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Cheap flights from Boston to Porto Alegre from $292

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 11/17. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Boston to Porto Alegre

Cheap round-trip flights

Enter your travel dates to find the best prices.
LATAM Airlines Logo
3:50 pm - 5:00 pmBOS-POA
24h 10m2 stops
LATAM Airlines Logo
6:40 am - 11:29 pmPOA-BOS
17h 49m2 stops
$581LATAM Airlines
Find Deal
Tue, Mar 24 - Thu, Mar 26
LATAM Airlines Logo
3:50 pm - 5:00 pmBOS-POA
24h 10m2 stops
LATAM Airlines Logo
6:40 am - 11:29 pmPOA-BOS
17h 49m2 stops
$649LATAM Airlines
Find Deal
Tue, Mar 24 - Thu, Mar 26
GOL Logo
9:00 am - 9:45 amBOS-POA
23h 45m2 stops
GOL Logo
11:20 am - 7:15 amPOA-BOS
20h 55m2 stops
$653GOL
Find Deal
Thu, Apr 23 - Wed, Apr 29
Copa Airlines Logo
8:44 am - 12:25 amBOS-POA
14h 41m1 stop
Copa Airlines Logo
1:45 am - 11:03 pmPOA-BOS
22h 18m1 stop
$697Copa Airlines
Find Deal
Wed, Mar 25 - Wed, Apr 1
Multiple Airlines Logo
9:55 am - 12:50 pmBOS-POA
25h 55m2 stops
Multiple Airlines Logo
1:35 pm - 7:15 amPOA-BOS
42h 40m2 stops
$733Multiple Airlines
Find Deal
Wed, Mar 25 - Thu, Apr 2
Copa Airlines Logo
8:31 am - 12:30 amBOS-POA
14h 59m1 stop
Copa Airlines Logo
1:45 am - 2:39 pmPOA-BOS
13h 54m1 stop
$804Copa Airlines
Find Deal
Thu, Apr 23 - Tue, Apr 28
Multiple Airlines Logo
11:15 am - 4:30 pmBOS-POA
27h 15m3 stops
Multiple Airlines Logo
6:00 pm - 6:35 amPOA-BOS
38h 35m2 stops
$826Multiple Airlines
Find Deal
Wed, Feb 11 - Thu, Feb 19
Delta Logo
5:00 pm - 2:05 pmBOS-POA
20h 05m2 stops
Delta Logo
5:55 pm - 7:35 amPOA-BOS
14h 40m1 stop
$1,166Delta
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Tue, Mar 24 - Thu, Mar 26
Delta Logo
5:00 pm - 2:05 pmBOS-POA
20h 05m2 stops
Delta Logo
5:55 pm - 7:35 amPOA-BOS
14h 40m1 stop
$1,167Delta
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Tue, Mar 24 - Thu, Mar 26
GOL Logo
6:19 pm - 11:45 pmBOS-POA
27h 26m2 stops
GOL Logo
5:20 pm - 11:50 amPOA-BOS
20h 30m2 stops
$1,839GOL
Find Deal
Sat, Dec 20 - Thu, Jan 1

LATAM Airlines flights from Boston to Porto Alegre

Our best LATAM Airlines deals on Boston to Porto Alegre flight tickets
LATAM Airlines
Mar 24
BOS3:50 pmBoston Logan Intl
24h 10m
2 stops
POA5:00 pmPorto Alegre Salgado Filho
Mar 26
POA6:40 amPorto Alegre Salgado Filho
17h 49m
2 stops
BOS11:29 pmBoston Logan Intl
$581
Find similar
LATAM Airlines
Mar 24
BOS3:50 pmBoston Logan Intl
24h 10m
2 stops
POA5:00 pmPorto Alegre Salgado Filho
Mar 26
POA6:40 amPorto Alegre Salgado Filho
17h 49m
2 stops
BOS11:29 pmBoston Logan Intl
$649
Find similar
LATAM Airlines
Jan 29
BOS8:55 amBoston Logan Intl
25h 00m
2 stops
POA11:55 amPorto Alegre Salgado Filho
Feb 11
POA11:00 amPorto Alegre Salgado Filho
21h 35m
2 stops
BOS6:35 amBoston Logan Intl
$713
Find similar

Copa Airlines flights from Boston to Porto Alegre

Our best Copa Airlines deals on Boston to Porto Alegre flight tickets
Copa Airlines
Mar 25
BOS8:44 amBoston Logan Intl
14h 41m
1 stop
POA12:25 amPorto Alegre Salgado Filho
Apr 1
POA1:45 amPorto Alegre Salgado Filho
22h 18m
1 stop
BOS11:03 pmBoston Logan Intl
$697
Find similar
Copa Airlines
Apr 23
BOS8:31 amBoston Logan Intl
14h 59m
1 stop
POA12:30 amPorto Alegre Salgado Filho
Apr 28
POA1:45 amPorto Alegre Salgado Filho
13h 54m
1 stop
BOS2:39 pmBoston Logan Intl
$804
Find similar
Copa Airlines
Apr 15
BOS8:31 amBoston Logan Intl
14h 59m
1 stop
POA12:30 amPorto Alegre Salgado Filho
Apr 22
POA1:45 amPorto Alegre Salgado Filho
22h 18m
1 stop
BOS11:03 pmBoston Logan Intl
$838
Find similar

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 November 5, 2025.
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

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Tue 3/24

3:50 pm-5:00 pm

2 stops24h 10m

Porto Alegre Salgado Filho

Thu 3/26

6:40 am-11:29 pm

2 stops17h 49m

$581

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Tue 3/24

3:50 pm-5:00 pm

2 stops24h 10m

Porto Alegre Salgado Filho

Thu 3/26

6:40 am-11:29 pm

2 stops17h 49m

$649

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Thu 4/23

9:00 am-9:45 am

2 stops23h 45m

Porto Alegre Salgado Filho

Wed 4/29

11:20 am-7:15 am

2 stops20h 55m

$653

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Wed 3/25

8:44 am-12:25 am

1 stop14h 41m

Porto Alegre Salgado Filho

Wed 4/1

1:45 am-11:03 pm

1 stop22h 18m

$697

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Wed 3/25

9:55 am-12:50 pm

2 stops25h 55m

Porto Alegre Salgado Filho

Thu 4/2

1:35 pm-7:15 am

2 stops42h 40m

$733

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Thu 4/23

8:31 am-12:30 am

1 stop14h 59m

Porto Alegre Salgado Filho

Tue 4/28

1:45 am-2:39 pm

1 stop13h 54m

$804

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Wed 2/11

11:15 am-4:30 pm

3 stops27h 15m

Porto Alegre Salgado Filho

Thu 2/19

6:00 pm-6:35 am

2 stops38h 35m

$826

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Tue 3/24

5:00 pm-2:05 pm

2 stops20h 05m

Porto Alegre Salgado Filho

Thu 3/26

5:55 pm-7:35 am

1 stop14h 40m

$1,166

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Tue 3/24

5:00 pm-2:05 pm

2 stops20h 05m

Porto Alegre Salgado Filho

Thu 3/26

5:55 pm-7:35 am

1 stop14h 40m

$1,167

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Sat 12/20

6:19 pm-11:45 pm

2 stops27h 26m

Porto Alegre Salgado Filho

Thu 1/1

5:20 pm-11:50 am

2 stops20h 30m

$1,839

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?

What is the cheapest month to fly to Porto Alegre?

The cheapest month to fly to Porto Alegre from Boston is in June. Flight prices, which tend to average around $486, are often lower during this time because this is during the off-season. If you’re not able to fly to Porto Alegre in June, then May is your next best option. Flight prices from Boston to Porto Alegre during May average around $569.

What is the cheapest day to depart on your flight to Porto Alegre?

Our data shows that Tuesday is the least expensive day to fly to Porto Alegre. Tickets to fly out on this day can be as low as $714. On the other hand, Friday is the most expensive day to depart from Boston because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,701.

What is the cheapest time of day to depart on your flight to Porto Alegre?

Our most recent data shows that the best time of day to fly to Porto Alegre is in the evening. Flights from Boston to Porto Alegre during this time can be as low as $865. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $1,064 on average. Flights to Porto Alegre from Boston at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

How far in advance should I book a flight to Porto Alegre?

You are more likely to see cheaper flights to Porto Alegre from Boston when booking weeks ahead of your departure date. In general, you can expect to find flights to Porto Alegre for around $732 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Porto Alegre from Boston for as low as $550 on momondo.

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

You could potentially save up to 30% 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?

As of November 2025, prices for Boston to Porto Alegre flights are approximately 13% cheaper when compared to flights at the same time last year.

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

Direct flights

None
There are no direct flights from Boston to Porto Alegre. There are no popular flight routes from Boston to Porto Alegre.
Search flight deals

  • 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 13h 45m, 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
United AirlinesPriceFrom $334Free CancellationRating
7.4
9,004 reviews
Search United Airlines flights
Copa AirlinesPriceFrom $486Free CancellationRating
7.6
1,561 reviews
Search Copa Airlines flights
DeltaPriceFrom $498Free CancellationRating
7.9
8,004 reviews
Search Delta flights
LATAM AirlinesPriceFrom $501Free CancellationRating
7.5
1,874 reviews
Search LATAM Airlines flights
American AirlinesPriceFrom $510Free CancellationRating
7.2
11,042 reviews
Search American Airlines flights
GOLPriceFrom $712Free CancellationRating
7.3
1,123 reviews
Search GOL 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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