$99+ 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 5/20. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — MIA
May 3 — May 101
Round-trip
1 adult, Economy
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Find cheap flights from Louisville to Key Largo 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 Louisville Intl to Key Largo are usually found in August or September, booked 36 days in advance, depart on a Friday or Saturday and return on a Wednesday
Cheap flight deals from Louisville to Key Largo
Cheapest
Best
Last-minute
One-way
Cheapest flights from Louisville to Key LargoExplore 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 April 3, 2026.
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 April 3, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/30. 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.
Wed 5/68:06 pm
SDF
- MIA
1 stop14h 21m
Multiple Airlines
Thu 5/1411:06 am
MIA
- SDF
2 stops31h 52m
Multiple Airlines
Deal found 3/30![Multiple Airlines logo]()
$251
This Kiwi.com deal was found by Cheapflights users on 4/1. 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.
Sat 5/168:06 pm
SDF
- MIA
1 stop14h 21m
Multiple Airlines
Sat 5/235:22 pm
MIA
- SDF
2 stops20h 05m
Multiple Airlines
Deal found 4/1![Multiple Airlines logo]()
$254
This Kiwi.com deal was found by Cheapflights users on 3/30. 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.
Sat 5/308:06 pm
SDF
- MIA
2 stops17h 14m
Multiple Airlines
Fri 6/55:05 am
MIA
- SDF
1 stop27h 31m
Multiple Airlines
Deal found 3/30![Multiple Airlines logo]()
$256
This Kiwi.com deal was found by Cheapflights users on 3/29. 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.
Sat 6/138:06 pm
SDF
- MIA
1 stop14h 10m
Multiple Airlines
Mon 6/224:08 pm
MIA
- SDF
2 stops43h 22m
Multiple Airlines
Deal found 3/29![Multiple Airlines logo]()
$263
This Mytrip deal was found by Cheapflights users on 3/31. 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 4/246:06 pm
SDF
- MIA
2 stops26h 32m
Spirit Airlines
Sat 5/25:30 pm
MIA
- SDF
1 stop17h 15m
Spirit Airlines
Deal found 3/31![Spirit Airlines logo]()
$268
This Kiwi.com deal was found by Cheapflights users on 3/29. 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.
Sat 6/138:06 pm
SDF
- MIA
1 stop14h 10m
Multiple Airlines
Tue 6/234:08 pm
MIA
- SDF
2 stops19h 22m
Multiple Airlines
Deal found 3/29![Multiple Airlines logo]()
$269
This Mytrip deal was found by Cheapflights users on 4/2. 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 4/276:06 pm
SDF
- MIA
2 stops28h 25m
Spirit Airlines
Thu 4/303:54 pm
MIA
- SDF
2 stops25h 10m
Spirit Airlines
Deal found 4/2![Spirit Airlines logo]()
$270
This Mytrip deal was found by Cheapflights users on 4/1. 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 5/16:06 pm
SDF
- MIA
2 stops18h 50m
Spirit Airlines
Sun 5/33:54 pm
MIA
- SDF
2 stops17h 34m
Spirit Airlines
Deal found 4/1![Spirit Airlines logo]()
$276
This Kiwi.com deal was found by Cheapflights users on 4/2. 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.
Wed 5/68:06 pm
SDF
- MIA
1 stop14h 21m
Multiple Airlines
Thu 5/78:53 pm
MIA
- SDF
2 stops22h 05m
Multiple Airlines
Deal found 4/2![Multiple Airlines logo]()
$278
Best flights from Louisville to Key LargoDiscover carefully curated flight deals from Louisville to Key Largo that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 3, 2026.
Discover carefully curated flight deals from Louisville to Key Largo that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 3, 2026.
This Southwest deal was found by Cheapflights users on 4/2. 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.
Sat 5/93:15 pm
SDF
- MIA
1 stop5h 05m
Southwest
Mon 5/186:25 pm
MIA
- SDF
1 stop5h 20m
Southwest
Deal found 4/2![Southwest logo]()
$348
This Delta deal was found by Cheapflights users on 3/31. 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.
Mon 6/84:40 pm
SDF
- MIA
1 stop5h 21m
Delta
Sat 6/136:00 am
MIA
- SDF
1 stop4h 32m
Delta
Deal found 3/31![Delta logo]()
$376
This United Airlines deal was found by Cheapflights users on 4/1. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/129:10 am
SDF
- MIA
2 stops13h 49m
United Airlines
Wed 5/1312:10 pm
MIA
- SDF
1 stop8h 07m
United Airlines
Deal found 4/1![United Airlines logo]()
$406
This Southwest deal was found by Cheapflights users on 4/2. 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.
Fri 6/55:30 pm
SDF
- MIA
1 stop4h 35m
Southwest
Mon 6/85:35 am
MIA
- SDF
1 stop4h 35m
Southwest
Deal found 4/2![Southwest logo]()
$375
This Delta deal was found by Cheapflights users on 4/2. 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 5/303:29 pm
SDF
- MIA
1 stop5h 58m
Delta
Fri 6/55:51 pm
MIA
- SDF
1 stop6h 34m
Delta
Deal found 4/2![Delta logo]()
$376
This United Airlines deal was found by Cheapflights users on 3/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/65:35 am
SDF
- MIA
2 stops10h 39m
United Airlines
Wed 6/104:06 pm
MIA
- SDF
1 stop6h 24m
United Airlines
Deal found 3/29![United Airlines logo]()
$406
This Southwest deal was found by Cheapflights users on 3/29. 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 4/148:55 am
SDF
- MIA
2 stops12h 15m
Southwest
Tue 4/2112:35 pm
MIA
- SDF
2 stops9h 40m
Southwest
Deal found 3/29![Southwest logo]()
$395
This Delta deal was found by Cheapflights users on 3/29. 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 4/302:16 pm
SDF
- MIA
1 stop8h 36m
Delta
Mon 5/47:41 pm
MIA
- SDF
1 stop4h 18m
Delta
Deal found 3/29![Delta logo]()
$403
This Southwest deal was found by Cheapflights users on 4/2. 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.
Sun 6/146:25 pm
SDF
- MIA
1 stop3h 55m
Southwest
Fri 6/196:20 am
MIA
- SDF
1 stop6h 10m
Southwest
Deal found 4/2![Southwest logo]()
$409
This Delta deal was found by Cheapflights users on 3/29. 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 6/117:05 am
SDF
- MIA
1 stop16h 36m
Delta
Wed 6/178:01 am
MIA
- SDF
1 stop5h 38m
Delta
Deal found 3/29![Delta logo]()
$418
This Southwest deal was found by Cheapflights users on 3/31. 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.
Fri 8/143:20 pm
SDF
- MIA
2 stops6h 45m
Southwest
Tue 8/187:10 am
MIA
- SDF
2 stops8h 05m
Southwest
Deal found 3/31![Southwest logo]()
$419
Last-minute flights from Louisville to Key LargoDiscover last-minute flight deals from Louisville to Key Largo. Data last updated April 3, 2026 and is based on user searches.
Discover last-minute flight deals from Louisville to Key Largo. Data last updated April 3, 2026 and is based on user searches.
This Mytrip deal was found by Cheapflights users on 3/31. 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 4/246:06 pm
SDF
- MIA
2 stops26h 32m
Spirit Airlines
Sat 5/25:30 pm
MIA
- SDF
1 stop17h 15m
Spirit Airlines
Deal found 3/31![Spirit Airlines logo]()
$268
This Mytrip deal was found by Cheapflights users on 4/2. 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 4/276:06 pm
SDF
- MIA
2 stops28h 25m
Spirit Airlines
Thu 4/303:54 pm
MIA
- SDF
2 stops25h 10m
Spirit Airlines
Deal found 4/2![Spirit Airlines logo]()
$270
This Mytrip deal was found by Cheapflights users on 4/1. 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 5/16:06 pm
SDF
- MIA
2 stops18h 50m
Spirit Airlines
Sun 5/33:54 pm
MIA
- SDF
2 stops17h 34m
Spirit Airlines
Deal found 4/1![Spirit Airlines logo]()
$276
This Kiwi.com deal was found by Cheapflights users on 3/30. 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.
Wed 5/68:06 pm
SDF
- MIA
1 stop14h 21m
Multiple Airlines
Thu 5/1411:06 am
MIA
- SDF
2 stops31h 52m
Multiple Airlines
Deal found 3/30![Multiple Airlines logo]()
$251
This Kiwi.com deal was found by Cheapflights users on 4/2. 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.
Wed 5/68:06 pm
SDF
- MIA
1 stop14h 21m
Multiple Airlines
Thu 5/78:53 pm
MIA
- SDF
2 stops22h 05m
Multiple Airlines
Deal found 4/2![Multiple Airlines logo]()
$278
This Kiwi.com deal was found by Cheapflights users on 4/1. 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.
Sat 5/168:06 pm
SDF
- MIA
1 stop14h 21m
Multiple Airlines
Sat 5/235:22 pm
MIA
- SDF
2 stops20h 05m
Multiple Airlines
Deal found 4/1![Multiple Airlines logo]()
$254
This Kiwi.com deal was found by Cheapflights users on 4/1. 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.
Sat 5/168:06 pm
SDF
- MIA
1 stop14h 21m
Multiple Airlines
Thu 5/215:05 am
MIA
- SDF
1 stop8h 22m
Multiple Airlines
Deal found 4/1![Multiple Airlines logo]()
$279
This Kiwi.com deal was found by Cheapflights users on 3/30. 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.
Sat 5/308:06 pm
SDF
- MIA
2 stops17h 14m
Multiple Airlines
Fri 6/55:05 am
MIA
- SDF
1 stop27h 31m
Multiple Airlines
Deal found 3/30![Multiple Airlines logo]()
$256
This Kiwi.com deal was found by Cheapflights users on 3/31. 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 5/316:55 pm
SDF
- MIA
2 stops15h 32m
Multiple Airlines
Fri 6/55:05 am
MIA
- SDF
1 stop27h 31m
Multiple Airlines
Deal found 3/31![Multiple Airlines logo]()
$282
One-way flights from Louisville to Key LargoSearch for one-way flight options from Louisville to Key Largo. Find affordable one-way fares based on user searches. Data last updated April 3, 2026.
Search for one-way flight options from Louisville to Key Largo. Find affordable one-way fares based on user searches. Data last updated April 3, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/29. 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.
Wed 5/208:06 pm
SDF
- MIA
1 stop14h 21m
Multiple Airlines
Deal found 3/29![Multiple Airlines logo]()
$99
This Kiwi.com deal was found by Cheapflights users on 4/2. 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 4/199:12 pm
SDF
- MIA
2 stops25h 19m
Multiple Airlines
Deal found 4/2![Multiple Airlines logo]()
$103
This Kiwi.com deal was found by Cheapflights users on 3/29. 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 5/282:27 pm
SDF
- MIA
1 stop20h 00m
Multiple Airlines
Deal found 3/29![Multiple Airlines logo]()
$104
This Kiwi.com deal was found by Cheapflights users on 3/29. 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.
Fri 4/247:48 pm
SDF
- MIA
2 stops18h 22m
Multiple Airlines
Deal found 3/29![Multiple Airlines logo]()
$107
This Kiwi.com deal was found by Cheapflights users on 3/31. 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 4/276:06 pm
SDF
- MIA
2 stops30h 43m
Multiple Airlines
Deal found 3/31![Multiple Airlines logo]()
$114
This Kiwi.com deal was found by Cheapflights users on 3/30. 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 4/162:26 pm
SDF
- MIA
1 stop20h 52m
Multiple Airlines
Deal found 3/30![Multiple Airlines logo]()
$122
This Kiwi.com deal was found by Cheapflights users on 3/30. 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.
Fri 5/17:48 pm
SDF
- MIA
2 stops18h 27m
Multiple Airlines
Deal found 3/30![Multiple Airlines logo]()
$125
This Kiwi.com deal was found by Cheapflights users on 3/29. 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.
Sat 5/308:06 pm
SDF
- MIA
1 stop14h 21m
Multiple Airlines
Deal found 3/29![Multiple Airlines logo]()
$127
This Kiwi.com deal was found by Cheapflights users on 3/29. 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.
Wed 5/278:06 pm
SDF
- MIA
1 stop14h 21m
Multiple Airlines
Deal found 3/29![Multiple Airlines logo]()
$129
Find 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 April 3, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $251 (Kiwi.com) |
One-way from | $99 (Kiwi.com) |
Popular in | December |
Cheapest in | August |
Average price | $370 |
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 April 3, 2026.
Use the filters below to find and compare flights from Louisville to Key Largo that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
LouisvilleMiami
SDF - MIA
SDFMIA
Louisville Intl
Sat 5/9
3:15 pm-8:20 pm
1 stop5h 05m
Miami
Mon 5/18
6:25 pm-11:45 pm
1 stop5h 20m
$348
Quickest round-trip
LouisvilleMiami
SDF - MIA
SDFMIA
Louisville Intl
Fri 6/5
5:30 pm-10:05 pm
1 stop4h 35m
Miami
Mon 6/8
5:35 am-10:10 am
1 stop4h 35m
$375
LouisvilleMiami
SDF - MIA
SDFMIA
Louisville Intl
Mon 6/8
4:40 pm-10:01 pm
1 stop5h 21m
Miami
Sat 6/13
6:00 am-10:32 am
1 stop4h 32m
$376
LouisvilleMiami
SDF - MIA
SDFMIA
Louisville Intl
Sat 5/30
3:29 pm-9:27 pm
1 stop5h 58m
Miami
Fri 6/5
5:51 pm-12:25 am
1 stop6h 34m
$376
LouisvilleMiami
SDF - MIA
SDFMIA
Louisville Intl
Tue 4/14
8:55 am-9:10 pm
2 stops12h 15m
Miami
Tue 4/21
12:35 pm-10:15 pm
2 stops9h 40m
$395
LouisvilleMiami
SDF - MIA
SDFMIA
Louisville Intl
Thu 4/30
2:16 pm-10:52 pm
1 stop8h 36m
Miami
Mon 5/4
7:41 pm-11:59 pm
1 stop4h 18m
$403
LouisvilleMiami
SDF - MIA
SDFMIA
Louisville Intl
Tue 5/12
9:10 am-10:59 pm
2 stops13h 49m
Miami
Wed 5/13
12:10 pm-8:17 pm
1 stop8h 07m
$406
LouisvilleMiami
SDF - MIA
SDFMIA
Louisville Intl
Sat 6/6
5:35 am-4:14 pm
2 stops10h 39m
Miami
Wed 6/10
4:06 pm-10:30 pm
1 stop6h 24m
$406
LouisvilleMiami
SDF - MIA
SDFMIA
Louisville Intl
Sun 6/14
6:25 pm-10:20 pm
1 stop3h 55m
Miami
Fri 6/19
6:20 am-12:30 pm
1 stop6h 10m
$409
LouisvilleMiami
SDF - MIA
SDFMIA
Louisville Intl
Thu 6/11
7:05 am-11:41 pm
1 stop16h 36m
Miami
Wed 6/17
8:01 am-1:39 pm
1 stop5h 38m
$418
Showing 1-10 of 18 resultsSorted by cheapest first
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.
SDF-MIA
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
SDF-KE9
SDF-MIA
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 April 2, 2026.
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, May is the cheapest month in which you can book a flight from Louisville to Key Largo (average of $60). Flying from Louisville to Key Largo in March is currently the most expensive (average of $89). 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 April 3, 2026.
It’s optimal to fly from Louisville to Key Largo in the evening. By choosing this option you can save up to 69% on the cost of your flight, compared to a flight at noon.
How much does it cost to fly round-trip from Louisville to Key Largo?
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 April 3, 2026.
Get a feel of what it's like to fly with Southwest,Delta, andUnited 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.
Crew
8.6
Food
7.0
Overall
8.0
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Food
7.0
Overall
8.0
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Food
7.0
Overall
8.0
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Food
7.0
Overall
8.0
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Food
7.0
Overall
8.0
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Food
7.0
Overall
8.0
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Related info for your journey
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Louisville and Key Largo flights
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Top 7 airlines flying from Louisville to Key Largo
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| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$70 | Average$117 | FlexibilityNo cancel fee | On-time88% | |
| Cheapest$72 | Average$178 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$189 | Average$294 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$198 | Average$366 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$199 | Average$361 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$205 | Average$392 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$279 | Average$355 | FlexibilityNo cancel fee | On-time69% |