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$89+ 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 8/4. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SDF
Aug 12 — Aug 191
Wed 8/12
Wed 8/19
1 adult, Economy
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Cheap 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 July 13, 2026.

This United Airlines deal was found by Cheapflights users on 7/8. 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 8/195:59 pm
ORD
-
SDF
Nonstop1h 37m
United Airlines
Wed 8/267:10 am
SDF
-
ORD
Nonstop1h 40m
United Airlines
Deal found 7/8$177
This Southwest deal was found by Cheapflights users on 7/10. 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 8/248:00 am
MDW
-
SDF
Nonstop1h 25m
Southwest
Mon 8/312:15 pm
SDF
-
MDW
Nonstop1h 15m
Southwest
Deal found 7/10$177
This American Airlines deal was found by Cheapflights users on 7/8. 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.
Sat 8/226:50 pm
ORD
-
SDF
Nonstop1h 35m
American Airlines
Sat 8/296:28 am
SDF
-
ORD
Nonstop1h 47m
American Airlines
Deal found 7/8$178
This Southwest deal was found by Cheapflights users on 7/9. 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 8/157:50 am
MDW
-
SDF
Nonstop1h 20m
Southwest
Mon 8/172:15 pm
SDF
-
MDW
Nonstop1h 15m
Southwest
Deal found 7/9$189
This Southwest deal was found by Cheapflights users on 7/8. 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 8/227:50 am
MDW
-
SDF
Nonstop1h 20m
Southwest
Sat 8/2912:05 pm
SDF
-
MDW
1 stop8h 15m
Southwest
Deal found 7/8$193
This Delta deal was found by Cheapflights users on 7/8. 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 8/68:48 am
ORD
-
SDF
1 stop4h 03m
Delta
Mon 8/102:34 pm
SDF
-
ORD
1 stop6h 56m
Delta
Deal found 7/8$196
This Delta deal was found by Cheapflights users on 7/8. 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 8/69:24 am
MDW
-
SDF
1 stop3h 27m
Delta
Mon 8/102:34 pm
SDF
-
MDW
1 stop4h 59m
Delta
Deal found 7/8$196
This Delta deal was found by Cheapflights users on 7/10. 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 10/18:55 am
ORD
-
SDF
1 stop4h 12m
Delta
Thu 10/222:31 pm
SDF
-
ORD
1 stop4h 54m
Delta
Deal found 7/10$197
This Delta deal was found by Cheapflights users on 7/10. 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 10/19:29 am
MDW
-
SDF
1 stop3h 38m
Delta
Tue 10/202:31 pm
SDF
-
MDW
1 stop4h 34m
Delta
Deal found 7/10$197
This United Airlines deal was found by Cheapflights users on 7/9. 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 9/167:15 am
ORD
-
SDF
Nonstop1h 42m
United Airlines
Mon 9/2111:00 am
SDF
-
ORD
Nonstop1h 42m
United Airlines
Deal found 7/9$198
This Southwest deal was found by Cheapflights users on 7/8. 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 8/66:10 pm
MDW
-
SDF
Nonstop1h 15m
Southwest
Mon 8/102:15 pm
SDF
-
MDW
Nonstop1h 15m
Southwest
Deal found 7/8$201
This United Airlines deal was found by Cheapflights users on 7/9. 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 9/174:30 pm
ORD
-
SDF
Nonstop1h 37m
United Airlines
Sat 9/199:00 am
SDF
-
ORD
Nonstop1h 41m
United Airlines
Deal found 7/9$202

Find flight deals from Illinois to Louisville

Keep the following information in mind while searching for Illinois to Louisville flight deals. Data was last updated July 13, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$177
(Southwest)

One-way from

$89
(American Airlines)

Popular in

May

Cheapest in

August

Average price

$465

Good round-trip deal

$281 or less

Good one-way deal

$196 or less
Provider with most accurate pricing for Chicago (CHI)-Louisville Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Louisville Intl flights.
Search Deals
From Illinois to Louisville Intl
Search Deals
One-way flight from Illinois to Louisville Intl
Search Deals
Highest demand for flights based on searches. 25% potential increase in price ($118 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
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

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 July 13, 2026.
Use the filters below to find and compare flights from Illinois to Louisville that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoLouisville

MDW - SDF

MDWSDF

Chicago Midway

Sat 8/22

3:15 pm-5:25 pm

Nonstop1h 10m

Louisville Intl

Sat 8/29

6:45 am-1:20 pm

2 stops7h 35m

$192

ChicagoLouisville

MDW - SDF

MDWSDF

Chicago Midway

Mon 8/24

8:00 am-10:25 am

Nonstop1h 25m

Louisville Intl

Mon 8/31

3:20 pm-9:55 pm

2 stops7h 35m

$192
Quickest round-trip

ChicagoLouisville

MDW - SDF

MDWSDF

Chicago Midway

Thu 8/6

6:10 pm-8:25 pm

Nonstop1h 15m

Louisville Intl

Mon 8/10

2:15 pm-2:30 pm

Nonstop1h 15m

$201

ChicagoLouisville

MDW - SDF

MDWSDF

Chicago Midway

Wed 8/26

6:20 pm-8:35 pm

Nonstop1h 15m

Louisville Intl

Wed 9/2

1:15 pm-1:30 pm

Nonstop1h 15m

$217

St. LouisLouisville

STL - SDF

STLSDF

Lambert-St Louis

Wed 8/19

12:59 pm-7:07 pm

1 stop5h 08m

Louisville Intl

Sat 8/22

9:00 am-12:03 pm

1 stop4h 03m

$219

St. LouisLouisville

STL - SDF

STLSDF

Lambert-St Louis

Sat 8/22

10:33 am-4:41 pm

1 stop5h 08m

Louisville Intl

Sat 8/29

5:21 pm-8:42 pm

1 stop4h 21m

$219

St. LouisLouisville

STL - SDF

STLSDF

Lambert-St Louis

Thu 8/6

4:15 pm-10:35 pm

1 stop5h 20m

Louisville Intl

Mon 8/10

4:10 pm-10:20 pm

1 stop7h 10m

$219

ChicagoLouisville

MDW - SDF

MDWSDF

Chicago Midway

Wed 8/19

6:20 pm-8:35 pm

Nonstop1h 15m

Louisville Intl

Wed 8/26

7:05 am-10:50 am

1 stop4h 45m

$227

ChicagoLouisville

ORD - SDF

ORDSDF

Chicago O'Hare Intl

Sat 12/5

11:30 am-5:40 pm

1 stop5h 10m

Louisville Intl

Mon 12/7

7:20 am-10:33 am

1 stop4h 13m

$237

ChicagoLouisville

MDW - SDF

MDWSDF

Chicago Midway

Tue 8/25

12:45 pm-9:30 pm

2 stops7h 45m

Louisville Intl

Tue 9/1

7:05 am-10:50 am

1 stop4h 45m

$242

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/10

Showing 1-10 of 60 resultsSorted by cheapest first
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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, August is the cheapest month in which you can book a flight from Illinois to Louisville (average of $77). Flying from Illinois to Louisville in July is currently the most expensive (average of $257). 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 July 13, 2026.

One of the essential ways to save on airfare from Illinois to Louisville is to remain as flexible as possible. Flights that are in the evening tend to be the most expensive. A flight in the morning could potentially save you up to 11% on airfare.

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 July 13, 2026.

The most flights from USIL to SDF are scheduled on a Monday (36 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (33 on average).

How much does it cost to fly round-trip from Illinois to Louisville?

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

Booking 81 days in advance of your planned departure date is, on average, the best time to get cheap flights from Illinois to Louisville. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest day to fly from Illinois to Louisville?

Use this chart to determine the cheapest time to fly round-trip from Illinois to Louisville. Price data was last updated on July 11, 2026.

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

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 10m. Fly via Southwest, United Airlines, or Delta to get the fastest option. The distance between Illinois and Louisville is about 271 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Illinois to Louisville one-way?

    $38 is the cheapest one-way deal found within the past few days, from Southwest. You may also be able to find cheap deals on United Airlines and American Airlines, with prices starting from $45 and $58, respectively.

  • 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: Envoy Air (91%), Japan Airlines (81%), Aer Lingus( 78%).

  • What are the cheapest flights from Illinois to Louisville?

    Looking for the cheapest flight from Illinois to Louisville? While on average our users pay $330, our data indicates the cheapest price to be $121. The most popular route (Chicago O'Hare Intl - Louisville Intl), is priced around $177.

  • 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, August is the cheapest month in which you can book a flight from Illinois to Louisville (average of $77). Flying from Illinois to Louisville in July is currently the most expensive (average of $257). 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
Corydon
Shepherdsville
Elizabethtown
Jeffersonville
Bardstown

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Alternative routes for Illinois to Louisville

See prices for flight routes from nearby airports that may be better suited for you.
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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 July 13, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$124Average$295FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$136Average$351FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$137Average$402FlexibilityNo cancel feeOn-time69%

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