$396+ Cheap flights from Boston (BOS) to Porto Alegre (POA)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/31. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — POA
Oct 8 — Oct 151
Round-trip
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.Cheap flight deals from Boston to Porto Alegre
Cheapest
Best
Last-minute
One-way
Cheapest flights from Boston to Porto AlegreExplore 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 September 8, 2026.
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 September 8, 2026.
This Avianca deal was found by Cheapflights users on 9/3. 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 Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/208:45 am -
2 stops49h 05m
Thu 10/226:45 pm -
2 stops37h 05m
Deal found 9/3![Avianca logo]()
$788
This LATAM Airlines deal was found by Cheapflights users on 9/3. 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.
Tue 11/242:55 pm -
2 stops22h 25m
Sat 3/205:10 am -
2 stops27h 35m
Deal found 9/3![LATAM Airlines logo]()
$793
This Copa Airlines deal was found by Cheapflights users on 9/6. 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.
Wed 10/213:55 pm -
1 stop31h 25m
Tue 10/271:25 am -
1 stop14h 07m
Deal found 9/6![Copa Airlines logo]()
$806
This Kiwi.com deal was found by Cheapflights users on 9/3. 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.
Tue 9/298:47 am -
1 stop14h 33m
Mon 10/192:05 pm -
2 stops18h 05m
Deal found 9/3![Multiple Airlines logo]()
$832
This Copa Airlines deal was found by Cheapflights users on 9/5. 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.
Wed 12/22:43 pm -
1 stop31h 42m
Thu 12/101:35 am -
1 stop22h 27m
Deal found 9/5![Copa Airlines logo]()
$881
This Copa Airlines deal was found by Cheapflights users on 9/3. 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.
Tue 9/298:47 am -
1 stop14h 33m
Fri 10/91:20 am -
1 stop22h 42m
Deal found 9/3![Copa Airlines logo]()
$916
This American Airlines deal was found by Cheapflights users on 9/5. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/22:00 pm -
2 stops23h 00m
Fri 12/117:35 pm -
2 stops17h 09m
Deal found 9/5![American Airlines logo]()
$923
Best flights from Boston to Porto AlegreDiscover carefully curated flight deals from Boston to Porto Alegre that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 8, 2026.
Discover carefully curated flight deals from Boston to Porto Alegre that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 8, 2026.
This Avianca deal was found by Cheapflights users on 9/7. 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 Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/208:45 am -
2 stops49h 05m
Thu 10/222:05 pm -
2 stops41h 45m
Deal found 9/7![Avianca logo]()
$788
This LATAM Airlines deal was found by Cheapflights users on 9/3. 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.
Tue 11/242:55 pm -
2 stops22h 25m
Sat 3/205:10 am -
2 stops27h 35m
Deal found 9/3![LATAM Airlines logo]()
$793
This Copa Airlines deal was found by Cheapflights users on 9/6. 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.
Wed 10/213:55 pm -
1 stop31h 25m
Tue 10/271:25 am -
1 stop14h 07m
Deal found 9/6![Copa Airlines logo]()
$806
This GOL deal was found by Cheapflights users on 9/7. 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 GOL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/133:00 pm -
2 stops21h 40m
Mon 11/302:15 pm -
2 stops18h 20m
Deal found 9/7![GOL logo]()
$983
This Copa Airlines deal was found by Cheapflights users on 9/6. 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.
Sun 1/242:43 pm -
1 stop31h 52m
Sat 2/271:35 am -
1 stop13h 45m
Deal found 9/6![Copa Airlines logo]()
$831
This Copa Airlines deal was found by Cheapflights users on 9/5. 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.
Wed 12/22:43 pm -
1 stop31h 42m
Thu 12/101:35 am -
1 stop22h 27m
Deal found 9/5![Copa Airlines logo]()
$881
This GOL deal was found by Cheapflights users on 9/4. 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 GOL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/212:01 pm -
2 stops24h 59m
Fri 12/115:25 pm -
2 stops25h 32m
Deal found 9/4![GOL logo]()
$1,002
This Copa Airlines deal was found by Cheapflights users on 9/3. 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.
Tue 9/298:47 am -
1 stop14h 33m
Fri 10/91:20 am -
1 stop22h 42m
Deal found 9/3![Copa Airlines logo]()
$916
Last-minute flights from Boston to Porto AlegreDiscover last-minute flight deals from Boston to Porto Alegre. Data last updated September 8, 2026 and is based on user searches.
Discover last-minute flight deals from Boston to Porto Alegre. Data last updated September 8, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 9/3. 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.
Tue 9/298:47 am -
1 stop14h 33m
Mon 10/192:05 pm -
2 stops18h 05m
Deal found 9/3![Multiple Airlines logo]()
$832
This Copa Airlines deal was found by Cheapflights users on 9/3. 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.
Tue 9/298:47 am -
1 stop14h 33m
Fri 10/91:20 am -
1 stop22h 42m
Deal found 9/3![Copa Airlines logo]()
$916
This Expedia deal was found by Cheapflights users on 9/3. 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 9/299:41 am -
2 stops22h 39m
Fri 10/94:05 am -
2 stops27h 45m
Deal found 9/3![Multiple Airlines logo]()
$1,021
This Copa Airlines deal was found by Cheapflights users on 9/3. 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.
Tue 9/298:47 am -
1 stop14h 33m
Thu 10/81:20 am -
1 stop22h 42m
Deal found 9/3![Copa Airlines logo]()
$1,071
This Avianca deal was found by Cheapflights users on 9/3. 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 Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/208:45 am -
2 stops49h 05m
Thu 10/226:45 pm -
2 stops37h 05m
Deal found 9/3![Avianca logo]()
$788
This LATAM Airlines deal was found by Cheapflights users on 9/4. 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.
Tue 10/203:33 pm -
2 stops21h 42m
Thu 10/2212:10 pm -
1 stop20h 25m
Deal found 9/4![LATAM Airlines logo]()
$1,047
This Copa Airlines deal was found by Cheapflights users on 9/6. 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.
Wed 10/213:55 pm -
1 stop31h 25m
Tue 10/271:25 am -
1 stop14h 07m
Deal found 9/6![Copa Airlines logo]()
$806
This United Airlines deal was found by Cheapflights users on 9/6. 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.
Wed 10/218:05 am -
2 stops29h 45m
Wed 10/285:10 pm -
2 stops21h 49m
Deal found 9/6![United Airlines logo]()
$937
This Mytrip deal was found by Cheapflights users on 9/6. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/214:50 pm -
3 stops26h 10m
Wed 10/288:35 am -
2 stops24h 00m
Deal found 9/6![Multiple Airlines logo]()
$944
One-way flights from Boston to Porto AlegreSearch for one-way flight options from Boston to Porto Alegre. Find affordable one-way fares based on user searches. Data last updated September 8, 2026.
Search for one-way flight options from Boston to Porto Alegre. Find affordable one-way fares based on user searches. Data last updated September 8, 2026.
This KAYAK deal was found by Cheapflights users on 9/6. 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 12/313:00 pm -
2 stops18h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![GOL logo]()
$396
This Justfly.com deal was found by Cheapflights users on 9/7. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/88:45 am -
2 stops34h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Multiple Airlines logo]()
$398
This Ovago deal was found by Cheapflights users on 9/6. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/306:18 pm -
2 stops39h 32m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![GOL logo]()
$414
This Copa Airlines deal was found by Cheapflights users on 9/6. 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.
Thu 12/312:43 pm -
1 stop31h 52m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Copa Airlines logo]()
$430
This LATAM Airlines deal was found by Cheapflights users on 9/4. 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 11/229:10 am -
2 stops29h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![LATAM Airlines logo]()
$434
This LATAM Airlines deal was found by Cheapflights users on 9/7. 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.
Wed 10/71:00 pm -
2 stops24h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Multiple Airlines logo]()
$440
This Kiwi.com deal was found by Cheapflights users on 9/8. 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.
Wed 1/67:34 am -
1 stop15h 01m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Copa Airlines logo]()
$453
This Copa Airlines deal was found by Cheapflights users on 9/6. 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.
Tue 1/127:34 am -
1 stop15h 01m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Copa Airlines logo]()
$455
This Kiwi.com deal was found by Cheapflights users on 9/6. 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.
Thu 12/312:43 pm -
3 stops27h 47m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Multiple Airlines logo]()
$461
This FlightHub deal was found by Cheapflights users on 9/8. 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.
Mon 1/43:00 pm -
2 stops18h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![GOL logo]()
$465
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 September 8, 2026.
Most accurate provider | Ovago 3 stars |
|---|---|
Most trusted provider | Ovago 3 stars |
Round-trip from | $788 (Avianca) |
One-way from | $396 (KAYAK) |
Popular in | December |
Cheapest in | March |
Average price | $736 |
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 7,457,451 searches. Data last updated September 8, 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
Cheapest round-trip
BostonPorto Alegre
BOS Boston Logan Intl - POA Porto Alegre Salgado Filho
BOSPOA
Boston Logan Intl
Wed 12/30
6:18 pm-11:50 am
2 stops39h 32m
Porto Alegre Salgado Filho
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$414
Quickest round-trip
BostonPorto Alegre
BOS Boston Logan Intl - POA Porto Alegre Salgado Filho
BOSPOA
Boston Logan Intl
Thu 12/31
7:34 am-12:25 am
1 stop14h 51m
Porto Alegre Salgado Filho
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$430
BostonPorto Alegre
BOS Boston Logan Intl - POA Porto Alegre Salgado Filho
BOSPOA
Boston Logan Intl
Wed 10/7
1:00 pm-2:15 pm
2 stops24h 15m
Porto Alegre Salgado Filho
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$440
BostonPorto Alegre
BOS Boston Logan Intl - POA Porto Alegre Salgado Filho
BOSPOA
Boston Logan Intl
Tue 1/12
7:34 am-12:35 am
1 stop15h 01m
Porto Alegre Salgado Filho
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$455
BostonPorto Alegre
BOS Boston Logan Intl - POA Porto Alegre Salgado Filho
BOSPOA
Boston Logan Intl
Wed 12/30
3:31 pm-12:55 pm
3 stops43h 24m
Porto Alegre Salgado Filho
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$467
BostonPorto Alegre
BOS Boston Logan Intl - POA Porto Alegre Salgado Filho
BOSPOA
Boston Logan Intl
Fri 1/1
7:34 am-12:35 am
1 stop15h 01m
Porto Alegre Salgado Filho
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$475
BostonPorto Alegre
BOS Boston Logan Intl - POA Porto Alegre Salgado Filho
BOSPOA
Boston Logan Intl
Wed 1/6
6:55 am-5:05 pm
2 stops32h 10m
Porto Alegre Salgado Filho
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$491
BostonPorto Alegre
BOS Boston Logan Intl - POA Porto Alegre Salgado Filho
BOSPOA
Boston Logan Intl
Wed 10/14
8:47 am-9:50 am
3 stops24h 03m
Porto Alegre Salgado Filho
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$502
BostonPorto Alegre
BOS Boston Logan Intl - POA Porto Alegre Salgado Filho
BOSPOA
Boston Logan Intl
Tue 1/5
2:43 pm-12:35 am
1 stop31h 52m
Porto Alegre Salgado Filho
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$610
BostonPorto Alegre
BOS Boston Logan Intl - POA Porto Alegre Salgado Filho
BOSPOA
Boston Logan Intl
Thu 10/8
3:33 pm-6:25 pm
3 stops25h 52m
Porto Alegre Salgado Filho
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$612
Showing 1-10 of 18 resultsSorted by cheapest first
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 September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*2 stars |
- 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.
BOS-POA
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 December is currently the most expensive (average of $1,439). 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 typical for this route at the moment.
Boston to Porto Alegre flights typically cost between $695 and $831 in October.The cheapest round-trip price found within the last 5 days was $788 on Avianca (Oct 20-Oct 22).
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 September 8, 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.
Overall
7.8
Comfort
7.8
Boarding
8.1
Food
7.2
Entertainment
7.8
Crew
8.5
Reviews
1 / 20
6.0
GoodCidalia,Aug 2023
BOS - MIA
Overall
7.8
Comfort
7.8
Boarding
8.1
Food
7.2
Entertainment
7.8
Crew
8.5
Reviews
1 / 20
6.0
GoodCidalia,Aug 2023
BOS - MIA
Overall
7.8
Comfort
7.8
Boarding
8.1
Food
7.2
Entertainment
7.8
Crew
8.5
Reviews
1 / 20
6.0
GoodCidalia,Aug 2023
BOS - MIA
Overall
7.8
Comfort
7.8
Boarding
8.1
Food
7.2
Entertainment
7.8
Crew
8.5
Reviews
1 / 20
6.0
GoodCidalia,Aug 2023
BOS - MIA
Overall
7.8
Comfort
7.8
Boarding
8.1
Food
7.2
Entertainment
7.8
Crew
8.5
Reviews
1 / 20
6.0
GoodCidalia,Aug 2023
BOS - MIA
Overall
7.8
Comfort
7.8
Boarding
8.1
Food
7.2
Entertainment
7.8
Crew
8.5
Reviews
1 / 20
6.0
GoodCidalia,Aug 2023
BOS - MIA
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.
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
Flights by cabin class
Other flight options
Other flights from Boston
Popular flights
Porto Alegre flight routes
Complete your trip
Complete your trip to Porto Alegre by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Boston to Porto Alegre by cabin class
Find flights from Boston to Porto Alegre, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Boston and Porto Alegre flights
Browse other Boston and Porto Alegre flight options. Last updated on September 8, 2026.
Other flights from Boston
Browse through other flights departing from Boston. Flights are based on user searches made on Cheapflights and were last updated on September 8, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to Porto Alegre
Explore flights to Porto Alegre departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 8, 2026.
Top 5 airlines flying from Boston to Porto Alegre
Discover the top 5 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 7,457,451 searches. Data last updated September 8, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$294 | Average$813 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$334 | Average$547 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$622 | Average$1,154 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$712 | Average$1,342 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$754 | Average$1,015 | FlexibilityNo cancel fee | On-time81% |