HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Porto

$400+ 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 12/15. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — OPO
Dec 26 — Jan 21
Fri 12/26
Fri 1/2
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Baltimore to Porto with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 26, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$451
(American Airlines)

One-way from

$400
(Kiwi.com)

Popular in

August

Cheapest in

November

Average price

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

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 26, 2025.

This Delta deal was found by Cheapflights users on 11/25. 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 12/21:52 pmBWI - OPO
2 stops15h 38mDelta
Thu 12/1111:20 amOPO - BWI
2 stops16h 43mDelta
Deal found 11/25$490
This American Airlines deal was found by Cheapflights users on 11/25. 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.
Sun 12/712:29 pmBWI - OPO
2 stops14h 11mAmerican Airlines
Sat 1/318:20 amOPO - BWI
2 stops20h 26mAmerican Airlines
Deal found 11/25$634
This Delta deal was found by Cheapflights users on 11/24. 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 12/21:52 pmBWI - OPO
2 stops15h 38mDelta
Wed 12/106:00 amOPO - BWI
2 stops18h 02mDelta
Deal found 11/24$641
This Delta deal was found by Cheapflights users on 11/24. 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 12/102:41 pmBWI - OPO
2 stops14h 49mDelta
Sun 2/85:00 amOPO - BWI
2 stops21h 09mDelta
Deal found 11/24$692
This Delta deal was found by Cheapflights users on 11/26. 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 12/51:52 pmBWI - OPO
2 stops15h 58mDelta
Wed 12/107:35 amOPO - BWI
2 stops21h 47mDelta
Deal found 11/26$709
This Ovago deal was found by Cheapflights users on 11/24. 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 12/138:35 pmBWI - OPO
1 stop17h 40mBritish Airways
Mon 2/28:40 pmOPO - BWI
2 stops27h 05mBritish Airways
Deal found 11/24$724
This British Airways deal was found by Cheapflights users on 11/24. 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 10mMultiple Airlines
Sat 1/318:20 amOPO - BWI
2 stops17h 58mMultiple Airlines
Deal found 11/24$731
This Ovago deal was found by Cheapflights users on 11/24. 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 12/108:35 pmBWI - OPO
1 stop15h 10mBritish Airways
Sun 2/88:20 amOPO - BWI
2 stops15h 25mBritish Airways
Deal found 11/24$752
This United Airlines deal was found by Cheapflights users on 11/25. 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 11/266:15 amBWI - OPO
2 stops22h 15mUnited Airlines
Wed 12/36:00 amOPO - BWI
3 stops20h 08mUnited Airlines
Deal found 11/25$788
This United Airlines deal was found by Cheapflights users on 11/25. 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 11/2710:56 amBWI - OPO
2 stops17h 34mUnited Airlines
Tue 12/96:00 amOPO - BWI
2 stops20h 08mUnited Airlines
Deal found 11/25$838

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 26, 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 1/7

8:35 pm-4:45 pm

1 stop15h 10m

Porto

Mon 1/12

5:30 pm-6:45 pm

1 stop30h 15m

$479

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Wed 1/7

8:35 pm-4:45 pm

1 stop15h 10m

Porto

Thu 1/15

5:35 pm-6:45 pm

1 stop30h 10m

$479

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Tue 12/2

1:52 pm-10:30 am

2 stops15h 38m

Porto

Thu 12/11

11:20 am-11:03 pm

2 stops16h 43m

$490

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Sun 1/18

1:02 pm-10:30 am

2 stops16h 28m

Porto

Tue 2/3

6:05 am-7:07 pm

2 stops18h 02m

$492

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Wed 1/14

5:25 pm-3:25 pm

2 stops17h 00m

Porto

Thu 1/22

6:35 am-10:02 pm

2 stops20h 27m

$497

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Mon 2/23

3:37 pm-10:30 am

2 stops13h 53m

Porto

Tue 3/3

11:25 am-10:55 pm

2 stops16h 30m

$498

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Tue 2/24

10:30 am-9:30 am

2 stops18h 00m

Porto

Tue 3/3

12:35 pm-2:06 pm

2 stops30h 31m

$509

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Fri 2/6

11:45 am-10:30 am

2 stops17h 45m

Porto

Tue 2/10

11:15 am-7:07 pm

2 stops36h 52m

$528

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Sun 2/8

8:35 pm-4:40 pm

1 stop15h 05m

Porto

Tue 2/17

5:30 pm-6:45 pm

1 stop30h 15m

$529

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Wed 2/4

8:35 pm-4:05 pm

1 stop14h 30m

Porto

Wed 2/18

6:30 pm-6:45 pm

1 stop29h 15m

$529

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/24

Showing 1-10 of 16 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 $401). 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 26, 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.

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 26, 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
7,998 reviews

Comfort

7.9

Food

7.3

Entertainment

7.9

Overall

7.9

Boarding

8.1

Crew

8.5

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
7,998 reviews
Delta
7.9
Good
7,998 reviews

Comfort

7.9

Food

7.3

Entertainment

7.9

Overall

7.9

Boarding

8.1

Crew

8.5

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 15h 10m. 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 $401). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Baltimore to Porto

See prices for flight routes from nearby airports that may be better suited for you.
Dulles Intl to Lisbon flights
Reagan-National to Lisbon flights
Baltimore to Lisbon flights
Philadelphia to Lisbon flights
Dulles Intl to Porto flights
Reagan-National to Porto flights
Dulles Intl to Funchal flights
Dulles Intl to Ponta Delgada flights
Philadelphia to Porto flights
Reagan-National to Funchal flights
Reagan-National to Ponta Delgada flights
Baltimore to Ponta Delgada flights
Dulles Intl to Faro flights
Philadelphia to Funchal flights
Reagan-National to Faro flights
Baltimore to Funchal flights
Baltimore to Faro flights
Philadelphia to Ponta Delgada flights
Philadelphia to Faro flights
Dulles Intl to Lajes flights
Philadelphia to Lajes flights
Dulles Intl to Porto Santo flights
Dulles Intl to Pico Island flights
Baltimore to Lajes flights
Dulles Intl to Horta flights
Philadelphia to Horta flights
Philadelphia to Pico Island flights

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 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$529Average$701FlexibilityNo cancel feeOn-timeN/A

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.