BOS - POA

$554 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 12/27. 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
$554
Overall average: $678
United Airlines
Mon 3/16Thu 3/26
BOS - POA • 2 stops
Cheapest one-way
$399
Typical prices: $599-$1,334
LATAM Airlines
Sat 12/27
BOS - POA • 2 stops
Top airlines
United Airlines
Cheapest • from $554 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
2 weeks
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 63% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
June
Cheapest • 34% price drop
September
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Porto Alegre!
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

Mon, Mar 16 - Thu, Mar 26
United Airlines Logo
10:57 am - 2:35 pmBOS-POA
26h 38m2 stops
United Airlines Logo
3:25 pm - 11:48 pmPOA-BOS
33h 23m2 stops
$554United 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
4:45 am - 11:29 pmPOA-BOS
19h 44m2 stops
$581LATAM Airlines
Find Deal
Mon, Nov 24 - Sun, Dec 7
Copa Airlines Logo
7:34 am - 12:30 amBOS-POA
14h 56m1 stop
Copa Airlines Logo
1:35 am - 10:40 pmPOA-BOS
23h 05m1 stop
$638Copa Airlines
Find Deal
Tue, Mar 24 - Thu, Mar 26
LATAM Airlines Logo
7:00 am - 5:00 pmBOS-POA
33h 00m2 stops
LATAM Airlines Logo
6:40 am - 11:29 pmPOA-BOS
17h 49m2 stops
$649LATAM Airlines
Find Deal
Tue, Mar 17 - Mon, Mar 30
GOL Logo
8:55 am - 9:55 amBOS-POA
24h 00m2 stops
GOL Logo
5:10 am - 11:09 pmPOA-BOS
18h 59m2 stops
$728GOL
Find Deal
Tue, Mar 17 - Sun, Mar 29
Copa Airlines Logo
8:44 am - 12:25 amBOS-POA
14h 41m1 stop
Copa Airlines Logo
1:30 am - 11:05 pmPOA-BOS
22h 35m1 stop
$784Copa Airlines
Find Deal
Sun, Nov 16 - Wed, Dec 24
Delta Logo
6:45 am - 6:30 amBOS-POA
21h 45m2 stops
Delta Logo
6:05 pm - 6:35 amPOA-BOS
14h 30m1 stop
$971Delta
Find Deal
Tue, Dec 23 - Thu, Jan 1
Delta Logo
6:40 am - 2:05 pmBOS-POA
29h 25m2 stops
Delta Logo
7:45 am - 10:19 amPOA-BOS
28h 34m2 stops
$1,887Delta
Find Deal
Sun, Nov 16 - Wed, Dec 24
American Airlines Logo
2:59 pm - 11:00 amBOS-POA
18h 01m2 stops
American Airlines Logo
7:20 pm - 1:03 pmPOA-BOS
19h 43m3 stops
$2,022American Airlines
Find Deal
Sun, Dec 21 - Thu, Jan 1
GOL Logo
12:44 pm - 11:30 amBOS-POA
20h 46m2 stops
GOL Logo
5:20 pm - 9:55 amPOA-BOS
18h 35m2 stops
$2,024GOL
Find Deal
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’s the cheapest day of the week to fly from Boston to Porto Alegre?

The average price of all round-trip flights from Boston to Porto Alegre clicked on KAYAK for each day over the last 12 months.

If your flying dates are flexible, you should consider flying to Porto Alegre on a Tuesday, as we generally find the cheapest rates on that day for this route. On the other hand, Friday is the most expensive day to fly from Boston to Porto Alegre. For your return ticket, we recommend flying on a Wednesday and avoiding Saturdays for the best deals.

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 August and December, where the average cost of round-trip tickets is $1,033 and $986 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure 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 average of all the values for each week.

To get a below average price on the flight from Boston to Porto Alegre, you should book around 2 weeks before departure, which saves you about 63% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 19 weeks before departure.

Good to know

Low seasonAugust
Cheapest flight$399
Best time to beat the crowds but there is an average 41% increase in price.
Most popular time to fly and prices are also 10% 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 $399 for a one-way ticket and $554 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?

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

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

    The two airlines most popular with KAYAK users for flights from Boston to Porto Alegre are Delta and Copa Airlines. With an average price for the route of $688 and an overall rating of 7.9, Delta is the most popular choice. Copa Airlines is also a great choice for the route, with an average price of $697 and an overall rating of 7.6.

  • 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 7995 reviews
7.3Food
8.2Boarding
7.9Entertainment
7.9Comfort
8.5Crew
Airline reviews

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

8.0 ExcellentJulie, Oct 2025LAX - SFO
Read more Delta reviews

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

They ended up paying for the bag twice, but the counter wouldn't take my baggage receipt. Left it to me to resolve. Not sure how to resolve the issue.

The customer service before board was very rude and when I expressed my concerns about making the connecting flight she laughed and told me I bought the wrong ticket. I explained once it showed the flight was delayed it no longer let me change seats or anything. I was trying to upgrade to make sure I would get to the next gate on time.

Non stop on long haul is the way to go. Great experience

The aircraft interior is old and tired on this aircraft. The entertainment system never worked despite the crews attempt to reset the system.

The flight used a B767 with a very old interior from before 2014. The entertainment system did not work at all during the flight despite attempts to reset the system. It was like they flew this route just to be competitive.

Old plane and old configuration/seats but still comfortable for a morning flight

They changed planes and the new plane couldn’t carry enough fuel to fly across the country so we had to stop in Kansas City to refuel. Flight was delayed .

Flight was too crowded and seats are too small, especially since passengrs are getting larger. Having a middle seat is ALWAYS tough! Woman on my left was large & kept creeping in to my space. Flight personnel were great! Have more savory rather than sweet snacks please.

Flight was crowded and the woman sitting on my left was large & kept crouching in to my space. You need bigger seats or smaller passengers to fit into the seats you DO have! Snack were OK. Would appreciate if airlines had more savory rather than sweet snacks, thank you!

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.

Cops Airlines is fantastic! The level of care and professionalism provided by the entire crew was top rate.

We had a great flight just wished they had a tv so we can see a movie that would of made my trip excellent.

Great experience with a crew always thinking in the passenger

Very happy with my flight. I would definitely recommend it.

Did upgrade, travel in business it was great (more room I could sleep)

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.

Boarding was confusing with a delayed flight because there was no English translation

My biggest complaint is the comfort. I am not tall and there was no legroom. It was very uncomfortable. During my transfer in Sao Paola, the flight was slightly delayed so boarding was confusing because there were no instructions in English.

Bought a ticket that included a bag and they still charged me to check it in, latam is the worst airline.

I never got this flight. You sent me to Chile!!! And from Chile I got the other flight to São Paulo... I've arrived 7h latter than I was supposed to arrive because of Delta delays.

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 boarding staff were incredibly officious. our carry-on case was borderline within dimensions but staff were not prepared to show ANY flexibility even though many others with larger carry-on luggage were allowed to board. we were understandably furious but the staff were incredibly disrespectful. we called the supervisor who eventually agreed to look on board the plane to see if there was room for our case (one case between 2 of us) and reluctantly agreed to allow us on. The staff on board were excellent though and realized we had been treated badly and were very helpful both in finding a place for our case, some distance from our seats, and helping us to retrieve it when we landed. We are regular travelers on Gol and have Diamante status and had chosen the better Conforto + seats, so we expected better treatment from the ground staff. Also the cabins are of a size that will only fit 3 cases of normal size with a large gap of about 30cm of wasted space. If our case were deemed to be oversize, which I dispute, the extra 1cm would not have made the slightest difference.

I did not like the way that baggage fees were charged. When I signed up for the flight, I knew that there were bag fees. However, the bag fees were so confusing that it felt like I was paying for overweight bags rather than just for having brought a bag with me. Also, the bag fees were based on the pair of tickets rather than per person. It seems to me that it should be first bag fee for passenger 1 and then first bag fee for passenger 2. I eventually got away with only paying $100 for two bags, but it was a struggle to understand the process. As for the flight, the seats were the standard uncomfortable seats that are on most Boeing aircraft. The airline aims to accommodate the standard height people, so us tall people are stuck. There was never an option to upgrade for leg room. It did not appear that there were any seats on the whole plane that had a little more leg room to even try to get. Other than that, I completely ignored the food for this red eye flight. I am not one to eat "dinner" at 2 am. They did not offer any drinks in the morning before landing. I recommend that you bring a bottle of water on board.

Lost luggage, people are not very nice to help you , I was just instructed to fill out a baggage claim online, they were not helpful when I had additional questions after I completed the form on my phone.

They are not ready for international flights, poor service and food, no screen info on the seat.

The flight attendant, a black woman with curly hair who sat near Row 21, was wonderful and kind.

It was good..clean, comfy seat. Friendly warm welcoming crew. Was able to check my cabin luggage at the gate which I was able to pickup in a decent time from baggage claim. The app gave all updates from delays to baggage claim info. Overall smooth flight.

Flight was delayed leaving Dallas. Arrived about 2 hours later than scheduled.

Flight delayed and missed connection. Rescheduled flight cancelled after 6 hrs wait. Rerouted thru ORD, flight cancelled, overnight stay in ORD. Still in the air on new flight!

We are too tired and frustrated to comment politely at this point

Terrible. Our luggage was delayed and couldn’t be delivered for several days. We got bad information from the airline agents at baggage claim. We had to pick up our car so we wouldn’t be charged for an extra day. We got lost in the maze of airport parking. The baggage claim agents didn’t offer us any compensation for our extra time and expense. We are tired, hungry and very frustrated.

The flight was flawless and we even arrived between 20 and 25 minutes early!

The only thing to like was that we eventually got to our destination

Delayed delayed delayed and no offer for food or vouchers

Disliked having to wait a little longer to disembark from the plan when we landed in London

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

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