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$301+ 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 5/14. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — BWI
Apr 5 — Apr 121
Sat 4/5
Sat 4/12
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 March 31, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$434
(Mytrip)

One-way from

$301
(Mytrip)

Popular in

January

Cheapest in

November

Average price

$638
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. 5% potential increase in price ($45 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($21 potential savings vs. average RT price).
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Average for round-trip flights in March 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 March 31, 2025.

This Mytrip deal was found by Cheapflights users on 3/30. 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 5/19:10 pmOPO - BWI
1 stop25h 30mPLAY
Wed 5/146:50 pmBWI - OPO
1 stop20h 20mPLAY
Deal found 3/30$434
This American Airlines deal was found by Cheapflights users on 3/30. 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 4/108:15 amOPO - BWI
2 stops18h 34mAmerican Airlines
Sun 4/207:30 amBWI - OPO
2 stops23h 10mAmerican Airlines
Deal found 3/30$529
This American Airlines deal was found by Cheapflights users on 3/30. 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 4/108:15 amOPO - DCA
2 stops19h 00mAmerican Airlines
Sat 4/199:59 pmDCA - OPO
2 stops32h 41mAmerican Airlines
Deal found 3/30$529
This KLM deal was found by Cheapflights users on 3/31. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/124:20 pmOPO - IAD
1 stop28h 15mKLM
Sat 4/195:25 pmIAD - OPO
1 stop19h 15mKLM
Deal found 3/31$534
This British Airways deal was found by Cheapflights users on 3/31. 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 5/18:15 amOPO - IAD
1 stop11h 45mBritish Airways
Wed 5/1410:40 pmIAD - OPO
1 stop15h 00mBritish Airways
Deal found 3/31$536
This Delta deal was found by Cheapflights users on 3/31. 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 4/126:40 amOPO - IAD
1 stop13h 55mDelta
Sat 4/196:05 pmIAD - OPO
2 stops16h 30mDelta
Deal found 3/31$539
This British Airways deal was found by Cheapflights users on 3/30. 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 4/109:55 amOPO - BWI
1 stop14h 40mBritish Airways
Sat 4/199:20 pmBWI - OPO
1 stop18h 15mBritish Airways
Deal found 3/30$540
This Delta deal was found by Cheapflights users on 3/30. 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 4/106:30 amOPO - DCA
2 stops21h 12mDelta
Sat 4/194:31 pmDCA - OPO
2 stops18h 04mDelta
Deal found 3/30$540
This Mytrip deal was found by Cheapflights users on 3/31. 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 5/1510:25 amOPO - IAD
1 stop33h 10mMultiple Airlines
Thu 5/2210:20 pmIAD - OPO
1 stop20h 00mMultiple Airlines
Deal found 3/31$557
This Gotogate deal was found by Cheapflights users on 3/31. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/156:15 amOPO - IAD
2 stops14h 35mLufthansa
Thu 5/2210:20 pmIAD - OPO
1 stop20h 00mLufthansa
Deal found 3/31$592
This SWISS deal was found by Cheapflights users on 3/30. 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.
Thu 4/1012:15 pmOPO - IAD
1 stop33h 00mSWISS
Sat 4/2610:15 pmIAD - OPO
2 stops52h 40mSWISS
Deal found 3/30$628
This Delta deal was found by Cheapflights users on 3/31. 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 4/246:30 amOPO - BWI
2 stops15h 20mDelta
Sat 5/106:23 pmBWI - OPO
2 stops16h 07mDelta
Deal found 3/31$634

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 March 31, 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 5/1

9:10 pm-5:40 pm

1 stop25h 30m

Baltimore/Washington

Wed 5/14

6:50 pm-8:10 pm

1 stop20h 20m

$434

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Thu 4/10

8:15 am-9:49 pm

2 stops18h 34m

Baltimore/Washington

Sun 4/20

7:30 am-11:40 am

2 stops23h 10m

$529

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Thu 4/10

8:15 am-10:15 pm

2 stops19h 00m

Washington, D.C. Reagan-National

Sat 4/19

9:59 pm-11:40 am

2 stops32h 41m

$529

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Sat 4/12

4:20 pm-3:35 pm

1 stop28h 15m

Washington, D.C. Dulles Intl

Sat 4/19

5:25 pm-5:40 pm

1 stop19h 15m

$534

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 5/1

8:15 am-3:00 pm

1 stop11h 45m

Washington, D.C. Dulles Intl

Wed 5/14

10:40 pm-6:40 pm

1 stop15h 00m

$536

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Sat 4/12

6:40 am-3:35 pm

1 stop13h 55m

Washington, D.C. Dulles Intl

Sat 4/19

6:05 pm-3:35 pm

2 stops16h 30m

$539

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Thu 4/10

9:55 am-7:35 pm

1 stop14h 40m

Baltimore/Washington

Sat 4/19

9:20 pm-8:35 pm

1 stop18h 15m

$540

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Thu 4/10

6:30 am-10:42 pm

2 stops21h 12m

Washington, D.C. Reagan-National

Sat 4/19

4:31 pm-3:35 pm

2 stops18h 04m

$540

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 5/15

10:25 am-2:35 pm

1 stop33h 10m

Washington, D.C. Dulles Intl

Thu 5/22

10:20 pm-11:20 pm

1 stop20h 00m

$557

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 5/15

6:15 am-3:50 pm

2 stops14h 35m

Washington, D.C. Dulles Intl

Thu 5/22

10:20 pm-11:20 pm

1 stop20h 00m

$592

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/30

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

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 March 31, 2025.
Read reviews from past customers who have flown Delta, KLM and Air Transat 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
7,899 reviews

Boarding

8.2

Comfort

8.0

Overall

8.0

Food

7.3

Entertainment

7.9

Crew

8.5

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
7,899 reviews
Delta
8.0
Very good
7,899 reviews

Boarding

8.2

Comfort

8.0

Overall

8.0

Food

7.3

Entertainment

7.9

Crew

8.5

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
1,321 reviews
Delta
8.0
Very good
7,899 reviews

Boarding

8.2

Comfort

8.0

Overall

8.0

Food

7.3

Entertainment

7.9

Crew

8.5

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 Transat
7.8
Good
381 reviews
Delta
8.0
Very good
7,899 reviews

Boarding

8.2

Comfort

8.0

Overall

8.0

Food

7.3

Entertainment

7.9

Crew

8.5

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
Austrian Airlines
7.6
Good
770 reviews
Delta
8.0
Very good
7,899 reviews

Boarding

8.2

Comfort

8.0

Overall

8.0

Food

7.3

Entertainment

7.9

Crew

8.5

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
1,570 reviews
Delta
8.0
Very good
7,899 reviews

Boarding

8.2

Comfort

8.0

Overall

8.0

Food

7.3

Entertainment

7.9

Crew

8.5

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?

    $361 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 TAP AIR PORTUGAL and Air Transat, with prices starting from $397 and $503, respectively.

  • 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 - Washington, D.C. Reagan-National 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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