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$254+ Cheap flights from Maryland to Porto (OPO)

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 8/11. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — OPO
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
1 adult, Economy
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Cheap flight deals from Maryland to Porto

Keep the following information in mind while searching for Maryland to Porto flight deals. Data was last updated July 3, 2025.

Round-trip from

$615
(United Airlines)

One-way from

$254
(Mytrip)

Popular in

June

Cheapest in

November

Average price

$847
From Maryland to Porto
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One-way flight from Maryland to Porto
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Highest demand for flights based on searches. 20% potential increase in price ($178 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($19 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 Maryland to Porto

Cheapest flights from Maryland to Porto
Explore the most affordable flight options available from Maryland to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.

This Ovago deal was found by Cheapflights users on 6/30. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/58:30 pmBWI - OPO
1 stop14h 35mBritish Airways
Mon 11/105:30 pmOPO - BWI
1 stop30h 15mBritish Airways
Deal found 6/30$570
This United Airlines deal was found by Cheapflights users on 7/1. 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.
Tue 10/1410:51 amBWI - OPO
2 stops19h 24mUnited Airlines
Tue 10/2112:05 pmOPO - BWI
2 stops34h 21mUnited Airlines
Deal found 7/1$587
This KLM deal was found by Cheapflights users on 7/2. 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.
Tue 10/146:10 pmBWI - OPO
2 stops16h 20mKLM
Wed 10/226:15 amOPO - BWI
2 stops20h 28mKLM
Deal found 7/2$597
This Delta deal was found by Cheapflights users on 7/1. 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 10/221:00 pmBWI - OPO
2 stops16h 40mDelta
Fri 10/3111:45 amOPO - BWI
2 stops15h 11mDelta
Deal found 7/1$604
This Booking.com deal was found by Cheapflights users on 6/30. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/276:50 pmBWI - OPO
1 stop20h 15mPLAY
Thu 10/29:20 pmOPO - BWI
1 stop25h 20mPLAY
Deal found 6/30$622
This CrystalTravel deal was found by Cheapflights users on 7/2. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/215:35 pmPHL - OPO
1 stop12h 40mLufthansa
Thu 9/46:00 amOPO - PHL
1 stop15h 00mLufthansa
Deal found 7/2$627
This Gotogate deal was found by Cheapflights users on 7/3. 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.
Mon 11/33:30 pmPHL - OPO
2 stops16h 20mMultiple Airlines
Sat 11/156:00 amOPO - PHL
2 stops21h 56mMultiple Airlines
Deal found 7/3$634
This Booking.com deal was found by Cheapflights users on 7/3. 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 9/178:45 pmIAD - OPO
1 stop30h 10mMultiple Airlines
Tue 9/306:15 amOPO - IAD
2 stops14h 35mMultiple Airlines
Deal found 7/3$635
This United Airlines deal was found by Cheapflights users on 7/1. 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 8/211:03 pmPHL - OPO
2 stops15h 42mUnited Airlines
Thu 9/412:10 pmOPO - PHL
2 stops28h 46mUnited Airlines
Deal found 7/1$636
This Air Canada deal was found by Cheapflights users on 7/3. 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.
Sat 9/203:25 pmPHL - OPO
1 stop13h 10mAir Canada
Mon 9/296:00 amOPO - PHL
2 stops20h 38mAir Canada
Deal found 7/3$638
This Lufthansa deal was found by Cheapflights users on 7/1. 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.
Sat 8/3010:20 pmIAD - OPO
1 stop20h 00mLufthansa
Tue 11/256:00 amOPO - IAD
1 stop14h 50mLufthansa
Deal found 7/1$639
This United Airlines deal was found by Cheapflights users on 7/1. 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 8/215:53 pmIAD - OPO
1 stop10h 52mUnited Airlines
Wed 8/276:00 amOPO - IAD
1 stop14h 50mUnited Airlines
Deal found 7/1$640

Cheapflights Fare Finder

Customize your flight search to find flights from Maryland to Porto 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 July 3, 2025.
Use the filters below to find and compare flights from Maryland to Porto that are best for you.

Fly from

Maryland

Fly to

Porto

Route

Depart

Return

Price

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Wed 11/5

8:30 pm-4:05 pm

1 stop14h 35m

Porto

Mon 11/10

5:30 pm-6:45 pm

1 stop30h 15m

$570

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Tue 10/14

10:51 am-11:15 am

2 stops19h 24m

Porto

Tue 10/21

12:05 pm-5:26 pm

2 stops34h 21m

$587

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Tue 10/14

6:10 pm-3:30 pm

2 stops16h 20m

Porto

Wed 10/22

6:15 am-9:43 pm

2 stops20h 28m

$597

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Wed 10/22

1:00 pm-10:40 am

2 stops16h 40m

Porto

Fri 10/31

11:45 am-10:56 pm

2 stops15h 11m

$604

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Sat 9/27

6:50 pm-8:05 pm

1 stop20h 15m

Porto

Thu 10/2

9:20 pm-5:40 pm

1 stop25h 20m

$622

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Thu 8/21

5:35 pm-11:15 am

1 stop12h 40m

Porto

Thu 9/4

6:00 am-4:00 pm

1 stop15h 00m

$627

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Mon 11/3

3:30 pm-12:50 pm

2 stops16h 20m

Porto

Sat 11/15

6:00 am-10:56 pm

2 stops21h 56m

$634

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Wed 9/17

8:45 pm-7:55 am

1 stop30h 10m

Porto

Tue 9/30

6:15 am-3:50 pm

2 stops14h 35m

$635

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Thu 8/21

1:03 pm-9:45 am

2 stops15h 42m

Porto

Thu 9/4

12:10 pm-11:56 am

2 stops28h 46m

$636

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Sat 9/20

3:25 pm-9:35 am

1 stop13h 10m

Porto

Mon 9/29

6:00 am-9:38 pm

2 stops20h 38m

$638

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

Showing 1-10 of 60 results
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6

Best time to book a flight from Maryland to Porto

Have a flexible travel schedule? Discover the best time to fly to Porto from Maryland 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 Maryland to Porto

What is the cheapest month to book a flight from Maryland to Porto?

Currently, January is the cheapest month in which you can book a flight from Maryland to Porto (average of $523). Flying from Maryland to Porto in June is currently the most expensive (average of $1,033). 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.

What is the cheapest time of day to fly from MD to OPO?

Find hourly flight availability from Maryland to Porto. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 3, 2025.

When flying from Maryland to Porto, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

How much does it cost to fly round-trip from Maryland to Porto?

Reviews of airlines servicing Porto

Get insights into the airlines that provide service to Porto. 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 Porto. Reviews last updated July 3, 2025.
See what other customers who have flown with Delta, KLM, and Air France from Maryland to Porto have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,982 reviews

Overall

8.0

Food

7.3

Comfort

7.9

Boarding

8.2

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
7,982 reviews
Delta
8.0
Very good
7,982 reviews

Overall

8.0

Food

7.3

Comfort

7.9

Boarding

8.2

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
1,367 reviews
Delta
8.0
Very good
7,982 reviews

Overall

8.0

Food

7.3

Comfort

7.9

Boarding

8.2

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!
Air France
7.5
Good
1,465 reviews
Delta
8.0
Very good
7,982 reviews

Overall

8.0

Food

7.3

Comfort

7.9

Boarding

8.2

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
1,654 reviews
Delta
8.0
Very good
7,982 reviews

Overall

8.0

Food

7.3

Comfort

7.9

Boarding

8.2

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
8,861 reviews
Delta
8.0
Very good
7,982 reviews

Overall

8.0

Food

7.3

Comfort

7.9

Boarding

8.2

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 Maryland to Porto. 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 into for flights to Porto from Maryland?

    If you book a flight to Porto from Maryland, you will be flying to Porto, which is the city’s only airport. Porto (OPO) is located 6.8 mi from the center of Porto.

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

    $254 is the cheapest one-way deal found within the past few days, from TAP AIR PORTUGAL. You may also be able to find cheap deals on PLAY and Air Canada, with prices starting from $353 and $354, respectively.

  • What are the most popular routes from Maryland to Porto?

    When deciding which route to take from Maryland to Porto consider Washington, D.C. Dulles Intl - Porto, Washington, D.C. Reagan-National - Porto or Baltimore/Washington - Porto as they are the most popular.

  • Can I find deals for flights from Maryland to Porto that include hotel bookings?

    Yes. In addition to deals on Maryland to Porto flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Maryland to Porto?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Maryland to Porto.

  • Can I find deals for business class flights from Maryland to Porto?

    Yes. Cheapflights offers flight deals from Maryland to Porto 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 Maryland to Porto?

    Currently, January is the cheapest month in which you can book a flight from Maryland to Porto (average of $523). Flying from Maryland to Porto in June is currently the most expensive (average of $1,033). 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

Traveling to a place near Maryland?

Book flights to Maryland if you plan to visit one of these locations
Aveiro
Coimbra
Matosinhos

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Alternative routes for Maryland to Porto

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Maryland to Porto

Discover the top 2 airlines that operate flights from Maryland to Porto. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$434Average$701FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$451Average$716FlexibilityNo cancel feeOn-time75%

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