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$297+ 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 8/26. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — OPO
Jun 3 — Jun 101
Wed 6/3
Wed 6/10
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 February or January, booked 18 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 May 4, 2026.

This United Airlines deal was found by Cheapflights users on 4/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/156:00 am
BOS
-
OPO
2 stops22h 30m
United Airlines
Wed 12/212:30 pm
OPO
-
BOS
2 stops33h 55m
United Airlines
Deal found 4/30$638
This FlightHub deal was found by Cheapflights users on 4/30. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/610:40 am
BOS
-
OPO
2 stops19h 45m
Multiple Airlines
Mon 5/117:20 pm
OPO
-
BOS
1 stop29h 35m
Multiple Airlines
Deal found 4/30$639
This LEVEL deal was found by Cheapflights users on 4/30. 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 LEVEL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/911:00 pm
BOS
-
OPO
1 stop12h 10m
LEVEL
Wed 10/2110:00 pm
OPO
-
BOS
1 stop28h 15m
LEVEL
Deal found 4/30$641
This FlightHub deal was found by Cheapflights users on 4/30. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/245:30 am
BOS
-
OPO
2 stops32h 00m
Multiple Airlines
Tue 12/17:20 pm
OPO
-
BOS
2 stops29h 57m
Multiple Airlines
Deal found 4/30$643
This Justfly.com deal was found by Cheapflights users on 4/30. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/45:30 am
BOS
-
OPO
2 stops24h 45m
Multiple Airlines
Mon 11/99:10 am
OPO
-
BOS
2 stops40h 10m
Multiple Airlines
Deal found 4/30$644
This Gotogate deal was found by Cheapflights users on 5/2. 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.
Sun 5/35:20 pm
BOS
-
OPO
1 stop15h 50m
SWISS
Sun 5/108:40 am
OPO
-
BOS
1 stop16h 15m
SWISS
Deal found 5/2$645
This KLM deal was found by Cheapflights users on 4/30. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/305:00 pm
BOS
-
OPO
1 stop11h 05m
KLM
Thu 11/511:00 am
OPO
-
BOS
1 stop16h 26m
KLM
Deal found 4/30$646
This Justfly.com deal was found by Cheapflights users on 5/4. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/42:22 pm
BOS
-
OPO
2 stops17h 18m
Austrian Airlines
Mon 5/1110:05 am
OPO
-
BOS
2 stops37h 15m
Austrian Airlines
Deal found 5/4$647
This United Airlines deal was found by Cheapflights users on 4/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/53:35 pm
BOS
-
OPO
1 stop10h 25m
United Airlines
Wed 9/212:45 pm
OPO
-
BOS
1 stop13h 42m
United Airlines
Deal found 4/30$648
This FlightHub deal was found by Cheapflights users on 5/4. 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 7/65:45 am
BOS
-
OPO
1 stop20h 15m
Multiple Airlines
Fri 9/48:40 am
OPO
-
BOS
1 stop16h 15m
Multiple Airlines
Deal found 5/4$649
This United Airlines deal was found by Cheapflights users on 4/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/186:00 am
BOS
-
OPO
2 stops22h 30m
United Airlines
Mon 11/2312:35 pm
OPO
-
BOS
2 stops25h 49m
United Airlines
Deal found 4/30$650

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 May 4, 2026.

Most accurate provider

Ovago
3 stars

Most trusted provider

Ovago
3 stars

Round-trip from

$645
(CrystalTravel)

One-way from

$308
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$765

Good round-trip deal

$693 or less

Good one-way deal

$420 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. 23% potential increase in price ($188 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($22 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 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 May 4, 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

Fri 10/30

9:55 am-8:05 am

1 stop18h 10m

Porto

Thu 11/5

11:00 am-6:27 pm

1 stop12h 27m

$646

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 10/11

6:50 pm-7:00 am

1 stop31h 10m

Porto

Fri 10/30

12:35 pm-9:55 am

1 stop25h 20m

$655

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Fri 10/30

6:00 am-9:30 am

1 stop23h 30m

Porto

Thu 11/5

12:35 pm-9:24 am

2 stops25h 49m

$656

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Mon 7/6

9:30 am-7:00 am

2 stops16h 30m

Porto

Fri 9/4

9:00 am-7:16 pm

2 stops15h 16m

$764
Quickest round-trip

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Wed 10/14

11:15 pm-10:45 am

Nonstop6h 30m

Porto

Wed 10/21

6:00 pm-8:20 pm

Nonstop7h 20m

$778

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Mon 8/17

6:50 pm-7:00 am

1 stop31h 10m

Porto

Thu 8/20

11:50 am-5:55 pm

2 stops35h 05m

$784

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Wed 6/10

10:05 am-11:55 am

1 stop20h 50m

Porto

Wed 9/9

8:25 am-8:55 pm

1 stop17h 30m

$822

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sat 6/6

6:50 pm-7:00 am

1 stop31h 10m

Porto

Thu 9/10

11:50 am-2:22 pm

2 stops31h 32m

$828

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 6/14

11:30 pm-9:20 pm

1 stop16h 50m

Porto

Sun 6/28

10:00 pm-9:00 pm

1 stop28h 00m

$840

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 8/16

6:50 pm-7:00 am

1 stop31h 10m

Porto

Sat 8/22

11:20 am-12:47 pm

2 stops30h 27m

$844

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/4

Showing 1-10 of 21 resultsSorted by cheapest first
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 May.
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
Super.comPrice Accuracy-Trust Score*3 stars
CheapflightsfaresPrice Accuracy2 starsTrust Score*1 star
SmartFaresPrice Accuracy1 starTrust Score*1 star
eDreamsPrice Accuracy2 starsTrust Score*3 stars
CheapOairPrice Accuracy3 starsTrust Score*3 stars

*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 17 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 $403). Flying from Boston to Porto in June is currently the most expensive (average of $867). 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 May 4, 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?

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 May 4, 2026.
Read through reviews of airlines operating flights from Boston to Porto, such as Delta,United Airlines, andTAP AIR PORTUGAL. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,460 reviews

Entertainment

7.8

Crew

8.5

Food

7.2

Comfort

7.9

Overall

7.9

Boarding

8.1

Reviews

1 / 20
4.0
Okay

Joel,May 2026

ATL - JAX

The flight was delivered 50 minutes and taxing took what felt like 20 minutes to takeoff.
Delta
7.9
Good
8,460 reviews
Delta
7.9
Good
8,460 reviews

Entertainment

7.8

Crew

8.5

Food

7.2

Comfort

7.9

Overall

7.9

Boarding

8.1

Reviews

1 / 20
4.0
Okay

Joel,May 2026

ATL - JAX

The flight was delivered 50 minutes and taxing took what felt like 20 minutes to takeoff.
United Airlines
7.4
Good
9,682 reviews
Delta
7.9
Good
8,460 reviews

Entertainment

7.8

Crew

8.5

Food

7.2

Comfort

7.9

Overall

7.9

Boarding

8.1

Reviews

1 / 20
4.0
Okay

Joel,May 2026

ATL - JAX

The flight was delivered 50 minutes and taxing took what felt like 20 minutes to takeoff.
TAP AIR PORTUGAL
7.2
Good
2,234 reviews
Delta
7.9
Good
8,460 reviews

Entertainment

7.8

Crew

8.5

Food

7.2

Comfort

7.9

Overall

7.9

Boarding

8.1

Reviews

1 / 20
4.0
Okay

Joel,May 2026

ATL - JAX

The flight was delivered 50 minutes and taxing took what felt like 20 minutes to takeoff.
Air Canada
7.1
Good
10,997 reviews
Delta
7.9
Good
8,460 reviews

Entertainment

7.8

Crew

8.5

Food

7.2

Comfort

7.9

Overall

7.9

Boarding

8.1

Reviews

1 / 20
4.0
Okay

Joel,May 2026

ATL - JAX

The flight was delivered 50 minutes and taxing took what felt like 20 minutes to takeoff.
Iberia
7.0
Good
3,208 reviews
Delta
7.9
Good
8,460 reviews

Entertainment

7.8

Crew

8.5

Food

7.2

Comfort

7.9

Overall

7.9

Boarding

8.1

Reviews

1 / 20
4.0
Okay

Joel,May 2026

ATL - JAX

The flight was delivered 50 minutes and taxing took what felt like 20 minutes to takeoff.

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 24 times in the past calendar month.

  • How long is the flight from Boston to Porto?

    KLM, United Airlines, and TAP AIR PORTUGAL can get you from Boston to Porto in just under 6h 30m. Your travel time can differ by up to 17h. 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 ($248), Lufthansa ($362), and British Airways ($369) offers the cheapest pricing from Boston to Porto. These flights start at 60% 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 Air Canada from $179 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 $371. While the most popular route (Boston Logan Intl - Porto) can be booked for $561 on average, our data indicates $1,020 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?

    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 $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 Ponta Delgada 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 $403). Flying from Boston to Porto in June is currently the most expensive (average of $867). 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 May 4, 2026.
AirlineCheapestAverageFlexibilityOn-time
SWISSCheapest$248Average$617FlexibilityNo cancel feeOn-time79%
LufthansaCheapest$362Average$593FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$369Average$567FlexibilityNo cancel feeOn-time70%
IberiaCheapest$370Average$497FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$378Average$646FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$380Average$632FlexibilityNo cancel feeOn-time69%
KLMCheapest$394Average$691FlexibilityNo cancel feeOn-time75%
DeltaCheapest$394Average$688FlexibilityNo cancel feeOn-timeN/A
TAP AIR PORTUGALCheapest$409Average$758FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$434Average$647FlexibilityNo cancel feeOn-time67%

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