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Washington, D.C.

$365+ 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 5/19. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — WAS
Apr 30 — May 71
Thu 4/30
Thu 5/7
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 March 31, 2026.

This Gotogate deal was found by Cheapflights users on 3/29. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/1310:30 pm
OPO
-
IAD
1 stop21h 40m
TAP AIR PORTUGAL
Sun 4/265:40 pm
IAD
-
OPO
1 stop11h 20m
TAP AIR PORTUGAL
Deal found 3/29$565
This Mytrip deal was found by Cheapflights users on 3/30. 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.
Wed 4/152:40 pm
OPO
-
IAD
2 stops29h 30m
Multiple Airlines
Sun 4/1910:35 pm
IAD
-
OPO
2 stops20h 15m
Multiple Airlines
Deal found 3/30$588
This oojo deal was found by Cheapflights users on 3/31. 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 4/2110:30 pm
OPO
-
IAD
1 stop27h 05m
TAP AIR PORTUGAL
Wed 4/2910:35 pm
IAD
-
OPO
1 stop21h 05m
TAP AIR PORTUGAL
Deal found 3/31$618
This Rumbo deal was found by Cheapflights users on 3/31. 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.
Thu 4/210:00 am
OPO
-
IAD
1 stop15h 35m
TAP AIR PORTUGAL
Sat 4/1810:35 pm
IAD
-
OPO
1 stop11h 25m
TAP AIR PORTUGAL
Deal found 3/31$628
This SWISS deal was found by Cheapflights users on 3/30. 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.
Wed 4/158:40 am
OPO
-
IAD
1 stop13h 05m
SWISS
Sun 4/198:20 pm
IAD
-
OPO
1 stop34h 05m
SWISS
Deal found 3/30$657
This Booking.com deal was found by Cheapflights users on 3/27. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/147:20 pm
OPO
-
IAD
1 stop26h 25m
SWISS
Wed 5/278:20 pm
IAD
-
OPO
1 stop17h 10m
SWISS
Deal found 3/27$661
This Air France deal was found by Cheapflights users on 3/28. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/164:20 pm
OPO
-
IAD
1 stop28h 15m
Multiple Airlines
Sat 5/29:45 pm
IAD
-
OPO
1 stop12h 40m
Multiple Airlines
Deal found 3/28$672
This Delta deal was found by Cheapflights users on 3/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/235:00 am
OPO
-
IAD
1 stop15h 35m
Delta
Wed 5/69:45 pm
IAD
-
OPO
1 stop12h 40m
Delta
Deal found 3/27$674
This SWISS deal was found by Cheapflights users on 3/30. 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 4/272:35 pm
OPO
-
IAD
1 stop28h 40m
SWISS
Mon 5/48:20 pm
IAD
-
OPO
1 stop34h 05m
SWISS
Deal found 3/30$677
This Delta deal was found by Cheapflights users on 3/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/1311:25 am
OPO
-
DCA
2 stops17h 15m
Delta
Sun 4/265:00 pm
DCA
-
OPO
2 stops17h 25m
Delta
Deal found 3/29$678
This Delta deal was found by Cheapflights users on 3/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/145:00 am
OPO
-
BWI
2 stops19h 16m
Delta
Wed 5/273:53 pm
BWI
-
OPO
2 stops18h 32m
Delta
Deal found 3/27$679
This Air France deal was found by Cheapflights users on 3/28. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/165:55 am
OPO
-
BWI
2 stops15h 54m
Air France
Sat 5/25:20 pm
BWI
-
OPO
2 stops17h 05m
Air France
Deal found 3/28$684

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 March 31, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$565
(Gotogate)

One-way from

$365
(Kiwi.com)

Popular in

August

Cheapest in

May

Average price

$661
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. 1% potential increase in price ($10 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 March 31, 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

Mon 4/13

10:30 pm-3:10 pm

1 stop21h 40m

Washington, D.C. Dulles Intl

Sun 4/26

10:35 pm-7:00 pm

1 stop15h 25m

$572

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Sun 4/26

5:00 am-3:35 pm

1 stop15h 35m

Washington, D.C. Dulles Intl

Sun 5/3

9:45 pm-10:00 pm

1 stop19h 15m

$674

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 4/23

5:00 am-3:35 pm

1 stop15h 35m

Washington, D.C. Dulles Intl

Wed 5/6

9:45 pm-3:25 pm

1 stop12h 40m

$674

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 4/27

2:35 pm-2:15 pm

1 stop28h 40m

Washington, D.C. Dulles Intl

Mon 5/4

8:20 pm-11:25 am

1 stop34h 05m

$677

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Mon 4/13

11:25 am-11:40 pm

2 stops17h 15m

Washington, D.C. Reagan-National

Sun 4/26

5:00 pm-3:25 pm

2 stops17h 25m

$678

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 4/16

5:00 am-6:08 pm

2 stops18h 08m

Washington, D.C. Dulles Intl

Sat 5/2

9:45 pm-10:00 pm

1 stop19h 15m

$678

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 4/23

12:15 pm-4:45 pm

1 stop33h 30m

Washington, D.C. Dulles Intl

Wed 5/6

8:20 pm-11:25 am

1 stop34h 05m

$685

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Thu 4/23

5:00 am-10:59 pm

2 stops22h 59m

Baltimore/Washington

Wed 5/6

3:33 pm-3:25 pm

2 stops18h 52m

$687

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 4/13

6:30 am-11:03 pm

2 stops21h 33m

Washington, D.C. Dulles Intl

Sun 4/26

6:15 pm-3:25 pm

1 stop16h 10m

$687

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 4/27

5:00 am-3:35 pm

1 stop15h 35m

Washington, D.C. Dulles Intl

Mon 5/4

6:50 pm-3:25 pm

2 stops15h 35m

$695

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/28

Showing 1-10 of 55 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.

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 March 31, 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
7.1
Good
2,185 reviews

Crew

7.8

Overall

7.1

Comfort

7.1

Food

6.2

Boarding

7.0

Entertainment

6.3

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
7.1
Good
2,185 reviews
TAP AIR PORTUGAL
7.1
Good
2,185 reviews

Crew

7.8

Overall

7.1

Comfort

7.1

Food

6.2

Boarding

7.0

Entertainment

6.3

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 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 17h 15m. The distance from Porto to Washington, D.C. is about 3520 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 23% less than the average price by searching for this airline.

  • 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 - 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.

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
Owings Mills
Arlington
Springfield
Silver Spring
Herndon
Hyattsville
Hanover
Laurel
Rockville
Upper Marlboro
Fredericksburg
Largo
Bowie
Clinton
Towson
College Park
Cordova

Browse thousands of different options on Cheapflights for your next trip

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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

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 March 31, 2026.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$492Average$751FlexibilityNo cancel feeOn-timeN/A

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