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Porto Alegre

$319+ 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 4/27. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — POA
Mar 16 — Mar 231
Mon 3/16
Mon 3/23
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 February 14, 2026.

This United Airlines deal was found by Cheapflights users on 2/10. 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.
Tue 3/176:30 pm
BOS
-
POA
2 stops18h 55m
United Airlines
Thu 3/193:30 pm
POA
-
BOS
2 stops26h 47m
United Airlines
Deal found 2/10$471
This United Airlines deal was found by Cheapflights users on 2/13. 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.
Mon 3/27:45 am
BOS
-
POA
2 stops28h 25m
United Airlines
Wed 3/185:10 pm
POA
-
BOS
2 stops20h 39m
United Airlines
Deal found 2/13$551
This United Airlines deal was found by Cheapflights users on 2/13. 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.
Tue 3/32:20 pm
BOS
-
POA
2 stops22h 05m
United Airlines
Wed 3/185:10 pm
POA
-
BOS
2 stops20h 39m
United Airlines
Deal found 2/13$606
This Booking.com deal was found by Cheapflights users on 2/13. 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 3/28:55 am
BOS
-
POA
1 stop24h 40m
Multiple Airlines
Wed 3/186:00 am
POA
-
BOS
2 stops26h 35m
Multiple Airlines
Deal found 2/13$685
This Cheapflightsfares deal was found by Cheapflights users on 2/12. 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.
Thu 4/98:45 am
BOS
-
POA
2 stops25h 10m
Avianca
Tue 4/286:15 pm
POA
-
BOS
2 stops37h 55m
Avianca
Deal found 2/12$713
This Delta deal was found by Cheapflights users on 2/13. 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.
Thu 8/209:55 am
BOS
-
POA
1 stop13h 45m
Delta
Wed 9/95:50 pm
POA
-
BOS
1 stop14h 45m
Delta
Deal found 2/13$716
This KAYAK deal was found by Cheapflights users on 2/13. 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.
Thu 8/203:10 pm
BOS
-
POA
2 stops19h 05m
LATAM Airlines
Tue 9/811:00 am
POA
-
BOS
2 stops21h 35m
LATAM Airlines
Deal found 2/13$721
This KAYAK deal was found by Cheapflights users on 2/13. 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 3/45:35 am
BOS
-
POA
2 stops22h 55m
LATAM Airlines
Wed 3/186:00 pm
POA
-
BOS
2 stops22h 09m
LATAM Airlines
Deal found 2/13$722
This KAYAK deal was found by Cheapflights users on 2/13. 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.
Mon 3/28:55 am
BOS
-
POA
1 stop13h 45m
LATAM Airlines
Wed 3/186:00 pm
POA
-
BOS
2 stops22h 09m
LATAM Airlines
Deal found 2/13$724
This KAYAK deal was found by Cheapflights users on 2/13. 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.
Fri 8/215:00 pm
BOS
-
POA
2 stops19h 55m
LATAM Airlines
Wed 9/911:00 am
POA
-
BOS
2 stops21h 35m
LATAM Airlines
Deal found 2/13$726
This KAYAK deal was found by Cheapflights users on 2/13. 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.
Tue 3/31:04 pm
BOS
-
POA
2 stops23h 01m
LATAM Airlines
Mon 3/167:45 am
POA
-
BOS
2 stops18h 28m
LATAM Airlines
Deal found 2/13$728

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 February 14, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$471
(United Airlines)

One-way from

$319
(Kiwi.com)

Popular in

December

Cheapest in

June

Average price

$688
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. 24% potential increase in price ($265 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 8% potential price decrease ($68 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 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 February 14, 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

Tue 3/17

6:30 pm-2:25 pm

2 stops18h 55m

Porto Alegre Salgado Filho

Thu 3/19

3:30 pm-5:17 pm

2 stops26h 47m

$471

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Mon 3/2

7:45 am-2:10 pm

2 stops28h 25m

Porto Alegre Salgado Filho

Wed 3/18

5:10 pm-12:49 pm

2 stops20h 39m

$551

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Mon 3/2

7:45 am-2:10 pm

2 stops28h 25m

Porto Alegre Salgado Filho

Tue 3/17

5:10 pm-2:29 pm

2 stops22h 19m

$551

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Thu 3/5

7:16 am-2:25 pm

2 stops29h 09m

Porto Alegre Salgado Filho

Tue 3/17

3:25 pm-12:49 pm

2 stops22h 24m

$606

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Tue 3/3

2:20 pm-2:25 pm

2 stops22h 05m

Porto Alegre Salgado Filho

Wed 3/18

5:10 pm-12:49 pm

2 stops20h 39m

$606

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Tue 3/3

2:20 pm-4:25 pm

2 stops24h 05m

Porto Alegre Salgado Filho

Tue 3/17

5:10 pm-12:49 pm

2 stops20h 39m

$606

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Thu 4/9

8:45 am-10:55 am

2 stops25h 10m

Porto Alegre Salgado Filho

Tue 4/28

6:15 pm-7:10 am

2 stops37h 55m

$713

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Thu 4/9

9:55 am-2:05 am

1 stop15h 10m

Porto Alegre Salgado Filho

Tue 4/28

5:50 pm-7:35 am

1 stop14h 45m

$716

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Wed 3/4

6:55 am-6:30 am

2 stops21h 35m

Porto Alegre Salgado Filho

Thu 3/19

7:45 am-1:13 am

2 stops18h 28m

$722

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Mon 3/9

9:55 am-12:40 am

1 stop13h 45m

Porto Alegre Salgado Filho

Wed 3/18

6:00 pm-11:10 am

2 stops18h 10m

$724

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/13

Showing 1-10 of 22 results
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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 February.
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 August is currently the most expensive (average of $1,024). 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 February 14, 2026.
Read reviews from past customers who have flown Delta, LATAM Airlines, and Copa 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
8,200 reviews

Boarding

8.1

Entertainment

7.8

Food

7.2

Comfort

7.9

Overall

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
8,200 reviews
Delta
7.9
Good
8,200 reviews

Boarding

8.1

Entertainment

7.8

Food

7.2

Comfort

7.9

Overall

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
1,920 reviews
Delta
7.9
Good
8,200 reviews

Boarding

8.1

Entertainment

7.8

Food

7.2

Comfort

7.9

Overall

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
7.5
Good
1,559 reviews
Delta
7.9
Good
8,200 reviews

Boarding

8.1

Entertainment

7.8

Food

7.2

Comfort

7.9

Overall

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
1,172 reviews
Delta
7.9
Good
8,200 reviews

Boarding

8.1

Entertainment

7.8

Food

7.2

Comfort

7.9

Overall

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
11,288 reviews
Delta
7.9
Good
8,200 reviews

Boarding

8.1

Entertainment

7.8

Food

7.2

Comfort

7.9

Overall

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 can get you from Boston to Porto Alegre in just under 18h 55m. Your travel time can differ by up to . Airlines will cover a distance of 5153 mi.

  • 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 $499 round-trip. Copa Airlines is priced at 66% 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 August is currently the most expensive (average of $1,024). 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 February 14, 2026.
AirlineCheapestAverageFlexibilityOn-time
Copa AirlinesCheapest$279Average$674FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$334Average$547FlexibilityNo cancel feeOn-time69%
DeltaCheapest$499Average$832FlexibilityNo cancel feeOn-timeN/A
LATAM AirlinesCheapest$519Average$766FlexibilityNo cancel feeOn-time81%
American AirlinesCheapest$551Average$688FlexibilityNo cancel feeOn-time71%
GOLCheapest$712Average$853FlexibilityNo cancel feeOn-time74%

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