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Washington, D.C.

$358+ Cheap flights from Porto (OPO) 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 3/24. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — WAS
Jan 15 — Jan 221
Thu 1/15
Thu 1/22
1 adult, Economy
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Cheap flight deals from Porto to Washington, D.C.

Cheapest flights from Porto to Washington, D.C.
Explore the most affordable flight options available from Porto to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 16, 2025.

This United Airlines deal was found by Cheapflights users on 12/15. 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.
Wed 12/246:00 amOPO - IAD
1 stop13h 35mUnited Airlines
Sat 1/39:00 amIAD - OPO
2 stops25h 05mUnited Airlines
Deal found 12/15$829
This United Airlines deal was found by Cheapflights users on 12/16. 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.
Wed 12/2412:30 pmOPO - DCA
2 stops39h 05mUnited Airlines
Sat 1/38:40 pmDCA - OPO
2 stops34h 00mUnited Airlines
Deal found 12/16$1,014
This Gotogate deal was found by Cheapflights users on 12/15. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:00 pmOPO - IAD
1 stop26h 15mTAP AIR PORTUGAL
Sun 1/410:30 pmIAD - OPO
1 stop18h 30mTAP AIR PORTUGAL
Deal found 12/15$1,082
This Delta deal was found by Cheapflights users on 12/15. 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.
Wed 12/3111:25 amOPO - BWI
2 stops17h 06mDelta
Sun 1/45:46 pmBWI - OPO
2 stops16h 39mDelta
Deal found 12/15$1,111
This Mytrip deal was found by Cheapflights users on 12/15. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/314:05 pmOPO - IAD
2 stops28h 10mMultiple Airlines
Sun 1/410:30 pmIAD - OPO
2 stops19h 30mMultiple Airlines
Deal found 12/15$1,129
This AirNGo deal was found by Cheapflights users on 12/15. 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 AirNGo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/318:40 pmOPO - DCA
2 stops27h 00mBritish Airways
Sun 1/42:00 pmDCA - OPO
2 stops46h 35mBritish Airways
Deal found 12/15$1,290
This Air Canada deal was found by Cheapflights users on 12/15. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/248:55 amOPO - DCA
2 stops14h 10mAir Canada
Sat 1/36:00 amDCA - OPO
2 stops27h 00mAir Canada
Deal found 12/15$1,304
This Cheapflightsfares deal was found by Cheapflights users on 12/16. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/247:20 pmOPO - IAD
2 stops29h 55mSWISS
Sat 1/36:10 pmIAD - OPO
2 stops19h 25mSWISS
Deal found 12/16$1,308
This Cheapflightsfares deal was found by Cheapflights users on 12/15. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/244:15 pmOPO - IAD
2 stops26h 45mLufthansa
Sat 1/35:20 pmIAD - OPO
2 stops16h 45mLufthansa
Deal found 12/15$1,372
This SWISS deal was found by Cheapflights users on 12/15. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/317:20 pmOPO - IAD
2 stops23h 40mSWISS
Sun 1/48:30 pmIAD - OPO
1 stop33h 45mSWISS
Deal found 12/15$1,495
This American Airlines deal was found by Cheapflights users on 12/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/318:20 amOPO - BWI
2 stops16h 03mMultiple Airlines
Sun 1/48:35 pmBWI - OPO
1 stop15h 05mMultiple Airlines
Deal found 12/15$1,585
This Delta deal was found by Cheapflights users on 12/15. 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.
Wed 12/2411:25 amOPO - BWI
2 stops17h 06mDelta
Sat 1/36:59 pmBWI - OPO
2 stops15h 26mDelta
Deal found 12/15$1,609

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

Discover tips and strategies to find the most affordable flight options for your journey from Porto (OPO) 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 December 16, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$506
(oojo)

One-way from

$358
(Travelocity)

Popular in

July

Cheapest in

May

Average price

$626
Provider with most accurate pricing for Porto-Washington, D.C. (WAS) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Porto-Washington, D.C. (WAS) flights.
Search Deals
From Porto to Washington, D.C. (WAS)
Search Deals
One-way flight from Porto to Washington, D.C. (WAS)
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($94 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Porto 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 December 16, 2025.
Use the filters below to find and compare flights from Porto to Washington, D.C. that are best for you.

Fly from

Porto

Fly to

Washington, D.C.

Route

Depart

Return

Price

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Fri 1/30

2:20 pm-9:00 pm

1 stop11h 40m

Washington, D.C. Dulles Intl

Fri 2/6

10:30 pm-5:00 pm

1 stop13h 30m

$506

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 1/15

7:00 am-3:15 pm

1 stop13h 15m

Washington, D.C. Dulles Intl

Wed 1/28

10:30 pm-5:00 pm

1 stop13h 30m

$508

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 1/29

7:00 am-3:15 pm

1 stop13h 15m

Washington, D.C. Dulles Intl

Thu 2/5

5:30 pm-9:55 am

1 stop11h 25m

$508

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 1/15

6:00 am-3:46 pm

2 stops38h 46m

Washington, D.C. Dulles Intl

Wed 1/28

9:45 am-11:15 am

2 stops20h 30m

$596

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Thu 3/5

6:00 am-8:55 am

2 stops31h 55m

Washington, D.C. Reagan-National

Mon 3/9

8:10 pm-9:30 am

1 stop9h 20m

$597

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 1/12

11:15 am-4:05 pm

1 stop33h 50m

Washington, D.C. Dulles Intl

Mon 1/19

6:50 pm-10:30 am

1 stop10h 40m

$599

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 1/29

5:00 am-4:05 pm

1 stop16h 05m

Washington, D.C. Dulles Intl

Thu 2/5

12:23 pm-10:25 am

2 stops17h 02m

$600

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 1/15

6:35 am-4:05 pm

1 stop14h 30m

Washington, D.C. Dulles Intl

Wed 1/28

12:23 pm-10:30 am

2 stops17h 07m

$600

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Thu 3/5

6:00 am-7:45 pm

2 stops42h 45m

Washington, D.C. Reagan-National

Mon 3/9

11:05 am-12:50 pm

2 stops21h 45m

$604

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Thu 1/15

6:35 am-7:07 pm

2 stops17h 32m

Baltimore/Washington

Wed 1/28

10:54 am-10:30 am

2 stops18h 36m

$606

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

Showing 1-10 of 56 results
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Compare providers for flights from Porto 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 Porto to Washington, D.C. in December.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star

*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 Porto-Washington, D.C. flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Porto-Washington, D.C. flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Porto-Washington, D.C. flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Porto-Washington, D.C. flights, Cheapflights users trust eDreams the most. eDreams 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 Porto-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 Porto to Washington, D.C.

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

What is the cheapest time of day to fly from OPO to WAS?

Find hourly flight availability from Porto 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 December 16, 2025.

A simple way to save on the total cost of your ticket is to fly from Porto to Washington, D.C. in the afternoon. If you’re flexible enough to do this you can expect to save up to 46% on your trip compared to booking a flight at noon.

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

Related info for your journey

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

    Porto (OPO) is the airport you will fly out of if you book a flight from Porto to Washington, D.C.. You should not have trouble finding flights to Washington, D.C. from Porto; the airport handles an average of 0 outbound flights to Washington, D.C. per day. You should also have plenty of airline options to choose from since 1 airline has flights from the Porto airport to Washington, D.C.. It is only a 6.8 mi journey to Porto (OPO) from Porto’s city center.

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

    Departing from Porto to Washington, D.C. will take you 11h 40m. The distance from Porto to Washington, D.C. is about 3537 mi. This flight may include one or multiple stops.

  • What is the cheapest airline to fly from Porto to Washington, D.C. round-trip?

    According to our current data, TAP AIR PORTUGAL ($492), offers the cheapest pricing from Porto to Washington, D.C.. You may be able to fly from Porto to Washington, D.C. for 25% less than the average price by searching for this airline.

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

    When deciding which route to take from Porto to Washington, D.C. consider Porto - Washington, D.C. Reagan-National, Porto - Baltimore/Washington or Porto - Washington, D.C. Dulles Intl as they are the most popular.

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

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

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

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

    Yes. Cheapflights offers flight deals from Porto 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.

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
Woodbridge
Tysons
Arlington
Owings Mills
Springfield
Hanover
Silver Spring
Fredericksburg
Linthicum Heights
Rockville
Laurel
Towson
Manassas
National Harbor
Bowie
Largo
McLean
Clinton
Cordova

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Alternative routes for Porto to Washington, D.C.

See prices for flight routes from nearby airports that may be better suited for you.
Lisbon to Dulles Intl flights
Lisbon to Reagan-National flights
Porto to Reagan-National flights
Porto to Dulles Intl flights

Top airline flying from Porto to Washington, D.C.

Discover the top airline that operate flights from Porto 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 December 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$492Average$804FlexibilityNo cancel feeOn-timeN/A

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