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$246+ 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 1/17. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — OPO
Dec 6 — Dec 131
Sat 12/6
Sat 12/13
1 adult, Economy
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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 November 6, 2025.

This Air France deal was found by Cheapflights users on 11/5. 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.
Mon 11/2412:37 pmPHL - OPO
2 stops16h 53mMultiple Airlines
Wed 12/1011:15 amOPO - PHL
2 stops18h 36mMultiple Airlines
Deal found 11/5$481
This United Airlines deal was found by Cheapflights users on 11/5. 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 11/2410:05 amPHL - OPO
2 stops18h 25mUnited Airlines
Wed 12/1012:30 pmOPO - PHL
1 stop32h 35mUnited Airlines
Deal found 11/5$487
This FlightHub deal was found by Cheapflights users on 11/5. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/15:30 pmIAD - OPO
1 stop12h 35mTAP AIR PORTUGAL
Thu 4/3012:30 pmOPO - IAD
1 stop13h 05mTAP AIR PORTUGAL
Deal found 11/5$491
This Delta deal was found by Cheapflights users on 11/5. 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 12/311:13 amDCA - OPO
2 stops18h 17mDelta
Wed 12/106:00 amOPO - DCA
2 stops21h 57mDelta
Deal found 11/5$491
This Delta deal was found by Cheapflights users on 11/3. 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.
Tue 12/212:19 pmBWI - OPO
2 stops17h 11mDelta
Fri 12/126:30 amOPO - BWI
2 stops17h 32mDelta
Deal found 11/3$492
This FlightHub deal was found by Cheapflights users on 11/4. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/249:45 amIAD - OPO
2 stops22h 05mMultiple Airlines
Tue 12/24:15 pmOPO - IAD
2 stops33h 44mMultiple Airlines
Deal found 11/4$494
This FlightHub deal was found by Cheapflights users on 11/4. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/36:00 amDCA - OPO
2 stops26h 15mAir Canada
Mon 12/86:00 amOPO - DCA
2 stops57h 21mAir Canada
Deal found 11/4$494
This British Airways deal was found by Cheapflights users on 11/5. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/246:35 pmPHL - OPO
1 stop18h 00mBritish Airways
Wed 12/108:40 pmOPO - PHL
1 stop23h 50mBritish Airways
Deal found 11/5$495
This Delta deal was found by Cheapflights users on 11/4. 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.
Tue 11/257:01 amIAD - OPO
2 stops22h 29mDelta
Mon 12/86:30 amOPO - IAD
2 stops41h 49mDelta
Deal found 11/4$497
This FlightHub deal was found by Cheapflights users on 11/4. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/266:00 amDCA - OPO
2 stops24h 15mMultiple Airlines
Mon 12/86:00 amOPO - DCA
2 stops57h 21mMultiple Airlines
Deal found 11/4$497
This United Airlines deal was found by Cheapflights users on 11/6. 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 11/263:00 pmPHL - OPO
2 stops13h 30mUnited Airlines
Mon 12/112:30 pmOPO - PHL
1 stop32h 35mUnited Airlines
Deal found 11/6$497
This Delta deal was found by Cheapflights users on 11/3. 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.
Tue 12/212:19 pmIAD - OPO
2 stops17h 11mDelta
Fri 12/1211:20 amOPO - IAD
2 stops16h 48mDelta
Deal found 11/3$498

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 November 6, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$473
(Mytrip)

One-way from

$246
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$630
Provider with most accurate pricing for Washington, D.C. (WAS)-Porto flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Porto flights.
Search Deals
From Maryland to Porto
Search Deals
One-way flight from Maryland to Porto
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($132 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

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 November 6, 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

Mon 11/24

12:37 pm-10:30 am

2 stops16h 53m

Porto

Wed 12/10

11:15 am-12:51 am

2 stops18h 36m

$481

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Mon 11/24

10:05 am-9:30 am

2 stops18h 25m

Porto

Wed 12/10

12:30 pm-4:05 pm

1 stop32h 35m

$487

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Sun 1/11

5:15 pm-11:40 am

1 stop13h 25m

Porto

Tue 1/20

6:00 am-2:35 pm

1 stop13h 35m

$488

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Mon 1/12

12:23 pm-10:30 am

2 stops17h 07m

Porto

Fri 1/23

6:30 am-11:06 pm

2 stops21h 36m

$491

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Wed 1/14

12:23 pm-10:30 am

2 stops17h 07m

Porto

Fri 1/23

6:30 am-8:47 pm

2 stops19h 17m

$491

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Wed 1/21

12:23 pm-10:30 am

2 stops17h 07m

Porto

Fri 2/6

6:30 am-7:09 pm

2 stops17h 39m

$491

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Mon 1/12

1:02 pm-10:30 am

2 stops16h 28m

Porto

Mon 1/19

11:15 am-5:48 pm

2 stops35h 33m

$491

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Wed 1/21

10:54 am-10:30 am

2 stops18h 36m

Porto

Fri 2/6

11:15 am-12:45 am

2 stops18h 30m

$491

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Mon 1/12

4:45 pm-10:30 am

2 stops36h 45m

Porto

Wed 1/21

6:00 am-7:12 pm

2 stops18h 12m

$491

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Sun 1/11

7:55 pm-10:30 am

2 stops33h 35m

Porto

Wed 1/21

11:15 am-12:45 am

2 stops18h 30m

$491

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/5

Showing 1-10 of 60 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 November 6, 2025.

One of the essential ways to save on airfare from Maryland to Porto is to remain as flexible as possible. Flights that are in the evening tend to be the most expensive. A flight at noon could potentially save you up to 44% on airfare.

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 17h 07m. United Airlines provides one of the quickest options available for as low as $491. The distance from Maryland to Porto is about 3537 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.

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
Vila Nova de Gaia

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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 November 6, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$529Average$782FlexibilityNo cancel feeOn-timeN/A

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