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Porto Alegre

$338+ Cheap flights from Boston (BOS) to Porto Alegre (POA)

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 1/22. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — POA
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Cheapflights Tip: The best prices from Boston Logan Intl to Porto Alegre Salgado Filho are usually found in June or May, booked 25 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

Cheap flight deals from Boston to Porto Alegre

Cheapest flights from Boston to Porto Alegre
Explore the most affordable flight options available from Boston to Porto Alegre. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 12, 2025.

This United Airlines deal was found by Cheapflights users on 12/11. 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 12/146:23 pmBOS - POA
2 stops45h 52mUnited Airlines
Thu 1/292:00 pmPOA - BOS
2 stops26h 29mUnited Airlines
Deal found 12/11$883
This Expedia deal was found by Cheapflights users on 12/11. 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.
Tue 12/238:07 pmBOS - POA
2 stops45h 18mMultiple Airlines
Thu 1/2912:40 pmPOA - BOS
1 stop19h 55mMultiple Airlines
Deal found 12/11$915
This Cheapflightsfares deal was found by Cheapflights users on 12/11. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/123:20 pmBOS - POA
2 stops23h 40mLATAM Airlines
Thu 1/2912:40 pmPOA - BOS
1 stop19h 55mLATAM Airlines
Deal found 12/11$1,054
This Expedia deal was found by Cheapflights users on 12/11. 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.
Thu 12/117:59 pmBOS - POA
2 stops43h 01mLATAM Airlines
Thu 1/2910:05 amPOA - BOS
1 stop22h 30mLATAM Airlines
Deal found 12/11$1,084
This Expedia deal was found by Cheapflights users on 12/11. 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.
Thu 12/117:59 pmBOS - POA
3 stops67h 01mMultiple Airlines
Thu 1/291:40 pmPOA - BOS
2 stops27h 09mMultiple Airlines
Deal found 12/11$1,141
This SmartFares deal was found by Cheapflights users on 12/11. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/258:55 amBOS - POA
1 stop13h 45mLATAM Airlines
Sun 1/182:05 pmPOA - BOS
2 stops43h 28mLATAM Airlines
Deal found 12/11$1,160
This Booking.com deal was found by Cheapflights users on 12/11. 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.
Mon 12/228:55 amBOS - POA
1 stop13h 45mMultiple Airlines
Thu 1/291:40 pmPOA - BOS
2 stops42h 55mMultiple Airlines
Deal found 12/11$1,185
This oojo deal was found by Cheapflights users on 12/11. 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.
Thu 12/258:55 amBOS - POA
1 stop13h 45mLATAM Airlines
Sun 12/2812:45 pmPOA - BOS
1 stop19h 50mLATAM Airlines
Deal found 12/11$1,205

Find flight deals from Boston to Porto Alegre

Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to Porto Alegre (POA). 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 December 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$582
(United Airlines)

One-way from

$338
(123 Milhas)

Popular in

December

Cheapest in

June

Average price

$1,368
Provider with most accurate pricing for Boston Logan Intl-Porto Alegre Salgado Filho flight deals.
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Provider most trusted by Cheapflights users for Boston Logan Intl-Porto Alegre Salgado Filho flights.
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From Boston Logan Intl to Porto Alegre Salgado Filho
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One-way flight from Boston Logan Intl to Porto Alegre Salgado Filho
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($157 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($54 potential savings vs. average RT price).
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Average for round-trip flights in December 2025
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Boston to Porto Alegre 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 December 12, 2025.
Use the filters below to find and compare flights from Boston to Porto Alegre that are best for you.

Fly from

Boston

Fly to

Porto Alegre

Route

Depart

Return

Price

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Fri 1/23

10:30 am-1:30 pm

2 stops25h 00m

Porto Alegre Salgado Filho

Thu 2/5

2:05 pm-10:52 am

2 stops22h 47m

$582

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Mon 3/9

8:44 am-12:25 am

1 stop14h 41m

Porto Alegre Salgado Filho

Sun 3/22

1:30 am-11:10 pm

1 stop22h 40m

$602

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Mon 3/2

7:45 am-4:20 pm

2 stops30h 35m

Porto Alegre Salgado Filho

Mon 3/9

3:25 pm-2:31 pm

2 stops24h 06m

$622

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Fri 1/23

8:55 am-9:20 am

1 stop22h 25m

Porto Alegre Salgado Filho

Thu 2/5

6:00 pm-6:35 am

2 stops38h 35m

$682

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Thu 3/5

9:30 am-4:20 pm

2 stops28h 50m

Porto Alegre Salgado Filho

Mon 3/9

3:25 pm-2:31 pm

2 stops24h 06m

$697

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Mon 3/2

8:55 am-9:05 am

1 stop22h 10m

Porto Alegre Salgado Filho

Mon 3/9

11:40 am-7:35 am

2 stops20h 55m

$709

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Sun 3/1

6:55 am-6:30 am

2 stops21h 35m

Porto Alegre Salgado Filho

Sun 3/8

5:55 pm-7:35 am

1 stop14h 40m

$711

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Fri 1/23

8:55 am-12:40 am

1 stop13h 45m

Porto Alegre Salgado Filho

Thu 2/5

5:55 pm-6:35 am

1 stop14h 40m

$713

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Mon 3/30

12:40 pm-11:50 am

2 stops22h 10m

Porto Alegre Salgado Filho

Tue 4/14

5:50 pm-7:35 am

1 stop14h 45m

$717

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Thu 1/22

8:55 am-9:15 am

1 stop22h 20m

$338

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

Showing 1-10 of 15 results
1
2

Compare providers for flights from Boston to Porto Alegre

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 Alegre in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
OvagoPrice Accuracy2 starsTrust Score*2 stars
AranGrantPrice Accuracy2 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 Alegre flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Boston-Porto Alegre flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Boston-Porto Alegre flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Boston-Porto Alegre flights, Cheapflights users trust eDreams the most. eDreams 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 Alegre 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 Alegre

Have a flexible travel schedule? Discover the best time to fly to Porto Alegre 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 Alegre

How far ahead should I book a flight from Boston to Porto Alegre?

Use this chart to determine the optimal time to book a round-trip flight from Boston to Porto Alegre. Price data was last updated on December 5, 2025.

Booking 23 days in advance of your planned departure date is, on average, the best time to get cheap flights from Boston to Porto Alegre. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Boston to Porto Alegre?

Currently, June is the cheapest month in which you can book a flight from Boston to Porto Alegre (average of $202). Flying from Boston to Porto Alegre in January is currently the most expensive (average of $594). 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 POA?

Find hourly flight availability from Boston to Porto Alegre. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 12, 2025.

It’s typically best to fly out from Boston to Porto Alegre in the evening. Doing so could potentially save you 18% on the flight price compared to flying at noon, which is usually more expensive.

Reviews of airlines servicing Porto Alegre

Get insights into the airlines that provide service to Porto Alegre. 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 Alegre. Reviews last updated December 12, 2025.
Read reviews from past customers who have flown Delta, Copa Airlines, and LATAM Airlines from Boston to Porto Alegre. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,005 reviews

Food

7.3

Boarding

8.1

Comfort

7.9

Overall

7.9

Entertainment

7.9

Crew

8.5

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
8,005 reviews
Delta
7.9
Good
8,005 reviews

Food

7.3

Boarding

8.1

Comfort

7.9

Overall

7.9

Entertainment

7.9

Crew

8.5

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.
Copa Airlines
7.6
Good
1,558 reviews
Delta
7.9
Good
8,005 reviews

Food

7.3

Boarding

8.1

Comfort

7.9

Overall

7.9

Entertainment

7.9

Crew

8.5

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.
LATAM Airlines
7.5
Good
1,889 reviews
Delta
7.9
Good
8,005 reviews

Food

7.3

Boarding

8.1

Comfort

7.9

Overall

7.9

Entertainment

7.9

Crew

8.5

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.
GOL
7.3
Good
1,127 reviews
Delta
7.9
Good
8,005 reviews

Food

7.3

Boarding

8.1

Comfort

7.9

Overall

7.9

Entertainment

7.9

Crew

8.5

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.
American Airlines
7.2
Good
11,049 reviews
Delta
7.9
Good
8,005 reviews

Food

7.3

Boarding

8.1

Comfort

7.9

Overall

7.9

Entertainment

7.9

Crew

8.5

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 Alegre. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Boston to Porto Alegre?

    United Airlines and Copa Airlines can get you from Boston to Porto Alegre in just under 14h 41m. Your travel time can differ by up to 10h 19m. Airlines will cover a distance of 5153 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    Our cheapest airline available from Boston to Porto Alegre is Copa Airlines. Our recent data shows that you can find tickets from as low as $279 on this airline. Additional options worth looking into are United Airlines and Delta, starting at $334 and $498 round-trip. Copa Airlines is priced at 64% lower than the current average price of a flight leaving 3 months from now.

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

    One-way options have recently been found by users for as low as $291 on American Airlines. Other airlines that offer cheap prices include LATAM Airlines from $308 and Delta from $309 one-way.

  • Can I find deals for flights from Boston to Porto Alegre that include hotel bookings?

    Yes. In addition to deals on Boston to Porto Alegre flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Boston to Porto Alegre?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to Porto Alegre.

  • Can I find deals for business class flights from Boston to Porto Alegre?

    Yes. Cheapflights offers flight deals from Boston to Porto Alegre 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 Alegre?

    Currently, June is the cheapest month in which you can book a flight from Boston to Porto Alegre (average of $202). Flying from Boston to Porto Alegre in January is currently the most expensive (average of $594). 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

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Complete your trip

Complete your trip to Porto Alegre by adding a car rental and/or hotel reservation to your travel itinerary.
Porto Alegre car rentals
Porto Alegre Salgado Filho Airport car rentals

Top 6 airlines flying from Boston to Porto Alegre

Discover the top 6 airlines that operate flights from Boston to Porto Alegre. 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 December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$334Average$547FlexibilityNo cancel feeOn-time69%
Copa AirlinesCheapest$486Average$691FlexibilityNo cancel feeOn-time70%
DeltaCheapest$498Average$712FlexibilityNo cancel feeOn-timeN/A
LATAM AirlinesCheapest$501Average$662FlexibilityNo cancel feeOn-time81%
American AirlinesCheapest$510Average$669FlexibilityNo cancel feeOn-time71%
GOLCheapest$712Average$853FlexibilityNo cancel feeOn-time74%

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