How popular is this Louisville to Key Largo flight route?

Flights from Louisville Intl to Key Largo have been viewed 29 times in the past calendar month.

What are the cheapest airlines to fly from Louisville to Key Largo one-way?

To fly one-way, consider booking your trip with Delta, which is currently one of the cheapest options available, starting at $124. Southwest flights start at $146 while deals on United Airlines start at $185 one-way.

In terms of precipitation, rainfall in Key Largo ranges from 1.6 - 9.9 inches per month. September is typically the wettest month, when rainfall can reach 9.9 in. January is typically the driest time to visit Key Largo when rainfall is around 1.6 in.

If weather is an important factor for your trip to Key Largo, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 68.0 F).

What are the cheapest flights from Louisville to Key Largo?

While on average a flight from Louisville to Key Largo is generally $455, our data shows the cheapest flight currently is $134. When looking at the most popular route, (Louisville Intl - Miami), you can expect to pay $211 for that flight.

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 (94%), Qatar Airways (83%), American Airlines (77%).

What are the most popular airlines that fly from Louisville to Key Largo?

Before booking your flight from Louisville to Key Largo check out the most popular airlines for this route: American Airlines, Southwest or Delta.

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 1 outbound flight to Key Largo per day from 7 airlines. Louisville Intl is conveniently located just 5.3 mi from Louisville’s city center.

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.

Find Cheap Flights from Louisville to Key Largo

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Cheapflights Tip: The best prices from Louisville Intl to Key Largo are usually found in August or January, booked 88 days in advance, depart on a Friday or Saturday and return on a Monday

Find flight deals from Louisville to Key Largo

Most accurate provider	FlightHub 3 stars
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Popular in	July
Cheapest in	August
Average price	$424

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Highest demand for flights based on searches. 1% potential increase in price ($5 potential increase over avg. RT price).

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Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).

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Average for round-trip flights in October 2026

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Everything you need to know about your flight from Louisville to Key Largo

What is the cheapest time of day to fly from SDF to KE9?

It’s optimal to fly from Louisville to Key Largo in the afternoon. By choosing this option you can save up to 65% on the cost of your flight, compared to a flight at noon.

Reviews of airlines servicing Key Largo

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.

Southwest

7.9

Good

4,228 reviews

Reviews

1 / 20

8.0

Excellent

Patricia,Oct 2026

DAL - TPA

I love flying southwest, Both flights were packed full full - so not room for all carry one and bags had to be checked but still good flights.

Southwest

7.9

Good

4,228 reviews

Southwest

7.9

Good

4,228 reviews

Reviews

1 / 20

8.0

Excellent

Patricia,Oct 2026

DAL - TPA

I love flying southwest, Both flights were packed full full - so not room for all carry one and bags had to be checked but still good flights.

Delta

7.8

Good

8,652 reviews

Southwest

7.9

Good

4,228 reviews

Reviews

1 / 20

8.0

Excellent

Patricia,Oct 2026

DAL - TPA

I love flying southwest, Both flights were packed full full - so not room for all carry one and bags had to be checked but still good flights.

United Airlines

7.4

Good

10,332 reviews

Southwest

7.9

Good

4,228 reviews

Reviews

1 / 20

8.0

Excellent

Patricia,Oct 2026

DAL - TPA

I love flying southwest, Both flights were packed full full - so not room for all carry one and bags had to be checked but still good flights.

Allegiant Air

7.3

Good

679 reviews

Southwest

7.9

Good

4,228 reviews

Reviews

1 / 20

8.0

Excellent

Patricia,Oct 2026

DAL - TPA

I love flying southwest, Both flights were packed full full - so not room for all carry one and bags had to be checked but still good flights.

American Airlines

7.0

Good

12,150 reviews

Southwest

7.9

Good

4,228 reviews

Reviews

1 / 20

8.0

Excellent

Patricia,Oct 2026

DAL - TPA

I love flying southwest, Both flights were packed full full - so not room for all carry one and bags had to be checked but still good flights.

Related info for your journey

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 1 outbound flight to Key Largo per day from 7 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 29 times in the past calendar month.
What are the cheapest airlines to fly from Louisville to Key Largo one-way?
To fly one-way, consider booking your trip with Delta, which is currently one of the cheapest options available, starting at $124. Southwest flights start at $146 while deals on United Airlines start at $185 one-way.
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 (94%), Qatar Airways (83%), American Airlines (77%).
What are the cheapest flights from Louisville to Key Largo?
While on average a flight from Louisville to Key Largo is generally $455, our data shows the cheapest flight currently is $134. When looking at the most popular route, (Louisville Intl - Miami), you can expect to pay $211 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.

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Top 7 airlines flying from Louisville to Key Largo

Airline	Cheapest	Average	Flexibility	On-time
Allegiant Air	Cheapest$70	Average$186	FlexibilityNo cancel fee	On-time88%
Breeze Airways	Cheapest$91	Average$213	FlexibilityNo cancel fee	On-timeN/A
Delta	Cheapest$176	Average$409	FlexibilityNo cancel fee	On-timeN/A
JetBlue	Cheapest$189	Average$309	FlexibilityNo cancel fee	On-time62%
American Airlines	Cheapest$258	Average$435	FlexibilityNo cancel fee	On-time71%
Southwest	Cheapest$262	Average$427	FlexibilityNo cancel fee	On-time63%
United Airlines	Cheapest$285	Average$399	FlexibilityNo cancel fee	On-time69%

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

Find cheap flights from Louisville to Key Largo with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Find flight deals from Louisville to Key Largo

Most accurate provider

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Popular in

Cheapest in

Average price

Cheapflights Insights

What is the cheapest time of day to fly from SDF to KE9?

It’s optimal to fly from Louisville to Key Largo in the afternoon. By choosing this option you can save up to 65% on the cost of your flight, compared to a flight at noon.

Reviews of airlines servicing Key Largo

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.

Related info for your journey

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

How popular is this Louisville to Key Largo flight route?

What are the cheapest airlines to fly from Louisville to Key Largo one-way?

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

What are the cheapest flights from Louisville to Key Largo?

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

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

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

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 Louisville to Key Largo

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Key Largo by adding a car rental and/or hotel reservation to your travel itinerary.

Search flights from Louisville to Key Largo by cabin class

Find flights from Louisville to Key Largo, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Louisville and Key Largo flights

Browse other Louisville and Key Largo flight options. Last updated on October 10, 2026.

Other flights from Louisville

Browse through other flights departing from Louisville. Flights are based on user searches made on Cheapflights and were last updated on October 10, 2026.

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Top 7 airlines flying from Louisville to Key Largo

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