HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Washington, D.C.

$374+ Cheap flights from Porto (OPO) to Washington, D.C. (WAS)

OPO — WAS
Nov 22 — Nov 291
Sun 11/22
Sun 11/29
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Porto to Washington, D.C. with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Porto to Washington, D.C.

Cheapest flights from Porto to Washington, D.C.

Thu 12/311:35 am -
3 stops32h 14m
Thu 12/1011:02 am -
2 stops23h 13m
Deal found 10/19$590
Thu 11/195:00 am -
1 stop15h 15m
Wed 12/210:30 pm -
1 stop18h 30m
Deal found 10/21$613
Thu 12/38:30 am -
1 stop11h 45m
Thu 12/105:25 pm -
1 stop11h 35m
Deal found 10/19$634
Wed 12/237:20 pm -
1 stop26h 40m
Mon 1/48:10 pm -
1 stop34h 05m
Deal found 10/21$646
Wed 12/237:20 pm -
1 stop26h 40m
Sat 1/26:00 pm -
1 stop12h 40m
Deal found 10/21$654
Sun 12/612:05 pm -
1 stop33h 55m
Sun 12/138:10 pm -
1 stop34h 05m
Deal found 10/22$662
Sun 11/152:50 pm -
2 stops52h 50m
Mon 11/305:25 pm -
1 stop11h 50m
Deal found 10/21$677
Wed 12/237:20 pm -
1 stop26h 40m
Sun 1/38:10 pm -
1 stop17h 20m
Deal found 10/21$685
Thu 11/195:00 am -
2 stops17h 59m
Wed 12/211:55 am -
2 stops17h 40m
Deal found 10/20$702
Thu 12/310:15 am -
1 stop17h 09m
Thu 12/101:25 pm -
2 stops16h 10m
Deal found 10/19$713
Sat 12/55:55 am -
2 stops19h 06m
Sat 12/1211:05 am -
2 stops18h 30m
Deal found 10/21$716
Wed 11/1811:15 am -
2 stops17h 26m
Sun 11/229:14 am -
2 stops18h 01m
Deal found 10/22$721

Find flight deals from Porto to Washington, D.C.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$590
(Mytrip)

One-way from

$374
(Kiwi.com)

Popular in

January

Cheapest in

March

Average price

$685
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 ($126 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($28 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2026
Search Deals

Cheapflights Fare Finder

 
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

Sun 2/28

7:35 am-7:05 pm

2 stops16h 30m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$385

PortoWashington, D.C.

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

OPOIAD

Porto

Mon 3/1

12:45 pm-4:20 pm

2 stops32h 35m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$389

PortoWashington, D.C.

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

OPOIAD

Porto

Mon 11/30

5:40 pm-2:45 pm

3 stops50h 05m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$408

PortoWashington, D.C.

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

OPOIAD

Porto

Wed 10/28

6:55 pm-3:45 pm

3 stops48h 50m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$427

PortoWashington, D.C.

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

OPOIAD

Porto

Mon 3/1

8:20 am-4:20 pm

1 stop13h 00m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$434

PortoWashington, D.C.

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

OPOIAD

Porto

Wed 11/18

8:40 pm-8:30 pm

3 stops52h 50m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$444

PortoWashington, D.C.

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

OPOIAD

Porto

Sun 2/28

8:40 pm-4:20 pm

1 stop24h 40m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$445

PortoWashington, D.C.

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

OPOIAD

Porto

Sun 11/8

8:10 am-2:40 pm

2 stops59h 30m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$451

PortoWashington, D.C.

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

OPOIAD

Porto

Tue 12/29

7:55 am-7:20 pm

2 stops16h 25m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$496

PortoWashington, D.C.

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

OPODCA

Porto

Wed 11/18

11:35 am-10:26 pm

2 stops15h 51m

Washington, D.C. Reagan-National

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$514

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/20

Showing 1-10 of 37 resultsSorted by cheapest first
1
2
3
4
  • 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

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 $624 and $768 in December.
The cheapest round-trip price found within the last 5 days was $590 on Multiple Airlines (Dec 3-Dec 10).

Related info for your journey

  • 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 11h 45m. 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 - Baltimore/Washington, Porto - Washington, D.C. Reagan-National or Porto - Washington, D.C. Dulles Intl 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
Woodbridge
Arlington
Owings Mills
Lanham
Reston
Herndon
Hyattsville
Rockville
Springfield
Fredericksburg
Falls Church
Tysons
Towson
Oxon Hill
Laurel
Clinton
Hunt Valley
Waldorf
Silver Spring

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Porto to Washington, D.C.

Lisbon to Dulles Intl flights

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.