HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Louisville

$39+ Cheap flights from Illinois to Louisville (SDF)

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 9/23. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SDF
Aug 23 — Aug 301
Sat 8/23
Sat 8/30
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Illinois to Louisville 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.

Cheap flight deals from Illinois to Louisville

Keep the following information in mind while searching for Illinois to Louisville flight deals. Data was last updated August 18, 2025.

Round-trip from

$77
(United Airlines)

One-way from

$39
(Southwest)

Popular in

February

Cheapest in

August

Average price

$173

Good round-trip deal

$139 or less

Good one-way deal

$38 or less
From Illinois to Louisville Intl
Search Deals
One-way flight from Illinois to Louisville Intl
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($60 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($19 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2025
Search Deals
Price to beat on a round-trip flight from Illinois to Louisville Intl.
Search Deals
Price to beat on a one-way flight from Illinois to Louisville Intl.
Search Deals

Find flight deals from Illinois to Louisville

Cheapest flights from Illinois to Louisville
Explore the most affordable flight options available from Illinois to Louisville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 18, 2025.

This United Airlines deal was found by Cheapflights users on 8/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/97:26 amORD - SDF
Nonstop1h 36mUnited Airlines
Tue 9/97:36 pmSDF - ORD
Nonstop1h 49mUnited Airlines
Deal found 8/15$77
This Southwest deal was found by Cheapflights users on 8/15. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/910:05 amMDW - SDF
Nonstop1h 20mSouthwest
Tue 9/97:10 pmSDF - MDW
Nonstop1h 20mSouthwest
Deal found 8/15$77
This Southwest deal was found by Cheapflights users on 8/17. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/161:50 pmORD - SDF
1 stop5h 05mSouthwest
Wed 9/175:30 amSDF - ORD
1 stop7h 20mSouthwest
Deal found 8/17$97
This Southwest deal was found by Cheapflights users on 8/17. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/158:35 pmMDW - SDF
Nonstop1h 15mSouthwest
Wed 9/171:15 pmSDF - MDW
Nonstop1h 15mSouthwest
Deal found 8/17$97
This Southwest deal was found by Cheapflights users on 8/17. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/166:25 amMDW - SDF
2 stops7h 50mSouthwest
Wed 9/173:20 pmSDF - MDW
1 stop7h 10mSouthwest
Deal found 8/17$102
This American Airlines deal was found by Cheapflights users on 8/17. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/87:00 amORD - SDF
Nonstop1h 25mAmerican Airlines
Mon 10/135:53 pmSDF - ORD
Nonstop1h 36mAmerican Airlines
Deal found 8/17$104
This United Airlines deal was found by Cheapflights users on 8/17. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/157:26 amORD - SDF
Nonstop1h 36mUnited Airlines
Wed 9/177:20 amSDF - ORD
Nonstop1h 38mUnited Airlines
Deal found 8/17$114
This United Airlines deal was found by Cheapflights users on 8/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/97:25 amORD - SDF
Nonstop1h 36mUnited Airlines
Mon 10/137:20 pmSDF - ORD
Nonstop1h 49mUnited Airlines
Deal found 8/16$117
This Southwest deal was found by Cheapflights users on 8/16. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/253:30 pmMDW - SDF
Nonstop1h 10mSouthwest
Mon 9/291:15 pmSDF - MDW
Nonstop1h 15mSouthwest
Deal found 8/16$117
This American Airlines deal was found by Cheapflights users on 8/17. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/258:29 pmORD - SDF
Nonstop1h 34mAmerican Airlines
Mon 9/296:12 pmSDF - ORD
Nonstop1h 40mAmerican Airlines
Deal found 8/17$118
This Trip.com deal was found by Cheapflights users on 8/18. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/234:25 pmORD - SDF
Nonstop1h 33mUnited Airlines
Wed 9/2410:55 amSDF - ORD
Nonstop1h 38mUnited Airlines
Deal found 8/18$131
This United Airlines deal was found by Cheapflights users on 8/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/1710:46 amORD - SDF
Nonstop1h 31mUnited Airlines
Wed 9/177:36 pmSDF - ORD
Nonstop1h 49mUnited Airlines
Deal found 8/15$137

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Louisville 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 August 18, 2025.
Use the filters below to find and compare flights from Illinois to Louisville that are best for you.

Fly from

Illinois

Fly to

Louisville

Route

Depart

Return

Price

ChicagoLouisville

MDW - SDF

MDWSDF

Chicago Midway

Tue 9/16

8:25 pm-10:40 pm

Nonstop1h 15m

Louisville Intl

Wed 9/17

1:15 pm-1:30 pm

Nonstop1h 15m

$77

ChicagoLouisville

ORD - SDF

ORDSDF

Chicago O'Hare Intl

Tue 9/9

7:26 am-10:02 am

Nonstop1h 36m

Louisville Intl

Tue 9/9

7:36 pm-8:25 pm

Nonstop1h 49m

$77

ChicagoLouisville

MDW - SDF

MDWSDF

Chicago Midway

Tue 9/9

10:05 am-12:25 pm

Nonstop1h 20m

Louisville Intl

Tue 9/9

7:10 pm-7:30 pm

Nonstop1h 20m

$77

ChicagoLouisville

MDW - SDF

MDWSDF

Chicago Midway

Mon 9/15

8:35 pm-10:50 pm

Nonstop1h 15m

Louisville Intl

Wed 9/17

1:15 pm-1:30 pm

Nonstop1h 15m

$97

ChicagoLouisville

ORD - SDF

ORDSDF

Chicago O'Hare Intl

Tue 9/16

1:50 pm-7:55 pm

1 stop5h 05m

Louisville Intl

Wed 9/17

5:30 am-11:50 am

1 stop7h 20m

$97

ChicagoLouisville

ORD - SDF

ORDSDF

Chicago O'Hare Intl

Wed 10/8

7:00 am-9:25 am

Nonstop1h 25m

Louisville Intl

Mon 10/13

5:53 pm-6:29 pm

Nonstop1h 36m

$104

ChicagoLouisville

ORD - SDF

ORDSDF

Chicago O'Hare Intl

Mon 9/15

7:26 am-10:02 am

Nonstop1h 36m

Louisville Intl

Wed 9/17

7:20 am-7:58 am

Nonstop1h 38m

$114

ChicagoLouisville

ORD - SDF

ORDSDF

Chicago O'Hare Intl

Thu 10/9

6:59 am-9:23 am

Nonstop1h 24m

Louisville Intl

Mon 10/13

2:21 pm-3:00 pm

Nonstop1h 39m

$117

ChicagoLouisville

ORD - SDF

ORDSDF

Chicago O'Hare Intl

Thu 10/2

7:25 am-10:01 am

Nonstop1h 36m

Louisville Intl

Mon 10/6

7:20 pm-8:09 pm

Nonstop1h 49m

$117

ChicagoLouisville

ORD - SDF

ORDSDF

Chicago O'Hare Intl

Sat 9/20

11:41 am-2:03 pm

Nonstop1h 22m

Louisville Intl

Sat 9/20

6:12 pm-6:52 pm

Nonstop1h 40m

$117

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/16

Showing 1-10 of 52 results
1
2
3
...
6

Best time to book a flight from Illinois to Louisville

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

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

Currently, January is the cheapest month in which you can book a flight from Illinois to Louisville (average of $299). Flying from Illinois to Louisville in April is currently the most expensive (average of $369). 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 IL to SDF?

Find hourly flight availability from Illinois to Louisville. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 18, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to Louisville as you normally would.

Weekly flight availability from Illinois to Louisville

Explore weekly flight availability from Illinois to Louisville. 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 August 18, 2025.

The most flights from USIL to SDF are scheduled on a Friday (38 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (8 on average).

Related info for your journey

Find useful and relevant information for your journey from Illinois to Louisville. 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 into for flights to Louisville from Illinois?

    Louisville Intl (SDF), located 5.3 mi from the city center, is the airport you fly into when you book flights from Illinois to Louisville.

  • How long is the flight from Illinois to Louisville?

    There are many flights that can get you from Illinois to Louisville in 1h 15m. Fly via Southwest, United Airlines, or American Airlines to get the fastest option. The distance between Illinois and Louisville is about 271 mi. All flights are typically nonstop.

  • What are the most popular routes from Illinois to Louisville?

    The most popular flight routes from Illinois to Louisville are Chicago O'Hare Intl - Louisville Intl, Chicago Midway - Louisville Intl and Lambert-St Louis - Louisville Intl.

  • What are the most reliable airlines from Illinois to Louisville?

    Before booking your flight to Louisville from Illinois, check out the most reliable airlines to get you to your destination on time: GoJet (98%), Alaska Airlines (87%), Envoy Air( 87%).

  • What are the cheapest flights from Illinois to Louisville?

    Looking for the cheapest flight from Illinois to Louisville? While on average our users pay $201, our data indicates the cheapest price to be $48. The most popular route (Chicago O'Hare Intl - Louisville Intl), is priced around $77.

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

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

  • How can I find direct flights from Illinois to Louisville?

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

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

    Yes. Cheapflights offers flight deals from Illinois to Louisville 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 Illinois to Louisville?

    Currently, January is the cheapest month in which you can book a flight from Illinois to Louisville (average of $299). Flying from Illinois to Louisville in April is currently the most expensive (average of $369). 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.

See more FAQs

Traveling to a place near Louisville?

Book flights to Louisville if you plan to visit one of these locations
Shepherdsville
Jeffersonville
Elizabethtown
Corydon
Bardstown

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 Illinois to Louisville

See prices for flight routes from nearby airports that may be better suited for you.
LaGuardia to Nashville flights
Newark to Nashville flights
John F Kennedy Intl to Nashville flights
Boston to Nashville flights
Los Angeles to Nashville flights
Dallas/Fort Worth to Nashville flights
O'Hare Intl to Nashville flights
Reagan-National to Nashville flights
Seattle to Nashville flights
John F Kennedy Intl to Cincinnati flights
Santa Ana to Nashville flights
San Francisco to Nashville flights
Newark to Cincinnati flights
Denver to Nashville flights
LaGuardia to Cincinnati flights
Ontario to Nashville flights
Seattle to Cincinnati flights
Philadelphia to Nashville flights
Raleigh to Nashville flights
Boston to Cincinnati flights
Fort Lauderdale to Nashville flights
Burbank to Nashville flights
Dallas/Fort Worth to Cincinnati flights
Minneapolis to Nashville flights
Hobby to Nashville flights
Sky Harbor Intl to Nashville flights
Newark to Louisville flights
Orlando to Nashville flights
O'Hare Intl to Knoxville flights
LaGuardia to Louisville flights
Dulles Intl to Nashville flights
Baltimore to Nashville flights
LaGuardia to Knoxville flights
Denver to Cincinnati flights
Detroit to Nashville flights
George Bush Intcntl to Nashville flights
Atlanta to Cincinnati flights
Dallas/Fort Worth to Louisville flights
Fresno to Lexington flights
Sacramento to Nashville flights
Miami to Nashville flights
Providence to Nashville flights
George Bush Intcntl to Knoxville flights
Sky Harbor Intl to Cincinnati flights
Portland to Nashville flights
San Diego to Nashville flights
Tampa to Nashville flights
Hobby to Knoxville flights
John F Kennedy Intl to Louisville flights
Hobby to Cincinnati flights

Top 3 airlines flying from Illinois to Louisville

Discover the top 3 airlines that operate flights from Illinois to Louisville. 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 August 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$124Average$517FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$132Average$291FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$137Average$385FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.