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Porto Alegre

$316+ 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 4/5. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — POA
févr. 26 — mars 51
jeu. 2/26
jeu. 3/5
1 adult, Economy
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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 janvier 27, 2026.

This United Airlines deal was found by Cheapflights users on 1/24. 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.
mar. 3/1712:10 pm
BOS
-
POA
2 stops25h 15m
United Airlines
jeu. 3/193:30 pm
POA
-
BOS
2 stops31h 24m
United Airlines
Deal found 1/24$669
This Orbitz deal was found by Cheapflights users on 1/26. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dim. 3/110:03 am
BOS
-
POA
2 stops18h 27m
LATAM Airlines
sam. 3/145:00 am
POA
-
BOS
2 stops21h 09m
LATAM Airlines
Deal found 1/26$754
This Expedia deal was found by Cheapflights users on 1/26. 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.
dim. 2/228:59 pm
BOS
-
POA
2 stops39h 06m
LATAM Airlines
sam. 3/76:40 am
POA
-
BOS
2 stops28h 24m
LATAM Airlines
Deal found 1/26$945
This Orbitz deal was found by Cheapflights users on 1/26. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sam. 2/216:53 pm
BOS
-
POA
2 stops44h 07m
Multiple Airlines
lun. 3/25:55 pm
POA
-
BOS
2 stops18h 20m
Multiple Airlines
Deal found 1/26$973
This Kiwi.com deal was found by Cheapflights users on 1/26. 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.
dim. 3/15:50 pm
BOS
-
POA
2 stops52h 35m
Multiple Airlines
sam. 3/148:10 pm
POA
-
BOS
1 stop36h 25m
Multiple Airlines
Deal found 1/26$1,098
This United Airlines deal was found by Cheapflights users on 1/27. 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.
lun. 2/169:45 am
BOS
-
POA
2 stops24h 00m
United Airlines
sam. 3/73:40 pm
POA
-
BOS
2 stops22h 09m
United Airlines
Deal found 1/27$1,117
This Delta deal was found by Cheapflights users on 1/27. 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.
lun. 2/168:55 am
BOS
-
POA
1 stop13h 45m
Delta
sam. 3/78:10 pm
POA
-
BOS
2 stops17h 38m
Delta
Deal found 1/27$1,131
This United Airlines deal was found by Cheapflights users on 1/26. 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.
sam. 2/214:25 pm
BOS
-
POA
2 stops45h 55m
United Airlines
lun. 3/23:25 pm
POA
-
BOS
3 stops47h 21m
United Airlines
Deal found 1/26$1,219
This KAYAK deal was found by Cheapflights users on 1/27. 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.
sam. 2/147:59 pm
BOS
-
POA
2 stops26h 41m
LATAM Airlines
sam. 2/216:00 pm
POA
-
BOS
3 stops31h 59m
LATAM Airlines
Deal found 1/27$1,266
This FlightHub deal was found by Cheapflights users on 1/27. 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.
sam. 2/141:30 pm
BOS
-
POA
2 stops39h 00m
LATAM Airlines
ven. 3/68:40 pm
POA
-
BOS
2 stops17h 00m
LATAM Airlines
Deal found 1/27$1,279

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 janvier 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$669
(United Airlines)

One-way from

$316
(United Airlines)

Popular in

December

Cheapest in

June

Average price

$715
Provider with most accurate pricing for Boston Logan Intl-Porto Alegre Salgado Filho flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boston Logan Intl-Porto Alegre Salgado Filho flights.
Search Deals
From Boston Logan Intl to Porto Alegre Salgado Filho
Search Deals
One-way flight from Boston Logan Intl to Porto Alegre Salgado Filho
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($204 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 9% potential price decrease ($71 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

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 janvier 27, 2026.
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

mar. 3/17

12:10 pm-2:25 pm

2 stops25h 15m

Porto Alegre Salgado Filho

jeu. 3/19

3:30 pm-9:54 pm

2 stops31h 24m

$669

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

dim. 3/1

10:03 am-6:30 am

2 stops18h 27m

Porto Alegre Salgado Filho

sam. 3/14

5:00 am-1:09 am

2 stops21h 09m

$754

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

dim. 2/22

8:59 pm-2:05 pm

2 stops39h 06m

Porto Alegre Salgado Filho

sam. 3/7

6:40 am-9:04 am

2 stops28h 24m

$945

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

sam. 2/21

6:53 pm-5:00 pm

2 stops44h 07m

Porto Alegre Salgado Filho

lun. 3/2

5:55 pm-10:15 am

2 stops18h 20m

$973

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

dim. 3/1

5:50 pm-12:25 am

2 stops52h 35m

Porto Alegre Salgado Filho

sam. 3/14

8:10 pm-7:35 am

1 stop36h 25m

$1,098

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

lun. 2/16

9:45 am-11:45 am

2 stops24h 00m

Porto Alegre Salgado Filho

sam. 3/7

3:40 pm-11:49 am

2 stops22h 09m

$1,117

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

lun. 2/16

8:55 am-12:40 am

1 stop13h 45m

Porto Alegre Salgado Filho

sam. 3/7

8:10 pm-11:48 am

2 stops17h 38m

$1,131

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

dim. 4/5

6:00 am-2:20 pm

2 stops31h 20m

$316

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

dim. 4/5

9:55 am-2:05 am

1 stop15h 10m

$333

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

dim. 4/5

9:55 am-12:30 am

1 stop13h 35m

$405

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/24

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 January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Boston-Porto Alegre flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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

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 December is currently the most expensive (average of $684). 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.

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 janvier 27, 2026.
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
8,119 reviews

Boarding

8.1

Crew

8.5

Food

7.2

Comfort

7.9

Overall

7.9

Entertainment

7.8

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
8,119 reviews
Delta
7.9
Good
8,119 reviews

Boarding

8.1

Crew

8.5

Food

7.2

Comfort

7.9

Overall

7.9

Entertainment

7.8

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
8,119 reviews

Boarding

8.1

Crew

8.5

Food

7.2

Comfort

7.9

Overall

7.9

Entertainment

7.8

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
1,912 reviews
Delta
7.9
Good
8,119 reviews

Boarding

8.1

Crew

8.5

Food

7.2

Comfort

7.9

Overall

7.9

Entertainment

7.8

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
1,158 reviews
Delta
7.9
Good
8,119 reviews

Boarding

8.1

Crew

8.5

Food

7.2

Comfort

7.9

Overall

7.9

Entertainment

7.8

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
11,197 reviews
Delta
7.9
Good
8,119 reviews

Boarding

8.1

Crew

8.5

Food

7.2

Comfort

7.9

Overall

7.9

Entertainment

7.8

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 LATAM Airlines can get you from Boston to Porto Alegre in just under 18h 27m. Your travel time can differ by up to 6h 48m. 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 United Airlines from $292 and LATAM Airlines from $308 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 December is currently the most expensive (average of $684). 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

Browse thousands of different options on Cheapflights for your next trip

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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 janvier 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
Copa AirlinesCheapest$279Average$679FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$334Average$547FlexibilityNo cancel feeOn-time69%
DeltaCheapest$498Average$758FlexibilityNo cancel feeOn-timeN/A
LATAM AirlinesCheapest$510Average$754FlexibilityNo cancel feeOn-time81%
American AirlinesCheapest$551Average$688FlexibilityNo cancel feeOn-time71%
GOLCheapest$712Average$853FlexibilityNo cancel feeOn-time74%

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