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$222+ 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 1/8. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — OPO
Aug 31 — Sep 71
Mon 8/31
Mon 9/7
1 adult, Economy
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Find cheap flights from Boston to Porto with Cheapflights

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Cheapflights Tip: The best prices from Boston Logan Intl to Porto are usually found in February or January, booked 85 days in advance, depart on a Tuesday or Friday and return on a Tuesday

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 August 1, 2026.

This FlightHub deal was found by Cheapflights users on 7/31. 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.
Fri 9/2510:45 pm
BOS
-
OPO
1 stop13h 05m
TAP AIR PORTUGAL
Thu 10/112:35 pm
OPO
-
BOS
1 stop12h 45m
TAP AIR PORTUGAL
Deal found 7/31$643
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/266:00 pm
BOS
-
OPO
1 stop11h 00m
TAP AIR PORTUGAL
Mon 11/302:30 pm
OPO
-
BOS
1 stop10h 25m
TAP AIR PORTUGAL
Deal found 7/30$644
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/39:15 pm
BOS
-
OPO
1 stop9h 25m
Multiple Airlines
Tue 10/2010:00 pm
OPO
-
BOS
1 stop28h 05m
Multiple Airlines
Deal found 7/29$645
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/2311:35 pm
BOS
-
OPO
1 stop11h 35m
Multiple Airlines
Sun 9/274:55 pm
OPO
-
BOS
2 stops31h 55m
Multiple Airlines
Deal found 7/29$646
This Kiwi.com deal was found by Cheapflights users on 7/31. 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.
Sun 8/2311:35 pm
BOS
-
OPO
1 stop11h 35m
Multiple Airlines
Sun 10/47:05 am
OPO
-
BOS
2 stops17h 40m
Multiple Airlines
Deal found 7/31$647
This oojo deal was found by Cheapflights users on 7/31. 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.
Sun 8/2311:00 pm
BOS
-
OPO
Nonstop6h 30m
TAP AIR PORTUGAL
Sun 10/410:30 pm
OPO
-
BOS
1 stop21h 15m
TAP AIR PORTUGAL
Deal found 7/31$648
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/39:15 pm
BOS
-
OPO
1 stop9h 25m
Multiple Airlines
Thu 10/227:15 am
OPO
-
BOS
1 stop18h 50m
Multiple Airlines
Deal found 7/29$649
This oojo deal was found by Cheapflights users on 7/30. 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.
Tue 9/2210:45 pm
BOS
-
OPO
1 stop13h 25m
TAP AIR PORTUGAL
Sun 10/119:00 am
OPO
-
BOS
1 stop10h 40m
TAP AIR PORTUGAL
Deal found 7/30$650
This oojo deal was found by Cheapflights users on 7/30. 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.
Sun 10/410:40 pm
BOS
-
OPO
1 stop11h 20m
TAP AIR PORTUGAL
Sat 10/179:15 pm
OPO
-
BOS
1 stop22h 25m
TAP AIR PORTUGAL
Deal found 7/30$652
This Gotogate deal was found by Cheapflights users on 8/1. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/2611:15 pm
BOS
-
OPO
Nonstop6h 40m
TAP AIR PORTUGAL
Mon 10/55:50 pm
OPO
-
BOS
Nonstop7h 30m
TAP AIR PORTUGAL
Deal found 8/1$653
This oojo deal was found by Cheapflights users on 7/29. 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.
Mon 9/711:15 pm
BOS
-
OPO
Nonstop6h 40m
TAP AIR PORTUGAL
Wed 10/75:05 am
OPO
-
BOS
1 stop20h 15m
TAP AIR PORTUGAL
Deal found 7/29$654

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 August 1, 2026.

Most accurate provider

Ovago
3 stars

Most trusted provider

Ovago
3 stars

Round-trip from

$643
(FlightHub)

One-way from

$222
(Mytrip)

Popular in

July

Cheapest in

February

Average price

$774

Good round-trip deal

$703 or less

Good one-way deal

$470 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. 24% potential increase in price ($206 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($24 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 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 August 1, 2026.
Use the filters below to find and compare flights from Boston to Porto that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Thu 12/10

7:10 am-9:30 am

2 stops21h 20m

Porto

Wed 12/16

12:35 pm-10:19 am

2 stops26h 44m

$709
Quickest round-trip

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Fri 11/20

10:10 pm-1:30 pm

1 stop10h 20m

Porto

Sat 12/5

2:30 pm-7:55 pm

1 stop10h 25m

$783

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Thu 10/29

10:50 pm-9:50 am

2 stops31h 00m

Porto

Mon 11/16

9:10 am-8:20 pm

2 stops40h 10m

$793

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Mon 12/7

4:30 pm-9:30 am

1 stop12h 00m

Porto

Fri 12/11

12:35 pm-11:17 pm

1 stop15h 42m

$820

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Wed 8/12

10:55 pm-8:00 am

1 stop28h 05m

Porto

Wed 8/19

10:00 pm-9:45 pm

1 stop28h 45m

$851

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Wed 8/12

6:00 am-9:45 am

1 stop22h 45m

Porto

Sun 8/23

12:15 pm-9:45 am

1 stop26h 30m

$955

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Wed 8/19

7:30 am-9:45 am

1 stop21h 15m

Porto

Sun 8/23

12:15 pm-2:41 pm

1 stop31h 26m

$960

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Thu 9/17

7:30 am-6:55 am

1 stop18h 25m

Porto

Tue 9/29

12:15 pm-6:07 pm

1 stop10h 52m

$967

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 10/4

8:05 pm-3:40 pm

2 stops14h 35m

Porto

Tue 10/13

12:15 pm-10:45 pm

2 stops15h 30m

$968

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 8/16

8:05 pm-8:35 pm

1 stop19h 30m

Porto

Thu 8/20

9:55 am-11:55 pm

2 stops19h 00m

$1,017

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/31

Showing 1-10 of 20 resultsSorted by cheapest first
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 August.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star
CheapflightsfaresPrice Accuracy2 starsTrust Score*1 star
Super.comPrice Accuracy-Trust Score*3 stars
Justfly.comPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy2 starsTrust Score*3 stars
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 Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on Boston-Porto flight deals on Cheapflights vs. Ovago >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 Ovago the most. Ovago 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?

To ensure you get the cheapest price possible for a flight from Boston to Porto, you should look to book at least 84 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, February is the cheapest month in which you can book a flight from Boston to Porto (average of $402). Flying from Boston to Porto in July is currently the most expensive (average of $919). 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 1, 2026.

When flying from Boston to Porto, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

Airfare is below average for this route at the moment.

Boston to Porto flights typically cost between $645 and $961 in September.
The cheapest round-trip price found within the last 5 days was $643 on TAP AIR PORTUGAL (Sep 25-Sep 30).

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 1, 2026.
Read through reviews of airlines operating flights from Boston to Porto, such as United Airlines,Azores Airlines, andTAP AIR PORTUGAL. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
10,062 reviews

Food

6.7

Overall

7.4

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Crew

8.1

Reviews

1 / 20
6.0
Good

Dawn,Jul 2026

ORD - GRR

The crew aboard the plane were not very friendly. They definitely acted like it was a chore to be there.
United Airlines
7.4
Good
10,062 reviews
United Airlines
7.4
Good
10,062 reviews

Food

6.7

Overall

7.4

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Crew

8.1

Reviews

1 / 20
6.0
Good

Dawn,Jul 2026

ORD - GRR

The crew aboard the plane were not very friendly. They definitely acted like it was a chore to be there.
Azores Airlines
7.2
Good
107 reviews
United Airlines
7.4
Good
10,062 reviews

Food

6.7

Overall

7.4

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Crew

8.1

Reviews

1 / 20
6.0
Good

Dawn,Jul 2026

ORD - GRR

The crew aboard the plane were not very friendly. They definitely acted like it was a chore to be there.
TAP AIR PORTUGAL
7.2
Good
2,353 reviews
United Airlines
7.4
Good
10,062 reviews

Food

6.7

Overall

7.4

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Crew

8.1

Reviews

1 / 20
6.0
Good

Dawn,Jul 2026

ORD - GRR

The crew aboard the plane were not very friendly. They definitely acted like it was a chore to be there.
Air Canada
7.1
Good
11,419 reviews
United Airlines
7.4
Good
10,062 reviews

Food

6.7

Overall

7.4

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Crew

8.1

Reviews

1 / 20
6.0
Good

Dawn,Jul 2026

ORD - GRR

The crew aboard the plane were not very friendly. They definitely acted like it was a chore to be there.
Iberia
7.0
Good
3,265 reviews
United Airlines
7.4
Good
10,062 reviews

Food

6.7

Overall

7.4

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Crew

8.1

Reviews

1 / 20
6.0
Good

Dawn,Jul 2026

ORD - GRR

The crew aboard the plane were not very friendly. They definitely acted like it was a chore to be there.

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 42 times in the past calendar month.

  • How long is the flight from Boston to Porto?

    United Airlines, TAP AIR PORTUGAL, and SWISS can get you from Boston to Porto in just under 10h 20m. Your travel time can differ by up to 20h 40m. 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, British Airways ($344), Lufthansa ($362), and Iberia ($369) offers the cheapest pricing from Boston to Porto. These flights start at 47% 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 $179 on Air Canada. Other airlines that offer cheap prices include United Airlines from $208 and SWISS from $224 one-way.

  • What are the cheapest flights from Boston to Porto?

    Looking at all options, your cheapest flight can be booked for $355. While the most popular route (Boston Logan Intl - Porto) can be booked for $523 on average, our data indicates $1,651 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 Commerce Square. Travelers on a layover in Lisbon can visit Chiado, Praça do Marquês de Pombal, and Commerce Square, by traveling 4.5 mi, 3.6 mi, and 4.7 mi, respectively after landing at Lisbon Humberto Delgado. Travelers in need of a car in Lisbon can rent one for about $24 per day.

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

    Plaza Mayor, Puerta del Sol, and Spain Building are the most popular attractions in Madrid if you're in need of something to do during your layover. Plaza Mayor, Puerta del Sol, and Spain Building can be accessed by traveling approximately 8.6 mi, 8.4 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 $34 per day.

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

    Flights departing from Boston and landing in Porto layover in Madrid least frequently.

  • 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, February is the cheapest month in which you can book a flight from Boston to Porto (average of $402). Flying from Boston to Porto in July is currently the most expensive (average of $919). 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
Arcos de Valdevez
Coimbra
Aveiro

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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 1, 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$344Average$567FlexibilityNo cancel feeOn-time70%
LufthansaCheapest$362Average$601FlexibilityNo cancel feeOn-time76%
IberiaCheapest$369Average$590FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$375Average$646FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$376Average$642FlexibilityNo cancel feeOn-time69%
SWISSCheapest$383Average$606FlexibilityNo cancel feeOn-time79%
KLMCheapest$394Average$733FlexibilityNo cancel feeOn-time75%
DeltaCheapest$394Average$789FlexibilityNo cancel feeOn-timeN/A
TAP AIR PORTUGALCheapest$404Average$773FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$434Average$699FlexibilityNo cancel feeOn-time67%

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