BOS - POA

$316 Find Cheap Flights from Boston to Porto Alegre

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Boston to Porto Alegre departing on 4/5. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Porto Alegre

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to Porto Alegre.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to Porto Alegre.
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Everything you should know

Cheapest round-trip
$669
Overall average: $708
United Airlines
Tue 3/17Thu 3/19
BOS - POA • 2 stops
Cheapest one-way
$316
Typical prices: $358-$428
United Airlines
Sun 4/5
BOS - POA • 2 stops
Top airlines
United Airlines
Cheapest • from $669 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
June
Cheapest • 39% price drop
October
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Boston to Porto Alegre (BOS-POA)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Boston to Porto Alegre that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Boston to Porto Alegre

Tue, Mar 17 - Thu, Mar 19
United Airlines Logo
12:10 pm - 2:25 pm
BOS
-
POA
25h 15m
2 stops
United Airlines Logo
3:30 pm - 9:54 pm
POA
-
BOS
31h 24m
2 stops
$669United Airlines
Tue, Mar 17 - Thu, Mar 19
United Airlines Logo
11:02 am - 2:25 pm
BOS
-
POA
26h 23m
2 stops
United Airlines Logo
3:30 pm - 9:56 am
POA
-
BOS
19h 26m
2 stops
$670United Airlines
Sun, Mar 1 - Sat, Mar 14
LATAM Airlines Logo
10:03 am - 6:30 am
BOS
-
POA
18h 27m
2 stops
LATAM Airlines Logo
5:00 am - 1:09 am
POA
-
BOS
21h 09m
2 stops
$754LATAM Airlines
Tue, Mar 17 - Thu, Mar 19
United Airlines Logo
12:07 pm - 2:25 pm
BOS
-
POA
25h 18m
3 stops
United Airlines Logo
3:30 pm - 9:56 am
POA
-
BOS
19h 26m
2 stops
$817United Airlines
Sun, Feb 22 - Sat, Mar 7
LATAM Airlines Logo
8:59 pm - 2:05 pm
BOS
-
POA
39h 06m
2 stops
LATAM Airlines Logo
6:40 am - 9:04 am
POA
-
BOS
28h 24m
2 stops
$945LATAM Airlines
Sat, Feb 21 - Mon, Mar 2
Multiple Airlines Logo
6:53 pm - 5:00 pm
BOS
-
POA
44h 07m
2 stops
Multiple Airlines Logo
5:55 pm - 10:15 am
POA
-
BOS
18h 20m
2 stops
$973Multiple Airlines
Sun, Mar 1 - Sat, Mar 14
Multiple Airlines Logo
5:50 pm - 12:25 am
BOS
-
POA
52h 35m
2 stops
Multiple Airlines Logo
8:10 pm - 7:35 am
POA
-
BOS
36h 25m
1 stop
$1,098Multiple Airlines
Sat, Feb 21 - Mon, Mar 2
United Airlines Logo
4:25 pm - 4:20 pm
BOS
-
POA
45h 55m
2 stops
United Airlines Logo
3:25 pm - 12:46 pm
POA
-
BOS
47h 21m
3 stops
$1,219United Airlines
Sat, Feb 21 - Mon, Mar 2
Multiple Airlines Logo
5:50 pm - 5:00 pm
BOS
-
POA
45h 10m
2 stops
Multiple Airlines Logo
8:45 pm - 6:35 am
POA
-
BOS
35h 50m
1 stop
$1,403Multiple Airlines
Sun, Feb 22 - Fri, Mar 6
Copa Airlines Logo
7:31 am - 12:25 am
BOS
-
POA
14h 54m
1 stop
Copa Airlines Logo
1:30 am - 10:10 pm
POA
-
BOS
22h 40m
1 stop
$1,533Copa Airlines
Booking Insights

KAYAK's insights & trends for Boston to Porto Alegre flights

Get data-powered insights and trends into flights from Boston to Porto Alegre to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Boston to Porto Alegre?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Boston to Porto Alegre, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Boston to Porto Alegre is June, where tickets cost $486 (return) on average. On the other hand, the most expensive months are December and August, where the average cost of round-trip tickets is $1,571 and $1,033 respectively.

Good to know

Low seasonAugust
Cheapest flight$316
Best time to beat the crowds but there is an average 29% increase in price.
Most popular time to fly and prices are also 15% lower on average.
Flight from Boston to Porto Alegre

When to book flights from Boston to Porto Alegre

Are your dates flexible? Find out the best times to travel from Boston to Porto Alegre based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Boston to Porto Alegre

  • What is the cheapest flight from Boston to Porto Alegre?

    In the last 3 days, the lowest price for a flight from Boston to Porto Alegre was $316 for a one-way ticket and $669 for a round-trip.

  • Do I need a passport to fly between Boston and Porto Alegre?

    Yes, you’ll need a passport to travel to Porto Alegre from Boston.

  • Which aircraft models fly most regularly from Boston to Porto Alegre?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Boston to Porto Alegre?

    oneworld, SkyTeam, and Star Alliance are the airline alliances operating flights between Boston and Porto Alegre, with oneworld being the most commonly used for this route.

  • Which is the best airline for flights from Boston to Porto Alegre, Delta or LATAM Airlines?

    The two airlines most popular with KAYAK users for flights from Boston to Porto Alegre are Delta and LATAM Airlines. With an average price for the route of $758 and an overall rating of 7.9, Delta is the most popular choice. LATAM Airlines is also a great choice for the route, with an average price of $750 and an overall rating of 7.5.

  • How does KAYAK find such low prices on flights from Boston to Porto Alegre?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Boston to Porto Alegre.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Boston to Porto Alegre?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Porto Alegre from Boston is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Boston to Porto Alegre?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Porto Alegre with an airline and back to Boston with another airline. Booking your flights between Boston and POA can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Boston to Porto Alegre?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Porto Alegre from Boston up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 5 airlines serving from Boston to Porto Alegre

 
See real verified KAYAK customer reviews for airlines flying from Boston to Porto Alegre. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Boston to Porto Alegre? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
DeltaOverall score based on 8119 reviews
8.1Boarding
7.2Food
8.5Crew
7.8Entertainment
7.9Comfort
Airline reviews

The flight was comfortable and uneventful, which is what I desire

8.0 ExcellentLarry, Jan 2026
JFK - SJD
Read more Delta reviews

The flight was comfortable and uneventful, which is what I desire

The service from the flight attendants were of supreme quality. They greeted and treated everyone with a wide smile. This is totally absent nowadays. Kudos to them!!!!

Excellent flight and got us around tough weather. Only issue was seat TV did not work and crew tried to reboot.

Very large passenger too space from my own seat. Arm board couldn’t be lowered because of his size. It wads very uncomfortable trip, as the flight was full couldn’t move anywhere having back pain because of the position in which I was the entire flight.

was sitting in the jet bridge for 10 minutes in -20 degree weather waiting for my bag

Outdated equipment in disrepair, wifi inoperable. Broken seats, taped air vents, generally poor condition, the 717 showed its age and lack of upkeep.

My flight out of Baton Rouge to Atlanta was delayed by a half hour. This got us into Atlanta airport 30 minutes late. I ran through the airport to get to my connecting flight. As I approached the boarding gate, I saw the boarding door was still open and a passenger was being checked in. But when I got to the gate, the boarding agent told me they had already given away my seat and there were no empty seats on that flight. So I had to take a later flight. That has never happened to me before. Very frustrating.

Connection through Atlanta was difficult. Mechanical issue on plane caused a two hour delay. New gate was a mile away.

No WiFi. Comfort plus should have alcohol provided, crew only offered water or tea. Who the heck wants tea?

The flight was delayed and oversold. I volunteered to give up my seat for compensation. Thinking I could get a good night's sleep instead of arriving home at 2 am. It took over an hour to get the new reservation confirmed, three different gate attendants, and two red coats. It took even longer to confirm the overnight hotel, and when I arrived, the line was 45 minutes long, with two people checking in, and at least 15 people slowly, very slowly—no food except frozen convenience food, no coupon for food from airlines. Slept, headed back to the airport, and that flight had an equipment change and a gate change just as they were about to board. It took an additional hour to board as they cleaned the plane from storage.

Seats were awful. Media should have been included for such a long flight.

A lot things happened in this trip.The fly should be less stress.

Horrible. No TV or any type of entertainment on board. Passwnger listening to/watching stuff on their own phone with no headphones making it noise and uncomfortable for everyone else, little/tiny food portions, old seats, useless wifi (cant access anything). Horrible exlerience especially it was a lomg distance flight with kids.

There should be a warning regarding the quality of the aircraft on the website as we reserve the tickets. There was no TV or any type of screen onboard. The wifi they offer is good for nothing. Traveling 9 hours straight with kids and no type of entetainment was horrible. I wish I had been informed prior so I could buy a ticket with another airline. The food was a joke too. A very tiny portion per passenger. They also charged $100 per checked bag. With United I used to pay $60. So, fair to say that I wont be flying Copa anymore. Their aircraft was super old, outdated, no entertainment, with nearly no onboard food.

The flight was good overall. Everything went smoothly, although the landing was a bit rough. Still, it was a pleasant experience

Very strict carry on rules meant most of the plane had to gate check their luggage. As is often the case had things that were broken because of this, but I appreciated not being charged to gate check. Otherwise good flight and great crew once on the plane

Some of the Air hostesses are not that friendly. Need improvement

I liked the meatloaf the chicken was awful but the plane was on time and got there and the staff was nice.

They were super friendly bumped me up to exit row free of charge, All flight legs were on time

Boarding was quick & efficient; they gave boarding groups due priority; staff & air crew were very cordial and helpful, pleasant flight.

There was a mechanical issue with the plane that they had to work on before we could take off. That's fine, by all means, PLEASE make sure the mechanics are functioning properly. What was a problem was the fact that we sat on the tarmac for 4.5 hours without moving, without letting us off the plane, and without climate control and air running through the plane. There was no explanation as to what was going on; they just kept promising that it would be "15 minutes, then we are on our way." At one point, they even switched the entire crew out and told everyone we just needed to wait for new employees to show up. Then, as the 4 hours were not moving, an hour before the full refund, they made a big show about "the flight starting and the doors are locked, so you have to sit down." We didn't move for another 40 minutes; they were just trying to skirt around legalities that entitled us to restitution. When the flight finally was underway, the plane was gigantic but cramped in design, my entertainment screen kept freezing and glitching, and subtitles didn't work, and the crew was passive-aggressive. Terrible flight.

We traveled with two young children, and it was not possible for our family to be seated together. No one offered help or assistance to organize seating so we could sit with our kids. In the end, we managed to find two seats in Economy so I could at least sit with one of them, even though I had originally paid for Comfort+. In summary, I had to downgrade my seat just to be able to sit with one of my children, which was very disappointing

I booked a flight through Kayak to Brazil I have traveled to Brazil several times before Kayak Delta or LATAM never mentioned during the booking or in the pre flight process that the visa requirements to visit Brazil have changed earlier this year. I was unaware of this change and as such never got a visa and was unable to fly from JFK to Sao Paulo Add to this that Delta allowed me to fly from Boston to JFK which they should not have as I didn’t have a visa. It has been a terrible experience and a huge loss of money

Latam may be the worst airline in the world, far worse than even the lowest of low cost airlines in the USA. I wasted hours trying to PAY THEM TO CHECK A BAG! Then they misled me at the terminal, sent me through the wrong security line, the list goes on and on... Just absolutely terrible in every way. Avoid at all costs.

Poor, the airline was not able to help me move flights.

The way the Pilot made all announcements, specially the way he congratulated the entire crew as the best team ever, making a comment that due to them they were able to shorter the delay to the destination. Amazing flight .

Just to drop my already labeled bag it took 50 minutes inline. Completely disappointed with Latam operation at GRU

I’m entitled to a refund per LATAM due to the mid flight itinerary change and being stuck in São Paulo for 24 hours and needing to get a hotel. The airline was dismissive and of no help.

The flight was late. Please do not delay next time.

I couldn't travel, now I can't get a refund and to change the date I have to pay an absurd fine.

The pilots landing and taking off was very bad on the first flight, the second one taking off was great but landing was also rough

The check in and on the ground experience is very poor. Their online check and trip management is the worst I have ever seen and they have long lines to check in at the airport, technology is glitchy/unusable and have exorbitant baggage fees. The flight itself is fine, although the food is about what you would expect and their was no functioning entertainment for an international flight.

My experience with this flight was extremely negative and resulted in serious financial and personal consequences. The flight departed with a significant delay, which caused me to miss my international connecting flight. As a direct result of this delay — which was entirely beyond my control — I was unable to reach my final destination on time, causing me to lose a previously scheduled hair transplant surgery that had been arranged months in advance. This was not a minor inconvenience. The surgery involved: • A reserved operating room • Medical and technical staff scheduled specifically for that date • Surgical instruments prepared in advance • Strict scheduling that does not allow for easy rescheduling Due to the airline’s delay and poor handling of the situation: • I lost already paid international flight tickets • I was forced to purchase new tickets, incurring duplicate expenses • I spent over six additional hours in airports, under stressful conditions • I incurred unexpected costs for meals and transportation • I lost a medical opportunity that cannot be easily recovered, along with the emotional distress associated with it Although the airline covered one night of hotel accommodation, this did not address the real impact of the delay, nor the significant damages caused by missing a critical medical procedure. The lack of punctuality, planning, and effective solutions reflects a serious lack of responsibility toward passengers, especially when international connections and time-sensitive medical commitments are involved. I do not recommend this airline for travelers with important schedules, medical appointments, or critical connections. In my case, the delay did not merely cause inconvenience — it resulted in the loss of a surgery and substantial financial damage.

I was not able to get on the flight due to delays out of Philadelphia. I arrived in MIA at 10:30pm and there was no one at the GOL Desk. Is there any flight credit available for this flight?

I have a hand injury and the flight attendant denied to help me with luggage, she said "she couldn't help me because I should manage my own way to put the luggage on the plane" SO RUDE

I had two around 6 hours flight and they did not even offer water to us.

Overall it was good. The food was not great quality and seats were very uncomfortable. But overall the staff was very friendly and helpful.

We flew with Avianca, some how they are not n sync, making the process a bit uncomfortable.

Unfortunately it was very disappointed experience. Our first flight our was delayed 2 hours, as a consequence we missed our connecting international flight. Customer server at Miami American Airlines was very disrespectful, gave us the worst replace itenarary for the next day that we had to spend 2 hours calling Gol to get a better itinerary otherwise we wouldn't make it on time to fulfill our trip purpose. We would have missed the reason to travel all the way to Brazil if we didn't change for a better itinerary. The worst thing is that our baggage was missing for 4 days. We had no cloths for all this time, plus the aggravation to locate our baggage. Nobody knew where our baggage was. We ended up picking it up at the airport when they said that they will bring them home. Unfortunately our experience was very dissatisfied.

Flight on time, check in and flight attendants courteous and helpful. Smaller plane for international flights, tight space, no comfortable.

The plane was experiencing problems with the HVAC system, it was very cold in the front of the plane and very hot in the back.

My flight to London from Philadelphia was cancelled due to weather.

The attendants were kind and helpful. A sugar-free drink would have been very welcome.

Pilot navigated severe weather/snow storm with skill. Described his intentions clearly

one crew said "he" didn't serve double alcohol drinks for travelers in exit rows. crew on prior flight did. Is this a AA rule, and the prior crew was being nice? Also, I think we deserve more than a 25% refund for losing first class seats when rescheduling a flight due to weather

It was a little concerning to hear the ground crew arguing with the flight crew over baggage space. Instead of taking them and checking them, they started checking for space in the first class cabin moving items around like the flight crew didn't know what they were doing. I was embarrassed for them.

2 hour delay due to equipment failure. No updates via the app and airport screens (which continued to show a departure time in the past). AA eventually switched planes and the new plane was not catered or cleaned correctly.

I booked an aisle seat and was given a middle. At 6'4" 230lbs, it is not ideal to fly in the middle row for myself and passengers.

Trip delayed for 2 hours because of rain. We boarded and have to get down the flight and reboard again.

The aircraft had several problems - from excess fuel to non operational ac. Two hours of delay in Chicago could have been avoided with proper planning and aircraft maintenance.

Everything you need to know for your flight from Boston to Porto Alegre

Information on your arrival and departure airports