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$250+ Cheap flights from Boston (BOS) 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 9/29. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — OPO
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
1 adult, Economy
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Cheapflights Tip: The best prices from Boston Logan Intl to Porto are usually found in January or November, booked 42 days in advance, depart on a Tuesday or Friday and return on a Monday

Cheap flight deals from Boston to Porto

Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) 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 August 14, 2025.

Round-trip from

$430
(Iberia)

One-way from

$250
(Cheapflightsfares)

Popular in

June

Cheapest in

January

Average price

$735

Good round-trip deal

$511 or less

Good one-way deal

$259 or less
From Boston Logan Intl to Porto
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One-way flight from Boston Logan Intl to Porto
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Highest demand for flights based on searches. 15% potential increase in price ($120 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Price to beat on a round-trip flight from Boston Logan Intl to Porto.
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Price to beat on a one-way flight from Boston Logan Intl to Porto.
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Find flight deals from Boston to Porto

Cheapest flights from Boston to Porto
Explore the most affordable flight options available from Boston to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2025.

This Iberia deal was found by Cheapflights users on 8/14. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/244:30 pmBOS - OPO
1 stop14h 10mIberia
Tue 9/98:35 pmOPO - BOS
2 stops27h 14mIberia
Deal found 8/14$430
This Gotogate deal was found by Cheapflights users on 8/14. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2912:15 pmBOS - OPO
2 stops16h 20mMultiple Airlines
Mon 10/208:05 pmOPO - BOS
2 stops24h 20mMultiple Airlines
Deal found 8/14$431
This Gotogate deal was found by Cheapflights users on 8/14. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/2610:45 pmBOS - OPO
1 stop16h 40mTAP AIR PORTUGAL
Mon 10/206:05 pmOPO - BOS
Nonstop7h 40mTAP AIR PORTUGAL
Deal found 8/14$432
This oojo deal was found by Cheapflights users on 8/12. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/2711:15 pmBOS - OPO
Nonstop6h 40mTAP AIR PORTUGAL
Mon 10/275:55 pmOPO - BOS
1 stop25h 40mTAP AIR PORTUGAL
Deal found 8/12$433
This Iberia deal was found by Cheapflights users on 8/12. 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.
Mon 8/259:04 amBOS - OPO
2 stops25h 51mIberia
Thu 9/258:15 amOPO - BOS
2 stops15h 34mIberia
Deal found 8/12$434
This oojo deal was found by Cheapflights users on 8/14. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/811:15 pmBOS - OPO
Nonstop6h 40mTAP AIR PORTUGAL
Mon 10/139:15 pmOPO - BOS
1 stop22h 05mTAP AIR PORTUGAL
Deal found 8/14$435
This Kiwi.com deal was found by Cheapflights users on 8/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/265:05 pmBOS - OPO
1 stop13h 25mSWISS
Tue 9/98:40 amOPO - BOS
1 stop11h 45mSWISS
Deal found 8/13$436
This Ovago deal was found by Cheapflights users on 8/13. 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.
Sun 10/59:20 pmBOS - OPO
1 stop9h 20mBritish Airways
Thu 10/168:15 amOPO - BOS
2 stops19h 04mBritish Airways
Deal found 8/13$437
This KAYAK deal was found by Cheapflights users on 8/13. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/279:50 pmBOS - OPO
1 stop32h 20mSWISS
Mon 12/157:20 pmOPO - BOS
1 stop30h 00mSWISS
Deal found 8/13$438
This United Airlines deal was found by Cheapflights users on 8/14. 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.
Tue 8/264:23 pmBOS - OPO
1 stop10h 22mUnited Airlines
Thu 9/2512:10 pmOPO - BOS
1 stop10h 45mUnited Airlines
Deal found 8/14$439
This Iberia deal was found by Cheapflights users on 8/12. 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.
Sun 8/249:20 pmBOS - OPO
1 stop9h 20mIberia
Wed 9/178:35 pmOPO - BOS
2 stops27h 14mIberia
Deal found 8/12$440
This SWISS deal was found by Cheapflights users on 8/12. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/149:40 pmBOS - OPO
2 stops16h 25mSWISS
Mon 10/207:20 pmOPO - BOS
1 stop29h 35mSWISS
Deal found 8/12$441

Cheapflights Fare Finder

 
Customize your flight search to find flights from Boston 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 August 14, 2025.
Use the filters below to find and compare flights from Boston to Porto that are best for you.

Fly from

Boston

Fly to

Porto

Route

Depart

Return

Price

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 8/24

4:30 pm-3:55 pm

1 stop18h 25m

Porto

Wed 9/17

8:35 pm-3:00 pm

1 stop23h 25m

$430

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 8/24

4:30 pm-3:55 pm

1 stop18h 25m

Porto

Tue 9/23

4:35 pm-3:00 pm

1 stop27h 25m

$430

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 8/31

6:10 pm-10:55 am

1 stop11h 45m

Porto

Sat 9/13

5:40 pm-8:20 pm

Nonstop7h 40m

$433

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sat 9/27

11:15 pm-10:55 am

Nonstop6h 40m

Porto

Mon 10/27

5:55 pm-3:35 pm

1 stop25h 40m

$433

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 8/24

5:40 pm-7:55 pm

2 stops21h 15m

Porto

Tue 9/9

8:35 pm-10:50 pm

2 stops31h 15m

$434

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 8/24

5:40 pm-7:55 pm

2 stops21h 15m

Porto

Mon 9/22

4:35 pm-7:50 pm

1 stop32h 15m

$434

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Mon 8/25

12:54 pm-3:55 pm

2 stops22h 01m

Porto

Mon 9/22

4:35 pm-7:50 pm

1 stop32h 15m

$434

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Wed 10/15

1:01 pm-7:35 am

2 stops13h 34m

Porto

Mon 10/20

8:15 am-3:00 pm

1 stop11h 45m

$434

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 8/24

5:40 pm-3:55 pm

2 stops17h 15m

Porto

Thu 9/25

8:15 am-6:49 pm

2 stops15h 34m

$434

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Mon 8/25

12:54 pm-3:55 pm

2 stops22h 01m

Porto

Thu 9/18

8:35 pm-6:49 pm

2 stops27h 14m

$434

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/13

Showing 1-10 of 18 results
1
2

Best time to book a flight from Boston to Porto

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

How far ahead should I book a flight from Boston to Porto?

Use this chart to determine the optimal time to book a round-trip flight from Boston to Porto. Price data was last updated on August 8, 2025.

To ensure you get the cheapest price possible for a flight from Boston to Porto, you should look to book at least 42 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, January is the cheapest month in which you can book a flight from Boston to Porto (average of $523). Flying from Boston to Porto in June is currently the most expensive (average of $1,029). 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 BOS to OPO?

Find hourly flight availability from Boston 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 August 14, 2025.

It’s optimal to fly from Boston to Porto in the morning. By choosing this option you can save up to 27% on the cost of your flight, compared to a flight in the evening.

How much does it cost to fly round-trip from Boston to Porto?

What’s the top layover airport for flights from Boston to Porto?

Share of 1-stop round-trip flights from Boston to Porto chosen by Cheapflights users in the past 12 months, using the same layover each way.

Madrid (MAD) – chosen by Cheapflights users on 50% of 1-stop itineraries from Boston to Porto on Cheapflights.

What’s the cheapest layover airport for flights from Boston to Porto?

Average round-trip fare for 1-stop flights from Boston to Porto, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Madrid (MAD) is the most affordable 1-stop option, with an average round-trip price of $596.

What’s the fastest layover option from Boston to Porto?

Shortest average travel time for 1-stop one-way flights from Boston to Porto, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Madrid (MAD) have the shortest average one-way travel time for 1-stop routes: 10h 05m.

Which airport typically offers the quickest layover for flights from Boston to Porto?

Average layover duration for 1-stop one-way flights from Boston to Porto, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Frankfurt am Main (FRA) offer the fastest connection on this route, with an average layover time of 2h 03m.

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 August 14, 2025.
Read through reviews of airlines operating flights from Boston to Porto, such as Delta, Azores Airlines, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

Boarding

8.2

Food

7.3

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
7,980 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

Boarding

8.2

Food

7.3

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!
Azores Airlines
7.5
Good
69 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

Boarding

8.2

Food

7.3

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!
United Airlines
7.4
Good
8,916 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

Boarding

8.2

Food

7.3

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!
TAP AIR PORTUGAL
7.1
Good
1,948 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

Boarding

8.2

Food

7.3

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!
Iberia
7.0
Good
2,878 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

Boarding

8.2

Food

7.3

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 Boston to Porto. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How popular is this Boston to Porto flight route?

    Flights from Boston Logan Intl to Porto have been viewed 23 times in the past calendar month.

  • What are the cheapest airlines flying from Boston to Porto round-trip?

    According to our current data, Azores Airlines ($302), SWISS ($338), and Iberia ($389) offers the cheapest pricing from Boston to Porto. These flights start at 53% lower than the current average price 3 months from now.

  • What are the cheapest flights from Boston to Porto?

    Looking at all options, your cheapest flight can be booked for $241. While the most popular route (Boston Logan Intl - Porto) can be booked for $340 on average our data indicates $1,167 when flying from Boston to Porto.

  • Where are the most common layover locations when flying from Boston to Porto?

    Flights departing from Boston and landing in Porto layover in Lisbon most frequently. Madrid is the second most popular location for layovers on flights from Boston to Porto. Ponta Delgada sees the third most layovers on flights from Boston to Porto.

  • What are some popular things to do or see while on a layover in Lisbon?

    The majority of Lisbon visitors spend their time at Chiado, Praça do Marquês de Pombal, and Londres. Travelers on a layover in Lisbon can visit Chiado, Praça do Marquês de Pombal, and Londres, by traveling 4.5 mi, 3.6 mi, and 2.3 mi, respectively after landing at Lisbon Humberto Delgado. Travelers in need of a car in Lisbon can rent one for about $32 per day.

  • What are some popular points of interest to see during a layover in Madrid?

    Puerta del Sol, Plaza Mayor, and Spain Building are the most popular attractions in Madrid if you're in need of something to do during your layover. Puerta del Sol, Plaza Mayor, and Spain Building can be accessed by traveling approximately 8.4 mi, 8.6 mi, and 8.5 mi, respectively from Madrid Barajas. Those looking to explore during their layover in Madrid can rent a car from Madrid Barajas for about $30 per day.

  • Where are the least popular layover locations for Boston to Porto flights?

    Flights departing from Boston and landing in Porto layover in Paris least frequently. Amsterdam follows Paris in terms of the least common layover location on Boston to Porto flights.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from Boston to Porto (average of $523). Flying from Boston to Porto in June is currently the most expensive (average of $1,029). 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

Browse thousands of different options on Cheapflights for your next trip

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Top 10 airlines flying from Boston to Porto

Discover the top 10 airlines that operate flights from Boston 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 August 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
Azores AirlinesCheapest$302Average$587FlexibilityNo cancel feeOn-time74%
SWISSCheapest$338Average$615FlexibilityNo cancel feeOn-time79%
IberiaCheapest$389Average$620FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$441Average$652FlexibilityNo cancel feeOn-time70%
KLMCheapest$467Average$613FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$474Average$722FlexibilityNo cancel feeOn-time69%
TAP AIR PORTUGALCheapest$503Average$758FlexibilityNo cancel feeOn-timeN/A
DeltaCheapest$505Average$770FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$515Average$681FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$522Average$752FlexibilityNo cancel feeOn-time71%

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