Porto

$273+ 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 9/26. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — OPO
Jul 8 — Jul 151
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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 July 3, 2025.

Round-trip from

$615
(United Airlines)

One-way from

$273
(Kiwi.com)

Popular in

August

Cheapest in

January

Average price

$779
From Baltimore/Washington to Porto
One-way flight from Baltimore/Washington to Porto
Highest demand for flights based on searches. 21% potential increase in price ($205 potential increase over avg. RT price).
Cheapest flight prices on average. 5% potential price decrease ($40 potential savings vs. average RT price).
Average for round-trip flights in July 2025

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 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 Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/158:30 pmBWI - OPO
2 stops21h 05mMultiple Airlines
Wed 10/226:30 pmOPO - BWI
2 stops28h 10mMultiple Airlines
Deal found 7/2$658

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 July 3, 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 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

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Wed 10/15

8:30 pm-10:35 pm

2 stops21h 05m

Porto

Wed 10/22

6:30 pm-5:40 pm

2 stops28h 10m

$658

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Fri 10/10

9:20 pm-7:35 am

2 stops29h 15m

Porto

Sat 10/25

8:35 pm-7:45 pm

2 stops28h 10m

$821

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Fri 9/26

11:54 am-1:05 pm

3 stops44h 11m

$273

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Fri 8/22

6:50 pm-8:05 pm

1 stop20h 15m

$353

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Tue 9/9

10:51 am-7:45 am

2 stops15h 54m

$359

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

Showing 1-10 of 14 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 $1,033). 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 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 July 3, 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.

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 July 3, 2025.
Peruse reviews from past customers who have flown with Delta, KLM, and United Airlines 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.
8.0
Very good

Crew

8.5

Food

7.3

Entertainment

7.9

Comfort

7.9

Boarding

8.2

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!
8.0
Very good
8.0
Very good

Crew

8.5

Food

7.3

Entertainment

7.9

Comfort

7.9

Boarding

8.2

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!
8.0
Very good

Crew

8.5

Food

7.3

Entertainment

7.9

Comfort

7.9

Boarding

8.2

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!
8.0
Very good

Crew

8.5

Food

7.3

Entertainment

7.9

Comfort

7.9

Boarding

8.2

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!
8.0
Very good

Crew

8.5

Food

7.3

Entertainment

7.9

Comfort

7.9

Boarding

8.2

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!
8.0
Very good

Crew

8.5

Food

7.3

Entertainment

7.9

Comfort

7.9

Boarding

8.2

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 Baltimore to Porto. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • What are the cheapest airlines flying from Baltimore to Porto round-trip?

    According to our current data, United Airlines ($615), PLAY ($622), and Delta ($646) offers the cheapest pricing from Baltimore to Porto. United Airlines is 16% cheaper than the average price of flights available within the next 90 days to this destination.

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

    $353 is the cheapest one-way deal found within the past few days, from PLAY. You may also be able to find cheap deals on United Airlines and Delta, with prices starting from $359 and $378, respectively.

  • 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 $1,033). 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 Baltimore?

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

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Top 2 airlines flying from Baltimore to Porto

Discover the top 2 airlines 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 July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$434Average$701FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$451Average$716FlexibilityNo cancel feeOn-time75%

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