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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 4/29. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — ORD
Mar 31 — Apr 71
Mon 3/31
Mon 4/7
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 March 26, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$142
(United Airlines)

One-way from

$49
(United Airlines)

Popular in

March

Cheapest in

August

Average price

$475

Good round-trip deal

$333 or less

Good one-way deal

$162 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
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($51 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease ($19 potential savings vs. average RT price).
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Average for round-trip flights in March 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 March 26, 2025.

This United Airlines deal was found by Cheapflights users on 3/25. 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 5/177:00 amSDF - ORD
Nonstop1h 36mUnited Airlines
Mon 5/195:57 pmORD - SDF
Nonstop1h 28mUnited Airlines
Deal found 3/25$142
This Southwest deal was found by Cheapflights users on 3/25. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/236:25 amSDF - MDW
Nonstop1h 15mSouthwest
Thu 4/248:55 pmMDW - SDF
Nonstop1h 15mSouthwest
Deal found 3/25$142
This American Airlines deal was found by Cheapflights users on 3/25. 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 4/188:57 pmSDF - ORD
Nonstop1h 33mAmerican Airlines
Sun 4/208:25 pmORD - SDF
Nonstop1h 35mAmerican Airlines
Deal found 3/25$171
This Southwest deal was found by Cheapflights users on 3/24. 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.
Fri 5/305:05 pmSDF - ORD
1 stop5h 25mSouthwest
Wed 6/47:30 amORD - SDF
1 stop7h 55mSouthwest
Deal found 3/24$176
This Delta deal was found by Cheapflights users on 3/24. 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.
Thu 4/242:37 pmSDF - ORD
1 stop7h 13mDelta
Mon 4/286:45 amORD - SDF
1 stop3h 38mDelta
Deal found 3/24$177
This Delta deal was found by Cheapflights users on 3/26. 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.
Thu 4/246:00 amSDF - MDW
1 stop4h 07mDelta
Mon 4/283:02 pmMDW - SDF
1 stop5h 32mDelta
Deal found 3/26$177
This Mytrip deal was found by Cheapflights users on 3/25. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/142:07 pmSDF - ORD
1 stop7h 01mSpirit Airlines
Sat 5/171:47 pmORD - SDF
1 stop26h 44mSpirit Airlines
Deal found 3/25$192
This American Airlines deal was found by Cheapflights users on 3/25. 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.
Wed 4/238:57 pmSDF - STL
1 stop13h 40mAmerican Airlines
Wed 4/307:03 pmSTL - SDF
1 stop4h 10mAmerican Airlines
Deal found 3/25$200
This Southwest deal was found by Cheapflights users on 3/24. 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 4/236:00 amSDF - STL
1 stop6h 35mSouthwest
Wed 4/3010:15 amSTL - SDF
2 stops7h 30mSouthwest
Deal found 3/24$222
This Mytrip deal was found by Cheapflights users on 3/24. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/811:23 amSDF - ORD
1 stop13h 06mMultiple Airlines
Thu 5/154:35 pmORD - SDF
2 stops25h 07mMultiple Airlines
Deal found 3/24$240
This Delta deal was found by Cheapflights users on 3/25. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/157:00 pmSDF - MLI
1 stop4h 25mDelta
Wed 4/165:05 pmMLI - SDF
1 stop5h 54mDelta
Deal found 3/25$247
This Delta deal was found by Cheapflights users on 3/25. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/156:00 amSDF - STL
1 stop4h 00mDelta
Sun 5/186:00 amSTL - SDF
1 stop5h 01mDelta
Deal found 3/25$277

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 March 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

Sat 5/17

7:00 am-7:36 am

Nonstop1h 36m

Chicago O'Hare Intl

Mon 5/19

5:57 pm-8:25 pm

Nonstop1h 28m

$142

LouisvilleChicago

SDF - MDW

SDFMDW

Louisville Intl

Thu 4/24

6:40 am-6:55 am

Nonstop1h 15m

Chicago Midway

Thu 4/24

8:55 pm-11:10 pm

Nonstop1h 15m

$142

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Fri 4/18

8:57 pm-9:30 pm

Nonstop1h 33m

Chicago O'Hare Intl

Sun 4/20

8:25 pm-11:00 pm

Nonstop1h 35m

$171

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Fri 5/30

5:05 pm-9:30 pm

1 stop5h 25m

Chicago O'Hare Intl

Wed 6/4

7:30 am-4:25 pm

1 stop7h 55m

$176

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Thu 4/24

2:37 pm-8:50 pm

1 stop7h 13m

Chicago O'Hare Intl

Mon 4/28

5:30 am-1:42 pm

1 stop7h 12m

$177

LouisvilleChicago

SDF - MDW

SDFMDW

Louisville Intl

Thu 4/24

6:00 am-9:07 am

1 stop4h 07m

Chicago Midway

Mon 4/28

6:45 pm-11:59 pm

1 stop4h 14m

$177

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Wed 5/14

2:07 pm-8:08 pm

1 stop7h 01m

Chicago O'Hare Intl

Sat 5/17

1:47 pm-5:31 pm

1 stop26h 44m

$192

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Wed 4/23

8:57 pm-9:37 am

1 stop13h 40m

Lambert-St Louis

Wed 4/30

7:03 pm-12:13 am

1 stop4h 10m

$200

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Wed 4/23

6:00 am-11:35 am

1 stop6h 35m

Lambert-St Louis

Wed 4/30

10:15 am-6:45 pm

2 stops7h 30m

$222

LouisvilleChicago

SDF - ORD

SDFORD

Louisville Intl

Thu 5/8

11:23 am-11:29 pm

1 stop13h 06m

Chicago O'Hare Intl

Thu 5/15

4:35 pm-6:42 pm

2 stops25h 07m

$240

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/24

Showing 1-10 of 29 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 $323). 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 March 26, 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 March 26, 2025.

The most flights from SDF to USIL are scheduled on a Wednesday (31 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (3 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 March 26, 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
8.1
Very good
4,274 reviews

Overall

8.1

Boarding

8.2

Comfort

8.1

Crew

8.6

Food

7.1

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Southwest
8.1
Very good
4,274 reviews
Southwest
8.1
Very good
4,274 reviews

Overall

8.1

Boarding

8.2

Comfort

8.1

Crew

8.6

Food

7.1

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Delta
8.0
Very good
7,891 reviews
Southwest
8.1
Very good
4,274 reviews

Overall

8.1

Boarding

8.2

Comfort

8.1

Crew

8.6

Food

7.1

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
United Airlines
7.4
Good
8,608 reviews
Southwest
8.1
Very good
4,274 reviews

Overall

8.1

Boarding

8.2

Comfort

8.1

Crew

8.6

Food

7.1

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Allegiant Air
7.3
Good
730 reviews
Southwest
8.1
Very good
4,274 reviews

Overall

8.1

Boarding

8.2

Comfort

8.1

Crew

8.6

Food

7.1

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,274 reviews

Overall

8.1

Boarding

8.2

Comfort

8.1

Crew

8.6

Food

7.1

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

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 United Airlines. According to our data, you can fly for as low as $49. Users have also found prices from $49 and $64 on Southwest and American 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 GoJet (100%), Royal Jordanian (93%) or Copa Airlines (93%) 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 $78. While the most popular route (Louisville Intl - Chicago O'Hare Intl) can be booked for $97 on average our data indicates $1,588 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 $323). 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 March 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$106Average$324FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$117Average$294FlexibilityNo cancel feeOn-time71%
DeltaCheapest$135Average$357FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$156Average$278FlexibilityNo cancel feeOn-time63%
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