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$339+ 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 12/18. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — BWI
Nov 30 — Dec 71
Sun 11/30
Sun 12/7
1 adult, Economy
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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 October 31, 2025.

This Rumbo deal was found by Cheapflights users on 10/29. 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 Rumbo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/215:35 pmOPO - IAD
1 stop30h 15mScandinavian Airlines
Thu 12/48:30 pmIAD - OPO
1 stop15h 25mScandinavian Airlines
Deal found 10/29$519
This Kiwi.com deal was found by Cheapflights users on 10/31. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/206:00 amOPO - IAD
1 stop14h 50mLufthansa
Thu 12/46:00 pmIAD - OPO
1 stop12h 40mLufthansa
Deal found 10/31$545
This Gotogate deal was found by Cheapflights users on 10/31. 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 11/206:00 amOPO - DCA
2 stops18h 45mAir Canada
Thu 12/46:00 amDCA - OPO
2 stops24h 10mAir Canada
Deal found 10/31$559
This Air Canada deal was found by Cheapflights users on 10/31. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/206:00 amOPO - IAD
2 stops20h 20mAir Canada
Thu 12/41:20 pmIAD - OPO
2 stops16h 50mAir Canada
Deal found 10/31$565
This Mytrip deal was found by Cheapflights users on 10/31. 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 11/206:00 amOPO - IAD
2 stops38h 46mMultiple Airlines
Thu 12/48:30 pmIAD - OPO
1 stop17h 00mMultiple Airlines
Deal found 10/31$567
This Delta deal was found by Cheapflights users on 10/31. 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 11/226:00 amOPO - IAD
1 stop15h 05mDelta
Sun 4/56:30 pmIAD - OPO
1 stop16h 00mDelta
Deal found 10/31$569
This KLM deal was found by Cheapflights users on 10/29. 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.
Mon 11/246:30 amOPO - IAD
1 stop14h 35mKLM
Mon 12/16:50 pmIAD - OPO
1 stop10h 40mKLM
Deal found 10/29$572
This Delta deal was found by Cheapflights users on 10/29. 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.
Mon 11/246:30 amOPO - IAD
1 stop14h 35mDelta
Mon 12/16:50 pmIAD - OPO
1 stop10h 40mDelta
Deal found 10/29$573
This Delta deal was found by Cheapflights users on 10/30. 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.
Fri 11/216:30 amOPO - DCA
2 stops21h 26mDelta
Thu 12/411:13 amDCA - OPO
2 stops18h 12mDelta
Deal found 10/30$577
This Delta deal was found by Cheapflights users on 10/29. 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.
Mon 11/246:30 amOPO - DCA
2 stops21h 26mDelta
Mon 12/111:10 amDCA - OPO
2 stops18h 20mDelta
Deal found 10/29$578
This Delta deal was found by Cheapflights users on 10/30. 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.
Fri 11/216:30 amOPO - IAD
1 stop14h 35mDelta
Thu 12/412:19 pmIAD - OPO
2 stops17h 11mDelta
Deal found 10/30$581
This Air France deal was found by Cheapflights users on 10/29. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/246:30 amOPO - DCA
2 stops15h 30mMultiple Airlines
Mon 12/12:59 pmDCA - OPO
2 stops14h 31mMultiple Airlines
Deal found 10/29$587

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 October 31, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$519
(Rumbo)

One-way from

$339
(Cheapflightsfares)

Popular in

September

Cheapest in

May

Average price

$684
Provider with most accurate pricing for Porto-Washington, D.C. (WAS) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Porto-Washington, D.C. (WAS) flights.
Search Deals
From Porto to Maryland
Search Deals
One-way flight from Porto to Maryland
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($44 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

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 October 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

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 11/20

6:00 am-3:50 pm

1 stop14h 50m

Washington, D.C. Dulles Intl

Thu 12/4

6:00 pm-11:40 am

1 stop12h 40m

$545

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 11/20

6:00 am-9:20 pm

2 stops20h 20m

Washington, D.C. Dulles Intl

Thu 12/4

1:20 pm-11:10 am

2 stops16h 50m

$565

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 11/20

6:00 am-3:46 pm

2 stops38h 46m

Washington, D.C. Dulles Intl

Thu 12/4

8:30 pm-6:30 pm

1 stop17h 00m

$567

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Sat 11/22

6:00 am-8:26 pm

2 stops43h 26m

Washington, D.C. Dulles Intl

Sun 4/5

9:15 am-6:30 pm

2 stops28h 15m

$567

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Sat 11/22

6:00 am-4:05 pm

1 stop15h 05m

Washington, D.C. Dulles Intl

Sun 4/5

6:30 pm-3:30 pm

1 stop16h 00m

$569

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Sat 11/22

6:00 am-4:05 pm

1 stop15h 05m

Washington, D.C. Dulles Intl

Sun 4/5

9:20 pm-3:30 pm

1 stop13h 10m

$572

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 11/24

6:30 am-4:05 pm

1 stop14h 35m

Washington, D.C. Dulles Intl

Mon 12/1

6:50 pm-10:30 am

1 stop10h 40m

$572

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 11/24

6:30 am-4:05 pm

1 stop14h 35m

Washington, D.C. Dulles Intl

Mon 12/1

6:50 pm-10:30 am

1 stop10h 40m

$573

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Fri 11/21

6:30 am-10:56 pm

2 stops21h 26m

Washington, D.C. Reagan-National

Thu 12/4

11:13 am-10:25 am

2 stops18h 12m

$577

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Mon 11/24

6:30 am-10:56 pm

2 stops21h 26m

Washington, D.C. Reagan-National

Mon 12/1

11:10 am-10:30 am

2 stops18h 20m

$578

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

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
No data available for this route at this time. Please check back soon.

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.

  • How long is the flight from Porto to Maryland?

    Airlines like Lufthansa, Air Canada, and Delta fly from Porto to Maryland in about 14h 50m. The time it takes to get you to your destination can typically vary by up to 5h 30m. Porto and Maryland are separated by a distance of 3537 mi. This flight may include one or multiple stops.

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

    $339 is the cheapest one-way deal found within the past few days, from Iberia. You may also be able to find cheap deals on American Airlines and British Airways, with prices starting from $353 and $379, 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.

See more FAQs

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