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$119+ Cheap flights from Dulles Intl (IAD) to Portland, ME (PWM)

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 10/21. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — PWM
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
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Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to Portland are usually found in May or December, booked 49 days in advance, depart on a Tuesday or Saturday and return on a Friday

Cheap flight deals from Dulles Intl to Portland

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Portland (PWM). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 17, 2025.

Round-trip from

$219
(Delta)

One-way from

$119
(United Airlines)

Popular in

October

Cheapest in

May

Average price

$349

Good round-trip deal

$269 or less

Good one-way deal

$168 or less
From Washington, D.C. Dulles Intl to Portland
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One-way flight from Washington, D.C. Dulles Intl to Portland
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Highest demand for flights based on searches. 4% potential increase in price ($14 potential increase over avg. RT price).
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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 September 2025
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Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to Portland.
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Price to beat on a one-way flight from Washington, D.C. Dulles Intl to Portland.
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Find flight deals from Dulles Intl to Portland

Cheapest flights from Dulles Intl to Portland
Explore the most affordable flight options available from Dulles Intl to Portland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2025.

This Delta deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/28:17 pmIAD - PWM
1 stop4h 17mDelta
Sat 10/46:33 amPWM - IAD
1 stop5h 24mDelta
Deal found 9/15$219
This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/15:33 pmIAD - PWM
1 stop5h 44mUnited Airlines
Tue 11/47:22 pmPWM - IAD
Nonstop1h 56mUnited Airlines
Deal found 9/15$221
This United Airlines deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/28:16 amIAD - PWM
Nonstop1h 43mUnited Airlines
Sat 10/45:45 amPWM - IAD
Nonstop1h 49mUnited Airlines
Deal found 9/17$222
This United Airlines deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/812:35 pmIAD - PWM
Nonstop1h 44mUnited Airlines
Tue 11/117:22 pmPWM - IAD
Nonstop1h 56mUnited Airlines
Deal found 9/17$223
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/2710:09 pmIAD - PWM
Nonstop1h 50mUnited Airlines
Tue 9/302:34 pmPWM - IAD
Nonstop1h 56mUnited Airlines
Deal found 9/16$224
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/148:20 amIAD - PWM
Nonstop1h 44mUnited Airlines
Sun 11/165:30 amPWM - IAD
Nonstop2h 00mUnited Airlines
Deal found 9/16$235
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/710:09 pmIAD - PWM
Nonstop1h 50mUnited Airlines
Wed 10/89:59 amPWM - IAD
Nonstop1h 49mUnited Airlines
Deal found 9/16$237
This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/2710:09 pmIAD - PWM
Nonstop1h 50mUnited Airlines
Mon 9/295:45 amPWM - IAD
Nonstop1h 49mUnited Airlines
Deal found 9/15$238
This Delta deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/58:17 pmIAD - PWM
1 stop4h 17mDelta
Wed 10/226:50 amPWM - IAD
1 stop5h 07mDelta
Deal found 9/14$239
This United Airlines deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2912:35 pmIAD - PWM
Nonstop1h 44mUnited Airlines
Sat 11/13:00 pmPWM - IAD
1 stop5h 57mUnited Airlines
Deal found 9/17$243

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl to Portland 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, Cheapflights users made 2,558,603 searches. Data last updated September 17, 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Portland that are best for you.

Fly from

Dulles Intl

Fly to

Portland

Route

Depart

Return

Price

Washington, D.C.Portland

IAD - PWM

IADPWM

Washington, D.C. Dulles Intl

Sat 9/27

10:09 pm-11:59 pm

Nonstop1h 50m

Portland

Tue 9/30

2:34 pm-4:30 pm

Nonstop1h 56m

$224

Washington, D.C.Portland

IAD - PWM

IADPWM

Washington, D.C. Dulles Intl

Fri 10/17

7:59 pm-12:05 am

1 stop4h 06m

Portland

Tue 10/21

4:48 pm-11:00 pm

1 stop6h 12m

$239

Washington, D.C.Portland

IAD - PWM

IADPWM

Washington, D.C. Dulles Intl

Sat 10/18

7:59 pm-12:05 am

1 stop4h 06m

Portland

Wed 10/22

5:42 am-4:29 pm

2 stops10h 47m

$244

Washington, D.C.Portland

IAD - PWM

IADPWM

Washington, D.C. Dulles Intl

Sat 10/11

10:09 pm-11:59 pm

Nonstop1h 50m

Portland

Fri 10/17

5:45 am-7:34 am

Nonstop1h 49m

$249

Washington, D.C.Portland

IAD - PWM

IADPWM

Washington, D.C. Dulles Intl

Sun 10/19

10:09 pm-11:59 pm

Nonstop1h 50m

Portland

Sat 10/25

7:25 pm-9:15 pm

Nonstop1h 50m

$249

Washington, D.C.Portland

IAD - PWM

IADPWM

Washington, D.C. Dulles Intl

Sun 10/5

10:09 pm-11:59 pm

Nonstop1h 50m

Portland

Fri 10/17

5:45 am-7:34 am

Nonstop1h 49m

$249

Washington, D.C.Portland

IAD - PWM

IADPWM

Washington, D.C. Dulles Intl

Sat 10/25

12:42 pm-2:33 pm

Nonstop1h 51m

Portland

Wed 10/29

7:22 pm-9:18 pm

Nonstop1h 56m

$249

Washington, D.C.Portland

IAD - PWM

IADPWM

Washington, D.C. Dulles Intl

Tue 10/7

12:42 pm-2:33 pm

Nonstop1h 51m

Portland

Thu 10/23

9:59 am-11:48 am

Nonstop1h 49m

$249

Washington, D.C.Portland

IAD - PWM

IADPWM

Washington, D.C. Dulles Intl

Sat 10/4

10:09 pm-11:59 pm

Nonstop1h 50m

Portland

Wed 10/8

7:25 pm-9:15 pm

Nonstop1h 50m

$254

Washington, D.C.Portland

IAD - PWM

IADPWM

Washington, D.C. Dulles Intl

Sat 10/11

10:09 pm-11:59 pm

Nonstop1h 50m

Portland

Tue 10/21

5:41 pm-10:28 pm

1 stop4h 47m

$259

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 20 results
1
2

Best time to book a flight from Dulles Intl to Portland

Have a flexible travel schedule? Discover the best time to fly to Portland from Dulles Intl 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 Washington, D.C. Dulles Intl Airport to Portland

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

Use this chart to determine the optimal time to book a round-trip flight from Dulles Intl to Portland. Price data was last updated on September 12, 2025.

The best time to book flights from Washington, D.C. Dulles Intl Airport to Portland, Maine 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 Washington, D.C. Dulles Intl Airport to Portland, Maine?

Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Portland, Maine (average of $296). Flying from Washington, D.C. Dulles Intl Airport to Portland, Maine in July is currently the most expensive (average of $394). 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 IAD to PWM?

Find hourly flight availability from Dulles Intl to Portland. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 17, 2025.

One of the essential ways to save on airfare from Washington, D.C. Dulles Intl Airport to Portland, Maine is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the evening could potentially save you up to 24% on airfare.

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

Use this chart to determine the cheapest time to fly round-trip from Dulles Intl to Portland. Price data was last updated on September 14, 2025.

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

Reviews of airlines servicing Portland

Get insights into the airlines that provide service to Portland. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Portland. Reviews last updated September 17, 2025.
Peruse reviews from past customers who have flown with United Airlines from Washington, D.C. Dulles Intl Airport to Portland to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,926 reviews

Entertainment

7.1

Boarding

7.7

Overall

7.4

Comfort

7.3

Food

6.6

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
United Airlines
7.4
Good
8,926 reviews
United Airlines
7.4
Good
8,926 reviews

Entertainment

7.1

Boarding

7.7

Overall

7.4

Comfort

7.3

Food

6.6

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to Portland. 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 into for flights to Portland from Washington, D.C. Dulles Intl?

    If you book a flight to Portland from Washington, D.C. Dulles Intl, you will be flying to Portland, which is the city’s only airport. Portland (PWM) is located 2.9 mi from the center of Portland. There are 4 flights from Washington, D.C. Dulles Intl to Portland per day from 1 airline.

  • How long is the flight from Washington, D.C. Dulles Intl Airport to Portland, Maine?

    Departing from Washington, D.C. Dulles Intl Airport to Portland, Maine will take you 1h 50m. Washington, D.C. Dulles Intl Airport and Portland, Maine are separated by a distance of 492 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    Cheapflights users have booked flights from Washington, D.C. Dulles Intl Airport to Portland, Maine round-trip from $217. United Airlines is currently priced 38% below the average price you’ll pay for this route.

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

    Consider GoJet (100%), Copa Airlines (97%) or United Airlines (87%) when booking your flight. These represent the most reliable airlines when flying from Washington, D.C. Dulles Intl Airport to Portland, Maine.

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

    On average you can expect to pay $490 for a flight from Washington, D.C. Dulles Intl Airport to Portland, Maine. The cheapest flight overall is $112 while the most popular route, (Washington, D.C. Dulles Intl - Portland) is currently priced at $189.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Dulles Intl to Portland 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 Washington, D.C. Dulles Intl Airport to Portland, Maine?

    Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Portland, Maine (average of $296). Flying from Washington, D.C. Dulles Intl Airport to Portland, Maine in July is currently the most expensive (average of $394). 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.

See more FAQs

Traveling to a place near Portland?

Book flights to Portland if you plan to visit one of these locations
Brunswick
North Conway
Auburn
Conway
Lewiston

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Top airline flying from Dulles Intl to Portland

Discover the top airline that operate flights from Dulles Intl to Portland. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$217Average$359FlexibilityNo cancel feeOn-time69%

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