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$328+ 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 10/22. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — BWI
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheap flight deals from Porto to Maryland

Keep the following information in mind while searching for Porto to Maryland flight deals. Data was last updated September 16, 2025.

Round-trip from

$459
(Mytrip)

One-way from

$328
(Kiwi.com)

Popular in

January

Cheapest in

May

Average price

$793
From Porto to Maryland
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One-way flight from Porto to Maryland
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Highest demand for flights based on searches. 15% potential increase in price ($123 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($37 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find 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 September 16, 2025.

This Mytrip deal was found by Cheapflights users on 9/15. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/29:20 pmOPO - BWI
1 stop25h 20mPLAY
Wed 10/156:50 pmBWI - OPO
1 stop20h 30mPLAY
Deal found 9/15$459
This Iberia deal was found by Cheapflights users on 9/14. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/28:15 amOPO - IAD
1 stop11h 45mIberia
Wed 10/154:35 pmIAD - OPO
1 stop18h 20mIberia
Deal found 9/14$530
This Mytrip deal was found by Cheapflights users on 9/15. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/259:20 pmOPO - BWI
1 stop25h 20mPLAY
Wed 10/86:50 pmBWI - OPO
1 stop20h 30mPLAY
Deal found 9/15$535
This American Airlines deal was found by Cheapflights users on 9/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/238:15 amOPO - IAD
1 stop11h 45mAmerican Airlines
Sat 10/412:48 pmIAD - OPO
2 stops13h 47mAmerican Airlines
Deal found 9/15$535
This AirNGo deal was found by Cheapflights users on 9/14. 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 AirNGo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/269:20 amOPO - IAD
1 stop12h 00mKLM
Sat 10/49:20 pmIAD - OPO
1 stop13h 10mKLM
Deal found 9/14$538
This Mytrip deal was found by Cheapflights users on 9/15. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/27:20 pmOPO - IAD
1 stop25h 55mSWISS
Wed 10/158:45 pmIAD - OPO
1 stop16h 45mSWISS
Deal found 9/15$540
This SWISS deal was found by Cheapflights users on 9/14. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/3112:50 pmOPO - IAD
1 stop32h 50mSWISS
Tue 11/115:25 pmIAD - OPO
1 stop12h 50mSWISS
Deal found 9/14$541
This Air France deal was found by Cheapflights users on 9/14. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/14:10 pmOPO - IAD
1 stop28h 55mMultiple Airlines
Mon 11/106:50 pmIAD - OPO
1 stop10h 40mMultiple Airlines
Deal found 9/14$542
This Delta deal was found by Cheapflights users on 9/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/266:40 amOPO - IAD
1 stop13h 55mDelta
Sat 10/48:17 pmIAD - OPO
2 stops14h 13mDelta
Deal found 9/15$544
This American Airlines deal was found by Cheapflights users on 9/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/28:15 amOPO - DCA
2 stops19h 04mAmerican Airlines
Wed 10/155:30 pmDCA - OPO
2 stops13h 10mAmerican Airlines
Deal found 9/14$545
This Delta deal was found by Cheapflights users on 9/14. 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.
Sat 11/16:00 amOPO - IAD
1 stop15h 05mDelta
Tue 11/1111:05 amIAD - OPO
2 stops18h 25mDelta
Deal found 9/14$549
This Delta deal was found by Cheapflights users on 9/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/86:15 amOPO - DCA
2 stops16h 45mDelta
Tue 10/215:00 pmDCA - OPO
2 stops17h 30mDelta
Deal found 9/15$550

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 September 16, 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

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Thu 10/2

9:20 pm-5:40 pm

1 stop25h 20m

Baltimore/Washington

Wed 10/15

6:50 pm-8:20 pm

1 stop20h 30m

$459

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 10/2

8:15 am-3:00 pm

1 stop11h 45m

Washington, D.C. Dulles Intl

Wed 10/15

4:35 pm-7:35 am

1 stop10h 00m

$530

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 10/2

8:15 am-3:00 pm

1 stop11h 45m

Washington, D.C. Dulles Intl

Wed 10/15

4:35 pm-3:55 pm

1 stop18h 20m

$530

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Fri 9/26

9:20 am-4:20 pm

1 stop12h 00m

Washington, D.C. Dulles Intl

Sat 10/4

9:20 pm-3:30 pm

1 stop13h 10m

$538

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Fri 10/31

12:50 pm-5:40 pm

1 stop32h 50m

Washington, D.C. Dulles Intl

Tue 11/11

5:25 pm-11:15 am

1 stop12h 50m

$541

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Wed 10/8

6:15 am-3:35 pm

1 stop14h 20m

Washington, D.C. Dulles Intl

Tue 10/21

7:59 pm-3:30 pm

2 stops14h 31m

$544

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Sat 11/1

9:40 am-5:40 pm

1 stop36h 00m

Washington, D.C. Dulles Intl

Mon 11/10

5:25 pm-11:15 am

1 stop12h 50m

$544

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Wed 10/15

6:15 am-3:35 pm

1 stop14h 20m

Washington, D.C. Dulles Intl

Mon 10/20

7:59 pm-3:30 pm

2 stops14h 31m

$544

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 10/30

7:25 pm-3:35 pm

1 stop24h 10m

Washington, D.C. Dulles Intl

Sun 11/9

5:25 pm-11:10 am

1 stop12h 45m

$544

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Sat 11/1

9:40 am-5:40 pm

1 stop36h 00m

Washington, D.C. Dulles Intl

Tue 11/11

5:25 pm-11:15 am

1 stop12h 50m

$544

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 60 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 PLAY, American Airlines, and Iberia fly from Porto to Maryland in about 11h 45m. The time it takes to get you to your destination can typically vary by up to 13h 35m. 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. Reagan-National, Porto - Washington, D.C. Dulles Intl and Porto - Baltimore/Washington.

  • 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.

  • What is the cheapest month to book a flight from Porto to Maryland?

    Currently, August is the cheapest month in which you can book a flight from Porto to Maryland (average of $241). Flying from Porto to Maryland 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

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