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Cheap flights from Boston to Porto Alegre from $368

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Boston to Porto Alegre departing on 10/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Travel Warning: Due to flooding, the airport may be currently closed. Check local travel advisories before booking.

Find the cheapest flights from Boston to Porto Alegre

Cheap round-trip flights

Enter your travel dates to find the best prices.
Copa Airlines Logo
8:47 am - 12:20 amBOS  Boston Logan Intl-POA Porto Alegre Salgado Filho
14h 33m1 stop Panama City Tocumen Intl
Copa Airlines Logo
1:30 am - 10:01 pmPOA  Porto Alegre Salgado Filho-BOS Boston Logan Intl
22h 31m1 stop Panama City Tocumen Intl
$680Copa Airlines
Mon, Oct 12 - Mon, Nov 2
Copa Airlines Logo
8:47 am - 12:20 amBOS  Boston Logan Intl-POA Porto Alegre Salgado Filho
14h 33m1 stop Panama City Tocumen Intl
Copa Airlines Logo
1:20 am - 2:29 pmPOA  Porto Alegre Salgado Filho-BOS Boston Logan Intl
14h 09m1 stop Panama City Tocumen Intl
$700Copa Airlines
Tue, Sep 15 - Sat, Oct 3
Multiple Airlines Logo
8:45 am - 10:45 amBOS  Boston Logan Intl-POA Porto Alegre Salgado Filho
25h 00m2 stops Bogotá El Dorado Sao Paulo Guarulhos Intl
Multiple Airlines Logo
6:45 pm - 6:50 amPOA  Porto Alegre Salgado Filho-BOS Boston Logan Intl
37h 05m2 stops Sao Paulo Guarulhos Intl Bogotá El Dorado
$717Multiple Airlines
Tue, Aug 25 - Thu, Sep 17
LATAM Airlines Logo
8:55 am - 8:30 amBOS  Boston Logan Intl-POA Porto Alegre Salgado Filho
21h 35m1 stop Sao Paulo Guarulhos Intl
LATAM Airlines Logo
6:00 pm - 2:33 pmPOA  Porto Alegre Salgado Filho-BOS Boston Logan Intl
22h 33m2 stops Sao Paulo Guarulhos Intl New York John F Kennedy Intl
$728LATAM Airlines
Sun, Nov 15 - Tue, Nov 17
LATAM Airlines Logo
7:20 am - 6:15 pmBOS  Boston Logan Intl-POA Porto Alegre Salgado Filho
33h 55m2 stops Miami Santiago Arturo Merino Benitez
LATAM Airlines Logo
9:55 pm - 7:35 amPOA  Porto Alegre Salgado Filho-BOS Boston Logan Intl
34h 40m1 stop Sao Paulo Guarulhos Intl
$756LATAM Airlines
Wed, Sep 2 - Fri, Sep 18
Multiple Airlines Logo
8:45 am - 12:40 amBOS  Boston Logan Intl-POA Porto Alegre Salgado Filho
38h 55m2 stops Bogotá El Dorado Sao Paulo Guarulhos Intl
Multiple Airlines Logo
7:35 pm - 7:35 amPOA  Porto Alegre Salgado Filho-BOS Boston Logan Intl
37h 00m2 stops Sao Paulo Guarulhos Intl Bogotá El Dorado
$762Multiple Airlines
Tue, Oct 20 - Tue, Oct 27
GOL Logo
7:42 am - 8:35 pmBOS  Boston Logan Intl-POA Porto Alegre Salgado Filho
35h 53m2 stops Miami Sao Paulo Guarulhos Intl
GOL Logo
1:40 pm - 10:14 amPOA  Porto Alegre Salgado Filho-BOS Boston Logan Intl
21h 34m2 stops Sao Paulo Guarulhos Intl Miami
$952GOL
Mon, Sep 21 - Wed, Sep 30
United Airlines Logo
5:45 am - 2:20 pmBOS  Boston Logan Intl-POA Porto Alegre Salgado Filho
31h 35m2 stops Washington, D.C. Dulles Intl Sao Paulo Guarulhos Intl
United Airlines Logo
3:30 pm - 12:46 amPOA  Porto Alegre Salgado Filho-BOS Boston Logan Intl
34h 16m3 stops Rio de Janeiro–Galeão Intl Houston George Bush Intcntl Chicago O'Hare Intl
$1,250United Airlines
Thu, Oct 15 - Mon, Oct 26
United Airlines Logo
5:45 am - 9:55 amBOS  Boston Logan Intl-POA Porto Alegre Salgado Filho
51h 10m2 stops Washington, D.C. Dulles Intl Sao Paulo Guarulhos Intl
United Airlines Logo
3:30 pm - 12:46 amPOA  Porto Alegre Salgado Filho-BOS Boston Logan Intl
34h 16m3 stops Rio de Janeiro–Galeão Intl Houston George Bush Intcntl Chicago O'Hare Intl
$1,422United Airlines
Thu, Oct 15 - Sun, Oct 25
GOL Logo
3:08 pm - 3:00 pmBOS  Boston Logan Intl-POA Porto Alegre Salgado Filho
21h 52m2 stops Miami Sao Paulo Guarulhos Intl
GOL Logo
5:40 am - 8:51 pmPOA  Porto Alegre Salgado Filho-BOS Boston Logan Intl
41h 11m2 stops Sao Paulo Guarulhos Intl Miami
$1,982GOL
Wed, Dec 16 - Tue, Jan 5

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Copa Airlines flights from Boston to Porto Alegre

Our best Copa Airlines deals on Boston to Porto Alegre flight tickets
Copa Airlines
Oct 12
BOS8:47 amBoston Logan Intl
14h 33m
1 stop
POA12:20 amPorto Alegre Salgado Filho
Nov 2
POA1:30 amPorto Alegre Salgado Filho
22h 31m
1 stop
BOS10:01 pmBoston Logan Intl
$680
Copa Airlines
Sep 15
BOS8:47 amBoston Logan Intl
14h 33m
1 stop
POA12:20 amPorto Alegre Salgado Filho
Oct 3
POA1:20 amPorto Alegre Salgado Filho
14h 09m
1 stop
BOS2:29 pmBoston Logan Intl
$700
Copa Airlines
Sep 21
BOS3:55 pmBoston Logan Intl
31h 25m
1 stop
POA12:20 amPorto Alegre Salgado Filho
Sep 29
POA1:20 amPorto Alegre Salgado Filho
22h 42m
1 stop
BOS11:02 pmBoston Logan Intl
$705

Avianca flights from Boston to Porto Alegre

Our best Avianca deals on Boston to Porto Alegre flight tickets
Avianca
Sep 15
BOS8:45 amBoston Logan Intl
49h 05m
2 stops
POA10:50 amPorto Alegre Salgado Filho
Oct 4
POA11:20 amPorto Alegre Salgado Filho
44h 50m
2 stops
BOS7:10 amBoston Logan Intl
$762
Avianca
Oct 15
BOS8:45 amBoston Logan Intl
34h 45m
2 stops
POA8:30 pmPorto Alegre Salgado Filho
Oct 25
POA7:35 pmPorto Alegre Salgado Filho
37h 00m
2 stops
BOS7:35 amBoston Logan Intl
$767

momondo 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, momondo users made 832,500 searches. Data last updated August 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

Price

Cheapest round-trip

BostonPorto Alegre

BOS Boston Logan Intl - POA Porto Alegre Salgado Filho

BOSPOA

Boston Logan Intl

Mon 10/12

8:47 am-12:20 am

1 stop14h 33m

Porto Alegre Salgado Filho

Mon 11/2

1:30 am-10:01 pm

1 stop22h 31m

$680
Quickest round-trip

BostonPorto Alegre

BOS Boston Logan Intl - POA Porto Alegre Salgado Filho

BOSPOA

Boston Logan Intl

Tue 9/15

8:47 am-12:20 am

1 stop14h 33m

Porto Alegre Salgado Filho

Sat 10/3

1:20 am-2:29 pm

1 stop14h 09m

$700

BostonPorto Alegre

BOS Boston Logan Intl - POA Porto Alegre Salgado Filho

BOSPOA

Boston Logan Intl

Tue 8/25

8:45 am-10:45 am

2 stops25h 00m

Porto Alegre Salgado Filho

Thu 9/17

6:45 pm-6:50 am

2 stops37h 05m

$717

BostonPorto Alegre

BOS Boston Logan Intl - POA Porto Alegre Salgado Filho

BOSPOA

Boston Logan Intl

Sun 11/15

8:55 am-8:30 am

1 stop21h 35m

Porto Alegre Salgado Filho

Tue 11/17

6:00 pm-2:33 pm

2 stops22h 33m

$728

BostonPorto Alegre

BOS Boston Logan Intl - POA Porto Alegre Salgado Filho

BOSPOA

Boston Logan Intl

Wed 9/2

7:20 am-6:15 pm

2 stops33h 55m

Porto Alegre Salgado Filho

Fri 9/18

9:55 pm-7:35 am

1 stop34h 40m

$756

BostonPorto Alegre

BOS Boston Logan Intl - POA Porto Alegre Salgado Filho

BOSPOA

Boston Logan Intl

Tue 10/20

8:45 am-12:40 am

2 stops38h 55m

Porto Alegre Salgado Filho

Tue 10/27

7:35 pm-7:35 am

2 stops37h 00m

$762

BostonPorto Alegre

BOS Boston Logan Intl - POA Porto Alegre Salgado Filho

BOSPOA

Boston Logan Intl

Mon 9/21

7:42 am-8:35 pm

2 stops35h 53m

Porto Alegre Salgado Filho

Wed 9/30

1:40 pm-10:14 am

2 stops21h 34m

$952

BostonPorto Alegre

BOS Boston Logan Intl - POA Porto Alegre Salgado Filho

BOSPOA

Boston Logan Intl

Thu 10/15

5:45 am-2:20 pm

2 stops31h 35m

Porto Alegre Salgado Filho

Mon 10/26

3:30 pm-12:46 am

3 stops34h 16m

$1,250

BostonPorto Alegre

BOS Boston Logan Intl - POA Porto Alegre Salgado Filho

BOSPOA

Boston Logan Intl

Thu 10/15

5:45 am-9:55 am

2 stops51h 10m

Porto Alegre Salgado Filho

Sun 10/25

3:30 pm-12:46 am

3 stops34h 16m

$1,422

BostonPorto Alegre

BOS Boston Logan Intl - POA Porto Alegre Salgado Filho

BOSPOA

Boston Logan Intl

Wed 12/16

3:08 pm-3:00 pm

2 stops21h 52m

Porto Alegre Salgado Filho

Tue 1/5

5:40 am-8:51 pm

2 stops41h 11m

$1,982

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Porto Alegre from

How to get the cheapest flight ticket from Boston to Porto Alegre

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Boston and Porto Alegre?

Prices are currently low for flights on this route.

Typical prices usually range from $781 to $1,179.
The lowest price recently found on this route was $680.

What is the cheapest month to fly to Porto Alegre?

The cheapest month to fly to Porto Alegre from Boston is in March. Flight prices, which tend to average around $712, are often lower during this time because this is during the off-season. If you’re not able to fly to Porto Alegre in March, then November is your next best option. Flight prices from Boston to Porto Alegre during November average around $720.

Can stopping save me money on Boston to Porto Alegre flights?

You could potentially save up to 56% on your flight if you consider stops on a Boston to Porto Alegre flight.

How have Boston to Porto Alegre flight prices changed over time?

When to book flights from Boston to Porto Alegre

Are you open to changing your travel dates? Check out the ideal times to fly from Boston to Porto Alegre according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Boston to Porto Alegre (BOS to POA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Boston to Porto Alegre

Fastest flight time

19h 34m

Direct flights

None
The fastest flight from Boston to Porto Alegre takes 19h 34m
There are no direct flights from Boston to Porto Alegre. There are no popular flight routes from Boston to Porto Alegre.
Search flight deals

Frequently asked questions about flying from Boston to Porto Alegre

  • How far is Boston Logan Intl to Porto Alegre Salgado Filho by plane?

    There are 5155.0 mi between Boston Logan Intl and Porto Alegre Salgado Filho. Flights usually cover this in 19h 34m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Boston Logan Intl Airport to Porto Alegre Salgado Filho Airport?

    Prices for flights from Boston Logan Intl Airport to Porto Alegre Salgado Filho Airport were last updated today.

  • How many operators does momondo search for flights from Boston Logan Intl Airport to Porto Alegre Salgado Filho Airport?

  • How old do you have to be to fly from Boston Logan Intl Airport to Porto Alegre Salgado Filho Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Boston Logan Intl Airport to Porto Alegre Salgado Filho Airport.

  • What documentation or ID do you need to fly to Porto Alegre Salgado Filho Airport?

    The travel and health documents required for your trip to Porto Alegre Salgado Filho Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Porto Alegre Salgado Filho Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from Boston to Porto Alegre?

Best airlines flying from Boston to Porto Alegre

Compare and see reviews for airlines that fly from Boston to Porto Alegre with momondo
Airline
Rating
Free Cancellation
Price
Copa AirlinesPriceFrom $294Free CancellationRating
7.6
1,563 reviews
Search Copa Airlines flights
United AirlinesPriceFrom $334Free CancellationRating
7.4
10,089 reviews
Search United Airlines flights
GOLPriceFrom $622Free CancellationRating
7.3
1,272 reviews
Search GOL flights
DeltaPriceFrom $712Free CancellationRating
7.8
8,500 reviews
Search Delta flights
LATAM AirlinesPriceFrom $754Free CancellationRating
7.4
1,975 reviews
Search LATAM Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Boston to Porto Alegre?

It is quick and easy to find Boston to Porto Alegre flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Porto Alegre that suits you.

Can I find flights from Boston to Porto Alegre with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Boston to Porto Alegre flights to just show those with flexible booking policies.

How can momondo help me find flights from Boston to Porto Alegre?

Once all potential Boston to Porto Alegre flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Boston to Porto Alegre right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Porto Alegre, momondo offers a useful price alert feature which will track prices for flights to Porto Alegre from Boston and alert you when they change.

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