HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Porto

$345+ 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 8/24. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — OPO
Jul 7 — Jul 141
Mon 7/7
Mon 7/14
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

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”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Boston Logan Intl to Porto are usually found in January or November, booked 42 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 July 2, 2025.

Round-trip from

$533
(Mytrip)

One-way from

$345
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$799

Good round-trip deal

$688 or less

Good one-way deal

$403 or less
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. 15% potential increase in price ($122 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
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

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 July 2, 2025.

This Air Canada deal was found by Cheapflights users on 7/1. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/264:45 pmBOS - OPO
2 stops35h 50mAir Canada
Sat 10/116:15 amOPO - BOS
2 stops32h 15mAir Canada
Deal found 7/1$544
This Iberia deal was found by Cheapflights users on 6/30. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/209:20 pmBOS - OPO
1 stop9h 20mIberia
Sun 10/58:15 amOPO - BOS
1 stop11h 45mIberia
Deal found 6/30$545
This Lufthansa deal was found by Cheapflights users on 6/30. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/289:30 amBOS - OPO
2 stops32h 50mLufthansa
Thu 9/116:00 amOPO - BOS
1 stop19h 10mLufthansa
Deal found 6/30$547
This Kiwi.com deal was found by Cheapflights users on 7/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/135:05 pmBOS - OPO
1 stop13h 55mSWISS
Tue 7/298:40 amOPO - BOS
1 stop16h 15mSWISS
Deal found 7/1$548
This oojo deal was found by Cheapflights users on 7/2. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2710:35 pmBOS - OPO
Nonstop6h 40mTAP AIR PORTUGAL
Sun 9/147:00 amOPO - BOS
1 stop12h 20mTAP AIR PORTUGAL
Deal found 7/2$549
This Delta deal was found by Cheapflights users on 7/1. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/66:45 pmBOS - OPO
1 stop15h 50mDelta
Wed 8/206:15 amOPO - BOS
1 stop12h 20mDelta
Deal found 7/1$550
This Ovago deal was found by Cheapflights users on 6/30. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/288:10 pmBOS - OPO
1 stop19h 10mBritish Airways
Mon 9/1512:20 pmOPO - BOS
1 stop31h 40mBritish Airways
Deal found 6/30$563
This United Airlines deal was found by Cheapflights users on 6/30. 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.
Sat 8/236:40 pmBOS - OPO
1 stop9h 55mUnited Airlines
Sun 9/711:20 amOPO - BOS
1 stop27h 10mUnited Airlines
Deal found 6/30$564
This United deal was found by Cheapflights users on 7/1. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/177:00 amBOS - OPO
1 stop19h 05mMultiple Airlines
Sun 7/208:40 amOPO - BOS
1 stop16h 15mMultiple Airlines
Deal found 7/1$573

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 July 2, 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

Sat 9/13

6:05 am-8:25 am

2 stops21h 20m

Porto

Wed 10/1

11:35 am-6:20 pm

1 stop11h 45m

$544

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sat 9/20

9:20 pm-11:40 am

1 stop9h 20m

Porto

Sun 10/5

8:15 am-3:00 pm

1 stop11h 45m

$545

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Thu 8/28

9:30 am-11:20 pm

2 stops32h 50m

Porto

Thu 9/11

6:00 am-8:10 pm

1 stop19h 10m

$547

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 7/13

5:05 pm-12:00 pm

1 stop13h 55m

Porto

Tue 7/29

8:40 am-7:55 pm

1 stop16h 15m

$548

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Wed 7/23

12:15 pm-9:20 am

2 stops16h 05m

Porto

Sat 7/26

2:50 am-7:55 pm

2 stops22h 05m

$549

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 9/21

6:50 pm-9:35 am

2 stops33h 45m

Porto

Sun 10/5

6:15 am-9:30 am

2 stops32h 15m

$554

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sat 8/23

6:40 pm-9:35 am

1 stop9h 55m

Porto

Sun 9/7

11:20 am-9:30 am

1 stop27h 10m

$564

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Wed 8/20

10:50 pm-10:30 am

Nonstop6h 40m

Porto

Sat 9/20

5:40 pm-8:20 pm

Nonstop7h 40m

$568

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 8/24

10:55 pm-10:35 am

Nonstop6h 40m

$345

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sat 7/26

11:35 pm-9:35 am

2 stops29h 00m

$349

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/30

Showing 1-10 of 15 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 June 27, 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, 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 $1,033). 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 July 2, 2025.

It’s optimal to fly from Boston to Porto in the morning. By choosing this option you can save up to 21% on the cost of your flight, compared to a flight in the evening.

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 July 2, 2025.
Read through reviews of airlines operating flights from Boston to Porto, such as Delta, Azores Airlines, and SWISS. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,983 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Crew

8.5

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
7,983 reviews
Delta
8.0
Very good
7,983 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Crew

8.5

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
7.6
Good
66 reviews
Delta
8.0
Very good
7,983 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Crew

8.5

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!
SWISS
7.5
Good
1,654 reviews
Delta
8.0
Very good
7,983 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Crew

8.5

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
8,861 reviews
Delta
8.0
Very good
7,983 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Crew

8.5

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!
Air Canada
7.1
Good
9,669 reviews
Delta
8.0
Very good
7,983 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Crew

8.5

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.

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

    According to our current data, United Airlines ($534), Delta ($544), and Iberia ($545) offers the cheapest pricing from Boston to Porto. These flights start at 18% 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 $345 on TAP AIR PORTUGAL. Other airlines that offer cheap prices include Air Canada from $359 and United Airlines from $364 one-way.

  • What are the cheapest flights from Boston to Porto?

    Looking at all options, your cheapest flight can be booked for $283. While the most popular route (Boston Logan Intl - Porto) can be booked for $368 on average our data indicates $1,414 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 $23 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 $28 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 $1,033). 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 Boston?

Book flights to Boston if you plan to visit one of these locations
Aveiro
Coimbra
Matosinhos

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 July 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
Azores AirlinesCheapest$311Average$597FlexibilityNo cancel feeOn-time74%
IberiaCheapest$402Average$633FlexibilityNo cancel feeOn-time77%
SWISSCheapest$452Average$625FlexibilityNo cancel feeOn-time79%
KLMCheapest$506Average$648FlexibilityNo cancel feeOn-time75%
DeltaCheapest$512Average$776FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$515Average$664FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$518Average$691FlexibilityNo cancel feeOn-time70%
TAP AIR PORTUGALCheapest$526Average$767FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$544Average$765FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$554Average$737FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.