HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Illinois

$39+ 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 10/7. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — ORD
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Louisville to Illinois with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 August 14, 2025.

Round-trip from

$97
(Southwest)

One-way from

$39
(United Airlines)

Popular in

March

Cheapest in

April

Average price

$266

Good round-trip deal

$179 or less

Good one-way deal

$141 or less
From Louisville Intl to Illinois
Search Deals
One-way flight from Louisville Intl to Illinois
Search Deals
High demand for flights, 3% potential price rise
Search Deals
Cheapest flight prices on average. 0% potential price decrease ($3 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2025
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

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 August 14, 2025.

This Southwest deal was found by Cheapflights users on 8/12. 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 9/93:20 pmSDF - ORD
1 stop7h 10mSouthwest
Tue 9/161:50 pmORD - SDF
1 stop5h 05mSouthwest
Deal found 8/12$97
This Southwest deal was found by Cheapflights users on 8/14. 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.
Wed 9/105:30 amSDF - ORD
1 stop7h 20mSouthwest
Sat 9/131:30 pmORD - SDF
1 stop7h 55mSouthwest
Deal found 8/14$102
This Southwest deal was found by Cheapflights users on 8/13. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/411:50 amSDF - MDW
2 stops10h 45mSouthwest
Mon 9/87:15 amMDW - SDF
1 stop4h 15mSouthwest
Deal found 8/13$102
This Southwest deal was found by Cheapflights users on 8/13. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/85:30 amSDF - ORD
1 stop8h 15mSouthwest
Thu 9/111:50 pmORD - SDF
1 stop8h 40mSouthwest
Deal found 8/13$108
This United Airlines deal was found by Cheapflights users on 8/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/67:20 amSDF - ORD
Nonstop1h 38mUnited Airlines
Sun 9/77:26 amORD - SDF
Nonstop1h 36mUnited Airlines
Deal found 8/13$114
This Southwest deal was found by Cheapflights users on 8/13. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/77:10 pmSDF - MDW
Nonstop1h 20mSouthwest
Tue 9/910:05 amMDW - SDF
Nonstop1h 20mSouthwest
Deal found 8/13$114
This American Airlines deal was found by Cheapflights users on 8/14. 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.
Sat 9/136:12 pmSDF - ORD
Nonstop1h 40mAmerican Airlines
Sun 9/147:05 amORD - SDF
Nonstop1h 19mAmerican Airlines
Deal found 8/14$121
This Southwest deal was found by Cheapflights users on 8/14. 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.
Fri 9/267:10 pmSDF - MDW
Nonstop1h 20mSouthwest
Mon 9/297:15 amMDW - SDF
1 stop4h 15mSouthwest
Deal found 8/14$124
This United Airlines deal was found by Cheapflights users on 8/12. 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.
Sun 8/315:52 pmSDF - ORD
Nonstop1h 47mUnited Airlines
Wed 9/32:45 pmORD - SDF
Nonstop1h 31mUnited Airlines
Deal found 8/12$128
This Southwest deal was found by Cheapflights users on 8/13. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/317:10 pmSDF - MDW
Nonstop1h 20mSouthwest
Wed 9/310:05 amMDW - SDF
Nonstop1h 20mSouthwest
Deal found 8/13$128
This Southwest deal was found by Cheapflights users on 8/13. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/77:10 pmSDF - MDW
Nonstop1h 20mSouthwest
Mon 9/85:45 amMDW - SDF
1 stop9h 40mSouthwest
Deal found 8/13$130
This Southwest deal was found by Cheapflights users on 8/13. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/75:45 amSDF - ORD
1 stop7h 05mSouthwest
Tue 9/97:30 amORD - SDF
1 stop6h 05mSouthwest
Deal found 8/13$134

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 August 14, 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

Tue 9/9

3:20 pm-9:30 pm

1 stop7h 10m

Chicago O'Hare Intl

Tue 9/16

1:50 pm-7:55 pm

1 stop5h 05m

$97

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Tue 9/30

3:20 pm-9:30 pm

1 stop7h 10m

Chicago O'Hare Intl

Wed 10/1

7:30 am-2:35 pm

1 stop6h 05m

$97

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Wed 9/24

5:30 am-11:50 am

1 stop7h 20m

Chicago O'Hare Intl

Thu 9/25

1:50 pm-11:30 pm

1 stop8h 40m

$102

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Wed 9/10

5:30 am-11:50 am

1 stop7h 20m

Chicago O'Hare Intl

Sat 9/13

1:30 pm-10:25 pm

1 stop7h 55m

$102

LouisvilleChicago

SDF - MDW

SDFMDW

Louisville Intl

Wed 9/24

3:20 pm-9:30 pm

1 stop7h 10m

Chicago Midway

Thu 9/25

11:10 am-6:35 pm

2 stops6h 25m

$102

LouisvilleChicago

SDF - MDW

SDFMDW

Louisville Intl

Thu 9/4

11:50 am-9:35 pm

2 stops10h 45m

Chicago Midway

Mon 9/8

7:15 am-12:30 pm

1 stop4h 15m

$102

LouisvilleChicago

SDF - MDW

SDFMDW

Louisville Intl

Mon 9/8

11:40 am-6:05 pm

1 stop7h 25m

Chicago Midway

Thu 9/11

11:10 am-6:35 pm

2 stops6h 25m

$102

LouisvilleChicago

SDF - MDW

SDFMDW

Louisville Intl

Wed 9/10

5:30 am-12:10 pm

2 stops7h 40m

Chicago Midway

Sat 9/13

7:00 am-12:45 pm

1 stop4h 45m

$102

LouisvilleChicago

SDF - MDW

SDFMDW

Louisville Intl

Wed 10/22

5:30 am-2:25 pm

2 stops9h 55m

Chicago Midway

Mon 10/27

2:15 pm-7:25 pm

1 stop4h 10m

$102

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Mon 9/8

5:30 am-12:45 pm

1 stop8h 15m

Chicago O'Hare Intl

Thu 9/11

1:50 pm-11:30 pm

1 stop8h 40m

$108

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/12

Showing 1-10 of 52 results
1
2
3
...
6

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 August 14, 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 August 14, 2025.

The most flights from SDF to USIL are scheduled on a Thursday (45 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (12 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 August 14, 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
4,244 reviews

Overall

8.0

Entertainment

7.5

Boarding

8.1

Crew

8.6

Comfort

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,244 reviews
Southwest
8.0
Very good
4,244 reviews

Overall

8.0

Entertainment

7.5

Boarding

8.1

Crew

8.6

Comfort

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
United Airlines
7.4
Good
8,916 reviews
Southwest
8.0
Very good
4,244 reviews

Overall

8.0

Entertainment

7.5

Boarding

8.1

Crew

8.6

Comfort

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,244 reviews

Overall

8.0

Entertainment

7.5

Boarding

8.1

Crew

8.6

Comfort

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

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 $39. Users have also found prices from $39 and $46 on Southwest 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 Japan Airlines (87%), Republic Airways (84%) or Copa Airlines (83%) 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 $89. While the most popular route (Louisville Intl - Chicago O'Hare Intl) can be booked for $77 on average our data indicates $946 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Louisville to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
Cincinnati to Orlando flights
Cincinnati to John F Kennedy Intl flights
Cincinnati to Las Vegas flights
Cincinnati to LaGuardia flights
Nashville to LaGuardia flights
Cincinnati to Denver flights
Cincinnati to Dallas/Fort Worth flights
Nashville to Las Vegas flights
Cincinnati to Sky Harbor Intl flights
Cincinnati to Boston flights
Cincinnati to Fort Lauderdale flights
Cincinnati to Miami flights
Cincinnati to Tampa flights
Nashville to John F Kennedy Intl flights
Nashville to O'Hare Intl flights
Nashville to Newark flights
Cincinnati to Newark flights
Nashville to Seattle flights
Nashville to Denver flights
Nashville to Boston flights
Louisville to LaGuardia flights
Cincinnati to Seattle flights
Nashville to Dallas/Fort Worth flights
Nashville to Fort Lauderdale flights
Cincinnati to Hobby flights
Louisville to Newark flights
Cincinnati to Fort Myers flights
Nashville to Orlando flights
Cincinnati to Los Angeles flights
Nashville to Miami flights
Nashville to Hobby flights
Louisville to John F Kennedy Intl flights
Louisville to Orlando flights
Cincinnati to Minneapolis flights
Cincinnati to Atlanta flights
Louisville to Miami flights
Cincinnati to Orlando Sanford Intl flights
Louisville to Boston flights
Cincinnati to O'Hare Intl flights
Cincinnati to George Bush Intcntl flights
Nashville to George Bush Intcntl flights
Louisville to Las Vegas flights
Nashville to Los Angeles flights
Nashville to Philadelphia flights
Nashville to Salt Lake City flights
Nashville to San Francisco flights
Cincinnati to Philadelphia flights
Louisville to Dallas/Fort Worth flights
Knoxville to O'Hare Intl flights
Lexington to Boston flights

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 August 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$97Average$276FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$97Average$264FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$133Average$357FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.