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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 8/7. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — ORD
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$97
(American Airlines)

One-way from

$49
(Southwest)

Popular in

March

Cheapest in

April

Average price

$275

Good round-trip deal

$318 or less

Good one-way deal

$174 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 June 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 June 12, 2025.

This American Airlines deal was found by Cheapflights users on 6/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/46:50 pmSDF - ORD
Nonstop1h 35mAmerican Airlines
Wed 8/273:13 pmORD - SDF
Nonstop1h 25mAmerican Airlines
Deal found 6/12$97
This Southwest deal was found by Cheapflights users on 6/10. 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 8/43:55 pmSDF - MDW
Nonstop1h 15mSouthwest
Wed 8/2710:05 amMDW - SDF
Nonstop1h 20mSouthwest
Deal found 6/10$97
This United Airlines deal was found by Cheapflights users on 6/11. 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 9/2910:55 amSDF - ORD
Nonstop1h 38mUnited Airlines
Mon 9/297:50 pmORD - SDF
Nonstop1h 40mUnited Airlines
Deal found 6/11$116
This Southwest deal was found by Cheapflights users on 6/11. 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 9/25:30 amSDF - ORD
1 stop7h 20mSouthwest
Tue 9/97:30 amORD - SDF
1 stop6h 05mSouthwest
Deal found 6/11$117
This Mytrip deal was found by Cheapflights users on 6/10. 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.
Mon 7/71:57 pmSDF - ORD
1 stop20h 41mSpirit Airlines
Thu 7/1011:21 amORD - SDF
1 stop20h 43mSpirit Airlines
Deal found 6/10$172
This Delta deal was found by Cheapflights users on 6/9. 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 8/3012:30 pmSDF - ORD
1 stop7h 49mDelta
Sat 9/65:30 pmORD - SDF
1 stop4h 30mDelta
Deal found 6/9$177
This Delta deal was found by Cheapflights users on 6/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1110:15 amSDF - MDW
1 stop3h 17mDelta
Tue 11/115:25 pmMDW - SDF
1 stop5h 31mDelta
Deal found 6/12$177
This American Airlines deal was found by Cheapflights users on 6/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/76:44 amSDF - STL
1 stop14h 34mAmerican Airlines
Mon 8/116:00 amSTL - SDF
1 stop16h 13mAmerican Airlines
Deal found 6/12$185
This Delta deal was found by Cheapflights users on 6/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/76:00 amSDF - STL
1 stop4h 41mDelta
Mon 8/113:40 pmSTL - SDF
1 stop4h 34mDelta
Deal found 6/12$197
This Delta deal was found by Cheapflights users on 6/10. 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.
Mon 11/245:45 pmSDF - MLI
1 stop5h 45mDelta
Thu 11/275:00 pmMLI - SDF
1 stop4h 30mDelta
Deal found 6/10$214
This Mytrip deal was found by Cheapflights users on 6/11. 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.
Fri 7/118:13 pmSDF - STL
1 stop19h 26mSpirit Airlines
Sun 7/2010:47 amSTL - SDF
1 stop26h 08mSpirit Airlines
Deal found 6/11$219
This Mytrip deal was found by Cheapflights users on 6/11. 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 7/169:46 amSDF - ORD
1 stop14h 27mMultiple Airlines
Sat 7/195:51 amORD - SDF
2 stops26h 13mMultiple Airlines
Deal found 6/11$232

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 June 12, 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

6:50 pm-7:25 pm

Nonstop1h 35m

Chicago O'Hare Intl

Wed 8/27

3:13 pm-5:38 pm

Nonstop1h 25m

$97

LouisvilleChicago

SDF - MDW

SDFMDW

Louisville Intl

Mon 8/4

3:55 pm-4:10 pm

Nonstop1h 15m

Chicago Midway

Wed 8/27

10:05 am-12:25 pm

Nonstop1h 20m

$97

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Mon 9/29

10:55 am-11:33 am

Nonstop1h 38m

Chicago O'Hare Intl

Mon 9/29

7:50 pm-10:30 pm

Nonstop1h 40m

$116

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Tue 9/2

5:30 am-11:50 am

1 stop7h 20m

Chicago O'Hare Intl

Tue 9/9

7:30 am-2:35 pm

1 stop6h 05m

$117

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Mon 7/7

1:57 pm-9:38 am

1 stop20h 41m

Chicago O'Hare Intl

Thu 7/10

11:21 am-9:04 am

1 stop20h 43m

$172

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Sat 8/30

12:30 pm-7:19 pm

1 stop7h 49m

Chicago O'Hare Intl

Sat 9/6

5:30 pm-11:00 pm

1 stop4h 30m

$177

LouisvilleChicago

SDF - MDW

SDFMDW

Louisville Intl

Tue 11/11

10:15 am-12:32 pm

1 stop3h 17m

Chicago Midway

Tue 11/11

5:25 pm-11:56 pm

1 stop5h 31m

$177

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Thu 8/7

6:44 am-8:18 pm

1 stop14h 34m

Lambert-St Louis

Mon 8/11

6:00 am-11:13 pm

1 stop16h 13m

$185

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Thu 8/7

6:00 am-9:41 am

1 stop4h 41m

Lambert-St Louis

Mon 8/11

3:40 pm-9:14 pm

1 stop4h 34m

$197

LouisvilleMoline

SDF - MLI

SDFMLI

Louisville Intl

Mon 11/24

5:45 pm-10:30 pm

1 stop5h 45m

Moline Quad-City

Thu 11/27

5:00 pm-10:30 pm

1 stop4h 30m

$214

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

Showing 1-10 of 36 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 June 12, 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 June 12, 2025.

The most flights from SDF to USIL are scheduled on a Wednesday (41 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (27 on average).

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

Temperature in Illinois by month

Plan your trip to Illinois by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

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 June 12, 2025.
Get a feel of what it's like to fly with Southwest, Delta and United Airlines from Louisville to Illinois by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,287 reviews

Food

7.1

Boarding

8.2

Comfort

8.0

Overall

8.0

Entertainment

7.6

Crew

8.6

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
4,287 reviews
Southwest
8.0
Very good
4,287 reviews

Food

7.1

Boarding

8.2

Comfort

8.0

Overall

8.0

Entertainment

7.6

Crew

8.6

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
7,950 reviews
Southwest
8.0
Very good
4,287 reviews

Food

7.1

Boarding

8.2

Comfort

8.0

Overall

8.0

Entertainment

7.6

Crew

8.6

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
8,790 reviews
Southwest
8.0
Very good
4,287 reviews

Food

7.1

Boarding

8.2

Comfort

8.0

Overall

8.0

Entertainment

7.6

Crew

8.6

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
7.3
Good
725 reviews
Southwest
8.0
Very good
4,287 reviews

Food

7.1

Boarding

8.2

Comfort

8.0

Overall

8.0

Entertainment

7.6

Crew

8.6

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
4,287 reviews

Food

7.1

Boarding

8.2

Comfort

8.0

Overall

8.0

Entertainment

7.6

Crew

8.6

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 Southwest. According to our data, you can fly for as low as $49. Users have also found prices from $65 and $82 on United Airlines and Spirit 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 (95%), Copa Airlines (92%) or Air Canada (88%) 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 $1,690 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

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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$106Average$287FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$111Average$294FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$172Average$275FlexibilityNo cancel feeOn-time63%

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