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Illinois

$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 5/20. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — ORD
Apr 4 — Apr 111
Sat 4/4
Sat 4/11
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 March 5, 2026.

This Southwest deal was found by Cheapflights users on 3/3. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/111:50 am
SDF
-
MDW
Nonstop1h 15m
Southwest
Wed 4/812:50 pm
MDW
-
SDF
Nonstop1h 15m
Southwest
Deal found 3/3$97
This United Airlines deal was found by Cheapflights users on 3/4. 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 4/17:20 am
SDF
-
ORD
Nonstop1h 40m
United Airlines
Wed 4/15:45 pm
ORD
-
SDF
Nonstop1h 31m
United Airlines
Deal found 3/4$117
This Southwest deal was found by Cheapflights users on 3/4. 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 4/157:00 am
SDF
-
ORD
1 stop6h 50m
Southwest
Tue 4/212:40 pm
ORD
-
SDF
1 stop5h 25m
Southwest
Deal found 3/4$122
This Southwest deal was found by Cheapflights users on 3/4. 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 4/151:35 pm
SDF
-
MDW
1 stop7h 45m
Southwest
Tue 4/2110:15 am
MDW
-
SDF
2 stops9h 50m
Southwest
Deal found 3/4$122
This United Airlines deal was found by Cheapflights users on 3/3. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/65:00 am
SDF
-
ORD
Nonstop1h 40m
United Airlines
Wed 4/89:30 pm
ORD
-
SDF
Nonstop1h 29m
United Airlines
Deal found 3/3$127
This Southwest deal was found by Cheapflights users on 3/4. 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 3/3011:50 am
SDF
-
MDW
Nonstop1h 15m
Southwest
Wed 4/16:15 pm
MDW
-
SDF
Nonstop1h 15m
Southwest
Deal found 3/4$127
This United Airlines deal was found by Cheapflights users on 3/1. 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.
Sat 4/1810:07 am
SDF
-
ORD
Nonstop1h 40m
United Airlines
Mon 4/207:54 pm
ORD
-
SDF
Nonstop1h 36m
United Airlines
Deal found 3/1$144
This Southwest deal was found by Cheapflights users on 3/1. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/287:20 am
SDF
-
MDW
Nonstop1h 20m
Southwest
Mon 3/307:40 pm
MDW
-
SDF
Nonstop1h 15m
Southwest
Deal found 3/1$145
This United Airlines deal was found by Cheapflights users on 3/4. 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 3/301:55 pm
SDF
-
ORD
Nonstop1h 38m
United Airlines
Wed 4/16:45 am
ORD
-
SDF
Nonstop1h 25m
United Airlines
Deal found 3/4$147
This United Airlines deal was found by Cheapflights users on 3/2. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/235:45 pm
SDF
-
ORD
Nonstop1h 55m
United Airlines
Wed 3/257:40 pm
ORD
-
SDF
Nonstop1h 33m
United Airlines
Deal found 3/2$157
This Delta deal was found by Cheapflights users on 3/4. 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 4/16:00 am
SDF
-
ORD
1 stop4h 59m
Delta
Wed 4/89:50 am
ORD
-
SDF
2 stops7h 59m
Delta
Deal found 3/4$162
This Delta deal was found by Cheapflights users on 3/4. 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 4/157:56 am
SDF
-
ORD
1 stop5h 49m
Delta
Sat 4/1811:19 am
ORD
-
SDF
1 stop4h 30m
Delta
Deal found 3/4$167

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 March 5, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$97
(Southwest)

One-way from

$49
(United Airlines)

Popular in

January

Cheapest in

November

Average price

$277

Good round-trip deal

$348 or less

Good one-way deal

$190 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. 20% potential increase in price ($69 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 March 5, 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

LouisvilleChicago

SDF - MDW

SDFMDW

Louisville Intl

Wed 4/1

11:50 am-12:05 pm

Nonstop1h 15m

Chicago Midway

Wed 4/8

12:50 pm-3:05 pm

Nonstop1h 15m

$97

LouisvilleChicago

SDF - MDW

SDFMDW

Louisville Intl

Sat 3/28

7:20 am-7:40 am

Nonstop1h 20m

Chicago Midway

Mon 3/30

7:40 pm-9:55 pm

Nonstop1h 15m

$145

LouisvilleChicago

SDF - MDW

SDFMDW

Louisville Intl

Mon 3/23

8:05 pm-8:20 pm

Nonstop1h 15m

Chicago Midway

Mon 3/30

7:40 pm-9:55 pm

Nonstop1h 15m

$157

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Sat 4/18

6:40 am-3:30 pm

1 stop9h 50m

Chicago O'Hare Intl

Mon 4/20

2:40 pm-9:45 pm

1 stop6h 05m

$170

LouisvilleChicago

SDF - MDW

SDFMDW

Louisville Intl

Mon 3/23

8:05 pm-8:20 pm

Nonstop1h 15m

Chicago Midway

Wed 3/25

7:45 am-3:55 pm

2 stops7h 10m

$172

LouisvilleChicago

SDF - MDW

SDFMDW

Louisville Intl

Wed 4/8

4:40 pm-8:00 pm

1 stop4h 20m

Chicago Midway

Sat 4/11

7:50 am-10:05 am

Nonstop1h 15m

$210

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Thu 3/26

7:05 am-7:49 am

Nonstop1h 44m

Chicago O'Hare Intl

Mon 3/30

7:54 pm-10:30 pm

Nonstop1h 36m

$215

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Mon 4/6

5:00 am-5:40 am

Nonstop1h 40m

Chicago O'Hare Intl

Thu 4/9

6:45 am-9:10 am

Nonstop1h 25m

$217

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Tue 4/7

5:00 am-5:40 am

Nonstop1h 40m

Chicago O'Hare Intl

Thu 4/9

6:45 am-9:10 am

Nonstop1h 25m

$217

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Fri 4/3

5:00 am-5:40 am

Nonstop1h 40m

Chicago O'Hare Intl

Tue 4/7

9:30 pm-11:59 pm

Nonstop1h 29m

$226

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/3

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, September is the cheapest month in which you can book a flight from Louisville to Illinois (average of $77). Flying from Louisville to Illinois in July is currently the most expensive (average of $139). 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 March 5, 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 33% 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 February 21, 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.

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 March 5, 2026.
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
4,307 reviews

Entertainment

7.5

Food

7.0

Crew

8.6

Overall

8.0

Comfort

8.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

KOA - HNL

pretty smooth and fast service ever, that flight is very helpful each and everyone for price and also fright for free..
Southwest
8.0
Very good
4,307 reviews
Southwest
8.0
Very good
4,307 reviews

Entertainment

7.5

Food

7.0

Crew

8.6

Overall

8.0

Comfort

8.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

KOA - HNL

pretty smooth and fast service ever, that flight is very helpful each and everyone for price and also fright for free..
United Airlines
7.4
Good
9,389 reviews
Southwest
8.0
Very good
4,307 reviews

Entertainment

7.5

Food

7.0

Crew

8.6

Overall

8.0

Comfort

8.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

KOA - HNL

pretty smooth and fast service ever, that flight is very helpful each and everyone for price and also fright for free..
American Airlines
7.2
Good
11,381 reviews
Southwest
8.0
Very good
4,307 reviews

Entertainment

7.5

Food

7.0

Crew

8.6

Overall

8.0

Comfort

8.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

KOA - HNL

pretty smooth and fast service ever, that flight is very helpful each and everyone for price and also fright for free..

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 $97, Southwest can have you in Illinois from Louisville in 1h 15m. Louisville and Illinois are separated by a distance of 271 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 $52 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 (82%), Japan Airlines (79%) 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 $118. While the most popular route (Louisville Intl - Chicago O'Hare Intl) can be booked for $97 on average, our data indicates $992 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, September is the cheapest month in which you can book a flight from Louisville to Illinois (average of $77). Flying from Louisville to Illinois in July is currently the most expensive (average of $139). 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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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 March 5, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$97Average$248FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$97Average$270FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$97Average$251FlexibilityNo cancel feeOn-time63%

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