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$337+ 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 10/14. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — BWI
ago. 4 — ago. 111
lun. 8/4
lun. 8/11
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 julio 30, 2025.

Round-trip from

$437
(Mytrip)

One-way from

$337
(Mytrip)

Popular in

September

Cheapest in

May

Average price

$771
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. 4% potential increase in price ($29 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in July 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 julio 30, 2025.

This Mytrip deal was found by Cheapflights users on 7/30. 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.
jue. 9/49:20 pmOPO - BWI
1 stop25h 20mPLAY
sáb. 9/206:50 pmBWI - OPO
1 stop20h 15mPLAY
Deal found 7/30$437
This lol.travel deal was found by Cheapflights users on 7/29. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/189:15 pmOPO - IAD
1 stop23h 05mTAP AIR PORTUGAL
mié. 10/110:20 pmIAD - OPO
1 stop13h 45mTAP AIR PORTUGAL
Deal found 7/29$482
This Delta deal was found by Cheapflights users on 7/30. 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.
mié. 10/86:15 amOPO - IAD
1 stop14h 20mDelta
mar. 10/217:59 pmIAD - OPO
2 stops14h 31mDelta
Deal found 7/30$553
This Delta deal was found by Cheapflights users on 7/30. 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.
jue. 9/46:30 amOPO - DCA
2 stops16h 44mDelta
sáb. 9/205:15 pmDCA - OPO
2 stops17h 15mDelta
Deal found 7/30$559
This KLM deal was found by Cheapflights users on 7/29. 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.
jue. 9/188:20 pmOPO - IAD
1 stop24h 15mMultiple Airlines
mié. 10/19:20 pmIAD - OPO
1 stop30h 05mMultiple Airlines
Deal found 7/29$560
This American Airlines deal was found by Cheapflights users on 7/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/188:15 amOPO - IAD
1 stop11h 45mAmerican Airlines
mié. 10/14:35 pmIAD - OPO
1 stop10h 00mAmerican Airlines
Deal found 7/29$564
This lol.travel deal was found by Cheapflights users on 7/30. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/412:35 pmOPO - DCA
1 stop14h 01mUnited Airlines
sáb. 9/203:29 pmDCA - OPO
1 stop10h 26mUnited Airlines
Deal found 7/30$566
This Booking.com deal was found by Cheapflights users on 7/29. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/246:00 amOPO - IAD
1 stop14h 50mLufthansa
sáb. 1/36:00 pmIAD - OPO
1 stop16h 05mLufthansa
Deal found 7/29$569
This United Airlines deal was found by Cheapflights users on 7/29. 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.
lun. 12/226:00 amOPO - IAD
1 stop13h 35mUnited Airlines
mar. 12/306:30 amIAD - OPO
2 stops24h 10mUnited Airlines
Deal found 7/29$570
This Delta deal was found by Cheapflights users on 7/29. 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.
jue. 9/186:30 amOPO - BWI
2 stops21h 27mDelta
mié. 10/15:15 pmBWI - OPO
2 stops17h 20mDelta
Deal found 7/29$579
This American Airlines deal was found by Cheapflights users on 7/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/188:15 amOPO - DCA
2 stops15h 45mAmerican Airlines
mié. 10/11:15 pmDCA - OPO
2 stops13h 20mAmerican Airlines
Deal found 7/29$579
This Iberia deal was found by Cheapflights users on 7/30. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/1812:20 pmOPO - DCA
2 stops15h 47mIberia
mié. 10/11:15 pmDCA - OPO
2 stops13h 20mIberia
Deal found 7/30$600

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 julio 30, 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

jue. 9/4

9:20 pm-5:40 pm

1 stop25h 20m

Baltimore/Washington

sáb. 9/20

6:50 pm-8:05 pm

1 stop20h 15m

$437

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

jue. 9/18

9:15 pm-3:20 pm

1 stop23h 05m

Washington, D.C. Dulles Intl

mié. 10/1

10:20 pm-5:05 pm

1 stop13h 45m

$482

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

mié. 10/8

6:15 am-3:35 pm

1 stop14h 20m

Washington, D.C. Dulles Intl

mar. 10/21

7:59 pm-3:30 pm

2 stops14h 31m

$553

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

jue. 9/4

6:30 am-6:14 pm

2 stops16h 44m

Washington, D.C. Reagan-National

sáb. 9/20

5:15 pm-3:30 pm

2 stops17h 15m

$559

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

jue. 9/18

8:20 pm-3:35 pm

1 stop24h 15m

Washington, D.C. Dulles Intl

mié. 10/1

9:20 pm-8:25 am

1 stop30h 05m

$560

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

jue. 9/18

8:15 am-3:00 pm

1 stop11h 45m

Washington, D.C. Dulles Intl

mié. 10/1

4:35 pm-7:35 am

1 stop10h 00m

$564

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

jue. 9/4

12:35 pm-9:36 pm

1 stop14h 01m

Washington, D.C. Reagan-National

sáb. 9/20

3:29 pm-6:55 am

1 stop10h 26m

$566

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

jue. 9/18

8:15 am-7:00 pm

2 stops15h 45m

Washington, D.C. Reagan-National

mié. 10/1

1:15 pm-7:35 am

2 stops13h 20m

$579

PortoBaltimore

OPO - BWI

OPOBWI

Porto

jue. 9/18

6:30 am-10:57 pm

2 stops21h 27m

Baltimore/Washington

mié. 10/1

5:15 pm-3:35 pm

2 stops17h 20m

$579

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

jue. 9/18

12:20 pm-11:07 pm

2 stops15h 47m

Washington, D.C. Reagan-National

mié. 10/1

1:15 pm-7:35 am

2 stops13h 20m

$600

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 54 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
No data available for this route at this time. Please check back soon.

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 julio 30, 2025.
Peruse reviews from past customers who have flown with Delta, KLM, and SWISS from Porto to Maryland to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,980 reviews

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Delta
8.0
Very good
7,980 reviews
Delta
8.0
Very good
7,980 reviews

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
KLM
7.8
Good
1,383 reviews
Delta
8.0
Very good
7,980 reviews

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
SWISS
7.5
Good
1,686 reviews
Delta
8.0
Very good
7,980 reviews

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
United Airlines
7.4
Good
8,896 reviews
Delta
8.0
Very good
7,980 reviews

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Scandinavian Airlines
7.3
Good
1,453 reviews
Delta
8.0
Very good
7,980 reviews

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.

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?

    $394 is the cheapest one-way deal found within the past few days, from WorldTicket. You may also be able to find cheap deals on Royal Air Maroc and TAP AIR PORTUGAL, with prices starting from $394 and $426, 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. Dulles Intl and Porto - Washington, D.C. Reagan-National.

  • 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.

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Alternative routes for Porto to Maryland

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