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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 8/25. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — ORD
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
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 July 3, 2025.

Round-trip from

$97
(United Airlines)

One-way from

$49
(United Airlines)

Popular in

March

Cheapest in

April

Average price

$255

Good round-trip deal

$287 or less

Good one-way deal

$159 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, 1% 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 July 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 July 3, 2025.

This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/46:08 pmSDF - ORD
Nonstop1h 42mUnited Airlines
Tue 8/510:55 amORD - SDF
Nonstop1h 29mUnited Airlines
Deal found 7/3$97
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/71:15 pmSDF - MDW
Nonstop1h 15mSouthwest
Mon 8/118:35 pmMDW - SDF
Nonstop1h 15mSouthwest
Deal found 7/1$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 8/76:08 pmSDF - ORD
Nonstop1h 40mAmerican Airlines
Mon 8/116:49 amORD - SDF
Nonstop1h 24mAmerican Airlines
Deal found 7/1$98
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/145:30 amSDF - ORD
1 stop7h 20mSouthwest
Wed 10/151:50 pmORD - SDF
1 stop6h 50mSouthwest
Deal found 7/1$117
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/77:50 amSDF - ORD
1 stop3h 26mDelta
Mon 8/112:00 pmORD - SDF
1 stop6h 15mDelta
Deal found 7/2$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.
Tue 8/512:50 pmSDF - MDW
1 stop4h 20mDelta
Wed 8/1312:43 pmMDW - SDF
1 stop4h 57mDelta
Deal found 7/1$177
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 12/67:12 pmSDF - STL
1 stop3h 35mAmerican Airlines
Wed 12/105:58 amSTL - SDF
1 stop10h 14mAmerican Airlines
Deal found 7/2$201
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/107:45 amSDF - ORD
1 stop9h 27mSpirit Airlines
Fri 9/126:30 amORD - SDF
1 stop16h 05mSpirit Airlines
Deal found 7/3$212
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/210:54 amSDF - STL
2 stops23h 58mMultiple Airlines
Sat 8/910:45 amSTL - SDF
1 stop9h 03mMultiple Airlines
Deal found 7/3$215
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/910:57 amSDF - ORD
1 stop7h 20mMultiple Airlines
Sun 8/1010:00 amORD - SDF
1 stop6h 58mMultiple Airlines
Deal found 7/2$229
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 8/28:05 amSDF - STL
1 stop5h 13mDelta
Sat 8/910:05 amSTL - SDF
1 stop6h 02mDelta
Deal found 7/3$235
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.
Thu 7/176:34 amSDF - MLI
1 stop5h 21mAmerican Airlines
Mon 7/216:37 pmMLI - SDF
1 stop3h 33mAmerican Airlines
Deal found 7/2$239

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 July 3, 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 - ORD

SDFORD

Louisville Intl

Mon 8/4

6:08 pm-6:50 pm

Nonstop1h 42m

Chicago O'Hare Intl

Tue 8/5

10:55 am-1:24 pm

Nonstop1h 29m

$97

LouisvilleChicago

SDF - MDW

SDFMDW

Louisville Intl

Thu 8/7

7:10 pm-7:30 pm

Nonstop1h 20m

Chicago Midway

Mon 8/11

10:00 am-12:20 pm

Nonstop1h 20m

$97

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Thu 8/7

6:08 pm-6:48 pm

Nonstop1h 40m

Chicago O'Hare Intl

Mon 8/11

6:49 am-9:13 am

Nonstop1h 24m

$98

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Thu 9/4

11:50 am-4:25 pm

1 stop5h 35m

Chicago O'Hare Intl

Thu 9/11

1:50 pm-11:30 pm

1 stop8h 40m

$122

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Thu 8/7

7:50 am-10:16 am

1 stop3h 26m

Chicago O'Hare Intl

Mon 8/11

2:00 pm-9:15 pm

1 stop6h 15m

$177

LouisvilleChicago

SDF - MDW

SDFMDW

Louisville Intl

Tue 8/5

12:50 pm-4:10 pm

1 stop4h 20m

Chicago Midway

Wed 8/13

12:43 pm-6:40 pm

1 stop4h 57m

$177

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Wed 9/10

7:45 am-4:12 pm

1 stop9h 27m

Chicago O'Hare Intl

Fri 9/12

6:30 am-11:35 pm

1 stop16h 05m

$212

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Sat 8/2

10:54 am-9:52 am

2 stops23h 58m

Lambert-St Louis

Sat 8/9

10:45 am-8:48 pm

1 stop9h 03m

$215

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Sat 8/9

10:57 am-5:17 pm

1 stop7h 20m

Chicago O'Hare Intl

Sun 8/10

10:00 am-5:58 pm

1 stop6h 58m

$229

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Sat 8/2

8:05 am-12:18 pm

1 stop5h 13m

Lambert-St Louis

Sat 8/9

10:05 am-5:07 pm

1 stop6h 02m

$235

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

Showing 1-10 of 32 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 July 3, 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 July 3, 2025.

The most flights from SDF to USIL are scheduled on a Thursday (42 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (7 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 July 3, 2025.
See what other customers who have flown with Southwest, Delta, and United 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
4,270 reviews

Crew

8.6

Food

7.0

Entertainment

7.6

Comfort

8.0

Boarding

8.2

Overall

8.0

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
4,270 reviews
Southwest
8.0
Very good
4,270 reviews

Crew

8.6

Food

7.0

Entertainment

7.6

Comfort

8.0

Boarding

8.2

Overall

8.0

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
7,970 reviews
Southwest
8.0
Very good
4,270 reviews

Crew

8.6

Food

7.0

Entertainment

7.6

Comfort

8.0

Boarding

8.2

Overall

8.0

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
8,845 reviews
Southwest
8.0
Very good
4,270 reviews

Crew

8.6

Food

7.0

Entertainment

7.6

Comfort

8.0

Boarding

8.2

Overall

8.0

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
4,270 reviews

Crew

8.6

Food

7.0

Entertainment

7.6

Comfort

8.0

Boarding

8.2

Overall

8.0

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
7.2
Good
709 reviews
Southwest
8.0
Very good
4,270 reviews

Crew

8.6

Food

7.0

Entertainment

7.6

Comfort

8.0

Boarding

8.2

Overall

8.0

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 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.

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

    For one-way options, check prices for United Airlines. According to our data, you can fly for as low as $49. Users have also found prices from $49 and $87 on Southwest and Allegiant Air, 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 Japan Airlines (97%), Copa Airlines (92%) or ANA (84%) 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 $2,526 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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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 July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$102Average$280FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$110Average$292FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$157Average$275FlexibilityNo cancel feeOn-time63%

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