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Key Largo

$90+ Cheap flights from Louisville (SDF) to Key Largo, FL

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 12/7. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — MIA
Dec 6 — Dec 131
Sat 12/6
Sat 12/13
1 adult, Economy
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Cheapflights Tip: The best prices from Louisville Intl to Key Largo are usually found in August or February, booked 36 days in advance, depart on a Friday or Tuesday and return on a Friday

Cheap flight deals from Louisville to Key Largo

Keep the following information in mind while searching for Louisville to Key Largo flight deals. Data was last updated November 6, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$189
(American Airlines)

One-way from

$90
(Kiwi.com)

Popular in

December

Cheapest in

August

Average price

$358
Provider with most accurate pricing for Louisville Intl-Miami flight deals.
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Provider most trusted by Cheapflights users for Louisville Intl-Miami flights.
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From Louisville Intl to Key Largo
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One-way flight from Louisville Intl to Key Largo
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Highest demand for flights based on searches. 5% potential increase in price ($21 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($7 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Find flight deals from Louisville to Key Largo

Cheapest flights from Louisville to Key Largo
Explore the most affordable flight options available from Louisville to Key Largo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 6, 2025.

This Delta deal was found by Cheapflights users on 11/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/66:11 pmSDF - MIA
1 stop6h 35mDelta
Sat 12/136:00 amMIA - SDF
1 stop4h 19mDelta
Deal found 11/6$197
This American Airlines deal was found by Cheapflights users on 11/6. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/96:00 amSDF - MIA
Nonstop2h 37mAmerican Airlines
Tue 12/163:35 pmMIA - SDF
1 stop7h 21mAmerican Airlines
Deal found 11/6$207
This Southwest deal was found by Cheapflights users on 11/5. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/81:10 pmSDF - MIA
1 stop6h 40mSouthwest
Fri 12/126:55 amMIA - SDF
1 stop4h 25mSouthwest
Deal found 11/5$217
This Kiwi.com deal was found by Cheapflights users on 11/5. 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 12/72:55 pmSDF - MIA
1 stop26h 41mMultiple Airlines
Sun 12/148:30 amMIA - SDF
2 stops26h 30mMultiple Airlines
Deal found 11/5$220
This Southwest deal was found by Cheapflights users on 11/5. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/93:20 pmSDF - MIA
1 stop5h 25mSouthwest
Tue 12/167:10 amMIA - SDF
2 stops9h 25mSouthwest
Deal found 11/5$222
This Delta deal was found by Cheapflights users on 11/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/108:35 amSDF - MIA
1 stop7h 15mDelta
Mon 12/157:30 pmMIA - SDF
1 stop4h 29mDelta
Deal found 11/6$226
This Kiwi.com deal was found by Cheapflights users on 11/4. 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.
Thu 12/43:55 pmSDF - MIA
1 stop25h 41mMultiple Airlines
Sun 12/75:05 amMIA - SDF
2 stops34h 31mMultiple Airlines
Deal found 11/4$232
This Kiwi.com deal was found by Cheapflights users on 11/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/177:46 pmSDF - MIA
2 stops17h 42mMultiple Airlines
Thu 11/209:05 amMIA - SDF
1 stop5h 10mMultiple Airlines
Deal found 11/6$234
This American Airlines deal was found by Cheapflights users on 11/5. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/76:00 amSDF - MIA
Nonstop2h 37mAmerican Airlines
Sun 12/149:16 pmMIA - SDF
Nonstop2h 38mAmerican Airlines
Deal found 11/5$235
This American Airlines deal was found by Cheapflights users on 11/6. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/104:18 pmSDF - MIA
1 stop6h 00mAmerican Airlines
Mon 12/159:16 pmMIA - SDF
Nonstop2h 38mAmerican Airlines
Deal found 11/6$245
This Kiwi.com deal was found by Cheapflights users on 11/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/142:55 pmSDF - MIA
1 stop26h 41mMultiple Airlines
Sat 12/2010:19 pmMIA - SDF
2 stops25h 40mMultiple Airlines
Deal found 11/6$248
This Delta deal was found by Cheapflights users on 11/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/117:59 pmSDF - MIA
1 stop4h 47mDelta
Mon 12/157:00 amMIA - SDF
1 stop7h 11mDelta
Deal found 11/4$255

Cheapflights Fare Finder

 
Customize your flight search to find flights from Louisville to Key Largo 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 6, 2025.
Use the filters below to find and compare flights from Louisville to Key Largo that are best for you.

Fly from

Louisville

Fly to

Key Largo

Route

Depart

Return

Price

LouisvilleMiami

SDF - MIA

SDFMIA

Louisville Intl

Thu 1/29

5:35 am-10:40 am

1 stop5h 05m

Miami

Mon 2/2

7:25 pm-11:50 pm

1 stop4h 25m

$197

LouisvilleMiami

SDF - MIA

SDFMIA

Louisville Intl

Sat 1/17

3:37 pm-10:48 pm

1 stop7h 11m

Miami

Sat 1/24

6:00 am-11:35 am

1 stop5h 35m

$239

LouisvilleMiami

SDF - MIA

SDFMIA

Louisville Intl

Sat 1/24

5:47 pm-12:51 am

1 stop7h 04m

Miami

Thu 1/29

4:32 pm-11:50 pm

1 stop7h 18m

$239

LouisvilleMiami

SDF - MIA

SDFMIA

Louisville Intl

Tue 2/3

5:47 pm-12:51 am

1 stop7h 04m

Miami

Mon 2/9

7:25 pm-11:50 pm

1 stop4h 25m

$259

LouisvilleMiami

SDF - MIA

SDFMIA

Louisville Intl

Mon 12/8

11:45 am-9:50 pm

2 stops10h 05m

Miami

Fri 12/12

6:55 am-11:20 am

1 stop4h 25m

$260

LouisvilleMiami

SDF - MIA

SDFMIA

Louisville Intl

Wed 12/17

4:18 pm-10:18 pm

1 stop6h 00m

Miami

Wed 12/24

9:20 pm-11:59 pm

Nonstop2h 39m

$263

LouisvilleMiami

SDF - MIA

SDFMIA

Louisville Intl

Tue 12/9

11:45 am-9:50 pm

2 stops10h 05m

Miami

Tue 12/16

7:10 am-4:35 pm

2 stops9h 25m

$265

LouisvilleMiami

SDF - MIA

SDFMIA

Louisville Intl

Sun 1/4

6:51 pm-12:48 am

1 stop5h 57m

Miami

Fri 1/30

8:15 am-2:36 pm

1 stop6h 21m

$265

LouisvilleMiami

SDF - MIA

SDFMIA

Louisville Intl

Wed 11/19

2:22 pm-9:38 pm

1 stop7h 16m

Miami

Mon 11/24

8:05 am-2:04 pm

1 stop5h 59m

$280

LouisvilleMiami

SDF - MIA

SDFMIA

Louisville Intl

Thu 1/29

6:00 am-8:55 am

Nonstop2h 55m

Miami

Mon 2/2

8:25 am-11:15 am

Nonstop2h 50m

$299

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/5

Showing 1-10 of 20 results
1
2

Best time to book a flight from Louisville to Key Largo

Have a flexible travel schedule? Discover the best time to fly to Key Largo from Louisville 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 Louisville to Key Largo

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

Use this chart to determine the optimal time to book a round-trip flight from Louisville to Key Largo. Price data was last updated on October 31, 2025.

The price you pay for your flight from Louisville to Key Largo may vary depending on when you book. For the best chance of a lower fare, look to book 36 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, December is the cheapest month in which you can book a flight from Louisville to Key Largo (average of $44). Flying from Louisville to Key Largo in June is currently the most expensive (average of $76). 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 SDF to KE9?

Find hourly flight availability from Louisville to Key Largo. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 6, 2025.

It’s optimal to fly from Louisville to Key Largo in the evening. By choosing this option you can save up to 12% on the cost of your flight, compared to a flight at noon.

What is the cheapest day to fly from Louisville to Key Largo?

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

Travelers seeking maximum savings on their Louisville to Key Largo flight should consider departing on Monday mornings when fares are most often at their lowest. Wednesday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Louisville to Key Largo

Explore weekly flight availability from Louisville to Key Largo. 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 6, 2025.

The most flights from SDF to KE9 are scheduled on a Monday (2 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (2 on average).

Reviews of airlines servicing Key Largo

Get insights into the airlines that provide service to Key Largo. 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 Key Largo. Reviews last updated November 6, 2025.
Get a feel of what it's like to fly with Southwest, Delta, and United Airlines from Louisville to Key Largo by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,241 reviews

Crew

8.6

Food

7.0

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,241 reviews
Southwest
8.0
Very good
4,241 reviews

Crew

8.6

Food

7.0

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Delta
7.9
Good
8,001 reviews
Southwest
8.0
Very good
4,241 reviews

Crew

8.6

Food

7.0

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
United Airlines
7.4
Good
9,007 reviews
Southwest
8.0
Very good
4,241 reviews

Crew

8.6

Food

7.0

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
American Airlines
7.2
Good
11,040 reviews
Southwest
8.0
Very good
4,241 reviews

Crew

8.6

Food

7.0

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Spirit Airlines
6.3
Okay
8,122 reviews
Southwest
8.0
Very good
4,241 reviews

Crew

8.6

Food

7.0

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Related info for your journey

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

  • What airport do you fly from for flights from Louisville to Key Largo?

    Most people fly from Louisville Intl (SDF) if they book a flight from Louisville to Key Largo. On average, Louisville Intl has 2 outbound flights to Key Largo per day from 6 airlines. Louisville Intl is conveniently located just 5.3 mi from Louisville’s city center.

  • How popular is this Louisville to Key Largo flight route?

    Flights from Louisville Intl to Key Largo have been viewed 4 times in the past calendar month.

  • How long is the flight from Louisville to Key Largo?

    Airlines like Delta fly from Louisville to Key Largo in about 5h 05m. The time it takes to get you to your destination can typically vary by up to . Louisville and Key Largo are separated by a distance of 912 mi.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Louisville to Key Largo on time: Envoy Air (100%), American Airlines (94%), Qatar Airways (94%).

  • What are the cheapest flights from Louisville to Key Largo?

    While on average a flight from Louisville to Key Largo is generally $636, our data shows the cheapest flight currently is $106. When looking at the most popular route, (Louisville Intl - Miami), you can expect to pay $197 for that flight.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Louisville to Key Largo 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 Louisville to Key Largo?

    Currently, December is the cheapest month in which you can book a flight from Louisville to Key Largo (average of $44). Flying from Louisville to Key Largo in June is currently the most expensive (average of $76). 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.

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Top 6 airlines flying from Louisville to Key Largo

Discover the top 6 airlines that operate flights from Louisville to Key Largo. 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 6, 2025.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$76Average$121FlexibilityNo cancel feeOn-time88%
Spirit AirlinesCheapest$85Average$176FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$196Average$393FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$197Average$371FlexibilityNo cancel feeOn-time63%
DeltaCheapest$198Average$366FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$305Average$377FlexibilityNo cancel feeOn-time69%

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