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$233+ 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 12/4. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — OPO
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Find cheap flights from Boston 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”

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Cheapflights Tip: The best prices from Boston Logan Intl to Porto are usually found in March or January, 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 October 30, 2025.

Most accurate provider

Gotogate
3 stars

Most trusted provider

Gotogate
3 stars

Round-trip from

$402
(Air Canada)

One-way from

$233
(Kiwi.com)

Popular in

June

Cheapest in

March

Average price

$576

Good round-trip deal

$620 or less

Good one-way deal

$180 or less
Provider with most accurate pricing for Boston Logan Intl-Porto flight deals.
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Provider most trusted by Cheapflights users for Boston Logan Intl-Porto flights.
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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 ($118 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 October 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 October 30, 2025.

This United deal was found by Cheapflights users on 10/29. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/911:59 amBOS - OPO
1 stop16h 31mMultiple Airlines
Tue 11/259:10 amOPO - BOS
2 stops16h 10mMultiple Airlines
Deal found 10/29$402
This Trip.com deal was found by Cheapflights users on 10/30. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/2910:25 pmBOS - OPO
1 stop18h 35mTAP AIR PORTUGAL
Fri 12/59:00 amOPO - BOS
1 stop16h 10mTAP AIR PORTUGAL
Deal found 10/30$403
This oojo deal was found by Cheapflights users on 10/30. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/2910:25 pmBOS - OPO
1 stop13h 35mTAP AIR PORTUGAL
Sat 12/61:00 pmOPO - BOS
1 stop12h 10mTAP AIR PORTUGAL
Deal found 10/30$404
This Delta deal was found by Cheapflights users on 10/28. 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 12/39:59 amBOS - OPO
2 stops19h 31mDelta
Tue 12/911:25 amOPO - BOS
2 stops25h 08mDelta
Deal found 10/28$408
This United Airlines deal was found by Cheapflights users on 10/29. 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.
Sun 11/239:30 amBOS - OPO
2 stops19h 00mUnited Airlines
Mon 12/112:30 pmOPO - BOS
1 stop29h 55mUnited Airlines
Deal found 10/29$409
This Mytrip deal was found by Cheapflights users on 10/29. 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.
Sat 12/65:30 amBOS - OPO
2 stops24h 45mMultiple Airlines
Tue 1/2012:05 pmOPO - BOS
1 stop13h 15mMultiple Airlines
Deal found 10/29$410
This CrystalTravel deal was found by Cheapflights users on 10/29. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/288:40 pmBOS - OPO
1 stop11h 10mMultiple Airlines
Thu 12/1112:05 pmOPO - BOS
1 stop12h 55mMultiple Airlines
Deal found 10/29$416
This CrystalTravel deal was found by Cheapflights users on 10/29. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/288:40 pmBOS - OPO
1 stop22h 00mMultiple Airlines
Fri 12/512:50 pmOPO - BOS
1 stop12h 10mMultiple Airlines
Deal found 10/29$418
This oojo deal was found by Cheapflights users on 10/29. 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.
Thu 11/2710:45 pmBOS - OPO
1 stop13h 15mTAP AIR PORTUGAL
Thu 12/46:00 pmOPO - BOS
1 stop25h 35mTAP AIR PORTUGAL
Deal found 10/29$419
This oojo deal was found by Cheapflights users on 10/30. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/610:25 pmBOS - OPO
1 stop11h 35mTAP AIR PORTUGAL
Wed 12/178:00 pmOPO - BOS
1 stop29h 10mTAP AIR PORTUGAL
Deal found 10/30$424
This Mytrip deal was found by Cheapflights users on 10/29. 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.
Sat 12/610:10 pmBOS - OPO
1 stop15h 25mSWISS
Tue 1/2012:05 pmOPO - BOS
1 stop13h 15mSWISS
Deal found 10/29$425
This American Airlines deal was found by Cheapflights users on 10/29. 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.
Fri 11/2811:56 amBOS - OPO
2 stops14h 44mAmerican Airlines
Fri 12/512:25 pmOPO - BOS
1 stop12h 25mAmerican Airlines
Deal found 10/29$429

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 October 30, 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

Wed 12/3

9:59 am-10:30 am

2 stops19h 31m

Porto

Tue 12/9

11:25 am-7:33 am

2 stops25h 08m

$408

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 11/23

9:30 am-9:30 am

2 stops19h 00m

Porto

Mon 12/1

12:30 pm-1:25 pm

1 stop29h 55m

$409

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Mon 11/10

9:59 am-10:30 am

2 stops19h 31m

Porto

Wed 11/19

6:00 am-6:55 pm

2 stops17h 55m

$409

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Thu 11/27

9:40 am-9:30 am

2 stops18h 50m

Porto

Thu 12/4

12:05 pm-8:00 pm

1 stop12h 55m

$423

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Wed 11/26

4:29 pm-3:25 pm

2 stops17h 56m

Porto

Tue 12/2

12:55 pm-2:52 pm

2 stops30h 57m

$435

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Thu 11/27

2:21 pm-9:30 am

2 stops14h 09m

Porto

Thu 12/4

6:00 am-11:41 pm

2 stops22h 41m

$444

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Tue 11/25

7:50 am-11:40 am

2 stops22h 50m

Porto

Mon 12/1

12:30 pm-1:25 pm

1 stop29h 55m

$444

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sat 11/29

8:25 pm-10:30 am

1 stop33h 05m

Porto

Tue 12/9

11:15 am-1:20 pm

1 stop31h 05m

$446

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Wed 11/26

4:29 pm-3:25 pm

2 stops17h 56m

Porto

Mon 12/1

12:30 pm-2:05 pm

2 stops30h 35m

$448

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Thu 11/27

6:30 pm-10:25 am

1 stop10h 55m

Porto

Thu 12/4

11:20 am-10:26 pm

2 stops16h 06m

$453

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 21 results
1
2
3

Compare providers for flights from Boston 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 Boston to Porto in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
JustAirTicketPrice Accuracy-Trust Score*1 star
GotogatePrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star

*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 Boston-Porto flights, users find the pricing of Gotogate to be most consistent on Cheapflights vs. Gotogate Users can find the same prices on Boston-Porto flight deals on Cheapflights vs. Gotogate >95% of the time. Price accuracy is based on data collected from Boston-Porto flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Boston-Porto flights, Cheapflights users trust Gotogate the most. Gotogate 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 Boston-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 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 October 24, 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, October is the cheapest month in which you can book a flight from Boston to Porto (average of $372). Flying from Boston to Porto in June is currently the most expensive (average of $565). 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 October 30, 2025.

It’s optimal to fly from Boston to Porto in the morning. By choosing this option you can save up to 48% 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?

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 October 30, 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
7.9
Good
7,998 reviews

Boarding

8.2

Crew

8.5

Overall

7.9

Food

7.3

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
7.9
Good
7,998 reviews
Delta
7.9
Good
7,998 reviews

Boarding

8.2

Crew

8.5

Overall

7.9

Food

7.3

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Azores Airlines
7.4
Good
82 reviews
Delta
7.9
Good
7,998 reviews

Boarding

8.2

Crew

8.5

Overall

7.9

Food

7.3

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
United Airlines
7.4
Good
8,996 reviews
Delta
7.9
Good
7,998 reviews

Boarding

8.2

Crew

8.5

Overall

7.9

Food

7.3

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
TAP AIR PORTUGAL
7.1
Good
2,040 reviews
Delta
7.9
Good
7,998 reviews

Boarding

8.2

Crew

8.5

Overall

7.9

Food

7.3

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Iberia
7.0
Good
3,004 reviews
Delta
7.9
Good
7,998 reviews

Boarding

8.2

Crew

8.5

Overall

7.9

Food

7.3

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

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.

  • How long is the flight from Boston to Porto?

    Delta and United Airlines can get you from Boston to Porto in just under 19h. Your travel time can differ by up to 31m. The distance from Boston to Porto is about 3134 mi. This flight may include one or multiple stops.

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

    According to our current data, SWISS ($338), Iberia ($374), and British Airways ($374) offers the cheapest pricing from Boston to Porto. These flights start at 48% 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 $138. While the most popular route (Boston Logan Intl - Porto) can be booked for $339 on average, our data indicates $481 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.

  • 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 $20 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 $29 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. Ponta Delgada 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, October is the cheapest month in which you can book a flight from Boston to Porto (average of $372). Flying from Boston to Porto in June is currently the most expensive (average of $565). 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 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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
SWISSCheapest$338Average$612FlexibilityNo cancel feeOn-time79%
IberiaCheapest$374Average$586FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$374Average$645FlexibilityNo cancel feeOn-time70%
KLMCheapest$394Average$634FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$434Average$701FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$450Average$711FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$457Average$632FlexibilityNo cancel feeOn-time76%
Azores AirlinesCheapest$461Average$604FlexibilityNo cancel feeOn-time74%
American AirlinesCheapest$466Average$751FlexibilityNo cancel feeOn-time71%
TAP AIR PORTUGALCheapest$491Average$753FlexibilityNo cancel feeOn-timeN/A

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