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$358+ Cheap flights from Porto (OPO) to Maryland

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 3/24. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — BWI
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap flight deals from Porto to Maryland

Cheapest flights from Porto to Maryland
Explore the most affordable flight options available from Porto to Maryland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2025.

This Ovago deal was found by Cheapflights users on 12/17. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/246:00 amOPO - IAD
1 stop19h 15mMultiple Airlines
Sat 1/35:45 pmIAD - OPO
1 stop13h 20mMultiple Airlines
Deal found 12/17$883
This Ovago deal was found by Cheapflights users on 12/17. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/228:20 amOPO - PHL
2 stops17h 07mIberia
Mon 12/297:50 pmPHL - OPO
1 stop30h 50mIberia
Deal found 12/17$922
This United Airlines deal was found by Cheapflights users on 12/16. 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.
Wed 12/246:00 amOPO - IAD
1 stop19h 15mUnited Airlines
Sat 1/310:05 pmIAD - OPO
1 stop31h 30mUnited Airlines
Deal found 12/16$950
This Ovago deal was found by Cheapflights users on 12/16. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/228:40 pmOPO - PHL
1 stop23h 55mMultiple Airlines
Mon 12/297:50 pmPHL - OPO
1 stop30h 50mMultiple Airlines
Deal found 12/16$995
This United Airlines deal was found by Cheapflights users on 12/16. 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.
Wed 12/2412:30 pmOPO - DCA
2 stops39h 05mUnited Airlines
Sat 1/38:40 pmDCA - OPO
2 stops34h 00mUnited Airlines
Deal found 12/16$1,014
This American Airlines deal was found by Cheapflights users on 12/17. 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 12/228:20 amOPO - PHL
2 stops17h 07mAmerican Airlines
Mon 12/294:39 pmPHL - OPO
2 stops18h 21mAmerican Airlines
Deal found 12/17$1,043
This American Airlines deal was found by Cheapflights users on 12/17. 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.
Wed 12/178:40 pmOPO - IAD
2 stops52h 15mMultiple Airlines
Sun 12/216:20 pmIAD - OPO
1 stop17h 20mMultiple Airlines
Deal found 12/17$1,070
This Cheapflightsfares deal was found by Cheapflights users on 12/17. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/244:15 pmOPO - IAD
2 stops27h 20mLufthansa
Sat 1/36:10 pmIAD - OPO
2 stops23h 15mLufthansa
Deal found 12/17$1,080
This American Airlines deal was found by Cheapflights users on 12/17. 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.
Wed 12/178:40 pmOPO - IAD
2 stops52h 15mAmerican Airlines
Sun 12/216:20 pmIAD - OPO
2 stops32h 20mAmerican Airlines
Deal found 12/17$1,083
This AirNGo deal was found by Cheapflights users on 12/15. 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 AirNGo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/318:40 pmOPO - DCA
2 stops27h 00mBritish Airways
Sun 1/42:00 pmDCA - OPO
2 stops46h 35mBritish Airways
Deal found 12/15$1,290
This Air Canada deal was found by Cheapflights users on 12/15. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/248:55 amOPO - DCA
2 stops14h 10mAir Canada
Sat 1/36:00 amDCA - OPO
2 stops27h 00mAir Canada
Deal found 12/15$1,304
This Cheapflightsfares deal was found by Cheapflights users on 12/16. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/247:20 pmOPO - IAD
2 stops29h 55mSWISS
Sat 1/36:10 pmIAD - OPO
2 stops19h 25mSWISS
Deal found 12/16$1,308

Find flight deals from Porto to Maryland

Keep the following information in mind while searching for Porto to Maryland flight deals. Data was last updated December 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$506
(oojo)

One-way from

$358
(Travelocity)

Popular in

July

Cheapest in

May

Average price

$626
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 Maryland
Search Deals
One-way flight from Porto to Maryland
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($94 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Porto to Maryland 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 December 18, 2025.
Use the filters below to find and compare flights from Porto to Maryland that are best for you.

Fly from

Porto

Fly to

Maryland

Route

Depart

Return

Price

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Fri 1/30

2:20 pm-9:00 pm

1 stop11h 40m

Washington, D.C. Dulles Intl

Fri 2/6

10:30 pm-5:00 pm

1 stop13h 30m

$506

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 1/29

7:00 am-3:15 pm

1 stop13h 15m

Washington, D.C. Dulles Intl

Thu 2/5

5:30 pm-9:55 am

1 stop11h 25m

$508

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Fri 3/13

6:00 am-3:35 pm

1 stop13h 35m

Washington, D.C. Dulles Intl

Sun 4/12

5:37 pm-9:45 am

1 stop11h 08m

$591

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 3/16

6:00 am-9:15 pm

1 stop19h 15m

Washington, D.C. Dulles Intl

Sun 4/12

8:20 pm-6:30 pm

1 stop17h 10m

$591

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Sat 3/14

6:00 am-4:50 pm

1 stop14h 50m

Washington, D.C. Dulles Intl

Mon 4/13

5:37 pm-9:45 am

1 stop11h 08m

$591

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Sat 3/14

6:00 am-4:50 pm

1 stop14h 50m

Washington, D.C. Dulles Intl

Sun 4/12

5:37 pm-9:45 am

1 stop11h 08m

$591

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Wed 3/18

6:00 am-8:59 pm

2 stops18h 59m

Washington, D.C. Reagan-National

Mon 4/13

6:00 pm-9:45 am

1 stop10h 45m

$597

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Sun 3/15

12:30 pm-8:51 am

2 stops24h 21m

Washington, D.C. Reagan-National

Mon 4/13

5:00 pm-9:45 am

1 stop11h 45m

$597

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Wed 3/18

6:00 am-8:59 pm

2 stops18h 59m

Washington, D.C. Reagan-National

Sun 4/12

7:00 pm-9:45 am

1 stop9h 45m

$597

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Thu 3/5

6:00 am-8:55 am

2 stops31h 55m

Washington, D.C. Reagan-National

Mon 3/9

8:10 pm-9:30 am

1 stop9h 20m

$597

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Showing 1-10 of 56 results
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Best time to book a flight from Porto to Maryland

Have a flexible travel schedule? Discover the best time to fly to Maryland 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 Maryland
No data available for this route at this time. Please check back soon.

Related info for your journey

Find useful and relevant information for your journey from Porto to Maryland. 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 Maryland?

    Located just 6.8 mi from the city center, Porto (OPO) is the airport most travelers will use when flying to Maryland from Porto.

  • How long is the flight from Porto to Maryland?

    Airlines like TAP AIR PORTUGAL, United Airlines, and Delta fly from Porto to Maryland in about 11h 40m. The time it takes to get you to your destination can typically vary by up to 7h 27m. Porto and Maryland are separated by a distance of 3537 mi. This flight may include one or multiple stops.

  • What are the most popular routes from Porto to Maryland?

    The most popular flight routes from Porto to Maryland are Porto - Washington, D.C. Dulles Intl, Porto - Baltimore/Washington and Porto - Philadelphia.

  • Can I find deals for flights from Porto to Maryland that include hotel bookings?

    Yes. In addition to deals on Porto to Maryland flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Porto to Maryland?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Porto to Maryland.

  • Can I find deals for business class flights from Porto to Maryland?

    Yes. Cheapflights offers flight deals from Porto to Maryland 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

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