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$239+ 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 10/4. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — OPO
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
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 54 days in advance, depart on a Friday or Tuesday 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 September 17, 2025.

Round-trip from

$415
(KAYAK)

One-way from

$239
(SmartFares)

Popular in

June

Cheapest in

January

Average price

$656

Good round-trip deal

$622 or less

Good one-way deal

$241 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 ($121 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($16 potential savings vs. average RT price).
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Average for round-trip flights in September 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 September 17, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/145:05 pmBOS - OPO
1 stop13h 25mMultiple Airlines
Mon 10/206:15 amOPO - BOS
1 stop16h 25mMultiple Airlines
Deal found 9/16$416
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/225:05 pmBOS - OPO
1 stop13h 20mMultiple Airlines
Sun 11/96:15 amOPO - BOS
1 stop17h 20mMultiple Airlines
Deal found 9/15$417
This United deal was found by Cheapflights users on 9/16. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/61:30 pmBOS - OPO
1 stop15h 00mMultiple Airlines
Tue 11/1112:05 pmOPO - BOS
1 stop13h 15mMultiple Airlines
Deal found 9/16$418
This United Airlines deal was found by Cheapflights users on 9/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/54:20 pmBOS - OPO
1 stop18h 05mUnited Airlines
Fri 11/1412:35 pmOPO - BOS
2 stops27h 03mUnited Airlines
Deal found 9/15$420
This Mytrip deal was found by Cheapflights users on 9/16. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1310:15 amBOS - OPO
2 stops19h 55mMultiple Airlines
Tue 12/212:05 pmOPO - BOS
1 stop13h 15mMultiple Airlines
Deal found 9/16$421
This KAYAK deal was found by Cheapflights users on 9/15. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/59:50 pmBOS - OPO
1 stop15h 45mSWISS
Tue 11/189:10 amOPO - BOS
2 stops16h 10mSWISS
Deal found 9/15$422
This United deal was found by Cheapflights users on 9/17. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/95:30 amBOS - OPO
2 stops23h 00mMultiple Airlines
Sun 11/237:25 pmOPO - BOS
1 stop29h 35mMultiple Airlines
Deal found 9/17$423
This Expedia deal was found by Cheapflights users on 9/17. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/157:25 amBOS - OPO
1 stop20h 40mMultiple Airlines
Wed 10/228:15 amOPO - BOS
1 stop16h 35mMultiple Airlines
Deal found 9/17$424
This SWISS deal was found by Cheapflights users on 9/15. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/39:50 pmBOS - OPO
1 stop32h 25mSWISS
Sun 11/96:35 pmOPO - BOS
2 stops54h 45mSWISS
Deal found 9/15$425
This American Airlines deal was found by Cheapflights users on 9/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/711:56 amBOS - OPO
2 stops14h 44mAmerican Airlines
Fri 11/1412:25 pmOPO - BOS
2 stops15h 21mAmerican Airlines
Deal found 9/16$426
This United deal was found by Cheapflights users on 9/14. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/28:15 amBOS - OPO
1 stop20h 15mMultiple Airlines
Sun 11/166:15 amOPO - BOS
1 stop17h 20mMultiple Airlines
Deal found 9/14$427
This Booking.com deal was found by Cheapflights users on 9/14. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/155:05 pmBOS - OPO
1 stop13h 20mSWISS
Thu 10/307:25 pmOPO - BOS
1 stop29h 55mSWISS
Deal found 9/14$428

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 September 17, 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

Thu 11/6

1:30 pm-9:30 am

1 stop15h 00m

Porto

Tue 11/11

12:05 pm-8:20 pm

1 stop13h 15m

$418

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Wed 3/11

8:00 pm-9:30 am

1 stop9h 30m

Porto

Fri 4/10

12:35 pm-8:13 pm

1 stop12h 38m

$420

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Mon 3/9

8:00 pm-9:30 am

1 stop9h 30m

Porto

Fri 4/10

12:35 pm-6:13 pm

1 stop10h 38m

$420

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 3/8

6:30 pm-9:30 am

1 stop11h 00m

Porto

Fri 4/10

12:35 pm-8:13 pm

1 stop12h 38m

$420

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Wed 3/11

8:00 pm-9:30 am

1 stop9h 30m

Porto

Thu 4/9

12:35 pm-8:13 pm

1 stop12h 38m

$420

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 11/9

6:25 pm-9:30 am

1 stop10h 05m

Porto

Sun 11/16

6:15 am-6:35 pm

1 stop17h 20m

$422

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Thu 11/13

10:40 am-9:30 am

2 stops17h 50m

Porto

Tue 12/2

12:05 pm-8:20 pm

1 stop13h 15m

$423

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Tue 3/10

10:44 am-9:30 am

2 stops18h 46m

Porto

Wed 4/8

12:35 pm-6:13 pm

1 stop10h 38m

$424

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Wed 3/11

10:44 am-9:30 am

2 stops18h 46m

Porto

Wed 4/8

12:35 pm-6:13 pm

1 stop10h 38m

$424

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Mon 3/9

12:20 pm-9:30 am

2 stops17h 10m

Porto

Thu 4/9

12:35 pm-8:13 pm

1 stop12h 38m

$424

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/16

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 September 12, 2025.

To ensure you get the cheapest price possible for a flight from Boston to Porto, you should look to book at least 54 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 $1,028). 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 September 17, 2025.

It’s optimal to fly from Boston to Porto in the morning. By choosing this option you can save up to 7% on the cost of your flight, compared to a flight in the afternoon.

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 September 17, 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
7,961 reviews

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

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
7,961 reviews
Delta
8.0
Very good
7,961 reviews

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

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
73 reviews
Delta
8.0
Very good
7,961 reviews

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

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
8,926 reviews
Delta
8.0
Very good
7,961 reviews

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

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
1,977 reviews
Delta
8.0
Very good
7,961 reviews

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

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
2,925 reviews
Delta
8.0
Very good
7,961 reviews

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

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.

  • How long is the flight from Boston to Porto?

    United Airlines can get you from Boston to Porto in just under 9h 30m. 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, Azores Airlines ($299), SWISS ($338), and British Airways ($374) offers the cheapest pricing from Boston to Porto. These flights start at 54% 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 $197. While the most popular route (Boston Logan Intl - Porto) can be booked for $354 on average, our data indicates $1,182 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 $19 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 $25 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 $1,028). 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 September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
Azores AirlinesCheapest$299Average$587FlexibilityNo cancel feeOn-time74%
SWISSCheapest$338Average$609FlexibilityNo cancel feeOn-time79%
British AirwaysCheapest$374Average$644FlexibilityNo cancel feeOn-time70%
IberiaCheapest$375Average$605FlexibilityNo cancel feeOn-time77%
KLMCheapest$394Average$652FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$453Average$719FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$457Average$642FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$474Average$751FlexibilityNo cancel feeOn-time71%
TAP AIR PORTUGALCheapest$500Average$756FlexibilityNo cancel feeOn-timeN/A
DeltaCheapest$505Average$778FlexibilityNo cancel feeOn-timeN/A

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