What is the cheapest airline that flies from Portland to Washington, D.C. Dulles Intl?

United Airlines is the most popular carrier operating from Portland to Washington, D.C. Dulles Intl

What airlines fly to Washington, D.C. Dulles Intl Airport?

United Airlines, JetBlue and Spirit Airlines are the top three most popular airlines that fly to Washington, D.C. Dulles Intl Airport from Portland, Maine according to our data. United Airlines is the first choice among our users, with 98% of people opting to fly with this airline when traveling to Washington, D.C. Dulles Intl Airport. Keep in mind that there are 4 different airlines that fly to Washington, D.C. Dulles Intl Airport on a routine basis, so you have a few additional options to choose from.

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?

As of April 2026, there is 1 operator available to choose from 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.

$139 Cheap Flights from Portland, Maine to Washington, D.C. Dulles Intl Airport in 2026

Q: How many flights depart from Portland, Maine to Washington, D.C. Dulles Intl Airport on average per day?

As of April 2026, there are 4 flights per day flying from Portland, Maine to Washington, D.C. Dulles Intl Airport. The most common time of day flights depart is 9:00AM, with 75% of flights taking off at noon.

Q: How many flights depart from Portland, Maine to Washington, D.C. Dulles Intl Airport on average per week?

31 flights are operational weekly from Portland, Maine to Washington, D.C. Dulles Intl Airport as of April 2026. The most popular departure day for this route is Tue, with 16% of flights per week taking off on this day.

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Find the cheapest flights from Portland, Maine to Washington, D.C.

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One-way

Last minute

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Cheap round-trip flights

Enter your travel dates to find the best prices.

2:20 pm - 4:30 pm

PWM

IAD

2h 10mnonstop

8:20 am - 10:07 am

IAD

PWM

1h 47mnonstop

$249United Airlines

Fri, Jun 5 - Mon, Jun 8

2:20 pm - 4:30 pm

PWM

IAD

2h 10mnonstop

5:42 pm - 11:30 pm

IAD

PWM

5h 48m

1 stop

$259United Airlines

Fri, Jun 5 - Mon, Jun 8

7:36 pm - 9:35 pm

PWM

IAD

1h 59mnonstop

8:36 am - 10:22 am

IAD

PWM

1h 46mnonstop

$264United Airlines

Mon, Apr 13 - Mon, Apr 20

6:25 am - 12:18 pm

PWM

IAD

5h 53m

1 stop

7:33 pm - 12:43 am

IAD

PWM

5h 10m

1 stop

$269Delta

Thu, May 7 - Mon, May 11

6:00 am - 11:28 am

PWM

IAD

5h 28m

1 stop

12:45 pm - 2:34 pm

IAD

PWM

1h 49mnonstop

$273United Airlines

Fri, Jun 5 - Wed, Jun 10

2:38 pm - 6:53 pm

PWM

IAD

4h 15m

1 stop

5:21 pm - 12:43 am

IAD

PWM

7h 22m

2 stops

$274Delta

Thu, May 7 - Tue, May 12

2:08 pm - 4:14 pm

PWM

IAD

2h 06mnonstop

10:10 pm - 11:59 pm

IAD

PWM

1h 49mnonstop

$278United Airlines

Wed, May 6 - Sat, May 9

7:33 pm - 9:29 pm

PWM

IAD

1h 56mnonstop

5:10 pm - 6:58 pm

IAD

PWM

1h 48mnonstop

$279United Airlines

Tue, Apr 14 - Mon, Apr 20

7:12 pm - 11:25 pm

PWM

IAD

4h 13m

1 stop

8:23 am - 1:25 pm

IAD

PWM

5h 02m

1 stop

$284United Airlines

Mon, Apr 13 - Mon, Apr 20

3:39 pm - 9:11 pm

PWM

IAD

5h 32m

1 stop

10:10 pm - 11:59 pm

IAD

PWM

1h 49mnonstop

$288United Airlines

Wed, May 6 - Sat, May 9

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

May 7

PWM6:25 amPortland

5h 53m

1 stop

IAD12:18 pmWashington, D.C. Dulles Intl

May 11

IAD7:33 pmWashington, D.C. Dulles Intl

5h 10m

1 stop

PWM12:43 amPortland

$269

Delta

Apr 28

PWM6:00 amPortland

10h 15m

2 stops

IAD4:15 pmWashington, D.C. Dulles Intl

May 2

IAD6:50 pmWashington, D.C. Dulles Intl

5h 56m

1 stop

PWM12:46 amPortland

$274

Delta

Apr 30

PWM6:15 amPortland

5h 50m

1 stop

IAD12:05 pmWashington, D.C. Dulles Intl

May 4

IAD6:50 pmWashington, D.C. Dulles Intl

5h 56m

1 stop

PWM12:46 amPortland

$295

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

PWM2:20 pmPortland

2h 10m

IAD4:30 pmWashington, D.C. Dulles Intl

Jun 8

IAD8:20 amWashington, D.C. Dulles Intl

1h 47m

PWM10:07 amPortland

$249

United Airlines

May 29

PWM3:16 pmPortland

5h 44m

1 stop

IAD9:00 pmWashington, D.C. Dulles Intl

Jun 1

IAD10:10 pmWashington, D.C. Dulles Intl

1h 41m

PWM11:51 pmPortland

$259

United Airlines

Apr 13

PWM7:36 pmPortland

1h 59m

IAD9:35 pmWashington, D.C. Dulles Intl

Apr 20

IAD8:36 amWashington, D.C. Dulles Intl

1h 46m

PWM10:22 amPortland

$264

momondo Fare Finder

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

2:20 pm-4:30 pm

Nonstop2h 10m

Washington, D.C. Dulles Intl

Mon 6/8

8:20 am-10:07 am

Nonstop1h 47m

$249

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

Fri 6/5

2:20 pm-4:30 pm

Nonstop2h 10m

Washington, D.C. Dulles Intl

Mon 6/8

5:42 pm-11:30 pm

1 stop5h 48m

$259

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

Mon 4/13

7:36 pm-9:35 pm

Nonstop1h 59m

Washington, D.C. Dulles Intl

Mon 4/20

8:36 am-10:22 am

Nonstop1h 46m

$264

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

Thu 5/7

6:25 am-12:18 pm

1 stop5h 53m

Washington, D.C. Dulles Intl

Mon 5/11

7:33 pm-12:43 am

1 stop5h 10m

$269

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

Fri 6/5

6:00 am-11:28 am

1 stop5h 28m

Washington, D.C. Dulles Intl

Wed 6/10

12:45 pm-2:34 pm

Nonstop1h 49m

$273

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

Thu 5/7

2:38 pm-6:53 pm

1 stop4h 15m

Washington, D.C. Dulles Intl

Tue 5/12

5:21 pm-12:43 am

2 stops7h 22m

$274

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

Wed 5/6

2:08 pm-4:14 pm

Nonstop2h 06m

Washington, D.C. Dulles Intl

Sat 5/9

10:10 pm-11:59 pm

Nonstop1h 49m

$278

Quickest round-trip

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

Tue 4/14

7:33 pm-9:29 pm

Nonstop1h 56m

Washington, D.C. Dulles Intl

Mon 4/20

5:10 pm-6:58 pm

Nonstop1h 48m

$279

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

Mon 4/13

7:12 pm-11:25 pm

1 stop4h 13m

Washington, D.C. Dulles Intl

Mon 4/20

8:23 am-1:25 pm

1 stop5h 02m

$284

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

Wed 5/6

3:39 pm-9:11 pm

1 stop5h 32m

Washington, D.C. Dulles Intl

Sat 5/9

10:10 pm-11:59 pm

Nonstop1h 49m

$288

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

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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 $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 $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 $386. 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 $602.

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 $418 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 $599 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 $330 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.

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?

As of April 2026, prices for Portland, Maine to Washington, D.C. Dulles Intl Airport flights are approximately 11% 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	$228
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 $228. 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 $347.

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.

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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?
As of April 2026, there is 1 operator available to choose from 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?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Portland, Maine to Washington, D.C. Dulles Intl Airport is Canadair (Bombardier) Regional Jet CRJ-550 (16.67% of total bookings). The next most popular plane models are Boeing 737 MAX 8 (12.34%), Embraer 175 (Enhanced Winglets) (11.26%), and Boeing 737-800 Passenger/BBJ2 (winglets) (9.52%).
What is the most popular airline from Portland, Maine to Washington, D.C. Dulles Intl Airport?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Portland, Maine to Washington, D.C. Dulles Intl Airport is United Airlines (100% of total bookings).

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 Airlines	PriceFrom $200	Free Cancellation	Rating 7.4 9,533 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 17 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 $200 round-trip, up to an average price of $341. Our users have rated United Airlines at 7.4/10.

Alexandria

National Harbor

Gettysburg

Arlington

Winchester

Waldorf

Woodbridge

Laurel

Colonial Beach

Gaithersburg

Towson

Silver Spring

Fredericksburg

Rockville

Tysons

Manassas

Sterling

Linthicum Heights

Springfield

Bethesda

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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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Cheap flights from Portland, Maine to Washington, D.C. from $133

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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

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Our best United Airlines deals on Portland, Maine to Washington, D.C. Dulles Intl Airport flight tickets

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How to get the cheapest flight ticket from Portland, Maine to Washington, D.C. Dulles Intl Airport

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?

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

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

What is the cheapest Portland to Washington, D.C. Dulles Intl flight route?

How far in advance should I book a flight to Washington, D.C. Dulles Intl Airport?

What cabin class options are available on Portland to Washington, D.C. Dulles Intl flights?

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

What is the cheapest airline that flies from Portland to Washington, D.C. Dulles Intl?

What airlines fly to Washington, D.C. Dulles Intl Airport?

How many flights depart from Portland, Maine to Washington, D.C. Dulles Intl Airport on average per day?

How many flights depart from Portland, Maine to Washington, D.C. Dulles Intl Airport on average per week?

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

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

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Frequently asked questions about flying 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

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

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