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$312+ 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 10/18. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — BWI
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$486
(Delta)

One-way from

$312
(Kiwi.com)

Popular in

June

Cheapest in

May

Average price

$1,028
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. 11% potential increase in price ($89 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($31 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This Booking.com deal was found by Cheapflights users on 6/10. 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.
Wed 12/2412:55 pmOPO - IAD
1 stop30h 40mBrussels Airlines
Sat 1/35:45 pmIAD - OPO
1 stop13h 20mBrussels Airlines
Deal found 6/10$417
This Delta deal was found by Cheapflights users on 6/12. 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 6/236:30 amOPO - IAD
1 stop14h 05mDelta
Wed 7/99:20 pmIAD - OPO
1 stop13h 10mDelta
Deal found 6/12$486
This American Airlines deal was found by Cheapflights users on 6/11. 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.
Wed 10/88:15 amOPO - IAD
1 stop11h 45mAmerican Airlines
Tue 10/214:35 pmIAD - OPO
1 stop14h 05mAmerican Airlines
Deal found 6/11$491
This oojo deal was found by Cheapflights users on 6/12. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/810:25 pmOPO - IAD
1 stop21h 55mTAP AIR PORTUGAL
Tue 10/215:00 pmIAD - OPO
1 stop16h 05mTAP AIR PORTUGAL
Deal found 6/12$492
This KLM deal was found by Cheapflights users on 6/12. 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 6/224:20 pmOPO - IAD
1 stop28h 15mKLM
Mon 7/75:25 pmIAD - OPO
1 stop17h 10mKLM
Deal found 6/12$493
This Delta deal was found by Cheapflights users on 6/12. 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 6/2311:25 amOPO - DCA
2 stops17h 08mDelta
Wed 7/91:25 pmDCA - OPO
2 stops16h 15mDelta
Deal found 6/12$498
This Iberia deal was found by Cheapflights users on 6/12. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/812:20 pmOPO - DCA
2 stops15h 35mIberia
Tue 10/215:44 pmDCA - OPO
2 stops12h 56mIberia
Deal found 6/12$514
This American Airlines deal was found by Cheapflights users on 6/12. 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.
Sun 7/2712:20 pmOPO - DCA
2 stops15h 51mAmerican Airlines
Sun 8/32:54 pmDCA - OPO
2 stops15h 46mAmerican Airlines
Deal found 6/12$532
This Air Canada deal was found by Cheapflights users on 6/10. 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 6/10$563
This Lufthansa deal was found by Cheapflights users on 6/10. 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 12/246:00 amOPO - IAD
1 stop14h 50mLufthansa
Sat 1/311:10 pmIAD - OPO
1 stop19h 35mLufthansa
Deal found 6/10$581
This FlightHub deal was found by Cheapflights users on 6/10. 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 10/86:00 amOPO - IAD
2 stops20h 05mAir Canada
Tue 10/219:45 amIAD - OPO
2 stops25h 00mAir Canada
Deal found 6/10$583
This British Airways deal was found by Cheapflights users on 6/10. 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.
Tue 7/2912:20 pmOPO - DCA
2 stops15h 51mBritish Airways
Tue 8/197:32 pmDCA - OPO
2 stops31h 03mBritish Airways
Deal found 6/10$607

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 June 12, 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 - IAD

OPOIAD

Porto

Mon 6/23

6:30 am-3:35 pm

1 stop14h 05m

Washington, D.C. Dulles Intl

Wed 7/9

9:20 pm-3:30 pm

1 stop13h 10m

$486

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Wed 10/8

8:15 am-3:00 pm

1 stop11h 45m

Washington, D.C. Dulles Intl

Tue 10/21

4:35 pm-11:40 am

1 stop14h 05m

$491

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Wed 10/8

10:25 pm-3:20 pm

1 stop21h 55m

Washington, D.C. Dulles Intl

Tue 10/21

5:00 pm-2:05 pm

1 stop16h 05m

$492

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Sun 6/22

4:20 pm-3:35 pm

1 stop28h 15m

Washington, D.C. Dulles Intl

Mon 7/7

5:25 pm-3:35 pm

1 stop17h 10m

$493

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Mon 6/23

11:25 am-11:33 pm

2 stops17h 08m

Washington, D.C. Reagan-National

Wed 7/9

1:25 pm-10:40 am

2 stops16h 15m

$498

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Wed 10/8

12:20 pm-10:55 pm

2 stops15h 35m

Washington, D.C. Reagan-National

Tue 10/21

5:44 pm-11:40 am

2 stops12h 56m

$514

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

$563

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Wed 10/8

6:00 am-9:05 pm

2 stops20h 05m

Washington, D.C. Dulles Intl

Tue 10/21

9:45 am-3:45 pm

2 stops25h 00m

$583

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Wed 10/8

6:00 am-3:50 pm

1 stop14h 50m

Washington, D.C. Dulles Intl

Tue 10/21

10:20 pm-10:50 pm

2 stops19h 30m

$590

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Tue 7/29

12:20 pm-11:11 pm

2 stops15h 51m

Washington, D.C. Reagan-National

Tue 8/19

7:32 pm-7:35 am

2 stops31h 03m

$607

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

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 June 12, 2025.
Read reviews from past customers who have flown Delta, KLM and Austrian Airlines 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
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,950 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,358 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Austrian Airlines
7.6
Good
802 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
SWISS
7.5
Good
1,623 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,790 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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?

    $386 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 Iberia and PLAY, with prices starting from $491 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. Reagan-National, Porto - Baltimore/Washington 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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