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Washington, D.C.

$337+ 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 10/14. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — WAS
ago. 4 — ago. 111
lun. 8/4
lun. 8/11
1 adult, Economy
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Cheap 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 julio 30, 2025.

Round-trip from

$437
(Mytrip)

One-way from

$337
(Mytrip)

Popular in

September

Cheapest in

May

Average price

$771
From Porto to Washington, D.C. (WAS)
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One-way flight from Porto to Washington, D.C. (WAS)
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Highest demand for flights based on searches. 4% potential increase in price ($29 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find 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 julio 30, 2025.

This Mytrip deal was found by Cheapflights users on 7/30. 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.
jue. 9/49:20 pmOPO - BWI
1 stop25h 20mPLAY
sáb. 9/206:50 pmBWI - OPO
1 stop20h 15mPLAY
Deal found 7/30$437
This lol.travel deal was found by Cheapflights users on 7/29. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/189:15 pmOPO - IAD
1 stop23h 05mTAP AIR PORTUGAL
mié. 10/110:20 pmIAD - OPO
1 stop13h 45mTAP AIR PORTUGAL
Deal found 7/29$482
This Delta deal was found by Cheapflights users on 7/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/86:15 amOPO - IAD
1 stop14h 20mDelta
mar. 10/217:59 pmIAD - OPO
2 stops14h 31mDelta
Deal found 7/30$553
This Delta deal was found by Cheapflights users on 7/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/46:30 amOPO - DCA
2 stops16h 44mDelta
sáb. 9/205:15 pmDCA - OPO
2 stops17h 15mDelta
Deal found 7/30$559
This KLM deal was found by Cheapflights users on 7/29. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/188:20 pmOPO - IAD
1 stop24h 15mMultiple Airlines
mié. 10/19:20 pmIAD - OPO
1 stop30h 05mMultiple Airlines
Deal found 7/29$560
This American Airlines deal was found by Cheapflights users on 7/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/188:15 amOPO - IAD
1 stop11h 45mAmerican Airlines
mié. 10/14:35 pmIAD - OPO
1 stop10h 00mAmerican Airlines
Deal found 7/29$564
This lol.travel deal was found by Cheapflights users on 7/30. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/412:35 pmOPO - DCA
1 stop14h 01mUnited Airlines
sáb. 9/203:29 pmDCA - OPO
1 stop10h 26mUnited Airlines
Deal found 7/30$566
This Booking.com deal was found by Cheapflights users on 7/29. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/246:00 amOPO - IAD
1 stop14h 50mLufthansa
sáb. 1/36:00 pmIAD - OPO
1 stop16h 05mLufthansa
Deal found 7/29$569
This United Airlines deal was found by Cheapflights users on 7/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/226:00 amOPO - IAD
1 stop13h 35mUnited Airlines
mar. 12/306:30 amIAD - OPO
2 stops24h 10mUnited Airlines
Deal found 7/29$570
This Delta deal was found by Cheapflights users on 7/29. 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.
jue. 9/186:30 amOPO - BWI
2 stops21h 27mDelta
mié. 10/15:15 pmBWI - OPO
2 stops17h 20mDelta
Deal found 7/29$579
This American Airlines deal was found by Cheapflights users on 7/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/188:15 amOPO - DCA
2 stops15h 45mAmerican Airlines
mié. 10/11:15 pmDCA - OPO
2 stops13h 20mAmerican Airlines
Deal found 7/29$579
This Iberia deal was found by Cheapflights users on 7/30. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/1812:20 pmOPO - DCA
2 stops15h 47mIberia
mié. 10/11:15 pmDCA - OPO
2 stops13h 20mIberia
Deal found 7/30$600

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 julio 30, 2025.
Use the filters below to find and compare flights from Porto to Washington, D.C. that are best for you.

Fly from

Porto

Fly to

Washington, D.C.

Route

Depart

Return

Price

PortoBaltimore

OPO - BWI

OPOBWI

Porto

jue. 9/4

9:20 pm-5:40 pm

1 stop25h 20m

Baltimore/Washington

sáb. 9/20

6:50 pm-8:05 pm

1 stop20h 15m

$437

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

jue. 9/18

9:15 pm-3:20 pm

1 stop23h 05m

Washington, D.C. Dulles Intl

mié. 10/1

10:20 pm-5:05 pm

1 stop13h 45m

$482

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

mié. 10/8

6:15 am-3:35 pm

1 stop14h 20m

Washington, D.C. Dulles Intl

mar. 10/21

7:59 pm-3:30 pm

2 stops14h 31m

$553

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

jue. 9/4

6:30 am-6:14 pm

2 stops16h 44m

Washington, D.C. Reagan-National

sáb. 9/20

5:15 pm-3:30 pm

2 stops17h 15m

$559

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

jue. 9/18

8:20 pm-3:35 pm

1 stop24h 15m

Washington, D.C. Dulles Intl

mié. 10/1

9:20 pm-8:25 am

1 stop30h 05m

$560

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

jue. 9/18

8:15 am-3:00 pm

1 stop11h 45m

Washington, D.C. Dulles Intl

mié. 10/1

4:35 pm-7:35 am

1 stop10h 00m

$564

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

jue. 9/4

12:35 pm-9:36 pm

1 stop14h 01m

Washington, D.C. Reagan-National

sáb. 9/20

3:29 pm-6:55 am

1 stop10h 26m

$566

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

jue. 9/18

8:15 am-7:00 pm

2 stops15h 45m

Washington, D.C. Reagan-National

mié. 10/1

1:15 pm-7:35 am

2 stops13h 20m

$579

PortoBaltimore

OPO - BWI

OPOBWI

Porto

jue. 9/18

6:30 am-10:57 pm

2 stops21h 27m

Baltimore/Washington

mié. 10/1

5:15 pm-3:35 pm

2 stops17h 20m

$579

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

jue. 9/18

12:20 pm-11:07 pm

2 stops15h 47m

Washington, D.C. Reagan-National

mié. 10/1

1:15 pm-7:35 am

2 stops13h 20m

$600

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 44 results
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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 time of day to fly from OPO to WAS?

Find hourly flight availability from Porto to Washington, D.C.. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated julio 30, 2025.

A simple way to save on the total cost of your ticket is to fly from Porto to Washington, D.C. in the morning. If you’re flexible enough to do this you can expect to save up to 32% on your trip compared to booking a flight at noon.

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 julio 30, 2025.
See what other customers who have flown with Delta, KLM, and SWISS 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.
Delta
8.0
Very good
7,980 reviews

Overall

8.0

Entertainment

7.9

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Delta
8.0
Very good
7,980 reviews
Delta
8.0
Very good
7,980 reviews

Overall

8.0

Entertainment

7.9

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
KLM
7.8
Good
1,383 reviews
Delta
8.0
Very good
7,980 reviews

Overall

8.0

Entertainment

7.9

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
SWISS
7.5
Good
1,686 reviews
Delta
8.0
Very good
7,980 reviews

Overall

8.0

Entertainment

7.9

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
United Airlines
7.4
Good
8,896 reviews
Delta
8.0
Very good
7,980 reviews

Overall

8.0

Entertainment

7.9

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Scandinavian Airlines
7.3
Good
1,453 reviews
Delta
8.0
Very good
7,980 reviews

Overall

8.0

Entertainment

7.9

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.

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.

  • What are the cheapest airlines flying from Porto to Washington, D.C. round-trip?

    According to our current data, PLAY ($437), TAP AIR PORTUGAL ($482), and Delta ($553) offers the cheapest pricing from Porto to Washington, D.C.. You may be able to fly from Porto to Washington, D.C. for 34% less than the average price by searching for these airlines.

  • 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 $394 on WorldTicket. Other airlines that offer cheap prices include Royal Air Maroc from $394 and TAP AIR PORTUGAL from $426 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. Dulles Intl 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, August is the cheapest month in which you can book a flight from Porto to Washington, D.C. (average of $241). Flying from Porto to Washington, D.C. in March is currently the most expensive (average of $290). 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
Woodbridge
Arlington
Alexandria
Tysons
Silver Spring
Fredericksburg
Gaithersburg
Towson
Linthicum Heights
Easton
Fairfax
Manassas
Falls Church
Waldorf
Laurel
Rockville
Oxon Hill
National Harbor
Dundalk
Bowie

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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
Lisbon to Reagan-National flights
Porto to Dulles Intl flights
Porto to Reagan-National 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 julio 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$492Average$812FlexibilityNo cancel feeOn-timeN/A

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