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$49+ Cheap flights from Louisville (SDF) to Illinois

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 10/22. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — ORD
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheap flight deals from Louisville to Illinois

Keep the following information in mind while searching for Louisville to Illinois flight deals. Data was last updated September 16, 2025.

Round-trip from

$107
(Southwest)

One-way from

$49
(American Airlines)

Popular in

March

Cheapest in

April

Average price

$275

Good round-trip deal

$238 or less

Good one-way deal

$178 or less
From Louisville Intl to Illinois
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One-way flight from Louisville Intl to Illinois
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High demand for flights, 3% potential price rise
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Cheapest flight prices on average. 1% potential price decrease ($3 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Louisville Intl to Illinois.
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Price to beat on a one-way flight from Louisville Intl to Illinois.
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Find flight deals from Louisville to Illinois

Cheapest flights from Louisville to Illinois
Explore the most affordable flight options available from Louisville to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2025.

This Southwest deal was found by Cheapflights users on 9/16. 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.
Tue 11/43:20 pmSDF - MDW
1 stop6h 45mSouthwest
Thu 11/67:15 pmMDW - SDF
Nonstop1h 15mSouthwest
Deal found 9/16$107
This Southwest deal was found by Cheapflights users on 9/14. 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 10/1411:55 amSDF - MDW
Nonstop1h 15mSouthwest
Tue 10/2112:30 pmMDW - SDF
1 stop8h 10mSouthwest
Deal found 9/14$113
This Southwest deal was found by Cheapflights users on 9/15. 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.
Sat 11/81:10 pmSDF - MDW
1 stop6h 55mSouthwest
Wed 11/128:25 amMDW - SDF
2 stops7h 45mSouthwest
Deal found 9/15$122
This American Airlines deal was found by Cheapflights users on 9/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/146:45 amSDF - ORD
Nonstop1h 33mAmerican Airlines
Fri 10/178:21 pmORD - SDF
Nonstop1h 35mAmerican Airlines
Deal found 9/15$134
This Southwest deal was found by Cheapflights users on 9/14. 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 10/208:15 pmSDF - MDW
Nonstop1h 15mSouthwest
Fri 10/249:25 pmMDW - SDF
Nonstop1h 15mSouthwest
Deal found 9/14$134
This United Airlines deal was found by Cheapflights users on 9/14. 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 11/49:00 amSDF - ORD
Nonstop1h 40mUnited Airlines
Thu 11/67:30 amORD - SDF
Nonstop1h 29mUnited Airlines
Deal found 9/14$152
This United Airlines deal was found by Cheapflights users on 9/16. 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.
Tue 10/77:20 pmSDF - ORD
Nonstop1h 49mUnited Airlines
Thu 10/92:42 pmORD - SDF
Nonstop1h 31mUnited Airlines
Deal found 9/16$155
This United Airlines deal was found by Cheapflights users on 9/16. 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.
Fri 10/107:20 pmSDF - ORD
Nonstop1h 49mUnited Airlines
Sat 10/112:42 pmORD - SDF
Nonstop1h 31mUnited Airlines
Deal found 9/16$156
This United Airlines deal was found by Cheapflights users on 9/16. 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.
Wed 11/127:00 amSDF - ORD
Nonstop1h 40mUnited Airlines
Mon 11/177:30 amORD - SDF
Nonstop1h 29mUnited Airlines
Deal found 9/16$157
This United Airlines deal was found by Cheapflights users on 9/16. 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 10/167:20 pmSDF - ORD
Nonstop1h 49mUnited Airlines
Mon 10/207:50 pmORD - SDF
Nonstop1h 40mUnited Airlines
Deal found 9/16$159
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Fri 10/177:20 pmSDF - ORD
Nonstop1h 49mUnited Airlines
Mon 10/207:50 pmORD - SDF
Nonstop1h 40mUnited Airlines
Deal found 9/15$161
This American Airlines deal was found by Cheapflights users on 9/14. 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.
Tue 10/146:45 amSDF - ORD
Nonstop1h 33mAmerican Airlines
Tue 10/218:28 pmORD - SDF
Nonstop1h 35mAmerican Airlines
Deal found 9/14$164

Cheapflights Fare Finder

 
Customize your flight search to find flights from Louisville to Illinois 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 September 16, 2025.
Use the filters below to find and compare flights from Louisville to Illinois that are best for you.

Fly from

Louisville

Fly to

Illinois

Route

Depart

Return

Price

LouisvilleChicago

SDF - MDW

SDFMDW

Louisville Intl

Thu 11/20

3:20 pm-9:05 pm

1 stop6h 45m

Chicago Midway

Sat 11/22

7:55 am-7:00 pm

2 stops10h 05m

$122

LouisvilleChicago

SDF - MDW

SDFMDW

Louisville Intl

Tue 10/14

3:50 pm-8:50 pm

1 stop6h 00m

Chicago Midway

Fri 10/17

5:20 pm-12:10 am

1 stop5h 50m

$154

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Thu 11/13

7:00 am-7:40 am

Nonstop1h 40m

Chicago O'Hare Intl

Mon 11/17

7:30 am-9:59 am

Nonstop1h 29m

$157

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Wed 11/12

7:00 am-7:40 am

Nonstop1h 40m

Chicago O'Hare Intl

Sat 11/15

10:50 am-1:17 pm

Nonstop1h 27m

$157

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Thu 10/16

7:20 pm-8:09 pm

Nonstop1h 49m

Chicago O'Hare Intl

Mon 10/20

7:50 pm-10:30 pm

Nonstop1h 40m

$159

LouisvilleChicago

SDF - MDW

SDFMDW

Louisville Intl

Tue 10/14

6:25 am-6:40 am

Nonstop1h 15m

Chicago Midway

Wed 10/15

10:10 am-12:25 pm

Nonstop1h 15m

$164

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Sat 11/8

7:55 am-12:40 pm

1 stop5h 45m

Chicago O'Hare Intl

Wed 11/12

4:21 pm-12:06 am

1 stop6h 45m

$177

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Tue 11/11

6:00 am-10:19 am

1 stop5h 19m

Chicago O'Hare Intl

Tue 11/11

2:30 pm-9:14 pm

1 stop5h 44m

$177

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Wed 10/22

8:17 am-12:16 pm

1 stop4h 59m

Chicago O'Hare Intl

Sat 10/25

7:10 am-2:20 pm

1 stop6h 10m

$177

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Sat 10/11

10:30 am-4:11 pm

1 stop6h 41m

Chicago O'Hare Intl

Tue 10/14

5:20 am-11:49 am

1 stop5h 29m

$177

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 55 results
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Best time to book a flight from Louisville to Illinois

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

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

Currently, August is the cheapest month in which you can book a flight from Louisville to Illinois (average of $245). Flying from Louisville to Illinois in March is currently the most expensive (average of $321). 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 IL?

Find hourly flight availability from Louisville to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 16, 2025.

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

Weekly flight availability from Louisville to Illinois

Explore weekly flight availability from Louisville to Illinois. 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 September 16, 2025.

The most flights from SDF to USIL are scheduled on a Monday (42 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (34 on average).

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated September 16, 2025.
See what other customers who have flown with Southwest, United Airlines, and American Airlines from Louisville to Illinois 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
4,242 reviews

Comfort

8.0

Boarding

8.1

Overall

8.0

Entertainment

7.5

Crew

8.6

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,242 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Boarding

8.1

Overall

8.0

Entertainment

7.5

Crew

8.6

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
United Airlines
7.4
Good
8,924 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Boarding

8.1

Overall

8.0

Entertainment

7.5

Crew

8.6

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Boarding

8.1

Overall

8.0

Entertainment

7.5

Crew

8.6

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Related info for your journey

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

    Most people fly from Louisville Intl (SDF) if they book a flight from Louisville to Illinois. Louisville Intl is conveniently located just 5.3 mi from Louisville’s city center.

  • How long is the flight from Louisville to Illinois?

    For as low as $152, Southwest can have you in Illinois from Louisville in 1h 40m. Louisville and Illinois are separated by a distance of 287 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    While some choose either Louisville Intl - Chicago Midway or Louisville Intl - Lambert-St Louis, Louisville Intl - Chicago O'Hare Intl is the most popular route from Louisville to Illinois.

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

    No one likes to see their flight delayed. When booking a flight from Louisville to Illinois consider choosing Qatar Airways (92%), Republic Airways (91%) or Royal Jordanian (91%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Louisville to Illinois?

    Looking at all options, your cheapest flight can be booked for $78. While the most popular route (Louisville Intl - Chicago O'Hare Intl) can be booked for $97 on average, our data indicates $957 when flying from Louisville to Illinois.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Louisville to Illinois (average of $245). Flying from Louisville to Illinois in March is currently the most expensive (average of $321). 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

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Alternative routes for Louisville to Illinois

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Top 3 airlines flying from Louisville to Illinois

Discover the top 3 airlines that operate flights from Louisville to Illinois. 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 September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$97Average$261FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$97Average$260FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$123Average$298FlexibilityNo cancel feeOn-time69%

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