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Washington, D.C.

$339+ 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 12/18. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — WAS
nov. 29 — dic. 61
sáb. 11/29
sáb. 12/6
1 adult, Economy
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Find 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 octubre 30, 2025.

This Rumbo deal was found by Cheapflights users on 10/29. 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 Rumbo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 11/215:35 pmOPO - IAD
1 stop30h 15mScandinavian Airlines
jue. 12/48:30 pmIAD - OPO
1 stop15h 25mScandinavian Airlines
Deal found 10/29$519
This KLM deal was found by Cheapflights users on 10/29. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/246:30 amOPO - IAD
1 stop14h 35mKLM
lun. 12/16:50 pmIAD - OPO
1 stop10h 40mKLM
Deal found 10/29$572
This Delta deal was found by Cheapflights users on 10/29. 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.
lun. 11/246:30 amOPO - IAD
1 stop14h 35mDelta
lun. 12/16:50 pmIAD - OPO
1 stop10h 40mDelta
Deal found 10/29$573
This Delta deal was found by Cheapflights users on 10/30. 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.
vie. 11/216:30 amOPO - DCA
2 stops21h 26mDelta
jue. 12/411:13 amDCA - OPO
2 stops18h 12mDelta
Deal found 10/30$577
This Delta deal was found by Cheapflights users on 10/29. 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.
lun. 11/246:30 amOPO - DCA
2 stops21h 26mDelta
lun. 12/111:10 amDCA - OPO
2 stops18h 20mDelta
Deal found 10/29$578
This Delta deal was found by Cheapflights users on 10/29. 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.
sáb. 11/226:00 amOPO - IAD
2 stops18h 08mDelta
dom. 4/56:30 pmIAD - OPO
1 stop16h 00mDelta
Deal found 10/29$578
This Delta deal was found by Cheapflights users on 10/30. 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.
vie. 11/216:30 amOPO - IAD
1 stop14h 35mDelta
jue. 12/412:19 pmIAD - OPO
2 stops17h 11mDelta
Deal found 10/30$581
This Air France deal was found by Cheapflights users on 10/29. 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 France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/246:30 amOPO - DCA
2 stops15h 30mMultiple Airlines
lun. 12/12:59 pmDCA - OPO
2 stops14h 31mMultiple Airlines
Deal found 10/29$587
This Air Canada deal was found by Cheapflights users on 10/29. 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.
sáb. 11/226:00 amOPO - IAD
2 stops43h 26mAir Canada
dom. 4/59:55 amIAD - OPO
2 stops27h 35mAir Canada
Deal found 10/29$591
This Kiwi.com deal was found by Cheapflights users on 10/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/188:40 amOPO - IAD
1 stop13h 00mSWISS
mar. 12/308:30 pmIAD - OPO
1 stop30h 20mSWISS
Deal found 10/30$592
This United Airlines deal was found by Cheapflights users on 10/29. 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.
lun. 11/246:00 amOPO - DCA
2 stops21h 42mUnited Airlines
dom. 11/306:05 pmDCA - OPO
1 stop10h 25mUnited Airlines
Deal found 10/29$614
This United Airlines deal was found by Cheapflights users on 10/28. 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.
vie. 11/712:35 pmOPO - DCA
1 stop13h 59mUnited Airlines
dom. 11/236:05 pmDCA - OPO
1 stop10h 25mUnited Airlines
Deal found 10/28$615

Cheap 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 octubre 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$519
(Rumbo)

One-way from

$339
(Cheapflightsfares)

Popular in

January

Cheapest in

May

Average price

$684
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. 14% potential increase in price ($118 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($35 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 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 octubre 30, 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

vie. 11/21

5:35 pm-6:50 pm

1 stop30h 15m

Washington, D.C. Dulles Intl

jue. 12/4

8:30 pm-4:55 pm

1 stop15h 25m

$519

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

sáb. 11/22

6:00 am-4:05 pm

1 stop15h 05m

Washington, D.C. Dulles Intl

dom. 4/5

9:20 pm-3:30 pm

1 stop13h 10m

$572

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

lun. 11/24

6:30 am-4:05 pm

1 stop14h 35m

Washington, D.C. Dulles Intl

lun. 12/1

6:50 pm-10:30 am

1 stop10h 40m

$572

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

lun. 11/24

6:30 am-4:05 pm

1 stop14h 35m

Washington, D.C. Dulles Intl

lun. 12/1

6:50 pm-10:30 am

1 stop10h 40m

$573

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

vie. 11/21

6:30 am-10:56 pm

2 stops21h 26m

Washington, D.C. Reagan-National

jue. 12/4

11:13 am-10:25 am

2 stops18h 12m

$577

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

lun. 11/24

6:30 am-10:56 pm

2 stops21h 26m

Washington, D.C. Reagan-National

lun. 12/1

11:10 am-10:30 am

2 stops18h 20m

$578

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

sáb. 11/22

6:00 am-7:08 pm

2 stops18h 08m

Washington, D.C. Dulles Intl

dom. 4/5

6:30 pm-3:30 pm

1 stop16h 00m

$578

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

vie. 11/21

6:30 am-4:05 pm

1 stop14h 35m

Washington, D.C. Dulles Intl

jue. 12/4

12:19 pm-10:30 am

2 stops17h 11m

$582

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

lun. 11/24

6:30 am-5:00 pm

2 stops15h 30m

Washington, D.C. Reagan-National

lun. 12/1

2:59 pm-10:30 am

2 stops14h 31m

$587

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

sáb. 11/22

6:00 am-8:26 pm

2 stops43h 26m

Washington, D.C. Dulles Intl

dom. 4/5

9:55 am-6:30 pm

2 stops27h 35m

$591

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 59 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 October.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice 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 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 octubre 30, 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 14h 35m. 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 ($480), offers the cheapest pricing from Porto to Washington, D.C.. You may be able to fly from Porto to Washington, D.C. for 31% less than the average price by searching for this airline.

  • What are the cheapest airlines to fly from Porto to Washington, D.C. one-way?

    One-way options have recently been found by users for as low as $339 on Iberia. Other airlines that offer cheap prices include American Airlines from $353 and British Airways from $379 one-way.

  • 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. Dulles Intl, Porto - Baltimore/Washington or Porto - Washington, D.C. Reagan-National 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
Springfield
Hanover
Silver Spring
Fairfax
Fredericksburg
Falls Church
Owings Mills
Linthicum Heights
Manassas
Largo
Oxon Hill
Laurel
Towson
National Harbor
Waldorf
Bowie

Browse thousands of different options on Cheapflights for your next trip

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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 Dulles Intl flights
Porto to Reagan-National 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 octubre 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$480Average$841FlexibilityNo cancel feeOn-timeN/A

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