HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Buenos Aires

$243+ 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 3/28. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — BUE
Dec 13 — Dec 201
Sat 12/13
Sat 12/20
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Key Largo to Buenos Aires with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Key Largo to Buenos Aires are usually found in September or October, booked 82 days in advance, depart on a Tuesday or Thursday and return on a Wednesday

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 November 13, 2025.

Most accurate provider

Gotogate
3 stars

Most trusted provider

Gotogate
3 stars

Round-trip from

$695
(CheapOair)

One-way from

$243
(CheapOair)

Popular in

December

Cheapest in

September

Average price

$799
Provider with most accurate pricing for Miami-Buenos Aires (BUE) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Miami-Buenos Aires (BUE) flights.
Search Deals
From Key Largo to Buenos Aires (BUE)
Search Deals
One-way flight from Key Largo to Buenos Aires (BUE)
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($64 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($20 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

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 November 13, 2025.

This Trip.com deal was found by Cheapflights users on 11/10. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/143:55 pmMIA - EZE
1 stop20h 55mMultiple Airlines
Tue 11/253:30 amEZE - MIA
1 stop14h 20mMultiple Airlines
Deal found 11/10$695
This CheapOair deal was found by Cheapflights users on 11/11. 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.
Mon 12/88:40 amMIA - AEP
1 stop20h 50mMultiple Airlines
Wed 12/179:05 pmAEP - MIA
1 stop22h 05mMultiple Airlines
Deal found 11/11$695
This CheapOair deal was found by Cheapflights users on 11/12. 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.
Tue 11/188:40 amMIA - EZE
2 stops20h 15mMultiple Airlines
Mon 11/242:40 amEZE - MIA
1 stop26h 55mMultiple Airlines
Deal found 11/12$696
This Booking.com deal was found by Cheapflights users on 11/11. 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.
Wed 11/128:40 amMIA - AEP
2 stops41h 00mMultiple Airlines
Sat 11/159:50 amAEP - MIA
2 stops23h 30mMultiple Airlines
Deal found 11/11$696
This CheapOair deal was found by Cheapflights users on 11/12. 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.
Thu 11/274:20 pmMIA - EZE
1 stop32h 30mLATAM Airlines
Thu 12/411:00 amEZE - MIA
Nonstop8h 55mLATAM Airlines
Deal found 11/12$697
This Kiwi.com deal was found by Cheapflights users on 11/12. 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 11/234:59 amMIA - EZE
1 stop15h 32mCopa Airlines
Wed 12/33:41 amEZE - MIA
1 stop11h 55mCopa Airlines
Deal found 11/12$698
This CrystalTravel deal was found by Cheapflights users on 11/12. 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.
Fri 11/288:45 pmMIA - AEP
1 stop20h 55mLATAM Airlines
Wed 12/310:55 pmAEP - MIA
2 stops17h 25mLATAM Airlines
Deal found 11/12$698
This Trip.com deal was found by Cheapflights users on 11/11. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/222:05 amMIA - EZE
1 stop11h 45mMultiple Airlines
Tue 12/28:00 amEZE - MIA
Nonstop9h 15mMultiple Airlines
Deal found 11/11$699
This Mytrip deal was found by Cheapflights users on 11/12. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/155:10 pmMIA - AEP
1 stop12h 20mMultiple Airlines
Wed 11/197:00 amAEP - MIA
1 stop12h 05mMultiple Airlines
Deal found 11/12$699
This FlightHub deal was found by Cheapflights users on 11/12. 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 12/18:20 amMIA - EZE
2 stops22h 55mLATAM Airlines
Mon 12/84:05 amEZE - MIA
1 stop12h 15mLATAM Airlines
Deal found 11/12$700
This LATAM Airlines deal was found by Cheapflights users on 11/12. 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.
Sun 12/73:55 pmMIA - EZE
1 stop12h 25mLATAM Airlines
Sun 12/217:43 pmEZE - MIA
1 stop24h 42mLATAM Airlines
Deal found 11/12$701
This KAYAK deal was found by Cheapflights users on 11/12. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/1412:53 pmMIA - AEP
2 stops17h 02mLATAM Airlines
Sat 12/206:20 pmAEP - MIA
1 stop12h 50mLATAM Airlines
Deal found 11/12$701

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 November 13, 2025.
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 - EZE

MIAEZE

Miami

Sun 12/7

4:59 am-12:58 am

1 stop17h 59m

Buenos Aires Ministro Pistarini

Wed 12/17

5:16 am-6:51 pm

1 stop15h 35m

$704

MiamiBuenos Aires

MIA - AEP

MIAAEP

Miami

Mon 12/1

8:20 am-10:30 am

2 stops24h 10m

Buenos Aires Jorge Newbery

Tue 12/16

9:05 pm-5:10 pm

1 stop22h 05m

$707

MiamiBuenos Aires

MIA - AEP

MIAAEP

Miami

Sun 3/8

12:10 am-4:00 pm

1 stop14h 50m

Buenos Aires Jorge Newbery

Sun 3/15

10:30 pm-10:15 pm

3 stops24h 45m

$710

MiamiBuenos Aires

MIA - EZE

MIAEZE

Miami

Mon 12/1

4:35 pm-5:50 am

1 stop11h 15m

Buenos Aires Ministro Pistarini

Sat 12/13

2:40 am-3:05 pm

1 stop14h 25m

$711

MiamiBuenos Aires

MIA - EZE

MIAEZE

Miami

Wed 12/10

4:42 pm-9:20 am

1 stop14h 38m

Buenos Aires Ministro Pistarini

Thu 12/25

11:55 pm-10:40 pm

1 stop24h 45m

$716

MiamiBuenos Aires

MIA - AEP

MIAAEP

Miami

Wed 2/4

9:35 am-11:40 am

1 stop24h 05m

Buenos Aires Jorge Newbery

Thu 4/9

9:50 am-8:00 am

2 stops23h 10m

$716

MiamiBuenos Aires

MIA - AEP

MIAAEP

Miami

Sat 3/14

8:20 pm-7:40 pm

1 stop22h 20m

Buenos Aires Jorge Newbery

Fri 3/20

4:40 am-8:20 am

1 stop28h 40m

$719

MiamiBuenos Aires

MIA - EZE

MIAEZE

Miami

Sun 12/14

6:00 am-9:20 am

2 stops25h 20m

Buenos Aires Ministro Pistarini

Thu 1/8

10:05 pm-10:56 am

1 stop14h 51m

$720

MiamiBuenos Aires

MIA - EZE

MIAEZE

Miami

Thu 12/11

4:42 pm-9:20 am

1 stop14h 38m

Buenos Aires Ministro Pistarini

Wed 12/17

10:05 pm-8:11 pm

2 stops24h 06m

$720

MiamiBuenos Aires

MIA - EZE

MIAEZE

Miami

Fri 12/5

5:56 pm-7:20 am

3 stops35h 24m

Buenos Aires Ministro Pistarini

Mon 12/22

11:55 pm-10:30 am

2 stops36h 35m

$720

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/12

Showing 1-10 of 40 results
1
2
3
4

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 November 7, 2025.

To ensure you get the cheapest price possible for a flight from Key Largo to Buenos Aires, you should look to book at least 82 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, September is the cheapest month in which you can book a flight from Key Largo to Buenos Aires (average of $347). Flying from Key Largo to Buenos Aires in January is currently the most expensive (average of $696). 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 November 13, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 22% on flights from Key Largo to Buenos Aires by exploring options for tickets in the morning.

What is the cheapest day to fly from Key Largo to Buenos Aires?

Use this chart to determine the cheapest time to fly round-trip from Key Largo to Buenos Aires. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Key Largo to Buenos Aires flight should consider departing on Friday afternoons when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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 November 13, 2025.

The most flights from KE9 to BUE are scheduled on a Tuesday (9 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (6 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 November 13, 2025.
Peruse reviews from past customers who have flown with Aerolineas Argentinas, Copa Airlines, 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
8.0
Very good
961 reviews

Food

6.5

Overall

8.0

Boarding

8.0

Comfort

7.5

Crew

8.3

Entertainment

5.7

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
8.0
Very good
961 reviews
Aerolineas Argentinas
8.0
Very good
961 reviews

Food

6.5

Overall

8.0

Boarding

8.0

Comfort

7.5

Crew

8.3

Entertainment

5.7

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
Copa Airlines
7.6
Good
1,565 reviews
Aerolineas Argentinas
8.0
Very good
961 reviews

Food

6.5

Overall

8.0

Boarding

8.0

Comfort

7.5

Crew

8.3

Entertainment

5.7

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
1,876 reviews
Aerolineas Argentinas
8.0
Very good
961 reviews

Food

6.5

Overall

8.0

Boarding

8.0

Comfort

7.5

Crew

8.3

Entertainment

5.7

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
11,051 reviews
Aerolineas Argentinas
8.0
Very good
961 reviews

Food

6.5

Overall

8.0

Boarding

8.0

Comfort

7.5

Crew

8.3

Entertainment

5.7

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
2,476 reviews
Aerolineas Argentinas
8.0
Very good
961 reviews

Food

6.5

Overall

8.0

Boarding

8.0

Comfort

7.5

Crew

8.3

Entertainment

5.7

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?

    Copa Airlines, LATAM Airlines, and Avianca can get you from Key Largo to Buenos Aires in just under 11h 15m. Your travel time can differ by up to 12h 55m. 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?

    $255 is the cheapest one-way deal found within the past few days, from Copa Airlines. You may also be able to find cheap deals on United Airlines and Avianca, with prices starting from $258 and $263, 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 (76%) and EL AL (76%).

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

    Looking at all options, your cheapest flight can be booked for $307. While the most popular route (Miami - Buenos Aires Ministro Pistarini) can be booked for $521 on average, our data indicates $1,415 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, September is the cheapest month in which you can book a flight from Key Largo to Buenos Aires (average of $347). Flying from Key Largo to Buenos Aires in January is currently the most expensive (average of $696). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Key Largo to Buenos Aires

See prices for flight routes from nearby airports that may be better suited for you.
Miami to Ministro Pistarini flights
Miami to Jorge Newbery flights
Fort Lauderdale to Ministro Pistarini flights
Orlando to Ministro Pistarini flights
Orlando to Jorge Newbery flights
Tampa to Ministro Pistarini flights
Tampa to Jorge Newbery flights
Miami to Mendoza flights
Miami to Cordoba flights
Fort Lauderdale to Jorge Newbery flights
West Palm Beach to Ministro Pistarini flights
Jacksonville to Ministro Pistarini flights
Orlando to Mendoza flights
Miami to Ushuaia flights
Fort Lauderdale to Cordoba flights
Orlando to Cordoba flights
Miami to San Carlos de Bariloche flights
Fort Lauderdale to Mendoza flights
Tallahassee to Ministro Pistarini flights
Tampa to Cordoba flights
Fort Myers to Ministro Pistarini flights
Jacksonville to Jorge Newbery flights
Pensacola to Ministro Pistarini flights
Sarasota to Ministro Pistarini flights
Valparaiso to Ministro Pistarini flights
Fort Lauderdale to San Carlos de Bariloche flights
Miami to Rosario flights
Orlando to San Miguel de Tucumán flights
Tampa to Mendoza flights
Daytona Beach to Ministro Pistarini flights
Panama City to Cordoba flights
West Palm Beach to Cordoba flights
Orlando to Ushuaia flights
Miami to El Palomar flights
Fort Lauderdale to Rosario flights
Miami to Mar del Plata flights
Miami to Neuquén flights
Miami to San Miguel de Tucumán flights

Top 10 airlines flying from Key Largo to Buenos Aires

Discover the top 10 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 November 13, 2025.
AirlineCheapestAverageFlexibilityOn-time
Copa AirlinesCheapest$402Average$872FlexibilityNo cancel feeOn-time70%
ArajetCheapest$471Average$928FlexibilityNo cancel feeOn-timeN/A
GOLCheapest$519Average$789FlexibilityNo cancel feeOn-time74%
AviancaCheapest$550Average$813FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$629Average$934FlexibilityNo cancel feeOn-time69%
LATAM AirlinesCheapest$667Average$895FlexibilityNo cancel feeOn-time81%
Aerolineas ArgentinasCheapest$668Average$829FlexibilityNo cancel feeOn-time59%
BoACheapest$672Average$859FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$794Average$1,059FlexibilityNo cancel feeOn-time71%
DeltaCheapest$910Average$1,132FlexibilityNo cancel feeOn-timeN/A

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.