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Washington, D.C.

$352+ 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 6/16. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — WAS
Jun 14 — Jun 211
Sun 6/14
Sun 6/21
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 May 15, 2026.

This Gotogate deal was found by Cheapflights users on 5/11. 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 10/146:45 pm
OPO
-
IAD
1 stop27h 00m
SWISS
Wed 10/218:20 pm
IAD
-
OPO
1 stop17h 10m
SWISS
Deal found 5/11$643
This Gotogate deal was found by Cheapflights users on 5/13. 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.
Fri 9/257:20 pm
OPO
-
IAD
1 stop26h 25m
SWISS
Wed 9/308:20 pm
IAD
-
OPO
1 stop17h 10m
SWISS
Deal found 5/13$652
This oojo deal was found by Cheapflights users on 5/11. 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.
Mon 5/2510:30 pm
OPO
-
IAD
1 stop21h 40m
TAP AIR PORTUGAL
Sat 1/305:25 pm
IAD
-
OPO
1 stop12h 35m
TAP AIR PORTUGAL
Deal found 5/11$661
This SWISS deal was found by Cheapflights users on 5/10. 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.
Thu 10/17:20 pm
OPO
-
IAD
1 stop26h 25m
SWISS
Thu 11/58:30 pm
IAD
-
OPO
1 stop30h 20m
SWISS
Deal found 5/10$671
This Lufthansa deal was found by Cheapflights users on 5/13. 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.
Fri 8/286:00 am
OPO
-
IAD
1 stop15h 05m
Multiple Airlines
Mon 8/315:25 pm
IAD
-
OPO
1 stop14h 15m
Multiple Airlines
Deal found 5/13$676
This SWISS deal was found by Cheapflights users on 5/10. 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.
Mon 6/17:20 pm
OPO
-
IAD
1 stop25h 10m
SWISS
Sun 6/148:20 pm
IAD
-
OPO
1 stop16h 55m
SWISS
Deal found 5/10$687
This United Airlines deal was found by Cheapflights users on 5/12. 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 6/209:00 am
OPO
-
DCA
1 stop27h 46m
United Airlines
Mon 6/226:00 am
DCA
-
OPO
1 stop20h 00m
United Airlines
Deal found 5/12$688
This Gotogate deal was found by Cheapflights users on 5/12. 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.
Fri 5/296:00 am
OPO
-
IAD
1 stop15h 05m
Lufthansa
Sun 6/1410:20 pm
IAD
-
OPO
1 stop20h 05m
Lufthansa
Deal found 5/12$690
This SWISS deal was found by Cheapflights users on 5/12. 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.
Tue 6/98:40 am
OPO
-
IAD
1 stop13h 05m
SWISS
Tue 6/168:20 pm
IAD
-
OPO
1 stop16h 15m
SWISS
Deal found 5/12$691
This Brussels Airlines deal was found by Cheapflights users on 5/14. 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 Brussels Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/124:50 pm
OPO
-
IAD
1 stop25h 40m
Brussels Airlines
Sun 6/145:35 pm
IAD
-
OPO
1 stop17h 25m
Brussels Airlines
Deal found 5/14$693
This Gotogate deal was found by Cheapflights users on 5/14. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/16:00 am
OPO
-
IAD
1 stop15h 05m
Lufthansa
Sun 6/1410:20 pm
IAD
-
OPO
1 stop20h 05m
Lufthansa
Deal found 5/14$695
This United Airlines deal was found by Cheapflights users on 5/13. 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 11/66:00 am
OPO
-
IAD
1 stop14h 50m
United Airlines
Mon 11/98:15 am
IAD
-
OPO
1 stop20h 15m
United Airlines
Deal found 5/13$696

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 May 15, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$643
(Gotogate)

One-way from

$352
(Kiwi.com)

Popular in

June

Cheapest in

March

Average price

$581
Provider with most accurate pricing for Porto-Washington, D.C. (WAS) flight deals.
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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 ($26 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 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 May 15, 2026.
Use the filters below to find and compare flights from Porto to Washington, D.C. that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 10/1

7:20 pm-4:45 pm

1 stop26h 25m

Washington, D.C. Dulles Intl

Thu 11/5

8:30 pm-7:50 am

1 stop30h 20m

$671

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Fri 11/6

6:00 am-3:50 pm

1 stop14h 50m

Washington, D.C. Dulles Intl

Mon 11/9

8:15 am-9:30 am

1 stop20h 15m

$696

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Thu 10/1

6:00 am-4:57 pm

2 stops15h 57m

Washington, D.C. Reagan-National

Thu 11/5

3:00 pm-9:30 am

1 stop13h 30m

$705

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 10/1

6:00 am-4:05 pm

1 stop15h 05m

Washington, D.C. Dulles Intl

Thu 11/5

12:35 pm-11:40 am

2 stops18h 05m

$705

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Fri 9/25

6:00 am-10:59 pm

2 stops21h 59m

Washington, D.C. Dulles Intl

Wed 9/30

8:30 am-7:00 am

2 stops17h 30m

$706

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Thu 10/22

6:00 am-10:34 pm

2 stops21h 34m

Washington, D.C. Reagan-National

Mon 10/26

6:00 am-6:30 pm

2 stops32h 30m

$707
Quickest round-trip

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Wed 10/14

12:45 pm-10:34 pm

2 stops14h 49m

Washington, D.C. Reagan-National

Wed 10/21

4:20 pm-7:00 am

1 stop9h 40m

$707

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Sat 7/11

11:20 am-10:18 am

1 stop27h 58m

Washington, D.C. Reagan-National

Mon 7/13

10:07 am-6:55 am

1 stop15h 48m

$708

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Wed 10/14

5:00 am-5:30 pm

2 stops17h 30m

Washington, D.C. Reagan-National

Wed 10/21

5:00 pm-3:25 pm

2 stops17h 25m

$715

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 6/1

7:20 pm-2:20 pm

2 stops24h 00m

Washington, D.C. Dulles Intl

Sun 6/14

8:20 pm-6:15 pm

1 stop16h 55m

$715

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/14

Showing 1-10 of 60 resultsSorted by cheapest first
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2
3
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6
  • 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.

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

Currently, March is the cheapest month in which you can book a flight from Porto to Washington, D.C. (average of $422). Flying from Porto to Washington, D.C. in July is currently the most expensive (average of $627). 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.

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

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 May 15, 2026.
See what other customers who have flown with TAP AIR PORTUGAL from Porto to Washington, D.C. have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
TAP AIR PORTUGAL
7.2
Good
2,253 reviews

Crew

7.8

Comfort

7.1

Boarding

7.0

Entertainment

6.3

Food

6.2

Overall

7.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

LIS - EWR

Both flights returning to newirk airport was delayed by over a hour with minimum early notification
TAP AIR PORTUGAL
7.2
Good
2,253 reviews
TAP AIR PORTUGAL
7.2
Good
2,253 reviews

Crew

7.8

Comfort

7.1

Boarding

7.0

Entertainment

6.3

Food

6.2

Overall

7.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

LIS - EWR

Both flights returning to newirk airport was delayed by over a hour with minimum early notification

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 0 airlines have 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 50m. The distance from Porto to Washington, D.C. is about 3537 mi. This flight may include one or multiple stops.

  • 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 $353 on Iberia. Other airlines that offer cheap prices include American Airlines from $358 and TAP AIR PORTUGAL from $420 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.

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

    Currently, March is the cheapest month in which you can book a flight from Porto to Washington, D.C. (average of $422). Flying from Porto to Washington, D.C. in July is currently the most expensive (average of $627). 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
Owings Mills
Springfield
Arlington
Herndon
Rockville
Hyattsville
Manassas
Fredericksburg
Silver Spring
Hanover
Laurel
Woodbridge
Waldorf
Largo
Clinton
Hunt Valley
Cordova
Reston

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