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$336+ 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 4/9. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — BWI
Feb 27 — Mar 61
Thu 2/27
Thu 3/6
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 February 22, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$514
(British Airways)

One-way from

$336
(Mytrip)

Popular in

January

Cheapest in

March
Provider with most accurate pricing for Porto-Washington, D.C. (WAS) flight deals.
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Provider most trusted by Cheapflights users for Porto-Washington, D.C. (WAS) flights.
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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. 8% potential increase in price ($70 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($22 potential savings vs. average RT price).
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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 February 22, 2025.

This British Airways deal was found by Cheapflights users on 2/22. 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.
Sat 4/128:35 pmOPO - IAD
1 stop23h 25mIberia
Sat 4/194:35 pmIAD - OPO
1 stop10h 00mIberia
Deal found 2/22$514
This British Airways deal was found by Cheapflights users on 2/22. 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.
Thu 4/39:40 amOPO - BWI
1 stop14h 55mBritish Airways
Sat 4/199:20 pmBWI - OPO
1 stop18h 10mBritish Airways
Deal found 2/22$525
This Flightnetwork deal was found by Cheapflights users on 2/22. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/46:00 amOPO - DCA
2 stops33h 19mAir Canada
Wed 6/116:00 amDCA - OPO
1 stop22h 30mAir Canada
Deal found 2/22$525
This British Airways deal was found by Cheapflights users on 2/22. 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.
Thu 4/39:40 amOPO - IAD
1 stop15h 30mBritish Airways
Sat 4/195:50 pmIAD - OPO
1 stop21h 40mBritish Airways
Deal found 2/22$525
This Flightnetwork deal was found by Cheapflights users on 2/22. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/46:00 amOPO - IAD
2 stops39h 19mMultiple Airlines
Wed 6/1110:20 pmIAD - OPO
1 stop20h 00mMultiple Airlines
Deal found 2/22$526
This United Airlines deal was found by Cheapflights users on 2/22. 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 6/46:00 amOPO - BWI
2 stops20h 42mUnited Airlines
Wed 6/116:20 amBWI - OPO
2 stops19h 35mUnited Airlines
Deal found 2/22$546
This United Airlines deal was found by Cheapflights users on 2/22. 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 6/46:00 amOPO - IAD
2 stops23h 30mUnited Airlines
Wed 6/118:29 amIAD - OPO
2 stops20h 01mUnited Airlines
Deal found 2/22$546
This United Airlines deal was found by Cheapflights users on 2/22. 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 6/412:35 pmOPO - DCA
1 stop12h 05mUnited Airlines
Wed 6/116:00 amDCA - OPO
1 stop22h 30mUnited Airlines
Deal found 2/22$554
This Lufthansa deal was found by Cheapflights users on 2/22. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/3012:10 pmOPO - IAD
1 stop32h 40mLufthansa
Sun 12/75:50 pmIAD - OPO
1 stop12h 50mLufthansa
Deal found 2/22$563
This Delta deal was found by Cheapflights users on 2/21. 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.
Thu 4/36:30 amOPO - DCA
2 stops21h 12mDelta
Sat 4/196:15 pmDCA - OPO
2 stops16h 20mDelta
Deal found 2/21$575
This SWISS deal was found by Cheapflights users on 2/22. 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.
Mon 3/317:20 pmOPO - IAD
2 stops49h 05mSWISS
Thu 5/158:45 pmIAD - OPO
1 stop30h 10mSWISS
Deal found 2/22$605
This British Airways deal was found by Cheapflights users on 2/22. 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.
Wed 4/28:15 amOPO - PHL
2 stops16h 07mBritish Airways
Tue 4/82:47 pmPHL - OPO
2 stops23h 43mBritish Airways
Deal found 2/22$676

Find flights from Porto to Maryland within your budget

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 February 22, 2025.

Fly from

Porto

Fly to

Maryland

Route

Depart

Return

Price

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Sat 4/12

8:35 pm-3:00 pm

1 stop23h 25m

Washington, D.C. Dulles Intl

Sat 4/19

4:35 pm-7:35 am

1 stop10h 00m

$514

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Thu 4/3

9:40 am-7:35 pm

1 stop14h 55m

Baltimore/Washington

Sat 4/19

9:20 pm-8:30 pm

1 stop18h 10m

$525

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Wed 6/4

6:00 am-10:19 am

2 stops33h 19m

Washington, D.C. Reagan-National

Wed 6/11

6:00 am-9:30 am

1 stop22h 30m

$525

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 4/3

9:40 am-8:10 pm

1 stop15h 30m

Washington, D.C. Dulles Intl

Sat 4/19

5:50 pm-8:30 pm

1 stop21h 40m

$525

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Wed 6/4

6:00 am-4:19 pm

2 stops39h 19m

Washington, D.C. Dulles Intl

Wed 6/11

10:20 pm-11:20 pm

1 stop20h 00m

$526

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Wed 6/4

6:00 am-9:42 pm

2 stops20h 42m

Baltimore/Washington

Wed 6/11

6:20 am-6:55 am

2 stops19h 35m

$546

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Wed 6/4

6:00 am-12:30 am

2 stops23h 30m

Washington, D.C. Dulles Intl

Wed 6/11

8:29 am-9:30 am

2 stops20h 01m

$546

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Wed 6/4

12:35 pm-7:40 pm

1 stop12h 05m

Washington, D.C. Reagan-National

Wed 6/11

6:00 am-9:30 am

1 stop22h 30m

$554

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Sun 3/30

12:10 pm-3:50 pm

1 stop32h 40m

Washington, D.C. Dulles Intl

Sun 12/7

5:50 pm-11:40 am

1 stop12h 50m

$563

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Thu 4/3

6:30 am-10:42 pm

2 stops21h 12m

Washington, D.C. Reagan-National

Sat 4/19

6:15 pm-3:35 pm

2 stops16h 20m

$575

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/22

Showing 1-10 of 52 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.

Travel insights for flights from Porto to Maryland

Get recent, data-driven insights about flights from Porto to Maryland including ideal travel times, pricing trends, and more.

Rainfall in Maryland by month

Plan your trip to Maryland by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Maryland ranges from 2.9 - 4.1 inches per month. July is typically the wettest month, when rainfall can reach 4.1 in. February is typically the driest time to visit Maryland when rainfall is around 2.9 in.

Temperature in Maryland by month

Plan your trip to Maryland by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Maryland, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 77.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 33.8 F).

Reviews of airlines servicing Maryland

Get insights into the airlines that provide service to Maryland. 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 Maryland. Reviews last updated February 22, 2025.
Read reviews from past customers who have flown Delta, KLM and SWISS from Porto to Maryland. 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
8,203 reviews

Entertainment

7.9

Comfort

8.0

Boarding

8.2

Crew

8.5

Overall

8.0

Food

7.3

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta
8.0
Very good
8,203 reviews
Delta
8.0
Very good
8,203 reviews

Entertainment

7.9

Comfort

8.0

Boarding

8.2

Crew

8.5

Overall

8.0

Food

7.3

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

KLM
7.8
Good
1,332 reviews
Delta
8.0
Very good
8,203 reviews

Entertainment

7.9

Comfort

8.0

Boarding

8.2

Crew

8.5

Overall

8.0

Food

7.3

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

SWISS
7.5
Good
1,566 reviews
Delta
8.0
Very good
8,203 reviews

Entertainment

7.9

Comfort

8.0

Boarding

8.2

Crew

8.5

Overall

8.0

Food

7.3

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Air France
7.4
Good
1,447 reviews
Delta
8.0
Very good
8,203 reviews

Entertainment

7.9

Comfort

8.0

Boarding

8.2

Crew

8.5

Overall

8.0

Food

7.3

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

United Airlines
7.4
Good
8,754 reviews
Delta
8.0
Very good
8,203 reviews

Entertainment

7.9

Comfort

8.0

Boarding

8.2

Crew

8.5

Overall

8.0

Food

7.3

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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.

  • What are the cheapest airlines to fly from Porto to Maryland one-way?

    $352 is the cheapest one-way deal found within the past few days, from Royal Air Maroc. You may also be able to find cheap deals on PLAY and British Airways, with prices starting from $461 and $496, respectively.

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

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

  • 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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Alternative routes for Porto to Maryland

See prices for flight routes from nearby airports that may be better suited for you.
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