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$259+ 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 8/3. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — OPO
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$638
(Air Canada)

One-way from

$259
(Cheapflightsfares)

Popular in

June

Cheapest in

November

Average price

$879
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 ($175 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 June 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 June 12, 2025.

This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1910:56 amBWI - OPO
2 stops19h 44mUnited Airlines
Wed 11/266:00 amOPO - BWI
2 stops32h 59mUnited Airlines
Deal found 6/10$515
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/28:30 pmBWI - OPO
2 stops30h 10mBritish Airways
Fri 11/78:40 pmOPO - BWI
2 stops51h 05mBritish Airways
Deal found 6/12$578
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.
Tue 10/281:35 pmPHL - OPO
2 stops18h 10mAmerican Airlines
Wed 11/58:40 pmOPO - PHL
1 stop23h 55mAmerican Airlines
Deal found 6/12$607
This Gotogate 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/209:20 amPHL - OPO
1 stop19h 15mMultiple Airlines
Tue 10/76:00 amOPO - PHL
1 stop15h 00mMultiple Airlines
Deal found 6/10$609
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/286:35 pmPHL - OPO
1 stop13h 05mLufthansa
Wed 11/54:15 pmOPO - PHL
1 stop28h 45mLufthansa
Deal found 6/12$618
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/145:30 pmBWI - OPO
2 stops17h 00mDelta
Thu 10/2311:35 amOPO - BWI
2 stops17h 37mDelta
Deal found 6/11$625
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/163:20 pmPHL - OPO
1 stop13h 15mUnited Airlines
Thu 8/2812:10 pmOPO - PHL
2 stops34h 11mUnited Airlines
Deal found 6/12$627
This Gotogate 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/188:15 amPHL - OPO
2 stops20h 20mAir Canada
Tue 8/2612:50 pmOPO - PHL
2 stops30h 16mAir Canada
Deal found 6/12$645
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/296:50 pmBWI - OPO
1 stop20h 15mPLAY
Thu 9/119:20 pmOPO - BWI
1 stop25h 20mPLAY
Deal found 6/10$652
This Iberia 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/11:35 pmPHL - OPO
2 stops14h 05mIberia
Tue 11/118:20 amOPO - PHL
2 stops17h 00mIberia
Deal found 6/10$657
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.
Mon 9/2210:40 pmIAD - OPO
2 stops27h 55mIberia
Mon 9/294:35 pmOPO - IAD
1 stop27h 25mIberia
Deal found 6/12$667
This British Airways 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/57:45 pmPHL - OPO
1 stop15h 20mBritish Airways
Sun 11/98:20 amOPO - PHL
1 stop12h 15mBritish Airways
Deal found 6/12$667

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 June 12, 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 11/19

10:56 am-11:40 am

2 stops19h 44m

Porto

Wed 11/26

6:00 am-9:59 am

2 stops32h 59m

$515

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Sun 11/2

8:30 pm-7:40 am

2 stops30h 10m

Porto

Fri 11/7

8:40 pm-6:45 pm

2 stops51h 05m

$578

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Tue 10/28

1:35 pm-11:45 am

2 stops18h 10m

Porto

Wed 11/5

8:40 pm-3:35 pm

1 stop23h 55m

$607

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Sat 9/20

9:20 am-9:35 am

1 stop19h 15m

Porto

Tue 10/7

6:00 am-4:00 pm

1 stop15h 00m

$609

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Tue 10/28

6:35 pm-11:40 am

1 stop13h 05m

Porto

Wed 11/5

4:15 pm-4:00 pm

1 stop28h 45m

$618

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Tue 10/14

5:30 pm-3:30 pm

2 stops17h 00m

Porto

Thu 10/23

11:35 am-12:12 am

2 stops17h 37m

$625

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Sat 8/16

3:20 pm-9:35 am

1 stop13h 15m

Porto

Thu 8/28

12:10 pm-5:21 pm

2 stops34h 11m

$627

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Sat 9/20

3:25 pm-9:35 am

1 stop13h 10m

Porto

Tue 10/7

6:00 am-2:38 pm

2 stops37h 38m

$636

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Fri 8/29

6:50 pm-8:05 pm

1 stop20h 15m

Porto

Thu 9/11

9:20 pm-5:40 pm

1 stop25h 20m

$652

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Sat 11/1

1:35 pm-7:40 am

2 stops14h 05m

Porto

Tue 11/11

8:20 am-8:20 pm

2 stops17h 00m

$657

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 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 $1,047). 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 June 12, 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.

Rainfall in Porto by month

Plan your trip to Porto by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Porto ranges from 0.7 - 7.7 inches per month. December is typically the wettest month, when rainfall can reach 7.7 in. July is typically the driest time to visit Porto when rainfall is around 0.7 in.

Temperature in Porto by month

Plan your trip to Porto by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Porto, 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 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 48.2 F).

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 June 12, 2025.
Read through reviews of airlines operating flights from Maryland to Porto, such as Delta, Porter Airlines and KLM. Users have also rated airlines 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

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

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

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

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!
Porter Airlines
8.0
Very good
288 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

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

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

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
1,463 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

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

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

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?

    $259 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 Scandinavian Airlines, with prices starting from $327 and $430, 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 $1,047). 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
Arcos de Valdevez

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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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$434Average$717FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$451Average$707FlexibilityNo cancel feeOn-time75%

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