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Cheap flights from Boston to Porto Alegre from $230

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 3/5. 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
0 bags

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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.
United Airlines Logo
7:34 pm - 4:25 pm
BOS
-
POA
19h 51m
2 stops
United Airlines Logo
3:25 pm - 9:56 am
POA
-
BOS
19h 31m
2 stops
$490United Airlines
Mon, Mar 9 - Wed, Mar 18
United Airlines Logo
7:34 pm - 2:25 pm
BOS
-
POA
17h 51m
2 stops
United Airlines Logo
3:30 pm - 12:35 am
POA
-
BOS
34h 05m
2 stops
$497United Airlines
Tue, Mar 17 - Thu, Mar 19
Copa Airlines Logo
8:43 am - 12:20 am
BOS
-
POA
14h 37m
1 stop
Copa Airlines Logo
1:35 am - 11:09 pm
POA
-
BOS
22h 34m
1 stop
$562Copa Airlines
Thu, Apr 9 - Mon, Apr 27
United Airlines Logo
7:34 pm - 2:25 pm
BOS
-
POA
17h 51m
2 stops
United Airlines Logo
3:30 pm - 7:42 pm
POA
-
BOS
29h 12m
2 stops
$590United Airlines
Tue, Mar 17 - Thu, Mar 19
Copa Airlines Logo
8:43 am - 12:20 am
BOS
-
POA
14h 37m
1 stop
Copa Airlines Logo
1:35 am - 2:34 pm
POA
-
BOS
13h 59m
1 stop
$669Copa Airlines
Thu, Apr 9 - Mon, Apr 27
Multiple Airlines Logo
9:55 am - 12:40 am
BOS
-
POA
13h 45m
1 stop
Multiple Airlines Logo
1:40 pm - 7:35 am
POA
-
BOS
18h 55m
2 stops
$685Multiple Airlines
Mon, Mar 9 - Wed, Mar 18
Avianca Logo
8:45 am - 10:55 am
BOS
-
POA
25h 10m
2 stops
Avianca Logo
6:05 pm - 7:10 am
POA
-
BOS
38h 05m
2 stops
$702Avianca
Thu, Apr 9 - Tue, Apr 28
LATAM Airlines Logo
9:55 am - 11:35 am
BOS
-
POA
24h 40m
1 stop
LATAM Airlines Logo
6:00 pm - 11:10 am
POA
-
BOS
18h 10m
2 stops
$723LATAM Airlines
Mon, Mar 9 - Wed, Mar 18
Delta Logo
9:55 am - 2:05 am
BOS
-
POA
15h 10m
1 stop
Delta Logo
5:50 pm - 1:45 pm
POA
-
BOS
20h 55m
2 stops
$726Delta
Thu, Apr 9 - Tue, Apr 28
United Airlines Logo
12:07 pm - 2:25 pm
BOS
-
POA
25h 18m
3 stops
United Airlines Logo
3:30 pm - 5:17 pm
POA
-
BOS
26h 47m
2 stops
$737United Airlines
Tue, Mar 17 - Thu, Mar 19

Copa Airlines flights from Boston to Porto Alegre

Our best Copa Airlines deals on Boston to Porto Alegre flight tickets
Copa Airlines
Apr 9
BOS8:43 amBoston Logan Intl
14h 37m
1 stop
POA12:20 amPorto Alegre Salgado Filho
Apr 27
POA1:35 amPorto Alegre Salgado Filho
22h 34m
1 stop
BOS11:09 pmBoston Logan Intl
$562
Copa Airlines
Apr 9
BOS8:43 amBoston Logan Intl
14h 37m
1 stop
POA12:20 amPorto Alegre Salgado Filho
Apr 27
POA1:35 amPorto Alegre Salgado Filho
13h 59m
1 stop
BOS2:34 pmBoston Logan Intl
$669
Copa Airlines
Mar 11
BOS4:05 pmBoston Logan Intl
31h 20m
1 stop
POA12:25 amPorto Alegre Salgado Filho
Mar 17
POA1:30 amPorto Alegre Salgado Filho
22h 40m
1 stop
BOS11:10 pmBoston Logan Intl
$774

United Airlines flights from Boston to Porto Alegre

Our best United Airlines deals on Boston to Porto Alegre flight tickets
United Airlines
Mar 9
BOS7:34 pmBoston Logan Intl
17h 36m
2 stops
POA2:10 pmPorto Alegre Salgado Filho
Mar 18
POA3:25 pmPorto Alegre Salgado Filho
19h 31m
2 stops
BOS9:56 amBoston Logan Intl
$490
United Airlines
Mar 17
BOS7:34 pmBoston Logan Intl
17h 51m
2 stops
POA2:25 pmPorto Alegre Salgado Filho
Mar 19
POA3:30 pmPorto Alegre Salgado Filho
34h 05m
2 stops
BOS12:35 amBoston Logan Intl
$497
United Airlines
Mar 17
BOS7:34 pmBoston Logan Intl
17h 51m
2 stops
POA2:25 pmPorto Alegre Salgado Filho
Mar 19
POA3:30 pmPorto Alegre Salgado Filho
29h 12m
2 stops
BOS7:42 pmBoston Logan Intl
$590

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 February 3, 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

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Mon 3/9

7:34 pm-4:25 pm

2 stops19h 51m

Porto Alegre Salgado Filho

Wed 3/18

3:25 pm-9:56 am

2 stops19h 31m

$490

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Tue 3/17

7:34 pm-2:25 pm

2 stops17h 51m

Porto Alegre Salgado Filho

Thu 3/19

3:30 pm-12:35 am

2 stops34h 05m

$497

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Thu 4/9

8:43 am-12:20 am

1 stop14h 37m

Porto Alegre Salgado Filho

Mon 4/27

1:35 am-11:09 pm

1 stop22h 34m

$562

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Tue 3/17

7:34 pm-2:25 pm

2 stops17h 51m

Porto Alegre Salgado Filho

Thu 3/19

3:30 pm-7:42 pm

2 stops29h 12m

$590

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Thu 4/9

8:43 am-12:20 am

1 stop14h 37m

Porto Alegre Salgado Filho

Mon 4/27

1:35 am-2:34 pm

1 stop13h 59m

$669

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Mon 3/9

9:55 am-12:40 am

1 stop13h 45m

Porto Alegre Salgado Filho

Wed 3/18

1:40 pm-7:35 am

2 stops18h 55m

$685

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Thu 4/9

8:45 am-10:55 am

2 stops25h 10m

Porto Alegre Salgado Filho

Tue 4/28

6:05 pm-7:10 am

2 stops38h 05m

$702

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Mon 3/9

9:55 am-11:35 am

1 stop24h 40m

Porto Alegre Salgado Filho

Wed 3/18

6:00 pm-11:10 am

2 stops18h 10m

$723

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Thu 4/9

9:55 am-2:05 am

1 stop15h 10m

Porto Alegre Salgado Filho

Tue 4/28

5:50 pm-1:45 pm

2 stops20h 55m

$726

BostonPorto Alegre

BOS - POA

BOSPOA

Boston Logan Intl

Tue 3/17

12:07 pm-2:25 pm

3 stops25h 18m

Porto Alegre Salgado Filho

Thu 3/19

3:30 pm-5:17 pm

2 stops26h 47m

$737

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 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 May is your next best option. Flight prices from Boston to Porto Alegre during May average around $574.

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

You could potentially save up to 6% 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

15h 10m

Direct flights

None
The fastest flight from Boston to Porto Alegre takes 15h 10m
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 15h 10m, 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 $279Free CancellationRating
7.6
1,558 reviews
Search Copa Airlines flights
United AirlinesPriceFrom $334Free CancellationRating
7.4
9,236 reviews
Search United Airlines flights
DeltaPriceFrom $498Free CancellationRating
7.9
8,139 reviews
Search Delta flights
LATAM AirlinesPriceFrom $515Free CancellationRating
7.5
1,918 reviews
Search LATAM Airlines flights
American AirlinesPriceFrom $551Free CancellationRating
7.2
11,218 reviews
Search American Airlines flights
GOLPriceFrom $712Free CancellationRating
7.3
1,165 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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