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Washington, D.C.

$343+ 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 9/2. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — WAS
Jul 25 — Aug 11
Sat 7/25
Sat 8/1
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 June 25, 2026.

This American Airlines deal was found by Cheapflights users on 6/24. 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.
Mon 9/218:20 am
OPO
-
BWI
2 stops30h 47m
American Airlines
Tue 9/297:25 pm
BWI
-
OPO
2 stops31h 15m
American Airlines
Deal found 6/24$622
This American Airlines deal was found by Cheapflights users on 6/24. 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.
Mon 9/218:20 am
OPO
-
BWI
2 stops33h 45m
American Airlines
Thu 10/12:08 pm
BWI
-
OPO
2 stops20h 52m
American Airlines
Deal found 6/24$624
This American Airlines deal was found by Cheapflights users on 6/20. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/38:20 am
OPO
-
BWI
2 stops37h 26m
American Airlines
Sat 12/55:47 pm
BWI
-
OPO
2 stops36h 58m
American Airlines
Deal found 6/20$625
This Delta deal was found by Cheapflights users on 6/24. 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 9/225:00 am
OPO
-
BWI
2 stops17h 27m
Delta
Mon 9/281:55 pm
BWI
-
OPO
2 stops20h 30m
Delta
Deal found 6/24$627
This American Airlines deal was found by Cheapflights users on 6/24. 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.
Thu 9/2412:25 pm
OPO
-
BWI
2 stops35h 05m
American Airlines
Tue 9/297:25 pm
BWI
-
OPO
2 stops31h 15m
American Airlines
Deal found 6/24$629
This American Airlines deal was found by Cheapflights users on 6/24. 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.
Thu 9/2412:25 pm
OPO
-
BWI
2 stops35h 05m
American Airlines
Thu 10/12:08 pm
BWI
-
OPO
2 stops20h 52m
American Airlines
Deal found 6/24$631
This Iberia deal was found by Cheapflights users on 6/24. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2210:00 pm
OPO
-
BWI
2 stops24h 15m
Iberia
Mon 9/289:30 pm
BWI
-
OPO
2 stops17h 30m
Iberia
Deal found 6/24$632
This American Airlines deal was found by Cheapflights users on 6/24. 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.
Tue 9/2212:25 pm
OPO
-
BWI
2 stops53h 40m
American Airlines
Tue 9/297:25 pm
BWI
-
OPO
2 stops31h 15m
American Airlines
Deal found 6/24$633
This Mytrip deal was found by Cheapflights users on 6/21. 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 Mytrip 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
Lufthansa
Sat 12/1210:55 pm
IAD
-
OPO
1 stop20h 00m
Lufthansa
Deal found 6/21$633
This oojo deal was found by Cheapflights users on 6/21. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2811:40 am
OPO
-
IAD
1 stop13h 55m
TAP AIR PORTUGAL
Wed 12/910:30 pm
IAD
-
OPO
1 stop11h 30m
TAP AIR PORTUGAL
Deal found 6/21$634
This American Airlines deal was found by Cheapflights users on 6/24. 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.
Tue 9/2212:25 pm
OPO
-
BWI
2 stops53h 40m
American Airlines
Sun 9/276:00 am
BWI
-
OPO
2 stops24h 45m
American Airlines
Deal found 6/24$635
This American Airlines deal was found by Cheapflights users on 6/24. 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.
Thu 9/2412:25 pm
OPO
-
BWI
2 stops35h 05m
American Airlines
Sat 9/267:09 pm
BWI
-
OPO
2 stops55h 31m
American Airlines
Deal found 6/24$637

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 June 25, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$622
(American Airlines)

One-way from

$343
(Iberia)

Popular in

January

Cheapest in

March

Average price

$830
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 ($106 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($34 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 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 June 25, 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

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Thu 12/3

8:20 am-4:46 pm

2 stops37h 26m

Baltimore/Washington

Sat 12/5

5:47 pm-11:45 am

2 stops36h 58m

$624

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Tue 9/22

5:00 am-5:27 pm

2 stops17h 27m

Baltimore/Washington

Sun 9/27

6:20 pm-3:30 pm

2 stops16h 10m

$624

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Tue 9/22

6:00 am-4:05 pm

1 stop15h 05m

Washington, D.C. Dulles Intl

Mon 9/28

3:25 pm-11:15 am

1 stop14h 50m

$645

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Fri 8/28

6:00 am-4:05 pm

1 stop15h 05m

Washington, D.C. Dulles Intl

Tue 12/15

8:15 am-9:30 am

1 stop20h 15m

$688

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Fri 8/28

5:00 am-5:47 pm

2 stops17h 47m

Baltimore/Washington

Wed 12/9

1:00 pm-10:35 am

2 stops16h 35m

$699

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Sun 9/20

9:00 am-10:39 am

2 stops30h 39m

Baltimore/Washington

Tue 9/29

6:05 am-9:45 am

2 stops22h 40m

$708

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Sun 9/20

9:00 am-10:39 am

2 stops30h 39m

Baltimore/Washington

Wed 9/30

9:09 am-9:45 am

2 stops19h 36m

$708

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Wed 7/29

8:20 am-3:30 pm

1 stop12h 10m

Washington, D.C. Dulles Intl

Wed 9/9

5:00 pm-11:45 am

1 stop13h 45m

$710

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Sun 8/30

6:00 am-4:05 pm

1 stop15h 05m

Washington, D.C. Dulles Intl

Tue 12/15

5:20 pm-9:30 am

1 stop11h 10m

$711

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Fri 8/28

6:00 am-4:05 pm

1 stop15h 05m

Washington, D.C. Dulles Intl

Wed 12/16

5:15 pm-3:20 pm

1 stop17h 05m

$712

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/23

Showing 1-10 of 60 resultsSorted by cheapest first
1
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 $630). 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 June 25, 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
2,299 reviews

Entertainment

6.3

Overall

7.2

Crew

7.8

Food

6.2

Comfort

7.1

Boarding

7.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jun 2026

LIS - ORD

The check in process at the Lisbon Airport was terrible. The TAP staff was incompetent and directed us incorrectly.
TAP AIR PORTUGAL
7.2
Good
2,299 reviews
TAP AIR PORTUGAL
7.2
Good
2,299 reviews

Entertainment

6.3

Overall

7.2

Crew

7.8

Food

6.2

Comfort

7.1

Boarding

7.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jun 2026

LIS - ORD

The check in process at the Lisbon Airport was terrible. The TAP staff was incompetent and directed us incorrectly.

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 15h 05m. 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 $360 and TAP AIR PORTUGAL from $513 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 $630). 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
Arlington
Tysons
Owings Mills
Springfield
Lanham
Reston
Herndon
Rockville
Hyattsville
Falls Church
Laurel
Fredericksburg
Hanover
Manassas
Waldorf
Silver Spring
Largo
Clinton
Hunt Valley

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Alternative routes for Porto to Washington, D.C.

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