HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Porto Alegre

$399+ 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 12/27. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — POA
Nov 27 — Dec 41
Thu 11/27
Thu 12/4
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Boston to Porto Alegre 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 Alegre Salgado Filho are usually found in June or May, booked 23 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

Find 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 October 28, 2025.

This United Airlines deal was found by Cheapflights users on 10/26. 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.
Mon 10/273:37 pmBOS - POA
2 stops21h 28mUnited Airlines
Mon 11/35:10 pmPOA - BOS
2 stops19h 24mUnited Airlines
Deal found 10/26$581
This Copa Airlines deal was found by Cheapflights users on 10/26. 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 Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/247:34 amBOS - POA
1 stop14h 56mCopa Airlines
Sun 12/71:35 amPOA - BOS
1 stop23h 05mCopa Airlines
Deal found 10/26$638
This Flysmarter deal was found by Cheapflights users on 10/26. 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 Flysmarter is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/241:32 pmBOS - POA
2 stops28h 23mMultiple Airlines
Mon 12/82:05 pmPOA - BOS
2 stops24h 38mMultiple Airlines
Deal found 10/26$692
This LATAM Airlines deal was found by Cheapflights users on 10/26. 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 LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/279:55 amBOS - POA
1 stop24h 40mLATAM Airlines
Mon 11/37:30 pmPOA - BOS
2 stops37h 05mLATAM Airlines
Deal found 10/26$712
This Cheapflightsfares deal was found by Cheapflights users on 10/26. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/169:59 amBOS - POA
2 stops29h 56mLATAM Airlines
Wed 12/2412:40 pmPOA - BOS
2 stops27h 12mLATAM Airlines
Deal found 10/26$814
This Delta deal was found by Cheapflights users on 10/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/166:45 amBOS - POA
2 stops21h 45mDelta
Wed 12/246:05 pmPOA - BOS
1 stop14h 30mDelta
Deal found 10/26$971
This Copa Airlines deal was found by Cheapflights users on 10/26. 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 Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/278:41 amBOS - POA
1 stop14h 39mCopa Airlines
Sun 11/21:35 amPOA - BOS
1 stop22h 28mCopa Airlines
Deal found 10/26$1,048

Cheap 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 October 28, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$554
(United Airlines)

One-way from

$399
(LATAM Airlines)

Popular in

August

Cheapest in

June

Average price

$679
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. 14% potential increase in price ($126 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($28 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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 October 28, 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

Mon 11/24

7:34 am-12:30 am

1 stop14h 56m

Porto Alegre Salgado Filho

Sun 12/7

1:35 am-10:40 pm

1 stop23h 05m

$638

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Mon 11/24

8:55 am-2:10 pm

2 stops51h 15m

Porto Alegre Salgado Filho

Sun 12/7

1:35 am-10:40 pm

1 stop23h 05m

$710

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Sun 11/16

6:45 am-6:30 am

2 stops21h 45m

Porto Alegre Salgado Filho

Wed 12/24

6:05 pm-6:35 am

1 stop14h 30m

$971

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Sun 11/16

7:34 am-12:30 am

1 stop14h 56m

Porto Alegre Salgado Filho

Tue 12/23

1:35 am-1:24 pm

1 stop13h 49m

$1,165

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Thu 12/11

12:10 pm-5:00 pm

2 stops26h 50m

Porto Alegre Salgado Filho

Wed 12/17

4:40 am-6:54 pm

2 stops40h 14m

$1,208

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Thu 12/11

7:34 am-12:30 am

1 stop14h 56m

Porto Alegre Salgado Filho

Thu 12/18

5:10 am-6:47 pm

2 stops39h 37m

$1,283

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Wed 12/31

9:30 am-1:15 pm

2 stops25h 45m

Porto Alegre Salgado Filho

Thu 1/1

5:55 pm-11:12 am

2 stops19h 17m

$1,869

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Tue 12/23

6:40 am-2:05 pm

2 stops29h 25m

Porto Alegre Salgado Filho

Thu 1/1

7:45 am-10:19 am

2 stops28h 34m

$1,887

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Sat 12/27

10:20 am-9:15 am

2 stops20h 55m

$399

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Sat 12/27

5:20 am-7:55 pm

2 stops36h 35m

$571

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Showing 1-10 of 16 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 October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 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 October 24, 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 August is currently the most expensive (average of $585). 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 October 28, 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 October 28, 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
7,995 reviews

Food

7.3

Crew

8.5

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
7.9
Good
7,995 reviews
Delta
7.9
Good
7,995 reviews

Food

7.3

Crew

8.5

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Copa Airlines
7.6
Good
1,560 reviews
Delta
7.9
Good
7,995 reviews

Food

7.3

Crew

8.5

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
LATAM Airlines
7.5
Good
1,871 reviews
Delta
7.9
Good
7,995 reviews

Food

7.3

Crew

8.5

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
GOL
7.3
Good
1,119 reviews
Delta
7.9
Good
7,995 reviews

Food

7.3

Crew

8.5

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
American Airlines
7.2
Good
11,033 reviews
Delta
7.9
Good
7,995 reviews

Food

7.3

Crew

8.5

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

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, Delta, and LATAM Airlines can get you from Boston to Porto Alegre in just under 14h 56m. Your travel time can differ by up to 11h 54m. 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 United Airlines. Our recent data shows that you can find tickets from as low as $334 on this airline. Additional options worth looking into are Copa Airlines and Delta, starting at $486 and $498 round-trip. United Airlines is priced at 54% 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 $399 on LATAM Airlines. Other airlines that offer cheap prices include United Airlines from $571 and GOL from $712 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 $585). 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

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

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 October 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$334Average$547FlexibilityNo cancel feeOn-time69%
Copa AirlinesCheapest$486Average$697FlexibilityNo cancel feeOn-time70%
DeltaCheapest$498Average$688FlexibilityNo cancel feeOn-timeN/A
LATAM AirlinesCheapest$501Average$664FlexibilityNo cancel feeOn-time81%
American AirlinesCheapest$510Average$697FlexibilityNo cancel feeOn-time71%
GOLCheapest$712Average$863FlexibilityNo cancel feeOn-time74%

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.