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Cheap flights from Boston to Porto Alegre from $327

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 10/22. 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

Delta Logo
9:55 am - 12:25 amBOS-POA
13h 30m1 stop
Delta Logo
3:15 pm - 7:35 amPOA-BOS
17h 20m1 stop
$620Delta
Find Deal
Thu, Sep 18 - Sat, Sep 27
LATAM Airlines Logo
9:59 am - 6:25 amBOS-POA
19h 26m2 stops
LATAM Airlines Logo
4:40 am - 11:26 pmPOA-BOS
19h 46m2 stops
$625LATAM Airlines
Find Deal
Fri, Sep 12 - Fri, Sep 19
Delta Logo
9:55 am - 12:25 amBOS-POA
13h 30m1 stop
Delta Logo
6:40 am - 11:02 pmPOA-BOS
17h 22m2 stops
$630Delta
Find Deal
Thu, Sep 18 - Sat, Sep 27
LATAM Airlines Logo
10:10 am - 6:25 amBOS-POA
19h 15m2 stops
LATAM Airlines Logo
8:00 pm - 11:59 pmPOA-BOS
28h 59m2 stops
$639LATAM Airlines
Find Deal
Fri, Aug 22 - Mon, Aug 25
LATAM Airlines Logo
9:55 am - 12:25 amBOS-POA
13h 30m1 stop
LATAM Airlines Logo
10:40 am - 7:35 amPOA-BOS
21h 55m2 stops
$640LATAM Airlines
Find Deal
Thu, Sep 18 - Sat, Sep 27
LATAM Airlines Logo
9:59 am - 6:25 amBOS-POA
19h 26m2 stops
LATAM Airlines Logo
5:45 pm - 7:35 amPOA-BOS
14h 50m1 stop
$645LATAM Airlines
Find Deal
Fri, Sep 12 - Fri, Sep 19
Copa Airlines Logo
8:41 am - 12:20 amBOS-POA
14h 39m1 stop
Copa Airlines Logo
1:30 am - 11:02 pmPOA-BOS
22h 32m1 stop
$675Copa Airlines
Find Deal
Sun, Sep 14 - Sun, Oct 26
Copa Airlines Logo
8:41 am - 12:20 amBOS-POA
14h 39m1 stop
Copa Airlines Logo
1:27 am - 7:22 pmPOA-BOS
18h 55m1 stop
$770Copa Airlines
Find Deal
Thu, Sep 18 - Fri, Sep 26
Air Canada Logo
6:30 pm - 2:35 pmBOS-POA
19h 05m2 stops
Air Canada Logo
5:55 pm - 10:37 pmPOA-BOS
29h 42m2 stops
$1,917Air Canada
Find Deal
Tue, Sep 16 - Tue, Oct 28
Air Canada Logo
6:00 am - 2:35 pmBOS-POA
31h 35m2 stops
Air Canada Logo
3:10 pm - 9:27 pmPOA-BOS
31h 17m2 stops
$1,936Air Canada
Find Deal
Tue, Sep 16 - Sun, Oct 26

Delta flights from Boston to Porto Alegre

Our best Delta deals on Boston to Porto Alegre flight tickets
Delta
Sep 18
BOS9:55 amBoston Logan Intl
13h 30m
1 stop
POA12:25 amPorto Alegre Salgado Filho
Sep 27
POA3:15 pmPorto Alegre Salgado Filho
17h 20m
1 stop
BOS7:35 amBoston Logan Intl
$620
Find similar
Delta
Sep 18
BOS9:55 amBoston Logan Intl
13h 30m
1 stop
POA12:25 amPorto Alegre Salgado Filho
Sep 27
POA6:40 amPorto Alegre Salgado Filho
17h 22m
2 stops
BOS11:02 pmBoston Logan Intl
$630
Find similar
Delta
Aug 3
BOS9:55 amBoston Logan Intl
13h 45m
1 stop
POA12:40 amPorto Alegre Salgado Filho
Aug 28
POA7:20 amPorto Alegre Salgado Filho
37h 48m
2 stops
BOS8:08 pmBoston Logan Intl
$1,062
Find similar

LATAM Airlines flights from Boston to Porto Alegre

Our best LATAM Airlines deals on Boston to Porto Alegre flight tickets
LATAM Airlines
Sep 12
BOS9:59 amBoston Logan Intl
19h 26m
2 stops
POA6:25 amPorto Alegre Salgado Filho
Sep 19
POA4:40 amPorto Alegre Salgado Filho
19h 46m
2 stops
BOS11:26 pmBoston Logan Intl
$625
Find similar
LATAM Airlines
Aug 22
BOS10:10 amBoston Logan Intl
19h 15m
2 stops
POA6:25 amPorto Alegre Salgado Filho
Aug 25
POA8:00 pmPorto Alegre Salgado Filho
28h 59m
2 stops
BOS11:59 pmBoston Logan Intl
$639
Find similar
LATAM Airlines
Sep 18
BOS9:55 amBoston Logan Intl
13h 30m
1 stop
POA12:25 amPorto Alegre Salgado Filho
Sep 27
POA10:40 amPorto Alegre Salgado Filho
21h 55m
2 stops
BOS7:35 amBoston Logan Intl
$640
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 July 29, 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

Thu 9/18

9:55 am-12:25 am

1 stop13h 30m

Porto Alegre Salgado Filho

Sat 9/27

3:15 pm-7:35 am

1 stop17h 20m

$620

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Fri 9/12

9:59 am-6:25 am

2 stops19h 26m

Porto Alegre Salgado Filho

Fri 9/19

4:40 am-11:26 pm

2 stops19h 46m

$625

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Thu 9/18

9:55 am-12:25 am

1 stop13h 30m

Porto Alegre Salgado Filho

Sat 9/27

6:40 am-11:02 pm

2 stops17h 22m

$630

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Fri 8/22

10:10 am-6:25 am

2 stops19h 15m

Porto Alegre Salgado Filho

Mon 8/25

8:00 pm-11:59 pm

2 stops28h 59m

$639

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Thu 9/18

9:55 am-12:25 am

1 stop13h 30m

Porto Alegre Salgado Filho

Sat 9/27

10:40 am-7:35 am

2 stops21h 55m

$640

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Fri 9/12

9:59 am-6:25 am

2 stops19h 26m

Porto Alegre Salgado Filho

Fri 9/19

5:45 pm-7:35 am

1 stop14h 50m

$645

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Sun 9/14

8:41 am-12:20 am

1 stop14h 39m

Porto Alegre Salgado Filho

Sun 10/26

1:30 am-11:02 pm

1 stop22h 32m

$675

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Thu 9/18

8:41 am-12:20 am

1 stop14h 39m

Porto Alegre Salgado Filho

Fri 9/26

1:27 am-7:22 pm

1 stop18h 55m

$770

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Tue 9/16

6:30 pm-2:35 pm

2 stops19h 05m

Porto Alegre Salgado Filho

Tue 10/28

5:55 pm-10:37 pm

2 stops29h 42m

$1,917

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Tue 9/16

6:00 am-2:35 pm

2 stops31h 35m

Porto Alegre Salgado Filho

Sun 10/26

3:10 pm-9:27 pm

2 stops31h 17m

$1,936

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 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 September is your next best option. Flight prices from Boston to Porto Alegre during September average around $527.

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.

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

You could potentially save up to 14% 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 July 2025, prices for Boston to Porto Alegre flights are approximately 33% 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

Best Price Found

$327

Fastest flight time

13h 30m

Direct flights

None

Airports in Porto Alegre

1 airport
The best one-way flight to Porto Alegre from Boston in the past 72 hours is $327. The best round-trip flight deal from Boston to Porto Alegre found on momondo in the last 72 hours is $620.
The fastest flight from Boston to Porto Alegre takes 13h 30m
There are no direct flights from Boston to Porto Alegre. Popular non-direct route for this connection is Boston Logan Intl Airport - Porto Alegre Salgado Filho Airport.
There is 1 airport near Porto Alegre: Porto Alegre Salgado Filho (POA)
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  • 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 30m, 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
DeltaPriceFrom $291Free CancellationRating
8.0
7,979 reviews
Search Delta flights
Copa AirlinesPriceFrom $450Free CancellationRating
7.5
1,493 reviews
Search Copa Airlines flights
LATAM AirlinesPriceFrom $501Free CancellationRating
7.5
1,822 reviews
Search LATAM Airlines flights
American AirlinesPriceFrom $510Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
GOLPriceFrom $712Free CancellationRating
7.3
1,091 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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