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$237+ 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 4/20. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — OPO
Mar 21 — Mar 281
Sat 3/21
Sat 3/28
1 adult, Economy
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Cheapflights Tip: The best prices from Boston Logan Intl to Porto are usually found in February or January, booked 18 days in advance, depart on a Tuesday or Thursday and return on a Monday

Cheap 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 February 19, 2026.

This United Airlines deal was found by Cheapflights users on 2/18. 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.
Mon 2/239:30 am
BOS
-
OPO
2 stops19h 00m
United Airlines
Fri 3/1312:45 pm
OPO
-
BOS
2 stops15h 12m
United Airlines
Deal found 2/18$367
This United Airlines deal was found by Cheapflights users on 2/16. 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.
Mon 2/237:19 pm
BOS
-
OPO
2 stops33h 11m
United Airlines
Thu 3/1212:35 pm
OPO
-
BOS
1 stop11h 40m
United Airlines
Deal found 2/16$368
This FlightHub deal was found by Cheapflights users on 2/18. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/195:50 am
BOS
-
OPO
1 stop20h 10m
Multiple Airlines
Mon 11/97:20 pm
OPO
-
BOS
1 stop30h 00m
Multiple Airlines
Deal found 2/18$370
This Gotogate deal was found by Cheapflights users on 2/15. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/255:30 am
BOS
-
OPO
2 stops24h 45m
Multiple Airlines
Wed 12/27:20 pm
OPO
-
BOS
1 stop30h 00m
Multiple Airlines
Deal found 2/15$374
This Kiwi.com deal was found by Cheapflights users on 2/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/254:45 pm
BOS
-
OPO
1 stop14h 00m
Iberia
Tue 3/38:20 am
OPO
-
BOS
1 stop11h 55m
Iberia
Deal found 2/17$375
This United Airlines deal was found by Cheapflights users on 2/18. 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 2/225:57 pm
BOS
-
OPO
1 stop10h 33m
United Airlines
Fri 3/612:45 pm
OPO
-
BOS
1 stop11h 09m
United Airlines
Deal found 2/18$376
This Kiwi.com deal was found by Cheapflights users on 2/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/249:20 pm
BOS
-
OPO
1 stop9h 25m
Iberia
Tue 3/312:25 pm
OPO
-
BOS
1 stop12h 25m
Iberia
Deal found 2/17$377
This Orbitz deal was found by Cheapflights users on 2/15. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/254:45 pm
BOS
-
OPO
1 stop14h 00m
Iberia
Thu 3/512:25 pm
OPO
-
BOS
1 stop12h 25m
Iberia
Deal found 2/15$378
This Travelocity deal was found by Cheapflights users on 2/18. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/34:45 pm
BOS
-
OPO
1 stop14h 00m
Iberia
Tue 3/178:20 am
OPO
-
BOS
1 stop11h 55m
Iberia
Deal found 2/18$379
This United Airlines deal was found by Cheapflights users on 2/17. 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.
Wed 10/1410:40 am
BOS
-
OPO
1 stop15h 20m
United Airlines
Wed 10/212:25 pm
OPO
-
BOS
2 stops24h 26m
United Airlines
Deal found 2/17$380
This United Airlines deal was found by Cheapflights users on 2/18. 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 2/252:20 pm
BOS
-
OPO
2 stops14h 10m
United Airlines
Fri 3/612:45 pm
OPO
-
BOS
1 stop11h 09m
United Airlines
Deal found 2/18$381

Find 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 February 19, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$376
(United Airlines)

One-way from

$237
(Mytrip)

Popular in

June

Cheapest in

February

Average price

$418

Good round-trip deal

$648 or less

Good one-way deal

$334 or less
Provider with most accurate pricing for Boston Logan Intl-Porto flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boston Logan Intl-Porto flights.
Search Deals
From Boston Logan Intl to Porto
Search Deals
One-way flight from Boston Logan Intl to Porto
Search Deals
Highest demand for flights based on searches. 21% potential increase in price ($166 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($20 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals
Price to beat on a round-trip flight from Boston Logan Intl to Porto.
Search Deals
Price to beat on a one-way flight from Boston Logan Intl to Porto.
Search Deals

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 February 19, 2026.
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

Mon 2/23

6:27 pm-9:30 am

1 stop10h 03m

Porto

Fri 3/13

12:45 pm-11:57 pm

2 stops15h 12m

$367

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Mon 2/23

9:30 am-9:30 am

2 stops19h 00m

Porto

Fri 3/6

12:45 pm-6:54 pm

1 stop11h 09m

$381

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Tue 2/24

2:20 pm-9:30 am

2 stops14h 10m

Porto

Wed 3/4

12:35 pm-6:41 pm

1 stop11h 06m

$381

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Tue 2/24

2:20 pm-9:30 am

2 stops14h 10m

Porto

Fri 3/6

12:45 pm-11:57 pm

2 stops16h 12m

$381

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Tue 2/24

12:35 pm-9:30 am

2 stops15h 55m

Porto

Wed 3/11

12:35 pm-8:15 pm

1 stop11h 40m

$381

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Mon 2/23

2:20 pm-9:30 am

2 stops14h 10m

Porto

Tue 3/3

12:35 pm-6:41 pm

1 stop11h 06m

$381

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Wed 2/25

9:40 am-9:30 am

2 stops18h 50m

Porto

Wed 3/4

12:35 pm-6:41 pm

1 stop11h 06m

$381

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Tue 3/3

9:40 am-9:30 am

2 stops18h 50m

Porto

Tue 3/10

12:35 pm-9:41 pm

1 stop13h 06m

$381

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Wed 2/25

2:20 pm-9:30 am

2 stops14h 10m

Porto

Thu 3/5

12:35 pm-6:41 pm

1 stop11h 06m

$381

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Wed 2/25

2:20 pm-9:30 am

2 stops14h 10m

Porto

Fri 3/6

12:45 pm-6:54 pm

1 stop11h 09m

$381

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/18

Showing 1-10 of 19 results
1
2

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 February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy2 starsTrust Score*2 stars
JustAirTicketPrice Accuracy-Trust Score*1 star
Justfly.comPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
SmartFaresPrice Accuracy1 starTrust 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Boston-Porto flight deals on Cheapflights vs. FlightHub >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 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 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 February 18, 2026.

To ensure you get the cheapest price possible for a flight from Boston to Porto, you should look to book at least 18 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 $354). Flying from Boston to Porto in June is currently the most expensive (average of $555). 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.

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 February 19, 2026.
Read through reviews of airlines operating flights from Boston to Porto, such as Delta, United Airlines, and Air Canada. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,215 reviews

Overall

7.9

Boarding

8.1

Comfort

7.9

Entertainment

7.8

Crew

8.5

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,215 reviews
Delta
7.9
Good
8,215 reviews

Overall

7.9

Boarding

8.1

Comfort

7.9

Entertainment

7.8

Crew

8.5

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,325 reviews
Delta
7.9
Good
8,215 reviews

Overall

7.9

Boarding

8.1

Comfort

7.9

Entertainment

7.8

Crew

8.5

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Air Canada
7.1
Good
10,732 reviews
Delta
7.9
Good
8,215 reviews

Overall

7.9

Boarding

8.1

Comfort

7.9

Entertainment

7.8

Crew

8.5

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
TAP AIR PORTUGAL
7.1
Good
2,145 reviews
Delta
7.9
Good
8,215 reviews

Overall

7.9

Boarding

8.1

Comfort

7.9

Entertainment

7.8

Crew

8.5

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Iberia
7.0
Good
3,118 reviews
Delta
7.9
Good
8,215 reviews

Overall

7.9

Boarding

8.1

Comfort

7.9

Entertainment

7.8

Crew

8.5

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

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 25 times in the past calendar month.

  • How long is the flight from Boston to Porto?

    United Airlines can get you from Boston to Porto in just under 10h 03m. Your travel time can differ by up to . The distance from Boston to Porto is about 3134 mi.

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

    According to our current data, SWISS ($338), Iberia ($373), and British Airways ($374) offers the cheapest pricing from Boston to Porto. These flights start at 45% lower than the current average price 3 months from now.

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

    One-way options have recently been found by users for as low as $158 on United Airlines. Other airlines that offer cheap prices include Lufthansa from $176 and Delta from $236 one-way.

  • What are the cheapest flights from Boston to Porto?

    Looking at all options, your cheapest flight can be booked for $297. While the most popular route (Boston Logan Intl - Porto) can be booked for $364 on average, our data indicates $637 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 $18 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 $23 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, January is the cheapest month in which you can book a flight from Boston to Porto (average of $354). Flying from Boston to Porto in June is currently the most expensive (average of $555). 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
Vila Nova de Gaia
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 February 19, 2026.
AirlineCheapestAverageFlexibilityOn-time
SWISSCheapest$338Average$609FlexibilityNo cancel feeOn-time79%
IberiaCheapest$373Average$549FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$374Average$644FlexibilityNo cancel feeOn-time70%
KLMCheapest$394Average$633FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$395Average$751FlexibilityNo cancel feeOn-time71%
DeltaCheapest$396Average$830FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$396Average$674FlexibilityNo cancel feeOn-time69%
TAP AIR PORTUGALCheapest$410Average$756FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$411Average$622FlexibilityNo cancel feeOn-time76%
Air CanadaCheapest$434Average$659FlexibilityNo cancel feeOn-time67%

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