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$230+ 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 10/11. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — OPO
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
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 September 17, 2025.

Round-trip from

$478
(Delta)

One-way from

$230
(Kiwi.com)

Popular in

August

Cheapest in

November

Average price

$972
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. 25% potential increase in price ($280 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 September 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 September 17, 2025.

This Delta deal was found by Cheapflights users on 9/16. 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 11/37:45 pmBWI - OPO
2 stops14h 40mDelta
Tue 11/1111:10 amOPO - BWI
2 stops16h 50mDelta
Deal found 9/16$491
This Delta deal was found by Cheapflights users on 9/16. 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.
Thu 10/231:00 pmBWI - OPO
2 stops14h 25mDelta
Tue 11/411:25 amOPO - BWI
2 stops16h 37mDelta
Deal found 9/16$528
This Delta deal was found by Cheapflights users on 9/15. 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.
Thu 11/2711:47 amBWI - OPO
2 stops17h 38mDelta
Wed 12/36:00 amOPO - BWI
2 stops21h 09mDelta
Deal found 9/15$529
This United Airlines deal was found by Cheapflights users on 9/16. 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 11/1310:56 amBWI - OPO
2 stops17h 34mUnited Airlines
Tue 12/26:00 amOPO - BWI
2 stops36h 50mUnited Airlines
Deal found 9/16$530
This Air France deal was found by Cheapflights users on 9/16. 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.
Wed 11/57:45 pmBWI - OPO
2 stops14h 40mMultiple Airlines
Mon 11/1011:25 amOPO - BWI
2 stops16h 35mMultiple Airlines
Deal found 9/16$541
This United Airlines deal was found by Cheapflights users on 9/14. 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.
Fri 11/1410:56 amBWI - OPO
2 stops17h 34mMultiple Airlines
Thu 11/274:15 pmOPO - BWI
2 stops29h 59mMultiple Airlines
Deal found 9/14$545
This British Airways deal was found by Cheapflights users on 9/14. 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 11/138:35 pmBWI - OPO
1 stop15h 40mBritish Airways
Tue 12/25:30 pmOPO - BWI
1 stop30h 15mBritish Airways
Deal found 9/14$547
This CheapOair deal was found by Cheapflights users on 9/15. 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.
Sat 10/46:50 pmBWI - OPO
1 stop20h 15mPLAY
Thu 10/169:20 pmOPO - BWI
1 stop25h 20mPLAY
Deal found 9/15$564
This United Airlines deal was found by Cheapflights users on 9/16. 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.
Fri 11/146:15 amBWI - OPO
2 stops22h 15mUnited Airlines
Sat 11/226:00 amOPO - BWI
3 stops20h 25mUnited Airlines
Deal found 9/16$565
This Delta deal was found by Cheapflights users on 9/16. 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 11/1412:16 pmBWI - OPO
2 stops17h 14mDelta
Sat 11/226:00 amOPO - BWI
2 stops22h 00mDelta
Deal found 9/16$579
This United Airlines deal was found by Cheapflights users on 9/17. 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 11/2510:56 amBWI - OPO
2 stops17h 34mUnited Airlines
Tue 12/26:00 amOPO - BWI
2 stops40h 25mUnited Airlines
Deal found 9/17$581

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 September 17, 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

Mon 11/3

7:45 pm-3:25 pm

2 stops14h 40m

Porto

Tue 11/11

11:10 am-11:00 pm

2 stops16h 50m

$491

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Thu 10/23

5:39 pm-3:30 pm

2 stops16h 51m

Porto

Tue 11/4

11:10 am-11:02 pm

2 stops16h 52m

$528

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Thu 11/27

11:47 am-10:25 am

2 stops17h 38m

Porto

Wed 12/3

6:00 am-10:09 pm

2 stops21h 09m

$529

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Fri 11/14

10:56 am-9:30 am

2 stops17h 34m

Porto

Thu 11/27

4:15 pm-5:14 pm

2 stops29h 59m

$545

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Thu 11/13

8:35 pm-5:15 pm

1 stop15h 40m

Porto

Tue 12/2

5:30 pm-6:45 pm

1 stop30h 15m

$547

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Fri 11/14

6:15 am-9:30 am

2 stops22h 15m

Porto

Sat 11/22

6:00 am-9:25 pm

3 stops20h 25m

$565

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Fri 11/14

12:16 pm-10:30 am

2 stops17h 14m

Porto

Sat 11/22

6:00 am-11:00 pm

2 stops22h 00m

$579

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Tue 11/25

10:56 am-9:30 am

2 stops17h 34m

Porto

Tue 12/2

6:00 am-5:25 pm

2 stops40h 25m

$581

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Sat 10/11

9:00 pm-11:20 am

2 stops57h 20m

$230

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Fri 10/10

5:01 pm-9:00 pm

3 stops22h 59m

$280

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 16 results
1
2

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, January is the cheapest month in which you can book a flight from Baltimore to Porto (average of $523). Flying from Baltimore to Porto in June is currently the most expensive (average of $1,028). 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 September 17, 2025.

Unlike in the evening, when flights are generally more expensive, you can save up to 45% 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 September 17, 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
8.0
Very good
7,961 reviews

Overall

8.0

Boarding

8.2

Crew

8.5

Comfort

7.9

Food

7.3

Entertainment

7.9

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
7,961 reviews
Delta
8.0
Very good
7,961 reviews

Overall

8.0

Boarding

8.2

Crew

8.5

Comfort

7.9

Food

7.3

Entertainment

7.9

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 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 14h 40m. There are 3493 mi between Baltimore and Porto.

  • 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 37% 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, January is the cheapest month in which you can book a flight from Baltimore to Porto (average of $523). Flying from Baltimore to Porto in June is currently the most expensive (average of $1,028). 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

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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 September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$529Average$701FlexibilityNo cancel feeOn-timeN/A

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