What are the cheapest airlines flying from Portland, Maine to Washington, D.C. Dulles Intl Airport round-trip?

Cheapflights users have booked flights from Portland, Maine to Washington, D.C. Dulles Intl Airport round-trip from $208. Another airline that can offer you cheap pricing is United Airlines. Users have found that Delta is 36% cheaper than the other options available to this destination.

What are the cheapest airlines to fly from Portland, Maine to Washington, D.C. Dulles Intl Airport one-way?

For one-way options, check prices for Delta. According to our data, you can fly for as low as $155. Users have also found prices from $157 and $161 on Frontier and United Airlines, respectively.

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 2.6 in.

If weather is an important factor for your trip to Washington, D.C. Dulles Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

What are the cheapest flights from Portland, Maine to Washington, D.C. Dulles Intl Airport?

On average you can expect to pay $703 for a flight from Portland, Maine to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is $149 while the most popular route, (Portland - Washington, D.C. Dulles Intl) is currently priced at $173.

What are the most reliable airlines from Portland, Maine to Washington, D.C. Dulles Intl Airport?

Consider Avianca (97%), GoJet (91%) or CommutAir (88%) when booking your flight. These represent the most reliable airlines when flying from Portland, Maine to Washington, D.C. Dulles Intl Airport.

What is the cheapest day to fly round-trip from Portland, Maine to Washington, D.C. Dulles Intl Airport?

Travelers have found that booking a Thursday departure is the best way to save up to 36% on the cost of booking your flights compared to booking on days of the week where this route is of high demand.

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

September is one of the best times of the year to fly to Washington, D.C. Dulles Intl Airport from Portland, Maine. Prices for September average $285 per person but you can even find prices for as low as $179. The most expensive prices can be found in the month of June. Opting for a September flight can save you 18% on your journey compared to booking in June

What airport do you fly from for flights from Portland to Washington, D.C. Dulles Intl?

Located just 2.9 mi from the city center, Portland is the airport most travelers will use when flying to Washington, D.C. Dulles Intl from Portland. Booking flights from Portland (PWM) to Washington, D.C. Dulles Intl should be relatively easy as there are 4 daily outbound flights to Washington, D.C. Dulles Intl from 1 airline.

Can I find deals for flights from Portland to Dulles Intl that include hotel bookings?

Yes. In addition to deals on Portland to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Portland to Dulles Intl?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to Dulles Intl.

Can I find deals for business class flights from Portland to Dulles Intl?

Yes. Cheapflights offers flight deals from Portland to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$155+ Flights from Portland, ME to Washington, D.C. Dulles Intl Airport

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Cheapflights Tip: The best prices from Portland to Washington, D.C. Dulles Intl are usually found in October or March, booked 49 days in advance, depart on a Friday or Thursday and return on a Tuesday

Cheap flight deals from Portland to Dulles Intl

Round-trip from	$208 (Delta)
One-way from	$155 (Delta)
Popular in	April
Cheapest in	October
Average price	$309
Good round-trip deal	$363 or less
Good one-way deal	$215 or less

From Portland to Washington, D.C. Dulles Intl

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One-way flight from Portland to Washington, D.C. Dulles Intl

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High demand for flights, 0% potential price rise

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Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).

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Average for round-trip flights in July 2025

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Price to beat on a round-trip flight from Portland to Washington, D.C. Dulles Intl.

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Price to beat on a one-way flight from Portland to Washington, D.C. Dulles Intl.

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Cheapest flights from Portland to Dulles Intl
Explore the most affordable flight options available from Portland to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 1, 2025.

Wed 8/136:31 amPWM - IAD

1 stop5h 31mDelta

Thu 8/148:23 pmIAD - PWM

1 stop4h 25mDelta

Deal found 6/29

$208

Wed 8/207:26 pmPWM - IAD

Nonstop1h 49mUnited Airlines

Mon 9/15:34 pmIAD - PWM

Nonstop1h 55mUnited Airlines

Deal found 6/30

$217

Best flights from Portland to Dulles Intl
Discover carefully curated flight deals from Portland to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 1, 2025.

Wed 8/136:31 amPWM - IAD

1 stop5h 31mDelta

Thu 8/148:23 pmIAD - PWM

1 stop4h 25mDelta

Deal found 6/29

$208

Wed 8/207:26 pmPWM - IAD

Nonstop1h 49mUnited Airlines

Mon 9/15:34 pmIAD - PWM

Nonstop1h 55mUnited Airlines

Deal found 6/30

$217

Last-minute flights from Portland to Dulles Intl
Discover last-minute flight deals from Portland to Dulles Intl. Data last updated July 1, 2025 and is based on user searches.

Tue 7/86:01 pmPWM - IAD

1 stop5h 57mAmerican Airlines

Thu 7/106:35 amIAD - PWM

1 stop7h 09mAmerican Airlines

Deal found 6/30

$503

Thu 7/107:15 pmPWM - IAD

Nonstop1h 55mUnited Airlines

Tue 7/1510:14 pmIAD - PWM

Nonstop1h 45mUnited Airlines

Deal found 6/30

$279

Thu 7/1012:40 pmPWM - IAD

2 stops20h 43mMultiple Airlines

Sun 7/1311:58 amIAD - PWM

3 stops26h 09mMultiple Airlines

Deal found 6/29

$670

Fri 7/116:30 amPWM - IAD

1 stop5h 32mDelta

Sat 7/198:31 pmIAD - PWM

1 stop4h 26mDelta

Deal found 6/30

$239

Fri 7/183:50 pmPWM - IAD

1 stop5h 12mUnited Airlines

Sun 7/2010:14 pmIAD - PWM

Nonstop1h 45mUnited Airlines

Deal found 6/30

$232

Wed 7/236:30 amPWM - IAD

1 stop5h 32mDelta

Sat 7/268:31 pmIAD - PWM

1 stop4h 26mDelta

Deal found 6/30

$209

Tue 7/296:01 pmPWM - IAD

1 stop5h 57mAmerican Airlines

Tue 8/59:03 amIAD - PWM

2 stops11h 21mAmerican Airlines

Deal found 6/29

$326

One-way flights from Portland to Dulles Intl
Search for one-way flight options from Portland to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated July 1, 2025.

Tue 10/286:30 amPWM - IAD

2 stops10h 52mDelta

Deal found 7/1

$155

Sat 7/126:58 pmPWM - IAD

1 stop24h 03mFrontier

Deal found 6/30

$157

Sat 11/15:30 amPWM - IAD

Nonstop1h 58mUnited Airlines

Deal found 6/30

$161

Mon 9/151:57 pmPWM - IAD

1 stop4h 54mAmerican Airlines

Deal found 7/1

$192

Thu 8/712:46 pmPWM - IAD

2 stops20h 37mMultiple Airlines

Deal found 6/30

$218

Cheapflights Fare Finder

Use the filters below to find and compare flights from Portland 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

Wed 8/13

6:31 am-12:02 pm

1 stop5h 31m

Washington, D.C. Dulles Intl

Thu 8/14

8:23 pm-12:48 am

1 stop4h 25m

$208

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

Wed 8/20

7:26 pm-9:15 pm

Nonstop1h 49m

Washington, D.C. Dulles Intl

Mon 9/1

5:34 pm-7:29 pm

Nonstop1h 55m

$217

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

Fri 10/31

6:30 am-5:22 pm

2 stops10h 52m

$156

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

Sat 7/12

6:58 pm-7:01 pm

1 stop24h 03m

$157

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

Sat 11/1

5:30 am-7:28 am

Nonstop1h 58m

$161

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

Mon 10/20

2:42 pm-7:45 pm

1 stop5h 03m

$192

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

Thu 8/7

12:46 pm-9:23 am

2 stops20h 37m

$218

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/30

Best time to book a flight from Portland to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Portland with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Portland to Washington, D.C. Dulles Intl Airport

How far ahead should I book a flight from Portland, Maine to Washington, D.C. Dulles Intl Airport?

The best time to book flights from Portland, Maine to Washington, D.C. Dulles Intl Airport is 49 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Portland, Maine to Washington, D.C. Dulles Intl Airport?

Currently, August is the cheapest month in which you can book a flight from Portland, Maine to Washington, D.C. Dulles Intl Airport (average of $309). Flying from Portland, Maine to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $345). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from PWM to IAD?

A simple way to save on the total cost of your ticket is to fly from Portland, Maine to Washington, D.C. Dulles Intl Airport in the evening. If you’re flexible enough to do this you can expect to save up to 35% on your trip compared to booking a flight in the afternoon.

What is the cheapest day to fly from Portland, Maine to Washington, D.C. Dulles Intl Airport?

Travelers seeking maximum savings on their Portland, Maine to Washington, D.C. Dulles Intl Airport flight should consider departing on Monday afternoons when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Portland, Maine to Washington, D.C. Dulles Intl Airport

The most flights from PWM to IAD are scheduled on a Monday (6 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (3 on average).

Reviews of airlines servicing Dulles Intl

Read reviews from past customers who have flown Delta, United Airlines, and American Airlines from Portland to Washington, D.C. Dulles Intl Airport. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,973 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Delta

8.0

Very good

7,973 reviews

Delta

8.0

Very good

7,973 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

United Airlines

7.4

Good

8,852 reviews

Delta

8.0

Very good

7,973 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

American Airlines

7.2

Good

10,000 reviews

Delta

8.0

Very good

7,973 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Frontier

5.9

Fair

3,289 reviews

Delta

8.0

Very good

7,973 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

What airport do you fly from for flights from Portland to Washington, D.C. Dulles Intl?
Located just 2.9 mi from the city center, Portland is the airport most travelers will use when flying to Washington, D.C. Dulles Intl from Portland. Booking flights from Portland (PWM) to Washington, D.C. Dulles Intl should be relatively easy as there are 4 daily outbound flights to Washington, D.C. Dulles Intl from 1 airline.
What are the cheapest airlines flying from Portland, Maine to Washington, D.C. Dulles Intl Airport round-trip?
Cheapflights users have booked flights from Portland, Maine to Washington, D.C. Dulles Intl Airport round-trip from $208. Another airline that can offer you cheap pricing is United Airlines. Users have found that Delta is 36% cheaper than the other options available to this destination.
What are the cheapest airlines to fly from Portland, Maine to Washington, D.C. Dulles Intl Airport one-way?
For one-way options, check prices for Delta. According to our data, you can fly for as low as $155. Users have also found prices from $157 and $161 on Frontier and United Airlines, respectively.
What are the most reliable airlines from Portland, Maine to Washington, D.C. Dulles Intl Airport?
Consider Avianca (97%), GoJet (91%) or CommutAir (88%) when booking your flight. These represent the most reliable airlines when flying from Portland, Maine to Washington, D.C. Dulles Intl Airport.
What are the cheapest flights from Portland, Maine to Washington, D.C. Dulles Intl Airport?
On average you can expect to pay $703 for a flight from Portland, Maine to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is $149 while the most popular route, (Portland - Washington, D.C. Dulles Intl) is currently priced at $173.
Can I find deals for flights from Portland to Dulles Intl that include hotel bookings?
Yes. In addition to deals on Portland to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Portland to Dulles Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to Dulles Intl.
Can I find deals for business class flights from Portland to Dulles Intl?
Yes. Cheapflights offers flight deals from Portland to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Portland, Maine to Washington, D.C. Dulles Intl Airport?
Currently, August is the cheapest month in which you can book a flight from Portland, Maine to Washington, D.C. Dulles Intl Airport (average of $309). Flying from Portland, Maine to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $345). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Top airline flying from Portland to Dulles Intl

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$207	Average$320	FlexibilityNo cancel fee	On-time69%

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$155+ Cheap flights from Portland, ME (PWM) to Dulles Intl (IAD)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/28. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Portland to Dulles Intl with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from Portland to Washington, D.C. Dulles Intl are usually found in October or March, booked 49 days in advance, depart on a Friday or Thursday and return on a Tuesday

Cheap flight deals from Portland to Dulles Intl

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Portland to Dulles Intl

Cheapest flights from Portland to Dulles IntlExplore the most affordable flight options available from Portland to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 1, 2025.

Explore the most affordable flight options available from Portland to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 1, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Portland to Washington, D.C. Dulles Intl Airport that are best for you.

Best time to book a flight from Portland to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Portland with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Portland to Washington, D.C. Dulles Intl Airport

How far ahead should I book a flight from Portland, Maine to Washington, D.C. Dulles Intl Airport?

Use this chart to determine the optimal time to book a round-trip flight from Portland to Dulles Intl. Price data was last updated on June 27, 2025.

What is the cheapest month to book a flight from Portland, Maine to Washington, D.C. Dulles Intl Airport?

What is the cheapest time of day to fly from PWM to IAD?

Find hourly flight availability from Portland to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 1, 2025.

What is the cheapest day to fly from Portland, Maine to Washington, D.C. Dulles Intl Airport?

Use this chart to determine the cheapest time to fly round-trip from Portland to Dulles Intl. Price data was last updated on June 29, 2025.

Weekly flight availability from Portland, Maine to Washington, D.C. Dulles Intl Airport

Explore weekly flight availability from Portland to Dulles Intl. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated July 1, 2025.

Reviews of airlines servicing Dulles Intl

Related info for your journey

Find useful and relevant information for your journey from Portland to Dulles Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly from for flights from Portland to Washington, D.C. Dulles Intl?

What are the cheapest airlines flying from Portland, Maine to Washington, D.C. Dulles Intl Airport round-trip?

What are the cheapest airlines to fly from Portland, Maine to Washington, D.C. Dulles Intl Airport one-way?

What are the most reliable airlines from Portland, Maine to Washington, D.C. Dulles Intl Airport?

What are the cheapest flights from Portland, Maine to Washington, D.C. Dulles Intl Airport?

Can I find deals for flights from Portland to Dulles Intl that include hotel bookings?

How can I find direct flights from Portland to Dulles Intl?

Can I find deals for business class flights from Portland to Dulles Intl?

What is the cheapest month to book a flight from Portland, Maine to Washington, D.C. Dulles Intl Airport?

Traveling to a place near Portland?

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Cheapest flights from Portland to Dulles Intl
Explore the most affordable flight options available from Portland to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 1, 2025.