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$89+ 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 4/21. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — ORD
Jan 26 — Feb 21
Sun 1/26
Sun 2/2
1 adult, Economy
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Cheap flight deals from Louisville to Illinois

Discover tips and strategies to find the most affordable flight options for your journey from Louisville (SDF) to Illinois (USIL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 21, 2025.

Round-trip from

$186
(Mytrip)

One-way from

$89
(Delta)
From Louisville Intl to Illinois
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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 January 21, 2025.

This Mytrip deal was found by Cheapflights users on 1/20. 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 3/39:30 pmSDF - ORD
1 stop14h 10mSpirit Airlines
Wed 3/55:10 amORD - SDF
1 stop11h 58mSpirit Airlines
Deal found 1/20$188
This American Airlines deal was found by Cheapflights users on 1/19. 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 2/156:45 pmSDF - ORD
Nonstop1h 42mAmerican Airlines
Mon 2/176:30 pmORD - SDF
Nonstop1h 37mAmerican Airlines
Deal found 1/19$216
This Delta deal was found by Cheapflights users on 1/19. 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 2/157:35 amSDF - ORD
1 stop6h 43mDelta
Mon 2/176:59 amORD - SDF
1 stop3h 32mDelta
Deal found 1/19$236
This Delta deal was found by Cheapflights users on 1/20. 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.
Sun 4/67:35 amSDF - MDW
1 stop6h 00mDelta
Wed 4/94:59 pmMDW - SDF
1 stop5h 59mDelta
Deal found 1/20$236
This Southwest deal was found by Cheapflights users on 1/20. 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 2/226:40 amSDF - MDW
Nonstop1h 20mSouthwest
Sun 2/238:25 pmMDW - SDF
Nonstop1h 15mSouthwest
Deal found 1/20$245
This American Airlines deal was found by Cheapflights users on 1/19. 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 3/16:40 amSDF - MLI
1 stop5h 26mAmerican Airlines
Sun 3/27:45 amMLI - SDF
1 stop3h 26mAmerican Airlines
Deal found 1/19$254
This Southwest deal was found by Cheapflights users on 1/19. 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 3/188:55 amSDF - ORD
1 stop5h 10mSouthwest
Tue 3/251:50 pmORD - SDF
2 stops7h 55mSouthwest
Deal found 1/19$264
This Delta deal was found by Cheapflights users on 1/19. 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 2/412:36 pmSDF - STL
1 stop4h 07mDelta
Sat 2/86:43 amSTL - SDF
1 stop3h 48mDelta
Deal found 1/19$277
This Mytrip deal was found by Cheapflights users on 1/19. 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 2/77:25 pmSDF - ORD
2 stops21h 45mMultiple Airlines
Sun 2/96:15 pmORD - SDF
1 stop13h 18mMultiple Airlines
Deal found 1/19$281
This American Airlines deal was found by Cheapflights users on 1/19. 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.
Tue 2/46:23 pmSDF - STL
1 stop4h 46mAmerican Airlines
Sat 2/811:47 amSTL - SDF
2 stops9h 18mAmerican Airlines
Deal found 1/19$282
This United Airlines deal was found by Cheapflights users on 1/19. 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 2/77:00 amSDF - ORD
Nonstop1h 45mUnited Airlines
Sun 2/96:05 pmORD - SDF
Nonstop1h 32mUnited Airlines
Deal found 1/19$351
This Southwest deal was found by Cheapflights users on 1/19. 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 3/205:25 pmSDF - STL
1 stop7h 15mSouthwest
Fri 3/287:15 amSTL - SDF
2 stops8h 15mSouthwest
Deal found 1/19$360

Find flights from Louisville to Illinois within your budget

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 January 21, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Fri 2/28

9:30 pm-10:40 am

1 stop14h 10m

Chicago O'Hare Intl

Mon 3/3

7:10 am-8:25 pm

1 stop12h 15m

$186

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Sat 2/15

6:45 pm-7:27 pm

Nonstop1h 42m

Chicago O'Hare Intl

Mon 2/17

6:30 pm-9:07 pm

Nonstop1h 37m

$216

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Sat 2/15

7:35 am-1:18 pm

1 stop6h 43m

Chicago O'Hare Intl

Mon 2/17

6:59 am-11:31 am

1 stop3h 32m

$236

LouisvilleChicago

SDF - MDW

SDFMDW

Louisville Intl

Sun 4/6

7:35 am-12:35 pm

1 stop6h 00m

Chicago Midway

Wed 4/9

4:59 pm-11:58 pm

1 stop5h 59m

$236

LouisvilleChicago

SDF - MDW

SDFMDW

Louisville Intl

Sat 2/22

6:40 am-7:00 am

Nonstop1h 20m

Chicago Midway

Sun 2/23

8:25 pm-10:40 pm

Nonstop1h 15m

$245

LouisvilleMoline

SDF - MLI

SDFMLI

Louisville Intl

Sat 3/1

6:40 am-11:06 am

1 stop5h 26m

Moline Quad-City

Sun 3/2

7:45 am-12:11 pm

1 stop3h 26m

$254

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Tue 3/18

8:55 am-1:05 pm

1 stop5h 10m

Chicago O'Hare Intl

Tue 3/25

1:50 pm-10:45 pm

2 stops7h 55m

$264

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Tue 2/4

12:36 pm-3:43 pm

1 stop4h 07m

Lambert-St Louis

Sat 2/8

6:43 am-11:31 am

1 stop3h 48m

$277

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Fri 2/7

7:25 pm-4:10 pm

2 stops21h 45m

Chicago O'Hare Intl

Sun 2/9

6:15 pm-8:33 am

1 stop13h 18m

$281

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Tue 2/4

6:23 pm-10:09 pm

1 stop4h 46m

Lambert-St Louis

Sat 2/8

11:47 am-10:05 pm

2 stops9h 18m

$282

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/20

Showing 1-10 of 23 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.

Travel insights for flights from Louisville to Illinois

Get recent, data-driven insights about flights from Louisville to Illinois including ideal travel times, pricing trends, and more.

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 $320). 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 January 21, 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 January 21, 2025.

The most flights from SDF to USIL are scheduled on a Friday (32 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (20 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 January 21, 2025.
Get a feel of what it's like to fly with Spirit Airlines, United Airlines and Southwest 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
8.1
Very good
4,659 reviews

Crew

8.7

Boarding

8.2

Overall

8.1

Comfort

8.1

Entertainment

7.7

Food

7.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Southwest
8.1
Very good
4,659 reviews
Southwest
8.1
Very good
4,659 reviews

Crew

8.7

Boarding

8.2

Overall

8.1

Comfort

8.1

Entertainment

7.7

Food

7.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Delta
8.0
Very good
8,521 reviews
Southwest
8.1
Very good
4,659 reviews

Crew

8.7

Boarding

8.2

Overall

8.1

Comfort

8.1

Entertainment

7.7

Food

7.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

United Airlines
7.4
Good
8,982 reviews
Southwest
8.1
Very good
4,659 reviews

Crew

8.7

Boarding

8.2

Overall

8.1

Comfort

8.1

Entertainment

7.7

Food

7.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,659 reviews

Crew

8.7

Boarding

8.2

Overall

8.1

Comfort

8.1

Entertainment

7.7

Food

7.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Spirit Airlines
6.3
Okay
8,113 reviews
Southwest
8.1
Very good
4,659 reviews

Crew

8.7

Boarding

8.2

Overall

8.1

Comfort

8.1

Entertainment

7.7

Food

7.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

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 Delta. According to our data, you can fly for as low as $89. Users have also found prices from $91 and $108 on Spirit 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 Envoy Air (97%), Qatar Airways (93%) or American 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 $167. While the most popular route (Louisville Intl - Chicago O'Hare Intl) can be booked for $232 on average our data indicates $1,171 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 $320). 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.

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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 January 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$114Average$288FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$116Average$261FlexibilityNo cancel feeOn-time69%
DeltaCheapest$135Average$326FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$156Average$282FlexibilityNo cancel feeOn-time63%
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