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Cheap flights from Boston to Buenos Aires from $258

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 Buenos Aires departing on 11/19. 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 Buenos Aires

Cheap round-trip flights

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LATAM Airlines Logo
5:00 pm - 5:00 pmBOS-AEP
23h 00m2 stops
LATAM Airlines Logo
5:00 pm - 11:29 pmAEP-BOS
31h 29m2 stops
$742LATAM Airlines
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Sun, Apr 5 - Wed, Apr 8
LATAM Airlines Logo
8:50 pm - 8:55 pmBOS-EZE
46h 05m2 stops
LATAM Airlines Logo
9:55 pm - 6:35 amEZE-BOS
34h 40m1 stop
$750LATAM Airlines
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Mon, Dec 8 - Sat, Dec 13
Avianca Logo
7:55 am - 5:50 amBOS-EZE
19h 55m1 stop
Avianca Logo
4:55 pm - 6:35 amEZE-BOS
15h 40m1 stop
$757Avianca
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Thu, Dec 11 - Mon, Dec 15
Avianca Logo
4:25 pm - 3:50 pmBOS-EZE
22h 25m2 stops
Avianca Logo
4:55 pm - 7:35 amEZE-BOS
15h 40m1 stop
$759Avianca
Find Deal
Mon, Mar 16 - Wed, Mar 25
Copa Airlines Logo
7:34 am - 1:58 amBOS-EZE
16h 24m1 stop
Copa Airlines Logo
5:16 am - 10:40 pmEZE-BOS
19h 24m1 stop
$800Copa Airlines
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Mon, Dec 1 - Mon, Dec 8
Delta Logo
12:35 pm - 10:15 amBOS-EZE
19h 40m1 stop
Delta Logo
2:30 am - 6:35 amEZE-BOS
30h 05m1 stop
$802Delta
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Thu, Jan 8 - Tue, Feb 10
Delta Logo
9:55 am - 3:05 amBOS-EZE
16h 10m1 stop
Delta Logo
8:55 pm - 12:48 pmEZE-BOS
16h 53m1 stop
$807Delta
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Wed, Mar 11 - Wed, Mar 25
Copa Airlines Logo
7:34 am - 4:16 amBOS-EZE
18h 42m1 stop
Copa Airlines Logo
3:41 am - 10:40 pmEZE-BOS
20h 59m1 stop
$820Copa Airlines
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Thu, Dec 11 - Sun, Dec 14
United Airlines Logo
3:25 pm - 7:20 amBOS-EZE
37h 55m1 stop
United Airlines Logo
10:05 pm - 6:01 pmEZE-BOS
21h 56m1 stop
$823United Airlines
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Sun, Jan 11 - Thu, Jan 22
United Airlines Logo
3:25 pm - 7:20 amBOS-EZE
37h 55m1 stop
United Airlines Logo
11:55 pm - 6:32 pmEZE-BOS
20h 37m2 stops
$827United Airlines
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Sun, Jan 11 - Wed, Jan 21

Avianca flights from Boston to Buenos Aires

Our best Avianca deals on Boston to Buenos Aires flight tickets
Avianca
Dec 11
BOS7:55 amBoston Logan Intl
19h 55m
1 stop
EZE5:50 amBuenos Aires Ministro Pistarini
Dec 15
EZE4:55 pmBuenos Aires Ministro Pistarini
15h 40m
1 stop
BOS6:35 amBoston Logan Intl
$757
Find similar
Avianca
Mar 16
BOS4:25 pmBoston Logan Intl
22h 25m
2 stops
EZE3:50 pmBuenos Aires Ministro Pistarini
Mar 25
EZE4:55 pmBuenos Aires Ministro Pistarini
15h 40m
1 stop
BOS7:35 amBoston Logan Intl
$759
Find similar
Avianca
Nov 27
BOS7:55 amBoston Logan Intl
19h 45m
1 stop
AEP5:40 amBuenos Aires Jorge Newbery
Dec 10
AEP7:00 amBuenos Aires Jorge Newbery
25h 35m
1 stop
BOS6:35 amBoston Logan Intl
$777
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Copa Airlines flights from Boston to Buenos Aires

Our best Copa Airlines deals on Boston to Buenos Aires flight tickets
Copa Airlines
Dec 1
BOS7:34 amBoston Logan Intl
16h 24m
1 stop
EZE1:58 amBuenos Aires Ministro Pistarini
Dec 8
EZE5:16 amBuenos Aires Ministro Pistarini
19h 24m
1 stop
BOS10:40 pmBoston Logan Intl
$800
Find similar
Copa Airlines
Dec 11
BOS7:34 amBoston Logan Intl
18h 42m
1 stop
EZE4:16 amBuenos Aires Ministro Pistarini
Dec 14
EZE3:41 amBuenos Aires Ministro Pistarini
20h 59m
1 stop
BOS10:40 pmBoston Logan Intl
$820
Find similar
Copa Airlines
Nov 12
BOS7:34 amBoston Logan Intl
18h 36m
1 stop
EZE4:10 amBuenos Aires Ministro Pistarini
Dec 12
EZE2:15 amBuenos Aires Ministro Pistarini
22h 25m
1 stop
BOS10:40 pmBoston Logan Intl
$870
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Boston to Buenos Aires 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 Buenos Aires that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BostonBuenos Aires

BOS - AEP

BOSAEP

Boston Logan Intl

Sun 4/5

5:00 pm-5:00 pm

2 stops23h 00m

Buenos Aires Jorge Newbery

Wed 4/8

5:00 pm-11:29 pm

2 stops31h 29m

$742

BostonBuenos Aires

BOS - EZE

BOSEZE

Boston Logan Intl

Mon 12/8

8:50 pm-8:55 pm

2 stops46h 05m

Buenos Aires Ministro Pistarini

Sat 12/13

9:55 pm-6:35 am

1 stop34h 40m

$750

BostonBuenos Aires

BOS - EZE

BOSEZE

Boston Logan Intl

Thu 12/11

7:55 am-5:50 am

1 stop19h 55m

Buenos Aires Ministro Pistarini

Mon 12/15

4:55 pm-6:35 am

1 stop15h 40m

$757

BostonBuenos Aires

BOS - EZE

BOSEZE

Boston Logan Intl

Mon 3/16

4:25 pm-3:50 pm

2 stops22h 25m

Buenos Aires Ministro Pistarini

Wed 3/25

4:55 pm-7:35 am

1 stop15h 40m

$759

BostonBuenos Aires

BOS - EZE

BOSEZE

Boston Logan Intl

Mon 12/1

7:34 am-1:58 am

1 stop16h 24m

Buenos Aires Ministro Pistarini

Mon 12/8

5:16 am-10:40 pm

1 stop19h 24m

$800

BostonBuenos Aires

BOS - EZE

BOSEZE

Boston Logan Intl

Thu 1/8

12:35 pm-10:15 am

1 stop19h 40m

Buenos Aires Ministro Pistarini

Tue 2/10

2:30 am-6:35 am

1 stop30h 05m

$802

BostonBuenos Aires

BOS - EZE

BOSEZE

Boston Logan Intl

Wed 3/11

9:55 am-3:05 am

1 stop16h 10m

Buenos Aires Ministro Pistarini

Wed 3/25

8:55 pm-12:48 pm

1 stop16h 53m

$807

BostonBuenos Aires

BOS - EZE

BOSEZE

Boston Logan Intl

Thu 12/11

7:34 am-4:16 am

1 stop18h 42m

Buenos Aires Ministro Pistarini

Sun 12/14

3:41 am-10:40 pm

1 stop20h 59m

$820

BostonBuenos Aires

BOS - EZE

BOSEZE

Boston Logan Intl

Sun 1/11

3:25 pm-7:20 am

1 stop37h 55m

Buenos Aires Ministro Pistarini

Thu 1/22

10:05 pm-6:01 pm

1 stop21h 56m

$823

BostonBuenos Aires

BOS - EZE

BOSEZE

Boston Logan Intl

Sun 1/11

3:25 pm-7:20 am

1 stop37h 55m

Buenos Aires Ministro Pistarini

Wed 1/21

11:55 pm-6:32 pm

2 stops20h 37m

$827

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 Buenos Aires from

How to get the cheapest flight ticket from Boston to Buenos Aires

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 Buenos Aires?

The cheapest month to fly to Buenos Aires from Boston is in September. Flight prices, which tend to average around $1,035, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of September, then book flights to Buenos Aires from Boston during October instead. Flights to Buenos Aires in October, while not as cheap as those in September, still average around $1,095.

What is the cheapest day to depart on your flight to Buenos Aires?

On average, the least expensive day to fly to Buenos Aires from Boston is on a Monday. momondo users have found tickets for Monday departures for as low as $1,088. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Friday as prices are generally higher than usual. According to our data, the average ticket price to Buenos Aires on Friday is $1,303.

What is the cheapest time of day to depart on your flight to Buenos Aires?

Our most recent data shows that the best time of day to fly to Buenos Aires is in the morning. Flights from Boston to Buenos Aires during this time can be as low as $1,079. Try not to purchase tickets at noon because they tend to be around $1,280. Of course, these prices can vary depending on the time of year and what airport you fly to.

How far in advance should I book a flight to Buenos Aires?

You are more likely to see cheaper flights to Buenos Aires from Boston when booking weeks ahead of your departure date. In general, you can expect to find flights to Buenos Aires for around $1,247 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Buenos Aires from Boston for as low as $1,038 on momondo.

Can stopping save me money on Boston to Buenos Aires flights?

You could potentially save up to 17% on your flight if you consider stops on a Boston to Buenos Aires flight.

How have Boston to Buenos Aires flight prices changed over time?

As of November 2025, prices for Boston to Buenos Aires flights are approximately 8% cheaper when compared to flights at the same time last year.

When to book flights from Boston to Buenos Aires

Are you open to changing your travel dates? Check out the ideal times to fly from Boston to Buenos Aires according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Boston to Buenos Aires (BOS to BUE) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Boston to Buenos Aires

Direct flights

None
There are no direct flights from Boston to Buenos Aires. There are no popular flight routes from Boston to Buenos Aires.
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  • How far is Boston Logan Intl to Buenos Aires by plane?

    Buenos Aires is 5374.8 mi away from Boston Logan Intl. A reasonable flight in good conditions will take 14h 40m.

  • When did momondo last update prices for flights from Boston Logan Intl Airport to Buenos Aires?

    Prices for flights from Boston Logan Intl Airport to Buenos Aires refresh daily.

  • How many operators does momondo search for flights from Boston Logan Intl Airport to Buenos Aires?

  • How old do you have to be to fly from Boston Logan Intl Airport to Buenos Aires?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Boston Logan Intl Airport to Buenos Aires.

  • What documentation or ID do you need to fly to Buenos Aires?

    The travel and health documents required for your trip to Buenos Aires 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 Buenos Aires. 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 Buenos Aires?

Best airlines flying from Boston to Buenos Aires

Compare and see reviews for airlines that fly from Boston to Buenos Aires with momondo
Airline
Rating
Free Cancellation
Price
LATAM AirlinesPriceFrom $517Free CancellationRating
7.5
1,874 reviews
Search LATAM Airlines flights
AviancaPriceFrom $700Free CancellationRating
6.6
2,471 reviews
Search Avianca flights
Copa AirlinesPriceFrom $796Free CancellationRating
7.6
1,561 reviews
Search Copa Airlines flights
American AirlinesPriceFrom $1,034Free CancellationRating
7.2
11,039 reviews
Search American Airlines flights
DeltaPriceFrom $1,035Free CancellationRating
7.9
8,004 reviews
Search Delta flights
United AirlinesPriceFrom $1,074Free CancellationRating
7.4
9,000 reviews
Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Boston to Buenos Aires?

It is quick and easy to find Boston to Buenos Aires 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 Buenos Aires that suits you.

Can I find flights from Boston to Buenos Aires with flexible booking policies on momondo?

momondo does allow users to show only those flights to Buenos Aires from Boston which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Boston to Buenos Aires?

momondo helps you find the best flight between Boston and Buenos Aires by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Boston to Buenos Aires right now. Can momondo alert me if prices change?

Price alerts on flights to Buenos Aires from Boston are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your Buenos Aires trip

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Find better results for your trip to Argentina

Fly into one of these airports located in Buenos Aires

Airports listed have a maximum distance of 17.0 mi from Buenos Aires
Buenos Aires Jorge Newbery Airport
Buenos Aires Ministro Pistarini Airport