmPWM-IAD
10h 23m2 stops
Delta Logo
7:49 pm - 12:20 amIAD-PWM
4h 31m1 stop
$214Delta
Find Deal
qua, fev 4 - dom, fev 8
United Airlines Logo
7:22 pm - 9:18 pmPWM-IAD
1h 56mnonstop
United Airlines Logo
12:35 pm - 2:19 pmIAD-PWM
1h 44mnonstop
$219United Airlines
Find Deal
seg, dez 1 - sáb, dez 6
Delta Logo
2:34 pm - 7:19 pmPWM-IAD
4h 45m1 stop
Delta Logo
7:59 pm - 11:59 pmIAD-PWM
4h 00m1 stop
$224Delta
Find Deal
qui, dez 4 - sáb, dez 6
United Airlines Logo
3:20 pm - 9:25 pmPWM-IAD
6h 05m1 stop
United Airlines Logo
12:35 pm - 2:19 pmIAD-PWM
1h 44mnonstop
$227United Airlines
Find Deal
sex, dez 12 - seg, dez 15
United Airlines Logo
7:22 pm - 9:18 pmPWM-IAD
1h 56mnonstop
United Airlines Logo
5:19 pm - 11:12 pmIAD-PWM
5h 53m1 stop
$229United Airlines
Find Deal
seg, dez 1 - sáb, dez 6
United Airlines Logo
2:13 pm - 4:11 pmPWM-IAD
1h 58mnonstop
United Airlines Logo
12:35 pm - 2:19 pmIAD-PWM
1h 44mnonstop
$234United Airlines
Find Deal
sex, dez 5 - dom, dez 7
United Airlines Logo
3:20 pm - 9:25 pmPWM-IAD
6h 05m1 stop
United Airlines Logo
12:35 pm - 2:19 pmIAD-PWM
1h 44mnonstop
$236United Airlines
Find Deal
sex, dez 12 - dom, dez 14

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
Dec 24
PWM7:01 pmPortland
4h 05m
1 stop
IAD11:06 pmWashington, D.C. Dulles Intl
Dec 31
IAD8:00 amWashington, D.C. Dulles Intl
1h 44m
PWM9:44 amPortland
$199
Find similar
United Airlines
Dec 22
PWM6:46 pmPortland
4h 20m
1 stop
IAD11:06 pmWashington, D.C. Dulles Intl
Dec 26
IAD8:00 amWashington, D.C. Dulles Intl
1h 44m
PWM9:44 amPortland
$210
Find similar
United Airlines
Dec 5
PWM3:20 pmPortland
6h 05m
1 stop
IAD9:25 pmWashington, D.C. Dulles Intl
Dec 7
IAD12:35 pmWashington, D.C. Dulles Intl
1h 44m
PWM2:19 pmPortland
$214
Find similar

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 22
PWM6:16 amPortland
5h 27m
1 stop
IAD11:43 amWashington, D.C. Dulles Intl
Jan 24
IAD7:49 pmWashington, D.C. Dulles Intl
4h 10m
1 stop
PWM11:59 pmPortland
$209
Find similar
Delta
Dec 4
PWM2:34 pmPortland
4h 45m
1 stop
IAD7:19 pmWashington, D.C. Dulles Intl
Dec 6
IAD7:59 pmWashington, D.C. Dulles Intl
4h 00m
1 stop
PWM11:59 pmPortland
$224
Find similar
Delta
Dec 4
PWM2:34 pmPortland
4h 45m
1 stop
IAD7:19 pmWashington, D.C. Dulles Intl
Dec 6
IAD11:06 amWashington, D.C. Dulles Intl
4h 54m
1 stop
PWM4:00 pmPortland
$239
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 novembro 17, 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

qua 12/24

7:01 pm-11:06 pm

1 stop4h 05m

Washington, D.C. Dulles Intl

qua 12/31

8:00 am-9:44 am

Nonstop1h 44m

$199

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

qui 1/22

6:16 am-11:43 am

1 stop5h 27m

Washington, D.C. Dulles Intl

sáb 1/24

7:49 pm-11:59 pm

1 stop4h 10m

$209

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

seg 12/22

6:46 pm-11:06 pm

1 stop4h 20m

Washington, D.C. Dulles Intl

sex 12/26

8:00 am-9:44 am

Nonstop1h 44m

$210

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

qua 2/4

12:43 pm-11:06 pm

2 stops10h 23m

Washington, D.C. Dulles Intl

dom 2/8

7:49 pm-12:20 am

1 stop4h 31m

$214

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

seg 12/1

7:22 pm-9:18 pm

Nonstop1h 56m

Washington, D.C. Dulles Intl

sáb 12/6

12:35 pm-2:19 pm

Nonstop1h 44m

$219

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

qui 12/4

2:34 pm-7:19 pm

1 stop4h 45m

Washington, D.C. Dulles Intl

sáb 12/6

7:59 pm-11:59 pm

1 stop4h 00m

$224

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

sex 12/12

3:20 pm-9:25 pm

1 stop6h 05m

Washington, D.C. Dulles Intl

seg 12/15

12:35 pm-2:19 pm

Nonstop1h 44m

$227

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

seg 12/1

7:22 pm-9:18 pm

Nonstop1h 56m

Washington, D.C. Dulles Intl

sáb 12/6

5:19 pm-11:12 pm

1 stop5h 53m

$229

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

sex 12/5

2:13 pm-4:11 pm

Nonstop1h 58m

Washington, D.C. Dulles Intl

dom 12/7

12:35 pm-2:19 pm

Nonstop1h 44m

$234

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

sex 12/12

3:20 pm-9:25 pm

1 stop6h 05m

Washington, D.C. Dulles Intl

dom 12/14

12:35 pm-2:19 pm

Nonstop1h 44m

$236

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 January is also cheap. Prices for this month can be found on momondo for an average of $274.

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 $400. When flying out on a Sunday, 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 $603.

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 $445 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 $676 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 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

$175

Fastest flight time

1h 53m

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 $175. 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 $298.
The fastest flight from Portland, Maine to Washington, D.C. Dulles Intl Airport takes 1h 53m
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 53m 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
8,008 reviews
Search Delta flights
United AirlinesPriceFrom $194Free CancellationRating
7.4
9,014 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 23 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 $194 round-trip, up to an average price of $310. 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
Harpers Ferry
Towson
Rockville
Reston
Manassas
Gaithersburg
Fairfax
Glen Burnie

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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qua 12/17
qua 12/24
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