$241+ 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 12/27. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — BUE
Oct 17 — Oct 241
1 adult, Economy
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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 October or September, booked 76 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 September 17, 2025.
Round-trip from | $688 (FlightHub) |
|---|---|
One-way from | $241 (Justfly.com) |
Popular in | December |
Cheapest in | October |
Average price | $773 |
Find flight deals from Key Largo to Buenos Aires
Cheapest flights from Key Largo to Buenos AiresExplore 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 September 17, 2025.
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 September 17, 2025.
This FlightHub deal was found by Cheapflights users on 9/16. 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.
Sat 10/119:45 amMIA - EZE
2 stops20h 15mMultiple Airlines
Thu 10/305:10 amEZE - MIA
1 stop28h 10mMultiple Airlines
Deal found 9/16![Multiple Airlines logo]()
$688
This Atrapalo deal was found by Cheapflights users on 9/16. 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 Atrapalo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/149:45 amMIA - AEP
2 stops16h 55mMultiple Airlines
Sun 10/194:55 amAEP - MIA
1 stop13h 10mMultiple Airlines
Deal found 9/16![Multiple Airlines logo]()
$688
This Kiwi.com deal was found by Cheapflights users on 9/16. 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 10/217:55 amMIA - EZE
2 stops17h 35mMultiple Airlines
Wed 11/127:35 amEZE - MIA
1 stop11h 30mMultiple Airlines
Deal found 9/16![Multiple Airlines logo]()
$689
This Kiwi.com deal was found by Cheapflights users on 9/17. 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.
Mon 10/66:25 pmMIA - AEP
1 stop12h 55mMultiple Airlines
Wed 10/83:40 pmAEP - MIA
2 stops17h 40mMultiple Airlines
Deal found 9/17![Multiple Airlines logo]()
$689
This Mytrip deal was found by Cheapflights users on 9/15. 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.
Fri 10/249:45 amMIA - EZE
2 stops21h 28mMultiple Airlines
Mon 11/37:35 amEZE - MIA
1 stop16h 55mMultiple Airlines
Deal found 9/15![Multiple Airlines logo]()
$690
This Mytrip deal was found by Cheapflights users on 9/14. 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.
Mon 10/209:45 amMIA - AEP
2 stops24h 35mMultiple Airlines
Sat 10/2512:05 amAEP - MIA
2 stops17h 35mMultiple Airlines
Deal found 9/14![Multiple Airlines logo]()
$690
This Avianca deal was found by Cheapflights users on 9/15. 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 Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1611:15 amMIA - EZE
2 stops16h 10mAvianca
Thu 10/306:15 amEZE - MIA
2 stops18h 15mAvianca
Deal found 9/15![Avianca logo]()
$691
This FlightHub deal was found by Cheapflights users on 9/15. 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 12/38:45 amMIA - AEP
1 stop20h 45mMultiple Airlines
Sun 12/289:50 amAEP - MIA
2 stops23h 30mMultiple Airlines
Deal found 9/15![Multiple Airlines logo]()
$691
This Priceline deal was found by Cheapflights users on 9/15. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/262:05 amMIA - EZE
1 stop20h 30mAvianca
Thu 12/117:35 amEZE - MIA
1 stop21h 35mAvianca
Deal found 9/15![Avianca logo]()
$692
This FlightHub deal was found by Cheapflights users on 9/15. 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.
Tue 9/169:45 amMIA - AEP
1 stop21h 35mMultiple Airlines
Fri 9/199:50 amAEP - MIA
2 stops23h 25mMultiple Airlines
Deal found 9/15![Multiple Airlines logo]()
$692
This Priceline deal was found by Cheapflights users on 9/15. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/72:05 amMIA - EZE
1 stop11h 45mAvianca
Tue 11/184:55 pmEZE - MIA
2 stops20h 20mAvianca
Deal found 9/15![Avianca logo]()
$693
This Booking.com deal was found by Cheapflights users on 9/16. 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.
Tue 12/308:45 amMIA - AEP
2 stops16h 55mMultiple Airlines
Mon 1/129:50 amAEP - MIA
2 stops23h 30mMultiple Airlines
Deal found 9/16![Multiple Airlines logo]()
$693
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 September 17, 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 - AEP
MIAAEP
Miami
Thu 10/9
1:55 pm-5:30 pm
2 stops26h 35m
Buenos Aires Jorge Newbery
Thu 10/16
9:55 pm-5:05 pm
2 stops20h 10m
$695
MiamiBuenos Aires
MIA - AEP
MIAAEP
Miami
Thu 10/16
9:45 am-3:40 am
2 stops16h 55m
Buenos Aires Jorge Newbery
Mon 10/27
3:00 pm-8:20 am
2 stops18h 20m
$695
MiamiBuenos Aires
MIA - AEP
MIAAEP
Miami
Mon 11/17
8:45 am-11:20 am
2 stops24h 35m
Buenos Aires Jorge Newbery
Fri 11/21
6:00 pm-7:20 am
3 stops39h 20m
$695
MiamiBuenos Aires
MIA - AEP
MIAAEP
Miami
Thu 10/23
9:45 am-9:20 pm
2 stops34h 35m
Buenos Aires Jorge Newbery
Sun 11/16
9:30 pm-4:23 pm
2 stops20h 53m
$696
MiamiBuenos Aires
MIA - AEP
MIAAEP
Miami
Wed 10/8
9:45 am-12:20 pm
2 stops25h 35m
Buenos Aires Jorge Newbery
Thu 10/30
10:55 am-4:10 am
2 stops18h 15m
$719
MiamiBuenos Aires
MIA - AEP
MIAAEP
Miami
Wed 10/22
9:45 am-8:30 am
1 stop21h 45m
Buenos Aires Jorge Newbery
Sun 11/9
7:00 am-5:05 pm
1 stop12h 05m
$722
MiamiBuenos Aires
MIA - AEP
MIAAEP
Miami
Sat 11/8
8:45 am-8:40 pm
2 stops33h 55m
Buenos Aires Jorge Newbery
Sun 11/23
7:00 am-3:20 pm
3 stops34h 20m
$722
MiamiBuenos Aires
MIA - AEP
MIAAEP
Miami
Tue 10/21
9:45 am-3:40 am
2 stops16h 55m
Buenos Aires Jorge Newbery
Tue 11/4
7:00 am-3:20 pm
3 stops34h 20m
$722
MiamiBuenos Aires
MIA - AEP
MIAAEP
Miami
Mon 12/1
5:10 pm-7:30 am
1 stop12h 20m
Buenos Aires Jorge Newbery
Sun 1/18
10:30 am-7:20 am
2 stops22h 50m
$726
MiamiBuenos Aires
MIA - AEP
MIAAEP
Miami
Wed 10/29
12:20 am-4:00 pm
1 stop14h 40m
Buenos Aires Jorge Newbery
Thu 11/6
8:25 pm-10:51 am
2 stops16h 26m
$738
Showing 1-10 of 45 results
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 September 12, 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 76 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, April is the cheapest month in which you can book a flight from Key Largo to Buenos Aires (average of $795). Flying from Key Largo to Buenos Aires in December is currently the most expensive (average of $1,260). 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 September 17, 2025.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Key Largo to Buenos Aires as you normally would.
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 October 13, 2024.
Travelers seeking maximum savings on their Key Largo to Buenos Aires flight should consider departing on Wednesday at noon when fares are most often at their lowest. Friday 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 September 17, 2025.
The most flights from KE9 to BUE are scheduled on a Monday (8 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (8 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 September 17, 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.
Overall
8.1
Boarding
8.0
Crew
8.3
Comfort
7.5
Food
6.5
Entertainment
5.7
Reviews
1 / 5
2.0
MediocrePaula,Aug 2025
EZE - MIA
Overall
8.1
Boarding
8.0
Crew
8.3
Comfort
7.5
Food
6.5
Entertainment
5.7
Reviews
1 / 5
2.0
MediocrePaula,Aug 2025
EZE - MIA
Overall
8.1
Boarding
8.0
Crew
8.3
Comfort
7.5
Food
6.5
Entertainment
5.7
Reviews
1 / 5
2.0
MediocrePaula,Aug 2025
EZE - MIA
Overall
8.1
Boarding
8.0
Crew
8.3
Comfort
7.5
Food
6.5
Entertainment
5.7
Reviews
1 / 5
2.0
MediocrePaula,Aug 2025
EZE - MIA
Overall
8.1
Boarding
8.0
Crew
8.3
Comfort
7.5
Food
6.5
Entertainment
5.7
Reviews
1 / 5
2.0
MediocrePaula,Aug 2025
EZE - MIA
Overall
8.1
Boarding
8.0
Crew
8.3
Comfort
7.5
Food
6.5
Entertainment
5.7
Reviews
1 / 5
2.0
MediocrePaula,Aug 2025
EZE - MIA
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.
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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.
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 September 17, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$407 | Average$855 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$448 | Average$728 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$519 | Average$1,035 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$551 | Average$805 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$627 | Average$987 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$663 | Average$853 | FlexibilityNo cancel fee | On-time81% | |
| Cheapest$668 | Average$839 | FlexibilityNo cancel fee | On-time59% | |
| Cheapest$672 | Average$818 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$721 | Average$1,139 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$819 | Average$1,088 | FlexibilityNo cancel fee | On-time71% |