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$230+ Cheap flights from Maryland to Porto (OPO)

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 10/11. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — OPO
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheap flight deals from Maryland to Porto

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

Round-trip from

$473
(lol.travel)

One-way from

$230
(Kiwi.com)

Popular in

June

Cheapest in

November

Average price

$718
From Maryland to Porto
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One-way flight from Maryland to Porto
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Highest demand for flights based on searches. 18% potential increase in price ($159 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($20 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 Maryland to Porto

Cheapest flights from Maryland to Porto
Explore the most affordable flight options available from Maryland to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2025.

This lol.travel deal was found by Cheapflights users on 9/16. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/195:35 pmPHL - OPO
1 stop17h 05mUnited Airlines
Tue 11/46:00 amOPO - PHL
1 stop15h 05mUnited Airlines
Deal found 9/16$473
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/273:00 pmPHL - OPO
2 stops14h 30mUnited Airlines
Tue 11/46:00 amOPO - PHL
1 stop15h 05mUnited Airlines
Deal found 9/15$478
This Booking.com deal was found by Cheapflights users on 9/16. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/194:50 pmPHL - OPO
2 stops20h 25mAir Canada
Tue 11/46:00 amOPO - PHL
2 stops21h 56mAir Canada
Deal found 9/16$481
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/2610:34 amPHL - OPO
2 stops18h 56mUnited Airlines
Tue 11/46:00 amOPO - PHL
1 stop15h 05mUnited Airlines
Deal found 9/15$484
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/268:00 pmPHL - OPO
2 stops33h 30mUnited Airlines
Wed 11/512:35 pmOPO - PHL
2 stops26h 11mUnited Airlines
Deal found 9/15$487
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/195:35 pmPHL - OPO
1 stop17h 05mLufthansa
Tue 11/46:00 amOPO - PHL
1 stop15h 05mLufthansa
Deal found 9/15$489
This Delta deal was found by Cheapflights users on 9/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/37:45 pmBWI - OPO
2 stops14h 40mDelta
Tue 11/1111:10 amOPO - BWI
2 stops16h 50mDelta
Deal found 9/16$491
This United Airlines deal was found by Cheapflights users on 9/16. 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.
Sun 10/2610:34 amPHL - OPO
2 stops18h 56mUnited Airlines
Thu 11/66:00 amOPO - PHL
1 stop15h 05mUnited Airlines
Deal found 9/16$491
This United Airlines deal was found by Cheapflights users on 9/16. 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.
Sun 10/2610:34 amPHL - OPO
2 stops18h 56mUnited Airlines
Fri 11/76:00 amOPO - PHL
2 stops32h 38mUnited Airlines
Deal found 9/16$495
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2712:40 pmPHL - OPO
2 stops16h 50mUnited Airlines
Wed 11/512:30 pmOPO - PHL
1 stop32h 35mUnited Airlines
Deal found 9/15$498
This United Airlines deal was found by Cheapflights users on 9/13. 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 10/296:15 amBWI - OPO
2 stops29h 10mUnited Airlines
Wed 11/512:35 pmOPO - BWI
2 stops26h 24mUnited Airlines
Deal found 9/13$500
This United Airlines deal was found by Cheapflights users on 9/16. 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.
Tue 10/286:40 pmPHL - OPO
1 stop13h 00mUnited Airlines
Tue 11/46:00 amOPO - PHL
1 stop15h 05mUnited Airlines
Deal found 9/16$503

Cheapflights Fare Finder

 
Customize your flight search to find flights from Maryland to Porto 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 Maryland to Porto that are best for you.

Fly from

Maryland

Fly to

Porto

Route

Depart

Return

Price

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Tue 10/28

12:22 pm-9:30 am

2 stops17h 08m

Porto

Tue 11/4

6:00 am-4:05 pm

1 stop15h 05m

$478

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Mon 3/2

12:55 pm-9:30 am

2 stops15h 35m

Porto

Thu 3/12

6:00 am-5:05 pm

1 stop15h 05m

$482

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Tue 10/28

10:05 am-9:30 am

2 stops19h 25m

Porto

Thu 11/6

6:00 am-4:05 pm

1 stop15h 05m

$484

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Mon 10/27

3:00 pm-9:30 am

2 stops14h 30m

Porto

Tue 11/4

6:00 am-4:05 pm

1 stop15h 05m

$485

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Mon 11/3

7:45 pm-3:25 pm

2 stops14h 40m

Porto

Tue 11/11

11:10 am-11:00 pm

2 stops16h 50m

$491

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Mon 3/2

12:55 pm-9:30 am

2 stops15h 35m

Porto

Thu 3/12

6:00 am-12:32 am

2 stops22h 32m

$491

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Tue 10/28

10:34 am-9:30 am

2 stops18h 56m

Porto

Tue 11/4

6:00 am-9:46 am

2 stops32h 46m

$495

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Mon 10/27

10:34 am-9:30 am

2 stops18h 56m

Porto

Fri 11/7

6:00 am-9:38 am

2 stops32h 38m

$495

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Sun 10/26

10:34 am-9:30 am

2 stops18h 56m

Porto

Fri 11/7

6:00 am-9:38 am

2 stops32h 38m

$495

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Mon 3/2

6:10 am-9:30 am

2 stops22h 20m

Porto

Wed 3/11

12:35 pm-12:32 am

2 stops15h 57m

$498

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 58 results
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Best time to book a flight from Maryland to Porto

Have a flexible travel schedule? Discover the best time to fly to Porto from Maryland 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 Maryland to Porto

What is the cheapest time of day to fly from MD to OPO?

Find hourly flight availability from Maryland to Porto. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 16, 2025.

When flying from Maryland to Porto, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Related info for your journey

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

    If you book a flight to Porto from Maryland, you will be flying to Porto, which is the city’s only airport. Porto (OPO) is located 6.8 mi from the center of Porto.

  • How long is the flight from Maryland to Porto?

    A quick flight from Maryland to Porto can take about 14h 40m. United Airlines provides one of the quickest options available for as low as $491. The distance from Maryland to Porto is about 3493 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    When deciding which route to take from Maryland to Porto consider Washington, D.C. Dulles Intl - Porto, Washington, D.C. Reagan-National - Porto or Baltimore/Washington - Porto as they are the most popular.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Maryland to Porto 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 Maryland to Porto?

    Currently, January is the cheapest month in which you can book a flight from Maryland to Porto (average of $523). Flying from Maryland to Porto in June is currently the most expensive (average of $1,027). 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 Porto?

Book flights to Porto if you plan to visit one of these locations
Aveiro
Arcos de Valdevez
Coimbra

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Alternative routes for Maryland to Porto

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from Maryland to Porto

Discover the top airline that operate flights from Maryland to Porto. 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 September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$529Average$701FlexibilityNo cancel feeOn-timeN/A

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