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$397+ Cheap flights from Porto (OPO) to Baltimore (BWI)

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 4/9. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — BWI
Feb 26 — Mar 51
Thu 2/26
Thu 3/5
1 adult, Economy
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Cheap flight deals from Porto to Baltimore

Cheapest flights from Porto to Baltimore
Explore the most affordable flight options available from Porto to Baltimore. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 27, 2026.

This United Airlines deal was found by Cheapflights users on 1/25. 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 3/116:00 am
OPO
-
BWI
2 stops19h 42m
United Airlines
Wed 3/185:12 pm
BWI
-
OPO
2 stops18h 13m
United Airlines
Deal found 1/25$473
This American Airlines deal was found by Cheapflights users on 1/26. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/168:20 am
OPO
-
BWI
2 stops32h 05m
American Airlines
Sun 4/199:35 pm
BWI
-
OPO
2 stops29h 05m
American Airlines
Deal found 1/26$493
This Delta deal was found by Cheapflights users on 1/27. 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 2/165:00 am
OPO
-
BWI
2 stops38h 56m
Delta
Sun 3/16:00 am
BWI
-
OPO
2 stops47h 30m
Delta
Deal found 1/27$498
This British Airways deal was found by Cheapflights users on 1/26. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/210:40 am
OPO
-
BWI
1 stop14h 00m
British Airways
Mon 5/119:30 pm
BWI
-
OPO
1 stop17h 20m
British Airways
Deal found 1/26$520
This British Airways deal was found by Cheapflights users on 1/26. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/39:25 pm
OPO
-
BWI
1 stop27h 15m
British Airways
Sun 5/109:35 pm
BWI
-
OPO
1 stop17h 45m
British Airways
Deal found 1/26$558
This British Airways deal was found by Cheapflights users on 1/26. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/219:25 pm
OPO
-
BWI
1 stop27h 15m
British Airways
Mon 8/109:30 pm
BWI
-
OPO
1 stop17h 20m
British Airways
Deal found 1/26$559
This British Airways deal was found by Cheapflights users on 1/26. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/199:10 pm
OPO
-
BWI
1 stop27h 30m
British Airways
Mon 8/109:30 pm
BWI
-
OPO
1 stop17h 20m
British Airways
Deal found 1/26$577
This British Airways deal was found by Cheapflights users on 1/26. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/219:25 pm
OPO
-
BWI
1 stop27h 15m
British Airways
Tue 8/117:25 pm
BWI
-
OPO
1 stop19h 05m
British Airways
Deal found 1/26$606
This British Airways deal was found by Cheapflights users on 1/26. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/199:10 pm
OPO
-
BWI
1 stop27h 30m
British Airways
Tue 8/117:25 pm
BWI
-
OPO
1 stop19h 05m
British Airways
Deal found 1/26$624
This Iberia deal was found by Cheapflights users on 1/26. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/238:40 pm
OPO
-
BWI
2 stops28h 00m
Iberia
Mon 8/109:30 pm
BWI
-
OPO
2 stops29h 10m
Iberia
Deal found 1/26$652

Find flight deals from Porto to Baltimore

Discover tips and strategies to find the most affordable flight options for your journey from Porto (OPO) to Baltimore (BWI). 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 January 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$473
(United Airlines)

One-way from

$397
(American Airlines)

Popular in

August

Cheapest in

June

Average price

$580
Provider with most accurate pricing for Porto-Baltimore/Washington flight deals.
Search Deals
Provider most trusted by Cheapflights users for Porto-Baltimore/Washington flights.
Search Deals
From Porto to Baltimore/Washington
Search Deals
One-way flight from Porto to Baltimore/Washington
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($22 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Porto to Baltimore 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 January 27, 2026.
Use the filters below to find and compare flights from Porto to Baltimore that are best for you.

Fly from

Porto

Fly to

Baltimore

Route

Depart

Return

Price

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Thu 4/16

8:20 am-11:25 am

2 stops32h 05m

Baltimore/Washington

Sun 4/19

9:35 pm-7:40 am

2 stops29h 05m

$493

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Thu 5/7

9:55 am-7:40 pm

1 stop14h 45m

Baltimore/Washington

Thu 5/14

9:30 pm-9:50 am

1 stop31h 20m

$520

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Wed 5/6

8:20 pm-7:40 pm

1 stop28h 20m

Baltimore/Washington

Thu 5/14

9:30 pm-8:20 pm

1 stop17h 50m

$520

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Sat 5/2

10:40 am-7:40 pm

1 stop14h 00m

Baltimore/Washington

Sat 5/9

9:30 pm-8:35 pm

1 stop18h 05m

$520

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Wed 5/6

8:20 pm-7:40 pm

1 stop28h 20m

Baltimore/Washington

Mon 5/11

9:30 pm-7:50 pm

1 stop17h 20m

$520

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Sat 5/2

10:40 am-7:40 pm

1 stop14h 00m

Baltimore/Washington

Mon 5/11

9:30 pm-7:50 pm

1 stop17h 20m

$520

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Thu 5/7

9:55 am-7:40 pm

1 stop14h 45m

Baltimore/Washington

Sun 5/10

9:35 pm-8:20 pm

1 stop17h 45m

$520

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Thu 5/7

9:55 am-7:40 pm

1 stop14h 45m

Baltimore/Washington

Wed 5/13

9:30 pm-7:05 pm

1 stop16h 35m

$558

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Tue 5/5

8:40 pm-7:40 pm

1 stop28h 00m

Baltimore/Washington

Thu 5/14

9:30 pm-8:20 pm

1 stop17h 50m

$558

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Sun 5/3

9:25 pm-7:40 pm

1 stop27h 15m

Baltimore/Washington

Thu 5/14

9:30 pm-8:20 pm

1 stop17h 50m

$558

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/24

Showing 1-10 of 18 results
1
2
  • Most accurate provider: When it comes to deals on Porto-Baltimore flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Porto-Baltimore flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Porto-Baltimore flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Porto-Baltimore flights, Cheapflights users trust FlightHub the most. FlightHub 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 Porto-Baltimore 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 Porto to Baltimore

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

Related info for your journey

Find useful and relevant information for your journey from Porto to Baltimore. 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 Porto to Baltimore?

    Departing from Porto to Baltimore will take you 14h 45m. Airlines will cover a distance of 3493 mi. This flight may include one or multiple stops.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Porto to Baltimore by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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