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Illinois

$67+ 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 2/3. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — ORD
Jan 27 — Feb 31
Tue 1/27
Tue 2/3
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 December 28, 2025.

This United Airlines deal was found by Cheapflights users on 12/26. 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 12/272:22 pmSDF - ORD
2 stops18h 26mUnited Airlines
Sun 12/2810:35 amORD - SDF
Nonstop1h 38mUnited Airlines
Deal found 12/26$349
This American Airlines deal was found by Cheapflights users on 12/27. 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.
Wed 12/313:44 pmSDF - ORD
1 stop18h 37mAmerican Airlines
Thu 1/110:53 amORD - SDF
Nonstop1h 37mAmerican Airlines
Deal found 12/27$363
This United Airlines deal was found by Cheapflights users on 12/25. 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 12/276:11 pmSDF - ORD
Nonstop1h 43mUnited Airlines
Sat 12/279:05 pmORD - SDF
2 stops21h 06mUnited Airlines
Deal found 12/25$379
This United Airlines deal was found by Cheapflights users on 12/26. 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 12/3110:50 amSDF - ORD
Nonstop1h 43mUnited Airlines
Wed 12/312:30 pmORD - SDF
1 stop23h 14mUnited Airlines
Deal found 12/26$387
This United Airlines deal was found by Cheapflights users on 12/27. 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 12/313:44 pmSDF - ORD
2 stops17h 03mUnited Airlines
Thu 1/110:35 amORD - SDF
Nonstop1h 38mUnited Airlines
Deal found 12/27$469
This American Airlines deal was found by Cheapflights users on 12/26. 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.
Fri 12/267:24 pmSDF - ORD
1 stop14h 57mAmerican Airlines
Sat 12/2710:53 amORD - SDF
Nonstop1h 37mAmerican Airlines
Deal found 12/26$491
This American Airlines deal was found by Cheapflights users on 12/25. 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.
Fri 12/262:00 pmSDF - ORD
Nonstop1h 45mAmerican Airlines
Fri 12/266:37 pmORD - SDF
1 stop13h 13mAmerican Airlines
Deal found 12/25$542
This Kiwi.com deal was found by Cheapflights users on 12/26. 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 12/315:05 amSDF - ORD
2 stops30h 13mMultiple Airlines
Wed 1/74:55 pmORD - SDF
1 stop25h 39mMultiple Airlines
Deal found 12/26$550
This United Airlines deal was found by Cheapflights users on 12/25. 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.
Fri 12/269:05 amSDF - ORD
Nonstop1h 44mUnited Airlines
Fri 12/2612:45 pmORD - SDF
2 stops22h 21mUnited Airlines
Deal found 12/25$590
This Kiwi.com deal was found by Cheapflights users on 12/26. 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.
Tue 12/305:05 amSDF - ORD
2 stops42h 19mMultiple Airlines
Thu 1/19:19 amORD - SDF
1 stop8h 45mMultiple Airlines
Deal found 12/26$594
This Southwest deal was found by Cheapflights users on 12/27. 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 12/285:05 amSDF - MDW
1 stop6h 20mSouthwest
Sat 1/33:45 pmMDW - SDF
Nonstop1h 10mSouthwest
Deal found 12/27$607
This Southwest deal was found by Cheapflights users on 12/27. 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 12/316:45 amSDF - MDW
Nonstop1h 15mSouthwest
Fri 1/29:30 amMDW - SDF
Nonstop1h 15mSouthwest
Deal found 12/27$654

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 December 28, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$133
(United Airlines)

One-way from

$67
(United Airlines)

Popular in

March

Cheapest in

November

Average price

$273

Good round-trip deal

$326 or less

Good one-way deal

$187 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. 0% potential increase in price ($1 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 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

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 December 28, 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 2/17

2:05 pm-2:50 pm

Nonstop1h 45m

Chicago O'Hare Intl

Tue 2/24

5:45 pm-8:09 pm

Nonstop1h 24m

$133

LouisvilleChicago

SDF - MDW

SDFMDW

Louisville Intl

Sat 1/17

6:30 am-6:55 am

Nonstop1h 25m

Chicago Midway

Tue 1/20

10:00 am-12:15 pm

Nonstop1h 15m

$138

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Tue 2/10

5:35 am-6:19 am

Nonstop1h 44m

Chicago O'Hare Intl

Thu 2/12

7:40 pm-10:13 pm

Nonstop1h 33m

$152

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Tue 2/17

10:46 am-1:20 pm

1 stop3h 34m

Chicago O'Hare Intl

Tue 2/24

5:25 am-11:27 am

1 stop5h 02m

$157

LouisvilleChicago

SDF - MDW

SDFMDW

Louisville Intl

Sat 2/7

6:30 am-6:55 am

Nonstop1h 25m

Chicago Midway

Mon 2/9

9:55 am-12:10 pm

Nonstop1h 15m

$157

LouisvilleChicago

SDF - MDW

SDFMDW

Louisville Intl

Tue 2/17

5:33 am-9:54 am

1 stop5h 21m

Chicago Midway

Tue 2/24

12:45 pm-8:28 pm

1 stop6h 43m

$157

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Sat 2/7

2:05 pm-2:48 pm

Nonstop1h 43m

Chicago O'Hare Intl

Sat 2/14

5:45 pm-8:09 pm

Nonstop1h 24m

$171

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Sat 1/17

7:50 am-1:08 pm

1 stop6h 18m

Chicago O'Hare Intl

Tue 1/20

7:05 am-2:36 pm

1 stop6h 31m

$174

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Wed 2/18

10:46 am-4:41 pm

1 stop6h 55m

Chicago O'Hare Intl

Mon 2/23

5:53 pm-11:58 pm

1 stop5h 05m

$174

LouisvilleChicago

SDF - MDW

SDFMDW

Louisville Intl

Sat 1/17

7:50 am-12:48 pm

1 stop5h 58m

Chicago Midway

Tue 1/20

1:31 pm-11:50 pm

2 stops9h 19m

$179

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/26

Showing 1-10 of 50 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, 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 December 28, 2025.

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 31% 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 December 27, 2025.

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 December 28, 2025.

The most flights from SDF to USIL are scheduled on a Saturday (40 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (29 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 December 28, 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
4,256 reviews

Boarding

8.1

Food

7.0

Overall

8.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Southwest
8.0
Very good
4,256 reviews
Southwest
8.0
Very good
4,256 reviews

Boarding

8.1

Food

7.0

Overall

8.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
United Airlines
7.4
Good
9,113 reviews
Southwest
8.0
Very good
4,256 reviews

Boarding

8.1

Food

7.0

Overall

8.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
American Airlines
7.2
Good
11,073 reviews
Southwest
8.0
Very good
4,256 reviews

Boarding

8.1

Food

7.0

Overall

8.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

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 $138, United Airlines can have you in Illinois from Louisville in 1h 25m. 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 $48 on American Airlines and United 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 Iberia (84%), Copa Airlines (84%) or Envoy Air (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 $119. While the most popular route (Louisville Intl - Chicago O'Hare Intl) can be booked for $133 on average, our data indicates $1,052 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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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 December 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$97Average$270FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$97Average$260FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$114Average$272FlexibilityNo cancel feeOn-time69%

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