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Washington, D.C.

$329+ 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 11/2. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — WAS
Sep 13 — Sep 201
Sun 9/13
Sun 9/20
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 August 14, 2026.

This Gotogate deal was found by Cheapflights users on 8/12. 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.
Thu 10/19:00 am -
1 stop11h 10m
Wed 10/145:45 pm -
1 stop11h 25m
Deal found 8/12$581
This Rumbo deal was found by Cheapflights users on 8/10. 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 Rumbo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/18:30 am -
1 stop11h 15m
Mon 12/75:25 pm -
1 stop11h 35m
Deal found 8/10$589
This Expedia deal was found by Cheapflights users on 8/9. 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.
Fri 10/97:00 am -
1 stop12h 25m
Sun 10/115:40 pm -
1 stop21h 55m
Deal found 8/9$590
This Mytrip deal was found by Cheapflights users on 8/13. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/177:00 am -
1 stop13h 10m
Wed 9/3010:35 pm -
1 stop16h 50m
Deal found 8/13$592
This Delta deal was found by Cheapflights users on 8/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/285:00 am -
1 stop15h 35m
Mon 8/317:19 pm -
2 stops15h 06m
Deal found 8/14$603
This Delta deal was found by Cheapflights users on 8/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/85:00 am -
1 stop15h 35m
Wed 9/169:45 pm -
1 stop12h 40m
Deal found 8/12$604
This Delta deal was found by Cheapflights users on 8/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/175:00 am -
1 stop15h 35m
Wed 9/306:26 pm -
2 stops15h 59m
Deal found 8/10$605
This Delta deal was found by Cheapflights users on 8/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/285:00 am -
2 stops16h 59m
Mon 8/315:00 pm -
2 stops17h 25m
Deal found 8/14$608
This Delta deal was found by Cheapflights users on 8/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/85:00 am -
2 stops17h 27m
Wed 9/166:19 pm -
2 stops16h 06m
Deal found 8/12$609
This Delta deal was found by Cheapflights users on 8/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/275:00 am -
2 stops18h 33m
Thu 9/109:45 pm -
1 stop12h 40m
Deal found 8/12$609
This American Airlines deal was found by Cheapflights users on 8/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/158:20 am -
1 stop15h 40m
Sun 10/185:01 am -
2 stops21h 39m
Deal found 8/12$612
This Delta deal was found by Cheapflights users on 8/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/85:00 am -
2 stops17h 48m
Tue 9/155:35 pm -
2 stops16h 50m
Deal found 8/11$613

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 August 14, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$581
(Gotogate)

One-way from

$329
(Kiwi.com)

Popular in

January

Cheapest in

March

Average price

$772
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. 11% potential increase in price ($102 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($26 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 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 August 14, 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 Porto - IAD Washington, D.C. Dulles Intl

OPOIAD

Porto

Thu 9/17

7:00 am-3:10 pm

1 stop13h 10m

Washington, D.C. Dulles Intl

Wed 9/30

10:35 pm-8:25 pm

1 stop16h 50m

$592

PortoWashington, D.C.

OPO Porto - IAD Washington, D.C. Dulles Intl

OPOIAD

Porto

Thu 9/17

5:00 am-3:35 pm

1 stop15h 35m

Washington, D.C. Dulles Intl

Wed 9/30

6:26 pm-3:25 pm

2 stops15h 59m

$603

PortoWashington, D.C.

OPO Porto - IAD Washington, D.C. Dulles Intl

OPOIAD

Porto

Thu 9/10

5:00 am-3:35 pm

1 stop15h 35m

Washington, D.C. Dulles Intl

Thu 9/17

9:45 pm-10:00 pm

1 stop19h 15m

$603

PortoWashington, D.C.

OPO Porto - IAD Washington, D.C. Dulles Intl

OPOIAD

Porto

Wed 9/9

5:00 am-3:35 pm

1 stop15h 35m

Washington, D.C. Dulles Intl

Wed 9/16

9:45 pm-3:25 pm

1 stop12h 40m

$604

PortoBaltimore

OPO Porto - BWI Baltimore/Washington

OPOBWI

Porto

Tue 9/8

5:00 am-5:27 pm

2 stops17h 27m

Baltimore/Washington

Wed 9/16

6:19 pm-3:25 pm

2 stops16h 06m

$609

PortoBaltimore

OPO Porto - BWI Baltimore/Washington

OPOBWI

Porto

Wed 9/9

5:00 am-5:27 pm

2 stops17h 27m

Baltimore/Washington

Wed 9/16

6:19 pm-3:25 pm

2 stops16h 06m

$609

PortoWashington, D.C.

OPO Porto - IAD Washington, D.C. Dulles Intl

OPOIAD

Porto

Thu 9/3

5:55 am-4:05 pm

1 stop15h 10m

Washington, D.C. Dulles Intl

Tue 9/8

6:15 pm-3:25 pm

1 stop16h 10m

$609

PortoWashington, D.C.

OPO Porto - IAD Washington, D.C. Dulles Intl

OPOIAD

Porto

Thu 8/27

5:00 am-6:33 pm

2 stops18h 33m

Washington, D.C. Dulles Intl

Thu 9/10

9:45 pm-3:25 pm

1 stop12h 40m

$609

PortoWashington, D.C.

OPO Porto - IAD Washington, D.C. Dulles Intl

OPOIAD

Porto

Wed 9/9

5:00 am-5:46 pm

2 stops17h 46m

Washington, D.C. Dulles Intl

Wed 9/16

9:45 pm-3:25 pm

1 stop12h 40m

$609

PortoWashington, D.C.

OPO Porto - DCA Washington, D.C. Reagan-National

OPODCA

Porto

Tue 9/8

5:00 am-5:48 pm

2 stops17h 48m

Washington, D.C. Reagan-National

Tue 9/15

5:35 pm-3:25 pm

2 stops16h 50m

$613

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

Showing 1-10 of 60 resultsSorted by cheapest first
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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 $554). Flying from Porto to Washington, D.C. in January is currently the most expensive (average of $1,077). 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.?

Airfare is below average for this route at the moment.
Porto to Washington, D.C. flights typically cost between $761 and $809 in October.
The cheapest round-trip price found within the last 5 days was $581 on TAP AIR PORTUGAL (Oct 1-Oct 14).

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 August 14, 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
2,368 reviews

Crew

7.8

Boarding

7.0

Overall

7.2

Comfort

7.1

Food

6.3

Entertainment

6.4

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
2,368 reviews
TAP AIR PORTUGAL
7.2
Good
2,368 reviews

Crew

7.8

Boarding

7.0

Overall

7.2

Comfort

7.1

Food

6.3

Entertainment

6.4

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 13h 10m. 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 $334 on Iberia. Other airlines that offer cheap prices include American Airlines from $360 and TAP AIR PORTUGAL from $471 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 $554). Flying from Porto to Washington, D.C. in January is currently the most expensive (average of $1,077). 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
Owings Mills
Arlington
Tysons
Springfield
Lanham
Reston
Herndon
Rockville
Hyattsville
Fredericksburg
Falls Church
Hanover
Laurel
Oxon Hill
Clinton
Hunt Valley
Woodbridge
Silver Spring
Largo

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