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$49+ 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 9/4. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SDF
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
1 adult, Economy
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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 July 3, 2025.

Round-trip from

$97
(United Airlines)

One-way from

$49
(United Airlines)

Popular in

February

Cheapest in

August

Average price

$292

Good round-trip deal

$174 or less

Good one-way deal

$118 or less
From Illinois to Louisville Intl
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One-way flight from Illinois to Louisville Intl
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Highest demand for flights based on searches. 16% potential increase in price ($58 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($18 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Price to beat on a round-trip flight from Illinois to Louisville Intl.
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Price to beat on a one-way flight from Illinois to Louisville Intl.
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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 July 3, 2025.

This United Airlines deal was found by Cheapflights users on 7/1. 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.
Thu 8/72:20 pmORD - SDF
Nonstop1h 31mUnited Airlines
Mon 8/112:10 pmSDF - ORD
Nonstop1h 40mUnited Airlines
Deal found 7/1$97
This Southwest deal was found by Cheapflights users on 7/2. 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.
Thu 8/710:00 amMDW - SDF
Nonstop1h 20mSouthwest
Mon 8/116:25 amSDF - MDW
Nonstop1h 15mSouthwest
Deal found 7/2$97
This American Airlines deal was found by Cheapflights users on 7/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/148:20 pmORD - SDF
Nonstop1h 42mAmerican Airlines
Thu 8/216:44 amSDF - ORD
Nonstop1h 46mAmerican Airlines
Deal found 7/1$98
This Southwest deal was found by Cheapflights users on 7/2. 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.
Thu 8/77:30 amORD - SDF
1 stop6h 20mSouthwest
Mon 8/1111:50 amSDF - ORD
1 stop5h 35mSouthwest
Deal found 7/2$117
This Delta deal was found by Cheapflights users on 7/3. 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 9/207:10 amORD - SDF
1 stop6h 43mDelta
Tue 10/76:26 pmSDF - ORD
1 stop4h 20mDelta
Deal found 7/3$177
This Delta deal was found by Cheapflights users on 7/1. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/66:00 amMDW - SDF
1 stop4h 45mDelta
Wed 8/132:56 pmSDF - MDW
1 stop4h 41mDelta
Deal found 7/1$177
This FlightHub deal was found by Cheapflights users on 7/2. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/3110:00 amORD - SDF
1 stop6h 58mSpirit Airlines
Sun 8/36:53 pmSDF - ORD
1 stop21h 38mSpirit Airlines
Deal found 7/2$218
This American Airlines deal was found by Cheapflights users on 7/2. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/165:22 amSTL - SDF
1 stop5h 20mAmerican Airlines
Sat 8/2312:12 pmSDF - STL
1 stop4h 30mAmerican Airlines
Deal found 7/2$219
This Delta deal was found by Cheapflights users on 6/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/185:26 pmMLI - SDF
1 stop4h 20mDelta
Sat 7/1910:34 amSDF - MLI
1 stop7h 12mDelta
Deal found 6/30$239
This Southwest deal was found by Cheapflights users on 7/2. 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 8/2910:30 amSTL - SDF
2 stops7h 05mSouthwest
Mon 9/16:25 amSDF - STL
1 stop3h 15mSouthwest
Deal found 7/2$247
This United Airlines deal was found by Cheapflights users on 7/1. 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.
Fri 8/295:30 pmSTL - SDF
1 stop3h 54mUnited Airlines
Sun 8/319:05 amSDF - STL
1 stop4h 20mUnited Airlines
Deal found 7/1$262
This FlightHub deal was found by Cheapflights users on 7/1. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/2410:47 amSTL - SDF
1 stop26h 08mSpirit Airlines
Wed 7/308:13 pmSDF - STL
1 stop21h 18mSpirit Airlines
Deal found 7/1$278

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 3, 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

ORD - SDF

ORDSDF

Chicago O'Hare Intl

Thu 8/7

2:20 pm-4:51 pm

Nonstop1h 31m

Louisville Intl

Mon 8/11

2:10 pm-2:50 pm

Nonstop1h 40m

$97

ChicagoLouisville

MDW - SDF

MDWSDF

Chicago Midway

Thu 8/7

8:35 pm-10:50 pm

Nonstop1h 15m

Louisville Intl

Mon 8/11

6:25 am-6:40 am

Nonstop1h 15m

$97

ChicagoLouisville

ORD - SDF

ORDSDF

Chicago O'Hare Intl

Thu 8/14

8:20 pm-11:02 pm

Nonstop1h 42m

Louisville Intl

Thu 8/21

6:44 am-7:30 am

Nonstop1h 46m

$98

ChicagoLouisville

ORD - SDF

ORDSDF

Chicago O'Hare Intl

Thu 8/7

7:30 am-2:50 pm

1 stop6h 20m

Louisville Intl

Mon 8/11

11:50 am-4:25 pm

1 stop5h 35m

$117

ChicagoLouisville

ORD - SDF

ORDSDF

Chicago O'Hare Intl

Sat 9/20

7:10 am-2:53 pm

1 stop6h 43m

Louisville Intl

Tue 10/7

6:26 pm-9:46 pm

1 stop4h 20m

$177

ChicagoLouisville

MDW - SDF

MDWSDF

Chicago Midway

Wed 8/6

6:00 am-11:45 am

1 stop4h 45m

Louisville Intl

Wed 8/13

2:56 pm-6:37 pm

1 stop4h 41m

$177

ChicagoLouisville

ORD - SDF

ORDSDF

Chicago O'Hare Intl

Thu 7/31

10:00 am-5:58 pm

1 stop6h 58m

Louisville Intl

Sun 8/3

6:53 pm-3:31 pm

1 stop21h 38m

$218

St. LouisLouisville

STL - SDF

STLSDF

Lambert-St Louis

Sat 8/16

5:22 am-11:42 am

1 stop5h 20m

Louisville Intl

Sat 8/23

12:12 pm-3:42 pm

1 stop4h 30m

$219

MolineLouisville

MLI - SDF

MLISDF

Moline Quad-City

Fri 7/18

5:26 pm-10:46 pm

1 stop4h 20m

Louisville Intl

Sat 7/19

10:34 am-4:46 pm

1 stop7h 12m

$239

St. LouisLouisville

STL - SDF

STLSDF

Lambert-St Louis

Fri 8/29

10:30 am-6:35 pm

2 stops7h 05m

Louisville Intl

Mon 9/1

6:25 am-8:40 am

1 stop3h 15m

$247

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

Showing 1-10 of 33 results
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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, 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 July 3, 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 July 3, 2025.

The most flights from USIL to SDF are scheduled on a Thursday (37 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (11 on average).

Reviews of airlines servicing Louisville

Get insights into the airlines that provide service to Louisville. 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 Louisville. Reviews last updated July 3, 2025.
See what other customers who have flown with Southwest, Delta, and United Airlines from Illinois to Louisville have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,266 reviews

Overall

8.0

Food

7.0

Comfort

8.0

Boarding

8.2

Entertainment

7.6

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Southwest
8.0
Very good
4,266 reviews
Southwest
8.0
Very good
4,266 reviews

Overall

8.0

Food

7.0

Comfort

8.0

Boarding

8.2

Entertainment

7.6

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Delta
8.0
Very good
7,982 reviews
Southwest
8.0
Very good
4,266 reviews

Overall

8.0

Food

7.0

Comfort

8.0

Boarding

8.2

Entertainment

7.6

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
United Airlines
7.4
Good
8,861 reviews
Southwest
8.0
Very good
4,266 reviews

Overall

8.0

Food

7.0

Comfort

8.0

Boarding

8.2

Entertainment

7.6

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Allegiant Air
7.3
Good
708 reviews
Southwest
8.0
Very good
4,266 reviews

Overall

8.0

Food

7.0

Comfort

8.0

Boarding

8.2

Entertainment

7.6

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,266 reviews

Overall

8.0

Food

7.0

Comfort

8.0

Boarding

8.2

Entertainment

7.6

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

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.

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

    $49 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on Southwest and American Airlines, with prices starting from $49 and $50, 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: GoJet (90%), Copa Airlines (89%), Japan Airlines( 89%).

  • What are the cheapest flights from Illinois to Louisville?

    Looking for the cheapest flight from Illinois to Louisville? While on average our users pay $318, our data indicates the cheapest price to be $78. The most popular route (Chicago O'Hare Intl - Louisville Intl), is priced around $97.

  • 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 Illinois?

Book flights to Illinois if you plan to visit one of these locations
Shepherdsville
Jeffersonville
Elizabethtown
Corydon
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 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$117Average$293FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$137Average$333FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$157Average$545FlexibilityNo cancel feeOn-time63%

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