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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 2/17. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — ORD
Dec 26 — Jan 21
Fri 12/26
Fri 1/2
1 adult, Economy
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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 November 26, 2025.

This United Airlines deal was found by Cheapflights users on 11/24. 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 12/2410:50 amSDF - ORD
Nonstop1h 43mUnited Airlines
Wed 12/3110:35 amORD - SDF
Nonstop1h 38mUnited Airlines
Deal found 11/24$97
This United Airlines deal was found by Cheapflights users on 11/25. 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.
Wed 12/1712:20 pmSDF - ORD
Nonstop1h 38mUnited Airlines
Wed 12/247:52 pmORD - SDF
Nonstop1h 38mUnited Airlines
Deal found 11/25$147
This American Airlines deal was found by Cheapflights users on 11/24. 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 12/248:05 amSDF - ORD
Nonstop1h 40mAmerican Airlines
Thu 12/251:30 pmORD - SDF
Nonstop1h 29mAmerican Airlines
Deal found 11/24$148
This Delta deal was found by Cheapflights users on 11/24. 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 12/241:52 pmSDF - ORD
1 stop4h 30mDelta
Thu 12/256:02 pmORD - SDF
1 stop3h 56mDelta
Deal found 11/24$157
This Southwest deal was found by Cheapflights users on 11/24. 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 12/315:30 amSDF - MDW
1 stop5h 40mSouthwest
Thu 1/110:00 amMDW - SDF
Nonstop1h 25mSouthwest
Deal found 11/24$157
This Delta deal was found by Cheapflights users on 11/24. 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 12/241:45 pmSDF - ORD
2 stops7h 51mDelta
Wed 12/317:00 amORD - SDF
1 stop5h 12mDelta
Deal found 11/24$162
This American Airlines deal was found by Cheapflights users on 11/24. 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 12/176:15 amSDF - ORD
1 stop7h 17mAmerican Airlines
Wed 12/241:30 pmORD - SDF
Nonstop1h 29mAmerican Airlines
Deal found 11/24$174
This United Airlines deal was found by Cheapflights users on 11/24. 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 12/249:05 amSDF - ORD
Nonstop1h 44mUnited Airlines
Sat 12/277:25 amORD - SDF
Nonstop1h 38mUnited Airlines
Deal found 11/24$196
This United Airlines deal was found by Cheapflights users on 11/26. 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.
Tue 12/169:00 amSDF - ORD
Nonstop1h 40mUnited Airlines
Wed 12/179:05 amORD - SDF
Nonstop1h 27mUnited Airlines
Deal found 11/26$197
This Southwest deal was found by Cheapflights users on 11/24. 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 12/167:05 pmSDF - MDW
Nonstop1h 15mSouthwest
Wed 12/1710:05 amMDW - SDF
Nonstop1h 25mSouthwest
Deal found 11/24$197
This Southwest deal was found by Cheapflights users on 11/24. 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 12/289:05 pmSDF - MDW
Nonstop1h 15mSouthwest
Tue 1/207:55 pmMDW - SDF
Nonstop1h 15mSouthwest
Deal found 11/24$216
This Delta deal was found by Cheapflights users on 11/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/1612:58 pmSDF - ORD
1 stop6h 45mDelta
Wed 12/176:45 amORD - SDF
1 stop4h 28mDelta
Deal found 11/26$217

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 November 26, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$97
(United Airlines)

One-way from

$49
(United Airlines)

Popular in

March

Cheapest in

April

Average price

$207

Good round-trip deal

$322 or less

Good one-way deal

$176 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
High demand for flights, 0% potential price rise
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 November 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 November 26, 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

Wed 12/24

10:50 am-11:33 am

Nonstop1h 43m

Chicago O'Hare Intl

Wed 12/31

10:35 am-1:13 pm

Nonstop1h 38m

$97

LouisvilleChicago

SDF - MDW

SDFMDW

Louisville Intl

Sat 1/17

6:30 am-6:55 am

Nonstop1h 25m

Chicago Midway

Sun 1/18

10:00 am-12:15 pm

Nonstop1h 15m

$97

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Sat 1/17

2:05 pm-2:48 pm

Nonstop1h 43m

Chicago O'Hare Intl

Sun 1/18

3:00 pm-5:37 pm

Nonstop1h 37m

$97

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Wed 12/24

1:52 pm-5:22 pm

1 stop4h 30m

Chicago O'Hare Intl

Thu 12/25

6:02 pm-10:58 pm

1 stop3h 56m

$157

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Sat 1/17

6:23 am-11:47 am

1 stop6h 24m

Chicago O'Hare Intl

Sun 1/18

5:30 am-11:37 am

1 stop5h 07m

$157

LouisvilleChicago

SDF - MDW

SDFMDW

Louisville Intl

Sat 2/14

6:40 am-7:05 am

Nonstop1h 25m

Chicago Midway

Sat 2/21

10:45 am-1:05 pm

Nonstop1h 20m

$157

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Wed 12/24

1:52 pm-5:22 pm

1 stop4h 30m

Chicago O'Hare Intl

Wed 12/31

7:00 am-1:12 pm

1 stop5h 12m

$157

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Sat 2/14

5:00 pm-8:44 pm

1 stop4h 44m

Chicago O'Hare Intl

Sat 2/21

2:03 pm-9:14 pm

1 stop6h 11m

$157

LouisvilleChicago

SDF - MDW

SDFMDW

Louisville Intl

Sat 2/14

8:55 am-3:21 pm

1 stop7h 26m

Chicago Midway

Sat 2/21

9:34 am-4:03 pm

1 stop5h 29m

$157

LouisvilleChicago

SDF - MDW

SDFMDW

Louisville Intl

Wed 12/31

11:45 am-4:35 pm

2 stops5h 50m

Chicago Midway

Thu 1/1

10:00 am-12:25 pm

Nonstop1h 25m

$162

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/26

Showing 1-10 of 53 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, January is the cheapest month in which you can book a flight from Louisville to Illinois (average of $73). 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 November 26, 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 25% 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 16, 2024.

Travelers seeking maximum savings on their Louisville to Illinois flight should consider departing on Wednesday evenings when fares are most often at their lowest. Saturday evenings 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 November 26, 2025.

The most flights from SDF to USIL are scheduled on a Monday (39 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (6 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 November 26, 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
4,254 reviews

Crew

8.6

Entertainment

7.5

Food

7.0

Boarding

8.1

Comfort

8.0

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,254 reviews
Southwest
8.0
Very good
4,254 reviews

Crew

8.6

Entertainment

7.5

Food

7.0

Boarding

8.1

Comfort

8.0

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
United Airlines
7.4
Good
9,050 reviews
Southwest
8.0
Very good
4,254 reviews

Crew

8.6

Entertainment

7.5

Food

7.0

Boarding

8.1

Comfort

8.0

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
American Airlines
7.2
Good
11,037 reviews
Southwest
8.0
Very good
4,254 reviews

Crew

8.6

Entertainment

7.5

Food

7.0

Boarding

8.1

Comfort

8.0

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

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, 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 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 (90%), Copa Airlines (89%) 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 $85. While the most popular route (Louisville Intl - Chicago O'Hare Intl) can be booked for $131 on average, our data indicates $908 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, January is the cheapest month in which you can book a flight from Louisville to Illinois (average of $73). 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 November 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$97Average$275FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$97Average$251FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$115Average$273FlexibilityNo cancel feeOn-time69%

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