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Washington, D.C.

$337+ 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 4/12. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — WAS
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
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 January 29, 2026.

This Kiwi.com deal was found by Cheapflights users on 1/27. 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.
Thu 2/126:00 am
OPO
-
IAD
1 stop13h 35m
Lufthansa
Wed 2/2510:00 pm
IAD
-
OPO
1 stop12h 25m
Lufthansa
Deal found 1/27$440
This Kiwi.com deal was found by Cheapflights users on 1/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/276:00 am
OPO
-
IAD
1 stop13h 35m
Lufthansa
Sun 3/157:00 pm
IAD
-
OPO
1 stop12h 40m
Lufthansa
Deal found 1/28$444
This Kiwi.com deal was found by Cheapflights users on 1/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/146:00 am
OPO
-
IAD
1 stop19h 15m
Lufthansa
Sat 2/285:15 pm
IAD
-
OPO
1 stop13h 25m
Lufthansa
Deal found 1/29$445
This oojo deal was found by Cheapflights users on 1/28. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/215:05 am
OPO
-
IAD
1 stop15h 00m
TAP AIR PORTUGAL
Wed 4/2910:35 pm
IAD
-
OPO
1 stop16h 50m
TAP AIR PORTUGAL
Deal found 1/28$446
This Kiwi.com deal was found by Cheapflights users on 1/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/66:00 am
OPO
-
IAD
1 stop14h 50m
Lufthansa
Tue 5/265:55 pm
IAD
-
OPO
1 stop16h 45m
Lufthansa
Deal found 1/28$448
This Kiwi.com deal was found by Cheapflights users on 1/27. 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.
Thu 2/126:00 am
OPO
-
IAD
1 stop14h 50m
Multiple Airlines
Mon 2/165:45 pm
IAD
-
OPO
1 stop12h 30m
Multiple Airlines
Deal found 1/27$449
This United Airlines deal was found by Cheapflights users on 1/27. 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 2/126:00 am
OPO
-
IAD
1 stop14h 50m
United Airlines
Wed 2/255:34 pm
IAD
-
OPO
1 stop10h 56m
United Airlines
Deal found 1/27$458
This Expedia deal was found by Cheapflights users on 1/28. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/256:00 am
OPO
-
IAD
1 stop14h 50m
Multiple Airlines
Wed 3/45:45 pm
IAD
-
OPO
1 stop12h 30m
Multiple Airlines
Deal found 1/28$459
This United Airlines deal was found by Cheapflights users on 1/28. 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.
Sat 2/146:00 am
OPO
-
IAD
1 stop19h 15m
United Airlines
Sat 2/288:36 am
IAD
-
OPO
1 stop19h 54m
United Airlines
Deal found 1/28$460
This Lufthansa deal was found by Cheapflights users on 1/27. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/126:00 am
OPO
-
IAD
1 stop13h 35m
Lufthansa
Mon 2/165:27 pm
IAD
-
OPO
2 stops14h 23m
Lufthansa
Deal found 1/27$462
This United Airlines deal was found by Cheapflights users on 1/26. 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 4/166:00 am
OPO
-
IAD
1 stop15h 05m
United Airlines
Sun 4/195:55 pm
IAD
-
OPO
1 stop12h 15m
United Airlines
Deal found 1/26$463
This United Airlines deal was found by Cheapflights users on 1/26. 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 4/156:00 am
OPO
-
DCA
2 stops21h 43m
United Airlines
Sun 4/194:30 pm
DCA
-
OPO
1 stop12h 15m
United Airlines
Deal found 1/26$467

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 January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$440
(Kiwi.com)

One-way from

$337
(Kiwi.com)

Popular in

August

Cheapest in

June

Average price

$580
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. 3% potential increase in price ($22 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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 January 29, 2026.
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

Thu 2/12

6:00 am-2:35 pm

1 stop13h 35m

Washington, D.C. Dulles Intl

Wed 2/25

6:00 pm-11:40 am

1 stop12h 40m

$440

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Tue 4/21

9:00 am-3:05 pm

1 stop11h 05m

Washington, D.C. Dulles Intl

Wed 4/29

10:35 pm-7:00 pm

1 stop15h 25m

$445

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Sat 2/14

6:00 am-8:15 pm

1 stop19h 15m

Washington, D.C. Dulles Intl

Sat 2/28

5:15 pm-11:40 am

1 stop13h 25m

$445

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Fri 3/6

6:00 am-3:50 pm

1 stop14h 50m

Washington, D.C. Dulles Intl

Tue 5/26

5:55 pm-3:40 pm

1 stop16h 45m

$448

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Sat 2/14

6:00 am-8:15 pm

1 stop19h 15m

Washington, D.C. Dulles Intl

Sat 2/28

8:36 am-9:30 am

1 stop19h 54m

$460

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 2/12

6:00 am-2:35 pm

1 stop13h 35m

Washington, D.C. Dulles Intl

Mon 2/16

5:27 pm-12:50 pm

2 stops14h 23m

$462

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 4/16

6:00 am-4:05 pm

1 stop15h 05m

Washington, D.C. Dulles Intl

Sun 4/19

5:55 pm-11:10 am

1 stop12h 15m

$463

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 2/16

5:00 am-4:05 pm

1 stop16h 05m

Washington, D.C. Dulles Intl

Sun 3/1

6:50 pm-10:30 am

1 stop10h 40m

$464

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Fri 3/6

6:00 am-8:26 pm

2 stops43h 26m

Washington, D.C. Dulles Intl

Tue 5/26

8:20 pm-7:55 am

1 stop30h 35m

$467

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Wed 4/15

6:00 am-10:43 pm

2 stops21h 43m

Washington, D.C. Reagan-National

Sun 4/19

4:30 pm-9:45 am

1 stop12h 15m

$467

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

Showing 1-10 of 50 results
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  • Most accurate provider: When it comes to deals on Porto-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 Porto-Washington, D.C. flight deals on Cheapflights vs. FlightHub >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 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 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.
No data available for this route at this time. Please check back soon.

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 05m. 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 21% 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. Dulles Intl, Porto - Washington, D.C. Reagan-National or Porto - Baltimore/Washington 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
Silver Spring
Herndon
Fredericksburg
Hanover
Linthicum Heights
Rockville
Laurel
Towson
Manassas
Largo
Bowie
McLean
Clinton
Upper Marlboro

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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 January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$492Average$751FlexibilityNo cancel feeOn-timeN/A

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