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$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 5/31. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — ORD
May 6 — May 131
Tue 5/6
Tue 5/13
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 May 1, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$147
(FlightHub)

One-way from

$67
(FlightHub)

Popular in

March

Cheapest in

August

Average price

$231

Good round-trip deal

$283 or less

Good one-way deal

$173 or less
Provider with most accurate pricing for Louisville Intl-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for Louisville Intl-Chicago (CHI) flights.
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From Louisville Intl to Illinois
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One-way flight from Louisville Intl to Illinois
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Highest demand for flights based on searches. 5% potential increase in price ($14 potential increase over avg. RT price).
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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 May 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 May 1, 2025.

This FlightHub deal was found by Cheapflights users on 4/30. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/282:07 pmSDF - ORD
1 stop7h 01mSpirit Airlines
Wed 6/46:30 amORD - SDF
1 stop5h 42mSpirit Airlines
Deal found 4/30$147
This American Airlines deal was found by Cheapflights users on 4/30. 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 5/248:56 amSDF - ORD
Nonstop1h 36mAmerican Airlines
Sun 5/258:25 pmORD - SDF
Nonstop1h 36mAmerican Airlines
Deal found 4/30$179
This United Airlines deal was found by Cheapflights users on 4/30. 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 5/288:55 amSDF - ORD
Nonstop1h 37mUnited Airlines
Wed 6/47:40 pmORD - SDF
Nonstop1h 34mUnited Airlines
Deal found 4/30$190
This Delta deal was found by Cheapflights users on 4/30. 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 5/2410:52 amSDF - ORD
1 stop6h 38mDelta
Sun 5/256:24 amORD - SDF
1 stop4h 37mDelta
Deal found 4/30$199
This Delta deal was found by Cheapflights users on 4/30. 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 5/245:55 pmSDF - MDW
1 stop4h 18mDelta
Sun 5/254:15 pmMDW - SDF
1 stop6h 50mDelta
Deal found 4/30$199
This Southwest deal was found by Cheapflights users on 4/30. 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.
Sat 5/246:00 pmSDF - MDW
Nonstop1h 15mSouthwest
Mon 5/269:10 amMDW - SDF
Nonstop1h 10mSouthwest
Deal found 4/30$202
This Southwest deal was found by Cheapflights users on 4/30. 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 5/305:05 pmSDF - ORD
1 stop5h 25mSouthwest
Tue 6/37:30 amORD - SDF
1 stop7h 55mSouthwest
Deal found 4/30$210
This United Airlines deal was found by Cheapflights users on 4/30. 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.
Thu 5/157:00 amSDF - MLI
1 stop4h 11mUnited Airlines
Mon 5/195:25 pmMLI - SDF
1 stop4h 05mUnited Airlines
Deal found 4/30$239
This United Airlines deal was found by Cheapflights users on 4/30. 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 6/147:00 amSDF - STL
1 stop4h 45mUnited Airlines
Sat 6/215:27 pmSTL - SDF
1 stop3h 47mUnited Airlines
Deal found 4/30$251
This American Airlines deal was found by Cheapflights users on 4/30. 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 6/146:12 amSDF - STL
2 stops7h 42mAmerican Airlines
Sat 6/214:17 pmSTL - SDF
1 stop5h 00mAmerican Airlines
Deal found 4/30$256
This Southwest deal was found by Cheapflights users on 4/30. 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 6/36:25 amSDF - STL
1 stop6h 25mSouthwest
Thu 6/58:20 pmSTL - SDF
1 stop3h 05mSouthwest
Deal found 4/30$272
This Mytrip deal was found by Cheapflights users on 4/30. 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 9/59:47 amSDF - ORD
2 stops27h 21mMultiple Airlines
Sun 9/74:38 pmORD - SDF
2 stops23h 02mMultiple Airlines
Deal found 4/30$309

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 May 1, 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 5/28

2:07 pm-8:08 pm

1 stop7h 01m

Chicago O'Hare Intl

Wed 6/4

6:30 am-1:12 pm

1 stop5h 42m

$147

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Sat 5/24

8:56 am-9:32 am

Nonstop1h 36m

Chicago O'Hare Intl

Sun 5/25

8:25 pm-11:01 pm

Nonstop1h 36m

$179

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Wed 5/28

8:55 am-9:32 am

Nonstop1h 37m

Chicago O'Hare Intl

Wed 6/4

7:40 pm-10:14 pm

Nonstop1h 34m

$190

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Sat 5/24

10:52 am-4:30 pm

1 stop6h 38m

Chicago O'Hare Intl

Sun 5/25

6:24 am-12:01 pm

1 stop4h 37m

$199

LouisvilleChicago

SDF - MDW

SDFMDW

Louisville Intl

Sat 5/24

5:55 pm-9:13 pm

1 stop4h 18m

Chicago Midway

Sun 5/25

4:15 pm-12:05 am

1 stop6h 50m

$199

LouisvilleChicago

SDF - MDW

SDFMDW

Louisville Intl

Sat 5/24

6:00 pm-6:15 pm

Nonstop1h 15m

Chicago Midway

Mon 5/26

9:10 am-11:20 am

Nonstop1h 10m

$202

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Fri 5/30

5:05 pm-9:30 pm

1 stop5h 25m

Chicago O'Hare Intl

Tue 6/3

7:30 am-4:25 pm

1 stop7h 55m

$210

LouisvilleMoline

SDF - MLI

SDFMLI

Louisville Intl

Thu 5/15

7:00 am-10:11 am

1 stop4h 11m

Moline Quad-City

Mon 5/19

5:25 pm-10:30 pm

1 stop4h 05m

$239

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Sat 6/14

5:51 pm-11:51 pm

1 stop7h 00m

Lambert-St Louis

Sat 6/21

1:23 pm-7:00 pm

1 stop4h 37m

$251

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Sat 6/14

6:12 am-12:54 pm

2 stops7h 42m

Lambert-St Louis

Sat 6/21

4:17 pm-10:17 pm

1 stop5h 00m

$256

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Showing 1-10 of 28 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 May 1, 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 May 1, 2025.

The most flights from SDF to USIL are scheduled on a Wednesday (42 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (10 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 May 1, 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
4,294 reviews

Comfort

8.0

Boarding

8.2

Entertainment

7.6

Food

7.1

Crew

8.6

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!
Southwest
8.0
Very good
4,294 reviews
Southwest
8.0
Very good
4,294 reviews

Comfort

8.0

Boarding

8.2

Entertainment

7.6

Food

7.1

Crew

8.6

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!
Delta
8.0
Very good
7,934 reviews
Southwest
8.0
Very good
4,294 reviews

Comfort

8.0

Boarding

8.2

Entertainment

7.6

Food

7.1

Crew

8.6

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!
United Airlines
7.4
Good
8,696 reviews
Southwest
8.0
Very good
4,294 reviews

Comfort

8.0

Boarding

8.2

Entertainment

7.6

Food

7.1

Crew

8.6

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!
Allegiant Air
7.3
Good
734 reviews
Southwest
8.0
Very good
4,294 reviews

Comfort

8.0

Boarding

8.2

Entertainment

7.6

Food

7.1

Crew

8.6

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,294 reviews

Comfort

8.0

Boarding

8.2

Entertainment

7.6

Food

7.1

Crew

8.6

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!

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 Spirit Airlines. According to our data, you can fly for as low as $67. Users have also found prices from $90 and $90 on American Airlines and Southwest, 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 GoJet (100%), Copa Airlines (95%) or Air Wisconsin (85%) 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 $127. While the most popular route (Louisville Intl - Chicago O'Hare Intl) can be booked for $194 on average our data indicates $951 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

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Top 4 airlines flying from Louisville to Illinois

Discover the top 4 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 May 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$106Average$331FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$112Average$274FlexibilityNo cancel feeOn-time71%
DeltaCheapest$135Average$365FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$172Average$275FlexibilityNo cancel feeOn-time63%

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