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Cheap flights from Buenos Aires to Key West from $2,150

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Buenos Aires to Key West departing on 10/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Buenos Aires to Key West

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
9:00 pm - 2:18 pmEZE  Buenos Aires Ministro Pistarini-EYW Key West
42h 18m2 stops Houston George Bush Intcntl Chicago O'Hare Intl
United Airlines Logo
2:15 pm - 8:00 amEYW  Key West-EZE Buenos Aires Ministro Pistarini
40h 45m2 stops Newark Houston George Bush Intcntl
$2,150United Airlines
Thu, Oct 1 - Mon, Oct 5
United Airlines Logo
9:00 pm - 2:18 pmEZE  Buenos Aires Ministro Pistarini-EYW Key West
42h 18m2 stops Houston George Bush Intcntl Chicago O'Hare Intl
United Airlines Logo
2:15 pm - 8:00 amEYW  Key West-EZE Buenos Aires Ministro Pistarini
40h 45m2 stops Newark Houston George Bush Intcntl
$2,222United Airlines
Thu, Oct 1 - Mon, Oct 5
United Airlines Logo
9:00 pm - 1:29 pmEZE  Buenos Aires Ministro Pistarini-EYW Key West
41h 29m2 stops Houston George Bush Intcntl Newark
United Airlines Logo
2:15 pm - 8:00 amEYW  Key West-EZE Buenos Aires Ministro Pistarini
40h 45m2 stops Newark Houston George Bush Intcntl
$2,481United Airlines
Thu, Oct 1 - Mon, Oct 5
United Airlines Logo
9:00 pm - 1:29 pmEZE  Buenos Aires Ministro Pistarini-EYW Key West
41h 29m2 stops Houston George Bush Intcntl Newark
United Airlines Logo
2:15 pm - 8:00 amEYW  Key West-EZE Buenos Aires Ministro Pistarini
40h 45m2 stops Newark Houston George Bush Intcntl
$2,554United Airlines
Thu, Oct 1 - Mon, Oct 5
British Airways Logo
12:25 pm - 7:17 pmEZE  Buenos Aires Ministro Pistarini-EYW Key West
31h 52m3 stops Rio de Janeiro–Galeão Intl London Heathrow Miami
British Airways Logo
1:43 pm - 10:45 amEYW  Key West-EZE Buenos Aires Ministro Pistarini
44h 02m3 stops Miami London Heathrow Rio de Janeiro–Galeão Intl
$13,064British Airways
Thu, Oct 1 - Mon, Oct 5
British Airways Logo
12:25 pm - 7:17 pmEZE  Buenos Aires Ministro Pistarini-EYW Key West
31h 52m3 stops Rio de Janeiro–Galeão Intl London Heathrow Miami
British Airways Logo
1:43 pm - 10:45 amEYW  Key West-EZE Buenos Aires Ministro Pistarini
44h 02m3 stops Miami London Heathrow Rio de Janeiro–Galeão Intl
$13,078British Airways
Thu, Oct 1 - Mon, Oct 5
British Airways Logo
12:25 pm - 7:17 pmEZE  Buenos Aires Ministro Pistarini-EYW Key West
31h 52m3 stops Rio de Janeiro–Galeão Intl London Heathrow Miami
British Airways Logo
1:43 pm - 10:45 amEYW  Key West-EZE Buenos Aires Ministro Pistarini
44h 02m3 stops Miami London Heathrow Rio de Janeiro–Galeão Intl
$13,086British Airways
Thu, Oct 1 - Mon, Oct 5
British Airways Logo
12:25 pm - 7:17 pmEZE  Buenos Aires Ministro Pistarini-EYW Key West
31h 52m3 stops Rio de Janeiro–Galeão Intl London Heathrow Miami
British Airways Logo
1:43 pm - 10:45 amEYW  Key West-EZE Buenos Aires Ministro Pistarini
44h 02m3 stops Miami London Heathrow Rio de Janeiro–Galeão Intl
$13,096British Airways
Thu, Oct 1 - Mon, Oct 5

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United Airlines flights from Buenos Aires to Key West

Our best United Airlines deals on Buenos Aires to Key West flight tickets
United Airlines
Oct 1
EZE9:00 pmBuenos Aires Ministro Pistarini
42h 18m
2 stops
EYW2:18 pmKey West
Oct 5
EYW2:15 pmKey West
40h 45m
2 stops
EZE8:00 amBuenos Aires Ministro Pistarini
$2,150
United Airlines
Oct 1
EZE9:00 pmBuenos Aires Ministro Pistarini
42h 18m
2 stops
EYW2:18 pmKey West
Oct 5
EYW2:15 pmKey West
40h 45m
2 stops
EZE8:00 amBuenos Aires Ministro Pistarini
$2,222
United Airlines
Oct 1
EZE9:00 pmBuenos Aires Ministro Pistarini
41h 29m
2 stops
EYW1:29 pmKey West
Oct 5
EYW2:15 pmKey West
40h 45m
2 stops
EZE8:00 amBuenos Aires Ministro Pistarini
$2,481

British Airways flights from Buenos Aires to Key West

Our best British Airways deals on Buenos Aires to Key West flight tickets
British Airways
Oct 1
EZE12:25 pmBuenos Aires Ministro Pistarini
31h 52m
3 stops
EYW7:17 pmKey West
Oct 5
EYW1:43 pmKey West
44h 02m
3 stops
EZE10:45 amBuenos Aires Ministro Pistarini
$13,064
British Airways
Oct 1
EZE12:25 pmBuenos Aires Ministro Pistarini
31h 52m
3 stops
EYW7:17 pmKey West
Oct 5
EYW1:43 pmKey West
44h 02m
3 stops
EZE10:45 amBuenos Aires Ministro Pistarini
$13,078
British Airways
Oct 1
EZE12:25 pmBuenos Aires Ministro Pistarini
31h 52m
3 stops
EYW7:17 pmKey West
Oct 5
EYW1:43 pmKey West
44h 02m
3 stops
EZE10:45 amBuenos Aires Ministro Pistarini
$13,086

momondo Fare Finder

 
Customize your flight search to find flights from Buenos Aires to Key West 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 August 13, 2026.
Use the filters below to find and compare flights from Buenos Aires to Key West that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Buenos AiresKey West

EZE Buenos Aires Ministro Pistarini - EYW Key West

EZEEYW

Buenos Aires Ministro Pistarini

Thu 10/1

9:00 pm-2:18 pm

2 stops42h 18m

Key West

Mon 10/5

2:15 pm-8:00 am

2 stops40h 45m

$2,150

Buenos AiresKey West

EZE Buenos Aires Ministro Pistarini - EYW Key West

EZEEYW

Buenos Aires Ministro Pistarini

Thu 10/1

9:00 pm-2:18 pm

2 stops42h 18m

Key West

Mon 10/5

2:15 pm-8:00 am

2 stops40h 45m

$2,222

Buenos AiresKey West

EZE Buenos Aires Ministro Pistarini - EYW Key West

EZEEYW

Buenos Aires Ministro Pistarini

Thu 10/1

9:00 pm-1:29 pm

2 stops41h 29m

Key West

Mon 10/5

2:15 pm-8:00 am

2 stops40h 45m

$2,481

Buenos AiresKey West

EZE Buenos Aires Ministro Pistarini - EYW Key West

EZEEYW

Buenos Aires Ministro Pistarini

Thu 10/1

9:00 pm-1:29 pm

2 stops41h 29m

Key West

Mon 10/5

2:15 pm-8:00 am

2 stops40h 45m

$2,554
Quickest round-trip

Buenos AiresKey West

EZE Buenos Aires Ministro Pistarini - EYW Key West

EZEEYW

Buenos Aires Ministro Pistarini

Thu 10/1

12:25 pm-7:17 pm

3 stops31h 52m

Key West

Mon 10/5

1:43 pm-10:45 am

3 stops44h 02m

$13,064

Buenos AiresKey West

EZE Buenos Aires Ministro Pistarini - EYW Key West

EZEEYW

Buenos Aires Ministro Pistarini

Thu 10/1

12:25 pm-7:17 pm

3 stops31h 52m

Key West

Mon 10/5

1:43 pm-10:45 am

3 stops44h 02m

$13,078

Buenos AiresKey West

EZE Buenos Aires Ministro Pistarini - EYW Key West

EZEEYW

Buenos Aires Ministro Pistarini

Thu 10/1

12:25 pm-7:17 pm

3 stops31h 52m

Key West

Mon 10/5

1:43 pm-10:45 am

3 stops44h 02m

$13,086

Buenos AiresKey West

EZE Buenos Aires Ministro Pistarini - EYW Key West

EZEEYW

Buenos Aires Ministro Pistarini

Thu 10/1

12:25 pm-7:17 pm

3 stops31h 52m

Key West

Mon 10/5

1:43 pm-10:45 am

3 stops44h 02m

$13,096

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

When to book flights from Buenos Aires to Key West

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

Cheap Buenos Aires to Key West (BUE to EYW) flight deals and tips

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

Fastest flight time

41h 29m

Direct flights

None
The fastest flight from Buenos Aires to Key West takes 41h 29m
There are no direct flights from Buenos Aires to Key West. There are no popular flight routes from Buenos Aires to Key West.
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Frequently asked questions about flying from Buenos Aires to Key West

  • How far is Buenos Aires to Key West by plane?

    The distance between Buenos Aires and Key West is about 4363.9 mi. Flights usually cover this in 41h 29m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Buenos Aires to Key West Airport?

    Prices for flights from Buenos Aires to Key West Airport are updated daily.

  • How old do you have to be to fly from Buenos Aires to Key West Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Buenos Aires to Key West Airport.

  • What documentation or ID do you need to fly to Key West Airport?

    The travel and health documents you'll need for your trip to Key West Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Key West Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Frequently asked questions about flying from Buenos Aires to Key West

  • How do I get Price Alerts for flights from Buenos Aires to Key West?

    Confirm your travel details to search for the latest offers for flights from Buenos Aires to Key West. While browsing offers there will be the option to toggle “Price Alerts”. You’ll then receive updates when prices for the flight route increase or decrease.

  • How can I save money on flights from Buenos Aires to Key West with momondo?

    By using tools like our “Price Calendar”, you can see the best day to fly round-trip for your travels. Our “Price Forecast” tool uses AI to predict whether you should purchase or hold off on booking for potentially cheaper prices. Explore shows you all flight options from a city or airport to build your own unique adventure. The Discover blog also provides valuable insights for saving money while booking your experience. After searching you can toggle on “Price Alerts” to track prices for your desired flight and book at the ideal moment.

  • How does momondo find its flight prices?

    We compare prices from 700+ competitors to help you find the price that works best for you. momondo operates in over 30 international markets, bringing you access to a wide range of fares and deals. Search for your travel using momondo for a diverse range of options from airlines and OTAs.

Traveling to a place near Key West?

Book flights to Key West if you plan to visit one of these locations
Big Pine Key
Little Torch Key

Why use momondo?

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

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

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

Yes. All flights to Key West from Buenos Aires on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Key West from Buenos Aires.

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

If you are simply researching potential flights to Key West, momondo offers a useful price alert feature which will track prices for flights to Key West from Buenos Aires and alert you when they change.

An easier way to manage your Key West trip

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