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, Delta and JetBlue 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 97% 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 February 2026, there are 2 operators 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.

$131 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 week?

28 flights are operational weekly from Portland, Maine to Washington, D.C. Dulles Intl Airport as of February 2026. The most popular departure day for this route is Mon, with 14% of flights per week taking off on this day.

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

As of February 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.

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

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Enter your travel dates to find the best prices.

11:30 am - 4:25 pm

PWM

IAD

4h 55m

1 stop

8:36 am - 10:22 am

IAD

PWM

1h 46mnonstop

$208United Airlines

Thu, Mar 26 - Tue, Mar 31

4:48 pm - 10:59 pm

PWM

IAD

6h 11m

1 stop

6:00 am - 12:09 pm

IAD

PWM

6h 09m

1 stop

$209Delta

Thu, Mar 26 - Tue, Mar 31

6:00 am - 11:32 am

PWM

IAD

5h 32m

1 stop

10:10 pm - 11:50 pm

IAD

PWM

1h 40mnonstop

$210United Airlines

Thu, May 21 - Thu, May 28

7:07 pm - 11:19 pm

PWM

IAD

4h 12m

1 stop

8:36 am - 10:22 am

IAD

PWM

1h 46mnonstop

$213United Airlines

Thu, Mar 26 - Tue, Mar 31

3:39 pm - 9:11 pm

PWM

IAD

5h 32m

1 stop

10:10 pm - 11:59 pm

IAD

PWM

1h 49mnonstop

$214United Airlines

Thu, May 7 - Mon, May 11

2:30 pm - 7:19 pm

PWM

IAD

4h 49m

1 stop

6:00 am - 12:09 pm

IAD

PWM

6h 09m

1 stop

$219Delta

Fri, Mar 27 - Tue, Mar 31

2:38 pm - 6:53 pm

PWM

IAD

4h 15m

1 stop

6:00 am - 11:57 am

IAD

PWM

5h 57m

1 stop

$224Delta

Thu, May 7 - Mon, May 11

7:08 pm - 11:19 pm

PWM

IAD

4h 11m

1 stop

12:48 pm - 2:32 pm

IAD

PWM

1h 44mnonstop

$225United Airlines

Sat, Mar 7 - Tue, Mar 10

3:10 pm - 9:03 pm

PWM

IAD

5h 53m

1 stop

12:39 pm - 2:23 pm

IAD

PWM

1h 44mnonstop

$229United Airlines

Thu, Feb 26 - Mon, Mar 2

6:00 am - 4:28 pm

PWM

IAD

10h 28m

2 stops

6:00 am - 1:50 pm

IAD

PWM

7h 50m

2 stops

$234Delta

Wed, Mar 4 - Tue, Mar 10

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

Mar 26

PWM11:30 amPortland

4h 55m

1 stop

IAD4:25 pmWashington, D.C. Dulles Intl

Mar 31

IAD8:36 amWashington, D.C. Dulles Intl

1h 46m

PWM10:22 amPortland

$208

United Airlines

May 21

PWM6:00 amPortland

5h 32m

1 stop

IAD11:32 amWashington, D.C. Dulles Intl

May 28

IAD10:10 pmWashington, D.C. Dulles Intl

1h 40m

PWM11:50 pmPortland

$210

United Airlines

Mar 26

PWM7:07 pmPortland

4h 12m

1 stop

IAD11:19 pmWashington, D.C. Dulles Intl

Mar 31

IAD8:36 amWashington, D.C. Dulles Intl

1h 46m

PWM10:22 amPortland

$213

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

Mar 26

PWM4:48 pmPortland

6h 11m

1 stop

IAD10:59 pmWashington, D.C. Dulles Intl

Mar 30

IAD7:59 pmWashington, D.C. Dulles Intl

4h 00m

1 stop

PWM11:59 pmPortland

$209

Delta

Mar 27

PWM2:30 pmPortland

4h 49m

1 stop

IAD7:19 pmWashington, D.C. Dulles Intl

Mar 31

IAD6:00 amWashington, D.C. Dulles Intl

6h 09m

1 stop

PWM12:09 pmPortland

$219

Delta

Mar 4

PWM6:30 amPortland

5h 14m

1 stop

IAD11:44 amWashington, D.C. Dulles Intl

Mar 10

IAD7:59 pmWashington, D.C. Dulles Intl

4h 00m

1 stop

PWM11:59 pmPortland

$224

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

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

Thu 3/26

11:30 am-4:25 pm

1 stop4h 55m

Washington, D.C. Dulles Intl

Tue 3/31

8:36 am-10:22 am

Nonstop1h 46m

$208

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

Thu 3/26

4:48 pm-10:59 pm

1 stop6h 11m

Washington, D.C. Dulles Intl

Tue 3/31

6:00 am-12:09 pm

1 stop6h 09m

$209

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

Thu 5/21

6:00 am-11:32 am

1 stop5h 32m

Washington, D.C. Dulles Intl

Thu 5/28

10:10 pm-11:50 pm

Nonstop1h 40m

$210

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

Thu 3/26

7:07 pm-11:19 pm

1 stop4h 12m

Washington, D.C. Dulles Intl

Tue 3/31

8:36 am-10:22 am

Nonstop1h 46m

$213

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

Thu 5/7

3:39 pm-9:11 pm

1 stop5h 32m

Washington, D.C. Dulles Intl

Mon 5/11

10:10 pm-11:59 pm

Nonstop1h 49m

$214

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

Fri 3/27

2:30 pm-7:19 pm

1 stop4h 49m

Washington, D.C. Dulles Intl

Tue 3/31

6:00 am-12:09 pm

1 stop6h 09m

$219

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

Thu 5/7

2:38 pm-6:53 pm

1 stop4h 15m

Washington, D.C. Dulles Intl

Mon 5/11

6:00 am-11:57 am

1 stop5h 57m

$224

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

Sat 3/7

7:08 pm-11:19 pm

1 stop4h 11m

Washington, D.C. Dulles Intl

Tue 3/10

12:48 pm-2:32 pm

Nonstop1h 44m

$225

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

Thu 2/26

3:10 pm-9:03 pm

1 stop5h 53m

Washington, D.C. Dulles Intl

Mon 3/2

12:39 pm-2:23 pm

Nonstop1h 44m

$229

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

Wed 3/4

6:00 am-4:28 pm

2 stops10h 28m

Washington, D.C. Dulles Intl

Tue 3/10

6:00 am-1:50 pm

2 stops7h 50m

$234

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

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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 $385. 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 $594.

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 $411 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 $595 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 $326 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 $235 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 February 2026, prices for Portland, Maine 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, 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	$268
Fastest flight time	1h 44m
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 $268. 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 $342.

The fastest flight from Portland, Maine to Washington, D.C. Dulles Intl Airport takes 1h 44m

Direct flights go from Portland, Maine to Washington, D.C. Dulles Intl Airport every day.

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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 44m 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 February 2026, there are 2 operators 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 (27.51% of total bookings). The next most popular plane models are Embraer 175 (Enhanced Winglets) (10.36%), Boeing 737-800 Passenger/BBJ2 (winglets) (6.80%), and Airbus A319 (6.80%).
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 (97% of total bookings). The next most popular airline is Delta (3%).

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
Delta	PriceFrom $176	Free Cancellation	Rating 7.9 8,191 reviews		Search Delta flights
United Airlines	PriceFrom $206	Free Cancellation	Rating 7.4 9,286 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 $206 round-trip, up to an average price of $327. Our users have rated United Airlines at 7.4/10.

Alexandria

National Harbor

Gettysburg

Arlington

Winchester

Waldorf

Woodbridge

Laurel

Colonial Beach

Tysons

Silver Spring

Towson

Fredericksburg

Gaithersburg

Rockville

Manassas

Springfield

Sterling

Fairfax

Linthicum Heights

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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 $131

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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

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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How to get the cheapest flight ticket from Portland, Maine to 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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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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Why should I use momondo to find a flight deal from Portland to Washington, D.C.?

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

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

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

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