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Washington, D.C.

$109+ Cheap flights from Portland, ME (PWM) to Washington, D.C. (WAS)

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 9/5. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — WAS
Aug 23 — Aug 301
Sun 8/23
Sun 8/30
1 adult, Economy
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1. Tell us where you want to go

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Cheapflights Tip: The best prices from Portland to Washington, D.C. are usually found in February or September, booked 48 days in advance, depart on a Thursday or Friday and return on a Saturday

Cheap flight deals from Portland to Washington, D.C.

Cheapest flights from Portland to Washington, D.C.
Explore the most affordable flight options available from Portland to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 24, 2026.

This Southwest deal was found by Cheapflights users on 7/22. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/15:45 am
PWM
-
BWI
Nonstop1h 40m
Southwest
Wed 9/28:15 am
BWI
-
PWM
Nonstop1h 40m
Southwest
Deal found 7/22$217
This Southwest deal was found by Cheapflights users on 7/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/33:40 pm
PWM
-
BWI
Nonstop1h 45m
Southwest
Sun 9/63:05 pm
BWI
-
PWM
Nonstop1h 30m
Southwest
Deal found 7/21$222
This Delta deal was found by Cheapflights users on 7/23. 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.
Sat 11/144:50 pm
PWM
-
BWI
1 stop6h 05m
Delta
Wed 11/1811:00 am
BWI
-
PWM
1 stop5h 10m
Delta
Deal found 7/23$227
This Southwest deal was found by Cheapflights users on 7/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/55:40 am
PWM
-
BWI
Nonstop1h 35m
Southwest
Mon 9/78:10 am
BWI
-
PWM
Nonstop1h 40m
Southwest
Deal found 7/19$228
This Delta deal was found by Cheapflights users on 7/23. 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.
Tue 10/206:28 am
PWM
-
BWI
2 stops10h 23m
Delta
Tue 10/276:10 am
BWI
-
PWM
1 stop5h 57m
Delta
Deal found 7/23$232
This Southwest deal was found by Cheapflights users on 7/20. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/195:45 am
PWM
-
BWI
Nonstop1h 40m
Southwest
Wed 8/267:40 pm
BWI
-
PWM
Nonstop1h 30m
Southwest
Deal found 7/20$239
This United Airlines deal was found by Cheapflights users on 7/22. 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 10/237:25 pm
PWM
-
IAD
Nonstop1h 55m
United Airlines
Mon 10/2610:10 pm
IAD
-
PWM
Nonstop1h 49m
United Airlines
Deal found 7/22$249
This Delta deal was found by Cheapflights users on 7/20. 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.
Tue 9/154:45 pm
PWM
-
BWI
1 stop4h 45m
Delta
Tue 9/226:10 am
BWI
-
PWM
1 stop6h 00m
Delta
Deal found 7/20$249
This American Airlines deal was found by Cheapflights users on 7/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/196:02 am
PWM
-
DCA
Nonstop1h 48m
American Airlines
Tue 8/255:39 pm
DCA
-
PWM
1 stop3h 42m
American Airlines
Deal found 7/19$249
This Delta deal was found by Cheapflights users on 7/23. 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.
Sat 8/156:10 am
PWM
-
DCA
1 stop5h 06m
Delta
Tue 8/189:12 am
DCA
-
PWM
2 stops7h 38m
Delta
Deal found 7/23$252
This Delta deal was found by Cheapflights users on 7/20. 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.
Fri 9/114:45 pm
PWM
-
IAD
1 stop6h 29m
Delta
Sun 9/136:26 pm
IAD
-
PWM
1 stop5h 30m
Delta
Deal found 7/20$253
This United Airlines deal was found by Cheapflights users on 7/21. 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 9/36:00 am
PWM
-
DCA
1 stop3h 46m
United Airlines
Sun 9/61:01 pm
DCA
-
PWM
1 stop5h 28m
United Airlines
Deal found 7/21$253

Find flight deals from Portland to Washington, D.C.

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PWM) to Washington, D.C. (WAS). 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 July 24, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$217
(Southwest)

One-way from

$109
(Southwest)

Popular in

June

Cheapest in

February

Average price

$319

Good round-trip deal

$278 or less

Good one-way deal

$220 or less
Provider with most accurate pricing for Portland-Washington, D.C. (WAS) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Portland-Washington, D.C. (WAS) flights.
Search Deals
From Portland to Washington, D.C. (WAS)
Search Deals
One-way flight from Portland to Washington, D.C. (WAS)
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($29 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
Price to beat on a round-trip flight from Portland to Washington, D.C. (WAS).
Search Deals
Price to beat on a one-way flight from Portland to Washington, D.C. (WAS).
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Portland to Washington, D.C. 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 July 24, 2026.
Use the filters below to find and compare flights from Portland to Washington, D.C. that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandBaltimore

PWM - BWI

PWMBWI

Portland

Tue 10/20

6:28 am-4:51 pm

2 stops10h 23m

Baltimore/Washington

Tue 10/27

6:10 am-12:07 pm

1 stop5h 57m

$232

PortlandBaltimore

PWM - BWI

PWMBWI

Portland

Wed 8/19

5:45 am-7:25 am

Nonstop1h 40m

Baltimore/Washington

Wed 8/26

7:40 pm-9:10 pm

Nonstop1h 30m

$239

PortlandBaltimore

PWM - BWI

PWMBWI

Portland

Wed 8/19

10:30 am-12:10 pm

Nonstop1h 40m

Baltimore/Washington

Tue 8/25

7:40 pm-9:10 pm

Nonstop1h 30m

$239
Quickest round-trip

PortlandBaltimore

PWM - BWI

PWMBWI

Portland

Sat 8/29

5:40 am-7:15 am

Nonstop1h 35m

Baltimore/Washington

Mon 8/31

8:55 pm-10:25 pm

Nonstop1h 30m

$239

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

Wed 9/9

3:43 pm-9:28 pm

1 stop5h 45m

Washington, D.C. Dulles Intl

Mon 9/14

5:30 pm-7:24 pm

Nonstop1h 54m

$249

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

Thu 9/24

7:25 pm-9:20 pm

Nonstop1h 55m

Washington, D.C. Dulles Intl

Sat 9/26

5:30 pm-11:28 pm

1 stop5h 58m

$249

PortlandWashington, D.C.

PWM - DCA

PWMDCA

Portland

Sat 8/15

6:10 am-11:16 am

1 stop5h 06m

Washington, D.C. Reagan-National

Tue 8/18

9:12 am-4:50 pm

2 stops7h 38m

$252

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

Fri 10/9

6:04 am-11:50 am

1 stop5h 46m

Washington, D.C. Dulles Intl

Mon 10/12

6:25 pm-12:10 am

1 stop5h 45m

$258

PortlandWashington, D.C.

PWM - DCA

PWMDCA

Portland

Sat 8/15

6:10 am-11:16 am

1 stop5h 06m

Washington, D.C. Reagan-National

Fri 8/21

7:40 pm-11:30 pm

1 stop3h 50m

$258

PortlandWashington, D.C.

PWM - IAD

PWMIAD

Portland

Thu 9/17

6:06 am-11:26 am

1 stop5h 20m

Washington, D.C. Dulles Intl

Sun 9/20

5:30 pm-7:24 pm

Nonstop1h 54m

$259

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/23

Showing 1-10 of 60 resultsSorted by cheapest first
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Compare providers for flights from Portland to Washington, D.C.

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Portland to Washington, D.C. in July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Portland, Maine-Washington, D.C. flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Portland, Maine-Washington, D.C. flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Portland, Maine-Washington, D.C. flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Portland, Maine-Washington, D.C. flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Portland, Maine-Washington, D.C. flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Portland to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. 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.

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

Currently, September is the cheapest month in which you can book a flight from Portland, Maine to Washington, D.C. (average of $276). Flying from Portland, Maine to Washington, D.C. in March is currently the most expensive (average of $408). 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 WAS?

Find hourly flight availability from Portland to Washington, D.C.. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 24, 2026.

It’s optimal to fly from Portland, Maine to Washington, D.C. in the morning. By choosing this option you can save up to 25% on the cost of your flight, compared to a flight in the evening.

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

Explore weekly flight availability from Portland to Washington, D.C.. 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 24, 2026.

The most flights from PWM to WAS are scheduled on a Monday (10 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (1 on average).

How much does it cost to fly round-trip from Portland, Maine to Washington, D.C.?

Airfare is below average for this route at the moment.
Portland, Maine to Washington, D.C. flights typically cost between $254 and $432 in September.
The cheapest round-trip price found within the last 5 days was $217 on Southwest (Sep 1-Sep 2).

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

Booking 73 days in advance of your planned departure date is, on average, the best time to get cheap flights from Portland, Maine to Washington, D.C.. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Use this chart to determine the cheapest time to fly round-trip from Portland to Washington, D.C.. Price data was last updated on July 18, 2026.

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

Reviews of airlines servicing Washington, D.C.

Get insights into the airlines that provide service to Washington, D.C.. 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 Washington, D.C.. Reviews last updated July 24, 2026.
Read through reviews of airlines operating flights from Portland to Washington, D.C., such as Southwest,United Airlines, andAmerican Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,238 reviews

Crew

8.6

Food

7.0

Boarding

8.1

Overall

8.0

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.
Southwest
8.0
Very good
4,238 reviews
Southwest
8.0
Very good
4,238 reviews

Crew

8.6

Food

7.0

Boarding

8.1

Overall

8.0

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.
United Airlines
7.4
Good
10,026 reviews
Southwest
8.0
Very good
4,238 reviews

Crew

8.6

Food

7.0

Boarding

8.1

Overall

8.0

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.
American Airlines
7.1
Good
11,834 reviews
Southwest
8.0
Very good
4,238 reviews

Crew

8.6

Food

7.0

Boarding

8.1

Overall

8.0

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.

Related info for your journey

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

    For a flight from Portland to Washington, D.C., you will be flying from Portland. Portland (PWM) is just 2.9 mi from the center of the city. Portland is the only Portland airport and it handles 7 outbound flights to Washington, D.C. per day. 3 airlines have flights to Washington, D.C. from Portland on a regular basis.

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

    Delta, Southwest, and United Airlines can get you from Portland, Maine to Washington, D.C. in just under 1h 40m. Your travel time can differ by up to 8h 43m. Portland, Maine and Washington, D.C. are separated by a distance of 451 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    According to our current data, American Airlines ($189), and United Airlines ($204) offers the cheapest pricing from Portland, Maine to Washington, D.C.. American Airlines is currently priced 37% below the average price you’ll pay for this route.

  • What are the most popular routes from Portland, Maine to Washington, D.C.?

    The most popular flight routes from Portland, Maine to Washington, D.C. are Portland - Washington, D.C. Dulles Intl, Portland - Washington, D.C. Reagan-National and Portland - Baltimore/Washington.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Portland, Maine to Washington, D.C. on time: United Airlines (92%), Republic Airways (90%), Avianca (89%).

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

    Looking at all options, your cheapest flight can be booked for $191. While the most popular route (Portland - Washington, D.C. Dulles Intl) can be booked for $217 on average, our data indicates $439 when flying from Portland, Maine to Washington, D.C..

  • Can I find deals for flights from Portland to Washington, D.C. that include hotel bookings?

    Yes. In addition to deals on Portland to Washington, D.C. flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Portland to Washington, D.C.?

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

  • Can I find deals for business class flights from Portland to Washington, D.C.?

    Yes. Cheapflights offers flight deals from Portland to Washington, D.C. 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.?

    Currently, September is the cheapest month in which you can book a flight from Portland, Maine to Washington, D.C. (average of $276). Flying from Portland, Maine to Washington, D.C. in March is currently the most expensive (average of $408). 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 Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
Tysons
Arlington
Owings Mills
Springfield
Lanham
Reston
Herndon
Rockville
Hyattsville
Fredericksburg
Falls Church
Hanover
Manassas
Laurel
Clinton
Hunt Valley
Cordova
Woodbridge
Largo

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Top 3 airlines flying from Portland to Washington, D.C.

Discover the top 3 airlines that operate flights from Portland to Washington, D.C.. 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 July 24, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$189Average$337FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$204Average$373FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$271Average$391FlexibilityNo cancel feeOn-time63%

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