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Porto Alegre

$372+ 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 11/5. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — POA
Aug 23 — Aug 301
Sun 8/23
Sun 8/30
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 July 24, 2026.

This Copa Airlines deal was found by Cheapflights users on 7/22. 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 Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/263:55 pm
BOS
-
POA
1 stop31h 30m
Copa Airlines
Sun 11/81:30 am
POA
-
BOS
1 stop22h 31m
Copa Airlines
Deal found 7/22$710
This LATAM Airlines deal was found by Cheapflights users on 7/22. 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 LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/267:15 am
BOS
-
POA
2 stops22h 25m
LATAM Airlines
Mon 11/94:00 pm
POA
-
BOS
1 stop16h 45m
LATAM Airlines
Deal found 7/22$715
This LATAM Airlines deal was found by Cheapflights users on 7/21. 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 LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/88:55 am
BOS
-
POA
2 stops26h 55m
LATAM Airlines
Sun 11/159:10 am
POA
-
BOS
1 stop23h 35m
LATAM Airlines
Deal found 7/21$718
This Expedia deal was found by Cheapflights users on 7/23. 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.
Fri 8/217:20 am
BOS
-
POA
2 stops22h 00m
LATAM Airlines
Sun 8/307:05 pm
POA
-
BOS
3 stops45h 17m
LATAM Airlines
Deal found 7/23$721
This LATAM Airlines deal was found by Cheapflights users on 7/23. 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 LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/267:00 am
BOS
-
POA
2 stops31h 50m
LATAM Airlines
Sat 12/55:40 pm
POA
-
BOS
2 stops23h 01m
LATAM Airlines
Deal found 7/23$722
This LATAM Airlines deal was found by Cheapflights users on 7/20. 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 LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/167:00 am
BOS
-
POA
2 stops21h 40m
LATAM Airlines
Thu 11/194:00 pm
POA
-
BOS
2 stops21h 19m
LATAM Airlines
Deal found 7/20$725
This Delta deal was found by Cheapflights users on 7/21. 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.
Sun 11/88:55 am
BOS
-
POA
1 stop25h 20m
Delta
Fri 11/135:30 am
POA
-
BOS
2 stops19h 53m
Delta
Deal found 7/21$728
This Cheapflightsfares deal was found by Cheapflights users on 7/19. 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.
Tue 11/247:00 am
BOS
-
POA
2 stops31h 50m
LATAM Airlines
Sat 3/2010:45 am
POA
-
BOS
1 stop21h 00m
LATAM Airlines
Deal found 7/19$748
This oojo deal was found by Cheapflights users on 7/23. 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 11/257:50 pm
BOS
-
POA
2 stops43h 00m
LATAM Airlines
Tue 12/15:30 am
POA
-
BOS
1 stop27h 15m
LATAM Airlines
Deal found 7/23$756

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 July 24, 2026.

Most accurate provider

Ovago
3 stars

Most trusted provider

Ovago
3 stars

Round-trip from

$710
(Copa Airlines)

One-way from

$372
(CVC Viagens)

Popular in

May

Cheapest in

March

Average price

$1,013
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. 19% potential increase in price ($226 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($41 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 July 24, 2026.
Use the filters below to find and compare flights from Boston to Porto Alegre that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Mon 10/26

3:55 pm-12:25 am

1 stop31h 30m

Porto Alegre Salgado Filho

Sun 11/8

1:30 am-10:01 pm

1 stop22h 31m

$710

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Mon 10/26

7:15 am-6:40 am

2 stops22h 25m

Porto Alegre Salgado Filho

Mon 11/9

4:00 pm-6:45 am

1 stop16h 45m

$715
Quickest round-trip

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Mon 11/16

7:37 pm-2:05 pm

2 stops16h 28m

Porto Alegre Salgado Filho

Thu 11/19

2:05 pm-10:23 am

2 stops22h 18m

$772

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Mon 11/23

3:35 pm-2:05 pm

2 stops20h 30m

Porto Alegre Salgado Filho

Tue 12/1

5:10 pm-10:31 am

2 stops19h 21m

$772

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Mon 11/9

7:00 am-6:40 am

2 stops21h 40m

Porto Alegre Salgado Filho

Sun 11/15

6:00 pm-10:03 am

2 stops18h 03m

$780

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Mon 11/16

7:00 am-6:40 am

2 stops21h 40m

Porto Alegre Salgado Filho

Wed 11/18

3:50 am-11:23 pm

2 stops21h 33m

$780

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Mon 10/26

7:15 am-6:40 am

2 stops22h 25m

Porto Alegre Salgado Filho

Mon 11/9

6:00 pm-1:47 pm

2 stops21h 47m

$780

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Tue 11/24

2:50 pm-12:25 am

1 stop31h 35m

Porto Alegre Salgado Filho

Fri 3/19

1:40 am-11:04 pm

1 stop22h 24m

$860
Cheapest one-way
Quickest one-way

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Wed 11/4

7:41 am-12:25 am

1 stop14h 44m

$395

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Thu 11/5

2:50 pm-12:25 am

1 stop31h 35m

$395

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/22

Showing 1-10 of 18 resultsSorted by cheapest first
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 July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
BudgetAirPrice Accuracy2 starsTrust Score*3 stars
oojoPrice Accuracy3 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 Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on Boston-Porto Alegre flight deals on Cheapflights vs. Ovago >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 Ovago the most. Ovago 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, March is the cheapest month in which you can book a flight from Boston to Porto Alegre (average of $712). Flying from Boston to Porto Alegre in May is currently the most expensive (average of $1,392). 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.

How much does it cost to fly round-trip from Boston to Porto Alegre?

Airfare is below average for this route at the moment.

Boston to Porto Alegre flights typically cost between $862 and $1,080 in October.
The cheapest round-trip price found within the last 5 days was $710 on Copa Airlines (Oct 26-Nov 8).

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 July 24, 2026.
Read reviews from past customers who have flown Delta,Copa Airlines, andLATAM 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
7.8
Good
8,482 reviews

Overall

7.8

Boarding

8.1

Comfort

7.8

Entertainment

7.8

Food

7.2

Crew

8.5

Reviews

1 / 20
6.0
Good

Cidalia,Aug 2023

BOS - MIA

I like Delta overall but the delays lately without justification are not leaving a good impression. Both flights were delayed for over 2 hours
Delta
7.8
Good
8,482 reviews
Delta
7.8
Good
8,482 reviews

Overall

7.8

Boarding

8.1

Comfort

7.8

Entertainment

7.8

Food

7.2

Crew

8.5

Reviews

1 / 20
6.0
Good

Cidalia,Aug 2023

BOS - MIA

I like Delta overall but the delays lately without justification are not leaving a good impression. Both flights were delayed for over 2 hours
Copa Airlines
7.6
Good
1,560 reviews
Delta
7.8
Good
8,482 reviews

Overall

7.8

Boarding

8.1

Comfort

7.8

Entertainment

7.8

Food

7.2

Crew

8.5

Reviews

1 / 20
6.0
Good

Cidalia,Aug 2023

BOS - MIA

I like Delta overall but the delays lately without justification are not leaving a good impression. Both flights were delayed for over 2 hours
LATAM Airlines
7.4
Good
1,965 reviews
Delta
7.8
Good
8,482 reviews

Overall

7.8

Boarding

8.1

Comfort

7.8

Entertainment

7.8

Food

7.2

Crew

8.5

Reviews

1 / 20
6.0
Good

Cidalia,Aug 2023

BOS - MIA

I like Delta overall but the delays lately without justification are not leaving a good impression. Both flights were delayed for over 2 hours
United Airlines
7.4
Good
10,026 reviews
Delta
7.8
Good
8,482 reviews

Overall

7.8

Boarding

8.1

Comfort

7.8

Entertainment

7.8

Food

7.2

Crew

8.5

Reviews

1 / 20
6.0
Good

Cidalia,Aug 2023

BOS - MIA

I like Delta overall but the delays lately without justification are not leaving a good impression. Both flights were delayed for over 2 hours

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?

    Copa Airlines, LATAM Airlines, and United Airlines can get you from Boston to Porto Alegre in just under 16h 28m. Your travel time can differ by up to 15h 02m. 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 $294 on this airline. Additional options worth looking into are United Airlines and Delta, starting at $334 and $712 round-trip. Copa Airlines is priced at 69% 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 $292 on United Airlines. Other airlines that offer cheap prices include Copa Airlines from $313 and LATAM Airlines from $345 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, March is the cheapest month in which you can book a flight from Boston to Porto Alegre (average of $712). Flying from Boston to Porto Alegre in May is currently the most expensive (average of $1,392). 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 4 airlines flying from Boston to Porto Alegre

Discover the top 4 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 July 24, 2026.
AirlineCheapestAverageFlexibilityOn-time
Copa AirlinesCheapest$294Average$738FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$334Average$547FlexibilityNo cancel feeOn-time69%
DeltaCheapest$712Average$1,187FlexibilityNo cancel feeOn-timeN/A
LATAM AirlinesCheapest$754Average$1,013FlexibilityNo cancel feeOn-time81%

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