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Illinois

$88+ 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 5/15. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — ORD
May 18 — May 251
Mon 5/18
Mon 5/25
1 adult, Economy
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Cheap 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 April 18, 2026.

This Kiwi.com deal was found by Cheapflights users on 4/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/1510:33 am
SDF
-
ORD
1 stop14h 26m
Multiple Airlines
Tue 5/195:05 am
ORD
-
SDF
1 stop29h 29m
Multiple Airlines
Deal found 4/15$190
This Kiwi.com deal was found by Cheapflights users on 4/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/810:33 am
SDF
-
ORD
1 stop14h 26m
Multiple Airlines
Tue 5/124:05 pm
ORD
-
SDF
2 stops39h 58m
Multiple Airlines
Deal found 4/15$199
This Kiwi.com deal was found by Cheapflights users on 4/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/17:48 pm
SDF
-
ORD
1 stop14h 48m
Multiple Airlines
Sat 5/27:15 pm
ORD
-
SDF
1 stop20h 49m
Multiple Airlines
Deal found 4/14$222
This Kiwi.com deal was found by Cheapflights users on 4/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/59:10 pm
SDF
-
ORD
1 stop16h 27m
Multiple Airlines
Tue 6/97:52 am
ORD
-
SDF
1 stop26h 38m
Multiple Airlines
Deal found 4/13$228
This Kiwi.com deal was found by Cheapflights users on 4/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/2210:33 am
SDF
-
ORD
1 stop27h 04m
Multiple Airlines
Sun 5/247:33 pm
ORD
-
SDF
1 stop12h 55m
Multiple Airlines
Deal found 4/16$232
This Kiwi.com deal was found by Cheapflights users on 4/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/910:33 am
SDF
-
ORD
1 stop13h 42m
Multiple Airlines
Sun 5/103:44 pm
ORD
-
SDF
1 stop16h 44m
Multiple Airlines
Deal found 4/14$238
This Kiwi.com deal was found by Cheapflights users on 4/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/1510:33 am
SDF
-
ORD
1 stop14h 26m
Multiple Airlines
Sun 5/1710:22 am
ORD
-
SDF
2 stops22h 06m
Multiple Airlines
Deal found 4/16$239
This Kiwi.com deal was found by Cheapflights users on 4/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/59:10 pm
SDF
-
ORD
1 stop16h 27m
Multiple Airlines
Wed 6/107:52 am
ORD
-
SDF
1 stop24h 36m
Multiple Airlines
Deal found 4/17$242
This Kiwi.com deal was found by Cheapflights users on 4/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2110:33 am
SDF
-
ORD
1 stop13h 42m
Multiple Airlines
Tue 5/268:05 am
ORD
-
SDF
1 stop26h 29m
Multiple Airlines
Deal found 4/16$243
This Kiwi.com deal was found by Cheapflights users on 4/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/2012:24 pm
SDF
-
ORD
1 stop25h 13m
Multiple Airlines
Sat 5/235:11 pm
ORD
-
SDF
1 stop14h 40m
Multiple Airlines
Deal found 4/15$245
This Southwest deal was found by Cheapflights users on 4/15. 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.
Wed 5/133:30 pm
SDF
-
MDW
Nonstop1h 15m
Southwest
Wed 5/2012:50 pm
MDW
-
SDF
Nonstop1h 15m
Southwest
Deal found 4/15$257
This Southwest deal was found by Cheapflights users on 4/16. 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.
Sat 5/168:40 am
SDF
-
MDW
Nonstop1h 20m
Southwest
Tue 5/197:40 am
MDW
-
SDF
Nonstop1h 10m
Southwest
Deal found 4/16$264

Find flight deals from Louisville to Illinois

Keep the following information in mind while searching for Louisville to Illinois flight deals. Data was last updated April 18, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$190
(Kiwi.com)

One-way from

$88
(Kiwi.com)

Popular in

January

Cheapest in

November

Average price

$332

Good round-trip deal

$384 or less

Good one-way deal

$199 or less
Provider with most accurate pricing for Louisville Intl-Chicago (CHI) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Louisville Intl-Chicago (CHI) flights.
Search Deals
From Louisville Intl to Illinois
Search Deals
One-way flight from Louisville Intl to Illinois
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($53 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals
Price to beat on a round-trip flight from Louisville Intl to Illinois.
Search Deals
Price to beat on a one-way flight from Louisville Intl to Illinois.
Search Deals

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 April 18, 2026.
Use the filters below to find and compare flights from Louisville to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Tue 5/12

5:40 am-6:20 am

Nonstop1h 40m

Chicago O'Hare Intl

Wed 5/13

7:53 pm-10:30 pm

Nonstop1h 37m

$257

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Wed 5/13

10:06 am-10:45 am

Nonstop1h 39m

Chicago O'Hare Intl

Wed 5/20

12:30 pm-2:55 pm

Nonstop1h 25m

$257

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Tue 5/12

3:45 pm-9:05 pm

1 stop6h 20m

Lambert-St Louis

Tue 5/19

2:30 pm-9:05 pm

1 stop5h 35m

$275

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Tue 6/2

7:50 am-10:29 am

1 stop3h 39m

Chicago O'Hare Intl

Tue 6/9

5:57 pm-11:54 pm

1 stop4h 57m

$277
Quickest round-trip

LouisvilleChicago

SDF - MDW

SDFMDW

Louisville Intl

Fri 5/8

8:10 pm-8:25 pm

Nonstop1h 15m

Chicago Midway

Tue 5/12

6:20 pm-8:35 pm

Nonstop1h 15m

$277

LouisvilleChicago

SDF - MDW

SDFMDW

Louisville Intl

Tue 5/19

5:47 pm-9:09 pm

1 stop4h 22m

Chicago Midway

Tue 5/26

9:22 am-1:51 pm

1 stop3h 29m

$277

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Tue 5/12

12:10 pm-8:00 pm

2 stops8h 50m

Lambert-St Louis

Wed 5/13

5:35 am-9:50 am

1 stop3h 15m

$280

LouisvilleChicago

SDF - MDW

SDFMDW

Louisville Intl

Sat 5/9

8:40 am-9:00 am

Nonstop1h 20m

Chicago Midway

Mon 5/11

5:30 am-2:00 pm

1 stop7h 30m

$289

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Mon 5/11

7:59 pm-11:59 pm

1 stop5h 00m

Chicago O'Hare Intl

Wed 5/13

7:00 am-1:51 pm

1 stop5h 51m

$292

LouisvilleChicago

SDF - MDW

SDFMDW

Louisville Intl

Fri 5/15

2:40 pm-2:55 pm

Nonstop1h 15m

Chicago Midway

Tue 5/19

10:15 am-9:05 pm

2 stops9h 50m

$292

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/14

Showing 1-10 of 60 resultsSorted by cheapest first
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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, January is the cheapest month in which you can book a flight from Louisville to Illinois (average of $67). Flying from Louisville to Illinois in February is currently the most expensive (average of $177). 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 April 18, 2026.

When flying from Louisville to Illinois, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 32% versus a flight at noon.

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

Use this chart to determine the cheapest time to fly round-trip from Louisville to Illinois. Price data was last updated on April 18, 2026.

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

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 April 18, 2026.

The most flights from SDF to USIL are scheduled on a Sunday (41 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (31 on average).

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

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 April 18, 2026.
See what other customers who have flown with Southwest,United Airlines, andAmerican 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
4,330 reviews

Overall

8.0

Crew

8.6

Entertainment

7.5

Boarding

8.1

Food

7.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
8.0
Very good
4,330 reviews
Southwest
8.0
Very good
4,330 reviews

Overall

8.0

Crew

8.6

Entertainment

7.5

Boarding

8.1

Food

7.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
United Airlines
7.4
Good
9,605 reviews
Southwest
8.0
Very good
4,330 reviews

Overall

8.0

Crew

8.6

Entertainment

7.5

Boarding

8.1

Food

7.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
American Airlines
7.1
Good
11,604 reviews
Southwest
8.0
Very good
4,330 reviews

Overall

8.0

Crew

8.6

Entertainment

7.5

Boarding

8.1

Food

7.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

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 $257, United Airlines 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 cheapest airlines to fly from Louisville to Illinois one-way?

    For one-way options, check prices for Southwest. According to our data, you can fly for as low as $38. Users have also found prices from $48 and $53 on United Airlines and American Airlines, respectively.

  • 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 Copa Airlines (80%), Qatar Airways (80%) or Republic Airways (78%) 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 $143. While the most popular route (Louisville Intl - Chicago O'Hare Intl) can be booked for $232 on average, our data indicates $1,075 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, January is the cheapest month in which you can book a flight from Louisville to Illinois (average of $67). Flying from Louisville to Illinois in February is currently the most expensive (average of $177). 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.

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Alternative routes for Louisville to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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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 April 18, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$77Average$225FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$97Average$253FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$114Average$273FlexibilityNo cancel feeOn-time69%

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