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$242+ Cheap flights from Key Largo, FL to Buenos Aires (BUE)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/19. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — BUE
Feb 5 — Feb 121
Thu 2/5
Thu 2/12
1 adult, Economy
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Cheapflights Tip: The best prices from Key Largo to Buenos Aires are usually found in October or September, booked 82 days in advance, depart on a Tuesday or Thursday and return on a Monday

Cheap flight deals from Key Largo to Buenos Aires

Keep the following information in mind while searching for Key Largo to Buenos Aires flight deals. Data was last updated January 6, 2026.

Most accurate provider

Gotogate
3 stars

Most trusted provider

Gotogate
3 stars

Round-trip from

$639
(Gotogate)

One-way from

$242
(Kiwi.com)

Popular in

December

Cheapest in

October

Average price

$855
Provider with most accurate pricing for Miami-Buenos Aires (BUE) flight deals.
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Provider most trusted by Cheapflights users for Miami-Buenos Aires (BUE) flights.
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From Key Largo to Buenos Aires (BUE)
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One-way flight from Key Largo to Buenos Aires (BUE)
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Highest demand for flights based on searches. 4% potential increase in price ($39 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($19 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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Find flight deals from Key Largo to Buenos Aires

Cheapest flights from Key Largo to Buenos Aires
Explore the most affordable flight options available from Key Largo to Buenos Aires. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 6, 2026.

This Booking.com deal was found by Cheapflights users on 1/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/95:30 pmMIA - EZE
2 stops17h 00mLATAM Airlines
Mon 4/207:21 pmEZE - MIA
2 stops19h 14mLATAM Airlines
Deal found 1/6$639
This CrystalTravel deal was found by Cheapflights users on 1/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/44:37 pmMIA - EZE
2 stops32h 13mLATAM Airlines
Fri 2/69:55 pmEZE - MIA
1 stop20h 50mLATAM Airlines
Deal found 1/5$640
This Kiwi.com deal was found by Cheapflights users on 1/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/266:25 pmMIA - AEP
2 stops15h 35mMultiple Airlines
Mon 5/117:00 amAEP - MIA
1 stop11h 55mMultiple Airlines
Deal found 1/5$640
This CheapOair deal was found by Cheapflights users on 1/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/82:09 pmMIA - EZE
1 stop12h 14mArajet
Fri 5/159:15 pmEZE - MIA
1 stop16h 10mArajet
Deal found 1/6$641
This Kiwi.com deal was found by Cheapflights users on 1/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/76:25 pmMIA - AEP
1 stop13h 05mMultiple Airlines
Sun 4/124:40 amAEP - MIA
1 stop13h 25mMultiple Airlines
Deal found 1/4$641
This FlightHub deal was found by Cheapflights users on 1/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/119:45 amMIA - EZE
2 stops16h 55mMultiple Airlines
Thu 3/195:25 amEZE - MIA
1 stop27h 55mMultiple Airlines
Deal found 1/6$642
This Kiwi.com deal was found by Cheapflights users on 1/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/226:10 pmMIA - AEP
1 stop13h 20mMultiple Airlines
Fri 3/274:40 amAEP - MIA
1 stop13h 10mMultiple Airlines
Deal found 1/5$642
This FlightHub deal was found by Cheapflights users on 1/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/239:45 amMIA - EZE
2 stops16h 55mMultiple Airlines
Sun 4/57:30 pmEZE - MIA
2 stops22h 35mMultiple Airlines
Deal found 1/6$643
This Kiwi.com deal was found by Cheapflights users on 1/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/96:25 pmMIA - AEP
1 stop13h 05mMultiple Airlines
Mon 4/204:40 amAEP - MIA
1 stop13h 25mMultiple Airlines
Deal found 1/5$643
This LATAM Airlines deal was found by Cheapflights users on 1/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/311:10 pmMIA - EZE
2 stops17h 33mLATAM Airlines
Wed 2/42:25 amEZE - MIA
2 stops19h 00mLATAM Airlines
Deal found 1/5$644
This LATAM Airlines deal was found by Cheapflights users on 1/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/311:10 pmMIA - AEP
2 stops18h 30mLATAM Airlines
Thu 2/56:20 pmAEP - MIA
2 stops18h 31mLATAM Airlines
Deal found 1/5$644
This Gotogate deal was found by Cheapflights users on 1/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/279:45 amMIA - EZE
2 stops16h 55mMultiple Airlines
Sat 4/41:40 amEZE - MIA
1 stop11h 50mMultiple Airlines
Deal found 1/5$645

Cheapflights Fare Finder

 
Customize your flight search to find flights from Key Largo 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, Cheapflights users made 2,558,603 searches. Data last updated January 6, 2026.
Use the filters below to find and compare flights from Key Largo to Buenos Aires that are best for you.

Fly from

Key Largo

Fly to

Buenos Aires

Route

Depart

Return

Price

MiamiBuenos Aires

MIA - AEP

MIAAEP

Miami

Fri 3/6

5:10 pm-8:30 am

1 stop13h 20m

Buenos Aires Jorge Newbery

Fri 3/13

4:40 am-4:50 pm

1 stop13h 10m

$639

MiamiBuenos Aires

MIA - EZE

MIAEZE

Miami

Wed 4/1

5:18 pm-10:00 am

1 stop15h 42m

Buenos Aires Ministro Pistarini

Sat 4/11

1:20 pm-8:55 pm

Nonstop8h 35m

$644

MiamiBuenos Aires

MIA - AEP

MIAAEP

Miami

Mon 3/23

9:45 am-8:30 am

1 stop21h 45m

Buenos Aires Jorge Newbery

Sun 3/29

4:50 am-8:05 am

1 stop28h 15m

$652

MiamiBuenos Aires

MIA - AEP

MIAAEP

Miami

Wed 4/1

6:05 pm-11:00 am

2 stops15h 55m

Buenos Aires Jorge Newbery

Wed 4/15

9:30 pm-8:15 am

2 stops35h 45m

$654

MiamiBuenos Aires

MIA - AEP

MIAAEP

Miami

Wed 4/1

6:05 pm-9:20 pm

2 stops26h 15m

Buenos Aires Jorge Newbery

Sat 4/11

9:30 pm-5:05 pm

2 stops20h 35m

$655

MiamiBuenos Aires

MIA - AEP

MIAAEP

Miami

Sat 3/21

9:45 am-8:30 am

1 stop21h 45m

Buenos Aires Jorge Newbery

Sun 3/29

4:50 am-4:50 pm

1 stop13h 00m

$663

MiamiBuenos Aires

MIA - AEP

MIAAEP

Miami

Tue 2/3

11:10 pm-4:00 pm

1 stop14h 50m

Buenos Aires Jorge Newbery

Thu 2/5

2:55 pm-5:10 am

1 stop16h 15m

$666

MiamiBuenos Aires

MIA - AEP

MIAAEP

Miami

Thu 5/21

6:25 pm-11:00 am

2 stops15h 35m

Buenos Aires Jorge Newbery

Sun 5/31

9:35 am-8:15 am

2 stops23h 40m

$667

MiamiBuenos Aires

MIA - AEP

MIAAEP

Miami

Tue 3/31

9:45 am-8:30 am

1 stop21h 45m

Buenos Aires Jorge Newbery

Wed 4/29

4:40 am-5:05 pm

1 stop13h 25m

$671

MiamiBuenos Aires

MIA - AEP

MIAAEP

Miami

Fri 3/13

6:10 pm-8:30 am

1 stop13h 20m

Buenos Aires Jorge Newbery

Sat 3/21

10:30 pm-6:10 pm

1 stop20h 40m

$676

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/5

Showing 1-10 of 41 results
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Best time to book a flight from Key Largo to Buenos Aires

Have a flexible travel schedule? Discover the best time to fly to Buenos Aires from Key Largo with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Key Largo to Buenos Aires

How far ahead should I book a flight from Key Largo to Buenos Aires?

Use this chart to determine the optimal time to book a round-trip flight from Key Largo to Buenos Aires. Price data was last updated on January 2, 2026.

To ensure you get the cheapest price possible for a flight from Key Largo to Buenos Aires, you should look to book at least 71 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Key Largo to Buenos Aires?

Currently, December is the cheapest month in which you can book a flight from Key Largo to Buenos Aires (average of $267). Flying from Key Largo to Buenos Aires in February is currently the most expensive (average of $689). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from KE9 to BUE?

Find hourly flight availability from Key Largo to Buenos Aires. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 6, 2026.

Unlike at noon, when flights are generally more expensive, you can save up to 29% on flights from Key Largo to Buenos Aires by exploring options for tickets in the morning.

Weekly flight availability from Key Largo to Buenos Aires

Explore weekly flight availability from Key Largo to Buenos Aires. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated January 6, 2026.

The most flights from KE9 to BUE are scheduled on a Monday (15 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (12 on average).

Reviews of airlines servicing Buenos Aires

Get insights into the airlines that provide service to Buenos Aires. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Buenos Aires. Reviews last updated January 6, 2026.
Peruse reviews from past customers who have flown with Aerolineas Argentinas, Delta, and LATAM Airlines from Key Largo to Buenos Aires to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Aerolineas Argentinas
8.1
Very good
987 reviews

Comfort

7.6

Entertainment

5.8

Crew

8.4

Boarding

8.0

Overall

8.1

Food

6.5

Reviews

1 / 5
2.0
Mediocre

Paula,Aug 2025

EZE - MIA

I can not take the flight because Service dogs are not allowed. I m asking the refund of my flight. Please take care of my request # 00447290197500
Aerolineas Argentinas
8.1
Very good
987 reviews
Aerolineas Argentinas
8.1
Very good
987 reviews

Comfort

7.6

Entertainment

5.8

Crew

8.4

Boarding

8.0

Overall

8.1

Food

6.5

Reviews

1 / 5
2.0
Mediocre

Paula,Aug 2025

EZE - MIA

I can not take the flight because Service dogs are not allowed. I m asking the refund of my flight. Please take care of my request # 00447290197500
Delta
7.9
Good
8,022 reviews
Aerolineas Argentinas
8.1
Very good
987 reviews

Comfort

7.6

Entertainment

5.8

Crew

8.4

Boarding

8.0

Overall

8.1

Food

6.5

Reviews

1 / 5
2.0
Mediocre

Paula,Aug 2025

EZE - MIA

I can not take the flight because Service dogs are not allowed. I m asking the refund of my flight. Please take care of my request # 00447290197500
LATAM Airlines
7.5
Good
1,899 reviews
Aerolineas Argentinas
8.1
Very good
987 reviews

Comfort

7.6

Entertainment

5.8

Crew

8.4

Boarding

8.0

Overall

8.1

Food

6.5

Reviews

1 / 5
2.0
Mediocre

Paula,Aug 2025

EZE - MIA

I can not take the flight because Service dogs are not allowed. I m asking the refund of my flight. Please take care of my request # 00447290197500
American Airlines
7.2
Good
11,088 reviews
Aerolineas Argentinas
8.1
Very good
987 reviews

Comfort

7.6

Entertainment

5.8

Crew

8.4

Boarding

8.0

Overall

8.1

Food

6.5

Reviews

1 / 5
2.0
Mediocre

Paula,Aug 2025

EZE - MIA

I can not take the flight because Service dogs are not allowed. I m asking the refund of my flight. Please take care of my request # 00447290197500
Avianca
6.6
Okay
2,498 reviews
Aerolineas Argentinas
8.1
Very good
987 reviews

Comfort

7.6

Entertainment

5.8

Crew

8.4

Boarding

8.0

Overall

8.1

Food

6.5

Reviews

1 / 5
2.0
Mediocre

Paula,Aug 2025

EZE - MIA

I can not take the flight because Service dogs are not allowed. I m asking the refund of my flight. Please take care of my request # 00447290197500

Related info for your journey

Find useful and relevant information for your journey from Key Largo to Buenos Aires. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Key Largo to Buenos Aires?

    LATAM Airlines and Arajet can get you from Key Largo to Buenos Aires in just under 8h 40m. Your travel time can differ by up to 4h 46m. Key Largo and Buenos Aires are separated by a distance of 4421 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Key Largo to Buenos Aires one-way?

    $207 is the cheapest one-way deal found within the past few days, from Arajet. You may also be able to find cheap deals on Delta and United Airlines, with prices starting from $233 and $238, respectively.

  • What are the most popular routes from Key Largo to Buenos Aires?

    The most popular flight routes from Key Largo to Buenos Aires are Miami - Buenos Aires Ministro Pistarini, Miami - Buenos Aires Jorge Newbery and Miami - El Palomar.

  • What are the most reliable airlines from Key Largo to Buenos Aires?

    The top 3 most reliable airlines when flying from Key Largo to Buenos Aires are Delta (82%), Aerolineas Argentinas (79%) and EL AL (79%).

  • What are the cheapest flights from Key Largo to Buenos Aires?

    Looking at all options, your cheapest flight can be booked for $239. While the most popular route (Miami - Buenos Aires Ministro Pistarini) can be booked for $518 on average, our data indicates $1,616 when flying from Key Largo to Buenos Aires.

  • Can I find deals for flights from Key Largo to Buenos Aires that include hotel bookings?

    Yes. In addition to deals on Key Largo to Buenos Aires flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Key Largo to Buenos Aires?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Key Largo to Buenos Aires.

  • Can I find deals for business class flights from Key Largo to Buenos Aires?

    Yes. Cheapflights offers flight deals from Key Largo to Buenos Aires by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Key Largo to Buenos Aires?

    Currently, December is the cheapest month in which you can book a flight from Key Largo to Buenos Aires (average of $267). Flying from Key Largo to Buenos Aires in February is currently the most expensive (average of $689). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Key Largo to Buenos Aires

See prices for flight routes from nearby airports that may be better suited for you.
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Top 9 airlines flying from Key Largo to Buenos Aires

Discover the top 9 airlines that operate flights from Key Largo to Buenos Aires. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 6, 2026.
AirlineCheapestAverageFlexibilityOn-time
ArajetCheapest$448Average$928FlexibilityNo cancel feeOn-timeN/A
Copa AirlinesCheapest$448Average$871FlexibilityNo cancel feeOn-time70%
AviancaCheapest$544Average$811FlexibilityNo cancel feeOn-time71%
LATAM AirlinesCheapest$610Average$872FlexibilityNo cancel feeOn-time81%
United AirlinesCheapest$629Average$922FlexibilityNo cancel feeOn-time69%
BoACheapest$672Average$811FlexibilityNo cancel feeOn-timeN/A
Aerolineas ArgentinasCheapest$692Average$840FlexibilityNo cancel feeOn-time59%
DeltaCheapest$731Average$1,107FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$751Average$1,018FlexibilityNo cancel feeOn-time71%

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