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$252+ Cheap flights from Baltimore (BWI) 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 1/18. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — OPO
Dec 20 — Dec 271
Sat 12/20
Sat 12/27
1 adult, Economy
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Cheap flight deals from Baltimore to Porto

Discover tips and strategies to find the most affordable flight options for your journey from Baltimore (BWI) to Porto (OPO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated November 20, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$484
(United Airlines)

One-way from

$252
(Kiwi.com)

Popular in

August

Cheapest in

November

Average price

$529
Provider with most accurate pricing for Baltimore/Washington-Porto flight deals.
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Provider most trusted by Cheapflights users for Baltimore/Washington-Porto flights.
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From Baltimore/Washington to Porto
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One-way flight from Baltimore/Washington to Porto
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Highest demand for flights based on searches. 24% potential increase in price ($268 potential increase over avg. RT price).
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Cheapest flight prices on average. 8% potential price decrease ($65 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Find flight deals from Baltimore to Porto

Cheapest flights from Baltimore to Porto
Explore the most affordable flight options available from Baltimore to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 20, 2025.

This KLM deal was found by Cheapflights users on 11/18. 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.
Sat 12/65:31 pmBWI - OPO
2 stops16h 54mKLM
Mon 12/156:30 amOPO - BWI
2 stops17h 32mKLM
Deal found 11/18$598
This United Airlines deal was found by Cheapflights users on 11/18. 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 12/21:10 pmBWI - OPO
2 stops17h 30mUnited Airlines
Wed 12/106:00 amOPO - BWI
2 stops20h 08mUnited Airlines
Deal found 11/18$603
This British Airways deal was found by Cheapflights users on 11/20. 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.
Thu 12/118:35 pmBWI - OPO
1 stop15h 40mBritish Airways
Wed 12/176:35 pmOPO - BWI
1 stop29h 10mBritish Airways
Deal found 11/20$655
This American Airlines deal was found by Cheapflights users on 11/18. 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.
Sat 12/611:35 amBWI - OPO
2 stops19h 10mAmerican Airlines
Tue 12/168:20 amOPO - BWI
2 stops18h 48mAmerican Airlines
Deal found 11/18$671
This Delta deal was found by Cheapflights users on 11/18. 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 12/65:31 pmBWI - OPO
2 stops16h 54mDelta
Mon 12/156:30 amOPO - BWI
2 stops17h 32mDelta
Deal found 11/18$673
This British Airways deal was found by Cheapflights users on 11/20. 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 12/108:35 pmBWI - OPO
1 stop15h 10mBritish Airways
Wed 12/176:35 pmOPO - BWI
1 stop29h 10mBritish Airways
Deal found 11/20$680
This United Airlines deal was found by Cheapflights users on 11/18. 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 11/2610:56 amBWI - OPO
2 stops17h 34mUnited Airlines
Tue 12/212:30 pmOPO - BWI
2 stops33h 55mUnited Airlines
Deal found 11/18$688
This British Airways deal was found by Cheapflights users on 11/20. 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.
Thu 12/118:35 pmBWI - OPO
1 stop15h 40mBritish Airways
Mon 12/225:30 pmOPO - BWI
1 stop30h 15mBritish Airways
Deal found 11/20$690
This British Airways deal was found by Cheapflights users on 11/20. 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 12/108:35 pmBWI - OPO
1 stop15h 10mBritish Airways
Mon 12/225:30 pmOPO - BWI
1 stop30h 15mBritish Airways
Deal found 11/20$715
This Ovago deal was found by Cheapflights users on 11/18. 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.
Sat 12/68:35 pmBWI - OPO
1 stop17h 40mMultiple Airlines
Tue 12/168:40 pmOPO - BWI
2 stops27h 05mMultiple Airlines
Deal found 11/18$719
This British Airways deal was found by Cheapflights users on 11/18. 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.
Sat 12/68:35 pmBWI - OPO
1 stop17h 40mBritish Airways
Tue 12/166:25 pmOPO - BWI
1 stop29h 20mBritish Airways
Deal found 11/18$730
This Ovago deal was found by Cheapflights users on 11/18. 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 11/268:35 pmBWI - OPO
1 stop15h 10mBritish Airways
Tue 12/26:25 pmOPO - BWI
1 stop29h 20mBritish Airways
Deal found 11/18$733

Cheapflights Fare Finder

 
Customize your flight search to find flights from Baltimore 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 November 20, 2025.
Use the filters below to find and compare flights from Baltimore to Porto that are best for you.

Fly from

Baltimore

Fly to

Porto

Route

Depart

Return

Price

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Wed 1/14

12:00 pm-10:30 am

2 stops17h 30m

Porto

Thu 1/22

11:15 am-12:45 am

2 stops18h 30m

$492

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Wed 1/14

10:05 am-11:40 am

2 stops20h 35m

Porto

Mon 1/19

6:00 am-9:21 pm

2 stops44h 21m

$522

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Tue 2/10

8:35 pm-5:35 pm

1 stop16h 00m

Porto

Thu 2/19

4:55 pm-6:45 pm

1 stop30h 50m

$530

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Wed 2/11

8:35 pm-4:05 pm

1 stop14h 30m

Porto

Wed 2/18

6:30 pm-6:45 pm

1 stop29h 15m

$530

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Wed 1/14

10:54 am-10:30 am

2 stops18h 36m

Porto

Mon 1/19

11:15 am-12:41 am

2 stops18h 26m

$542

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Fri 2/13

8:35 pm-7:00 pm

1 stop17h 25m

Porto

Thu 2/19

4:55 pm-6:45 pm

1 stop30h 50m

$580

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Wed 2/11

8:35 pm-4:05 pm

1 stop14h 30m

Porto

Fri 2/20

6:05 pm-6:45 pm

1 stop29h 40m

$580

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Tue 2/10

8:35 pm-5:35 pm

1 stop16h 00m

Porto

Fri 2/20

6:05 pm-6:45 pm

1 stop29h 40m

$580

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Sun 2/15

8:35 pm-4:40 pm

1 stop15h 05m

Porto

Sat 2/21

7:50 pm-6:45 pm

1 stop27h 55m

$580

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Tue 2/10

8:35 pm-5:35 pm

1 stop16h 00m

Porto

Sat 2/21

7:50 pm-6:45 pm

1 stop27h 55m

$580

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/20

Showing 1-10 of 18 results
1
2

Compare providers for flights from Baltimore to Porto

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Baltimore to Porto in November.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
CheapOairPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Baltimore-Porto flights, users find the pricing of CheapOair to be most consistent on Cheapflights vs. CheapOair Users can find the same prices on Baltimore-Porto flight deals on Cheapflights vs. CheapOair >95% of the time. Price accuracy is based on data collected from Baltimore-Porto flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Baltimore-Porto flights, Cheapflights users trust CheapOair the most. CheapOair has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Baltimore-Porto flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Baltimore to Porto

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

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

Currently, December is the cheapest month in which you can book a flight from Baltimore to Porto (average of $417). Flying from Baltimore to Porto in May is currently the most expensive (average of $688). 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 BWI to OPO?

Find hourly flight availability from Baltimore 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 November 20, 2025.

Unlike in the evening, when flights are generally more expensive, you can save up to 44% on flights from Baltimore to Porto by exploring options for tickets at noon.

How much does it cost to fly round-trip from Baltimore 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 November 20, 2025.
Peruse reviews from past customers who have flown with Delta from Baltimore to Porto to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,002 reviews

Entertainment

7.9

Boarding

8.1

Comfort

7.9

Crew

8.5

Overall

7.9

Food

7.3

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,002 reviews
Delta
7.9
Good
8,002 reviews

Entertainment

7.9

Boarding

8.1

Comfort

7.9

Crew

8.5

Overall

7.9

Food

7.3

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from Baltimore to Porto. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Baltimore to Porto?

    Departing from Baltimore to Porto will take you 16h. There are 3493 mi between Baltimore and Porto. Both multi-stop and nonstop flights can be found to your destination and back.

  • What is the cheapest airline to fly from Baltimore to Porto round-trip?

    According to our current data, Delta ($529), offers the cheapest pricing from Baltimore to Porto. Delta is 36% cheaper than the average price of flights available within the next 90 days to this destination.

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

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

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

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

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

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

    Currently, December is the cheapest month in which you can book a flight from Baltimore to Porto (average of $417). Flying from Baltimore to Porto in May is currently the most expensive (average of $688). 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 Porto?

Book flights to Porto if you plan to visit one of these locations
Aveiro
Arcos de Valdevez
Coimbra
Vila Nova de Gaia

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Top airline flying from Baltimore to Porto

Discover the top airline that operate flights from Baltimore 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 November 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$529Average$782FlexibilityNo cancel feeOn-timeN/A

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