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$360+ 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 5/29. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — BWI
May 6 — May 131
Tue 5/6
Tue 5/13
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 May 1, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$543
(United Airlines)

One-way from

$360
(Kiwi.com)

Popular in

January

Cheapest in

May

Average price

$580
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. 7% potential increase in price ($57 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($23 potential savings vs. average RT price).
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Average for round-trip flights in May 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 May 1, 2025.

This United Airlines deal was found by Cheapflights users on 4/29. 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 6/811:20 amOPO - DCA
1 stop27h 59mUnited Airlines
Sun 6/229:33 amDCA - OPO
1 stop16h 22mUnited Airlines
Deal found 4/29$543
This United Airlines deal was found by Cheapflights users on 4/29. 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.
Thu 6/1212:10 pmOPO - IAD
1 stop28h 04mUnited Airlines
Wed 6/259:00 amIAD - OPO
1 stop17h 05mUnited Airlines
Deal found 4/29$543
This KLM deal was found by Cheapflights users on 4/29. 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.
Sun 6/86:20 pmOPO - IAD
1 stop26h 15mKLM
Sat 6/215:25 pmIAD - OPO
1 stop19h 15mKLM
Deal found 4/29$557
This Air Canada deal was found by Cheapflights users on 4/30. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/86:00 amOPO - DCA
2 stops20h 51mAir Canada
Tue 10/2111:00 amDCA - OPO
2 stops19h 30mAir Canada
Deal found 4/30$560
This United Airlines deal was found by Cheapflights users on 4/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/149:05 amOPO - BWI
2 stops30h 08mUnited Airlines
Sat 6/216:40 amBWI - OPO
2 stops19h 15mUnited Airlines
Deal found 4/30$561
This British Airways deal was found by Cheapflights users on 4/29. 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.
Sun 6/89:25 pmOPO - IAD
1 stop25h 10mBritish Airways
Sun 6/2210:40 pmIAD - OPO
1 stop16h 40mBritish Airways
Deal found 4/29$561
This British Airways deal was found by Cheapflights users on 4/29. 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.
Sun 6/88:15 amOPO - DCA
2 stops28h 35mBritish Airways
Sun 6/226:59 pmDCA - OPO
2 stops20h 21mBritish Airways
Deal found 4/29$564
This Delta deal was found by Cheapflights users on 4/29. 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.
Sun 6/85:00 amOPO - IAD
1 stop15h 35mDelta
Sat 6/2112:13 pmIAD - OPO
2 stops17h 27mDelta
Deal found 4/29$607
This Lufthansa deal was found by Cheapflights users on 4/29. 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 6/86:15 amOPO - IAD
2 stops36h 15mLufthansa
Sun 6/2210:20 pmIAD - OPO
1 stop17h 40mLufthansa
Deal found 4/29$610
This Cheapflightsfares deal was found by Cheapflights users on 4/30. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/208:15 amOPO - IAD
1 stop11h 45mIberia
Wed 10/14:35 pmIAD - OPO
1 stop10h 00mIberia
Deal found 4/30$614
This Delta deal was found by Cheapflights users on 4/30. 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.
Wed 8/209:20 amOPO - DCA
2 stops19h 10mDelta
Wed 10/15:00 pmDCA - OPO
2 stops17h 30mDelta
Deal found 4/30$643
This Lufthansa deal was found by Cheapflights users on 4/29. 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.
Wed 8/206:00 amOPO - DCA
2 stops18h 03mMultiple Airlines
Wed 10/19:40 amDCA - OPO
2 stops20h 45mMultiple Airlines
Deal found 4/29$669

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 May 1, 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

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Sun 6/8

11:20 am-10:19 am

1 stop27h 59m

Washington, D.C. Reagan-National

Sun 6/22

9:33 am-6:55 am

1 stop16h 22m

$543

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 6/12

12:10 pm-11:14 am

1 stop28h 04m

Washington, D.C. Dulles Intl

Wed 6/25

9:00 am-7:05 am

1 stop17h 05m

$543

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Sun 6/8

6:20 pm-3:35 pm

1 stop26h 15m

Washington, D.C. Dulles Intl

Sat 6/21

5:25 pm-5:40 pm

1 stop19h 15m

$557

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Wed 10/8

6:00 am-9:51 pm

2 stops20h 51m

Washington, D.C. Reagan-National

Tue 10/21

11:00 am-11:30 am

2 stops19h 30m

$560

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Sun 6/8

9:25 pm-5:35 pm

1 stop25h 10m

Washington, D.C. Dulles Intl

Sun 6/22

10:40 pm-8:20 pm

1 stop16h 40m

$561

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Sat 6/14

9:05 am-10:13 am

2 stops30h 08m

Baltimore/Washington

Sat 6/21

6:40 am-6:55 am

2 stops19h 15m

$561

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Sun 6/8

8:15 am-7:50 am

2 stops28h 35m

Washington, D.C. Reagan-National

Sun 6/22

6:59 pm-8:20 pm

2 stops20h 21m

$564

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Sun 6/8

5:00 am-3:35 pm

1 stop15h 35m

Washington, D.C. Dulles Intl

Sat 6/21

12:13 pm-10:40 am

2 stops17h 27m

$607

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Sun 6/8

6:15 am-1:30 pm

2 stops36h 15m

Washington, D.C. Dulles Intl

Sun 6/22

10:20 pm-9:00 pm

1 stop17h 40m

$610

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Wed 8/20

8:15 am-3:00 pm

1 stop11h 45m

Washington, D.C. Dulles Intl

Wed 10/1

4:35 pm-7:35 am

1 stop10h 00m

$614

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 53 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 May 1, 2025.
Read reviews from past customers who have flown Emirates, Delta and KLM from Porto to Maryland. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Emirates
8.0
Very good
3,216 reviews

Overall

8.0

Comfort

8.0

Boarding

8.1

Food

7.8

Crew

8.3

Entertainment

8.2

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jun 2024

DXB - IAH

It was not a good experience the seats were small and uncomfortable the food was not good and they forgot to serve me my breakfast - there were 5 us in 2 rows that they just completely skipped us. Very disappointed.
Emirates
8.0
Very good
3,216 reviews
Emirates
8.0
Very good
3,216 reviews

Overall

8.0

Comfort

8.0

Boarding

8.1

Food

7.8

Crew

8.3

Entertainment

8.2

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jun 2024

DXB - IAH

It was not a good experience the seats were small and uncomfortable the food was not good and they forgot to serve me my breakfast - there were 5 us in 2 rows that they just completely skipped us. Very disappointed.
Delta
8.0
Very good
7,934 reviews
Emirates
8.0
Very good
3,216 reviews

Overall

8.0

Comfort

8.0

Boarding

8.1

Food

7.8

Crew

8.3

Entertainment

8.2

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jun 2024

DXB - IAH

It was not a good experience the seats were small and uncomfortable the food was not good and they forgot to serve me my breakfast - there were 5 us in 2 rows that they just completely skipped us. Very disappointed.
KLM
7.8
Good
1,334 reviews
Emirates
8.0
Very good
3,216 reviews

Overall

8.0

Comfort

8.0

Boarding

8.1

Food

7.8

Crew

8.3

Entertainment

8.2

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jun 2024

DXB - IAH

It was not a good experience the seats were small and uncomfortable the food was not good and they forgot to serve me my breakfast - there were 5 us in 2 rows that they just completely skipped us. Very disappointed.
SWISS
7.5
Good
1,588 reviews
Emirates
8.0
Very good
3,216 reviews

Overall

8.0

Comfort

8.0

Boarding

8.1

Food

7.8

Crew

8.3

Entertainment

8.2

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jun 2024

DXB - IAH

It was not a good experience the seats were small and uncomfortable the food was not good and they forgot to serve me my breakfast - there were 5 us in 2 rows that they just completely skipped us. Very disappointed.
Air France
7.4
Good
1,446 reviews
Emirates
8.0
Very good
3,216 reviews

Overall

8.0

Comfort

8.0

Boarding

8.1

Food

7.8

Crew

8.3

Entertainment

8.2

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jun 2024

DXB - IAH

It was not a good experience the seats were small and uncomfortable the food was not good and they forgot to serve me my breakfast - there were 5 us in 2 rows that they just completely skipped us. Very disappointed.

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?

    $384 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 PLAY, with prices starting from $418 and $472, 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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