$49 Find Cheap Flights from Louisville to Illinois

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Louisville to Illinois departing on 1/17. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Illinois

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Louisville to Illinois, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Louisville to Illinois, as well as popular online travel agencies
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Cheap Flights from Louisville to Illinois

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Chicago
Chicagononstop$97
Moline
Moline1 stop$244
St. Louis
St. Louis1 stop$257
Chicago
Chicagononstop$97
Moline
Moline1 stop$244
St. Louis
St. Louis1 stop$257

Book Cheap Louisville to Illinois Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Louisville to Illinois that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Louisville to Illinois

Sat, Jan 17 - Sun, Jan 18
United Airlines Logo
5:35 am - 6:19 amSDF-ORD
1h 44mnonstop
United Airlines Logo
3:00 pm - 5:37 pmORD-SDF
1h 37mnonstop
$97United Airlines
Find Deal
Sat, Jan 17 - Sun, Jan 18
Southwest Logo
4:05 pm - 4:25 pmSDF-MDW
1h 20mnonstop
Southwest Logo
7:55 pm - 10:10 pmMDW-SDF
1h 15mnonstop
$97Southwest
Find Deal
Sat, Jan 17 - Sun, Jan 18
American Airlines Logo
8:07 am - 9:00 amSDF-ORD
1h 53mnonstop
American Airlines Logo
8:49 pm - 11:19 pmORD-SDF
1h 30mnonstop
$98American Airlines
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Sat, Jan 17 - Sun, Jan 18
American Airlines Logo
8:07 am - 9:00 amSDF-ORD
1h 53mnonstop
American Airlines Logo
8:49 pm - 11:19 pmORD-SDF
1h 30mnonstop
$99American Airlines
Find Deal
Sat, Feb 14 - Sat, Feb 21
Southwest Logo
6:40 am - 7:05 amSDF-MDW
1h 25mnonstop
Southwest Logo
6:15 pm - 8:30 pmMDW-SDF
1h 15mnonstop
$127Southwest
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Sun, Jan 18 - Wed, Jan 21
American Airlines Logo
1:32 pm - 2:20 pmSDF-ORD
1h 48mnonstop
American Airlines Logo
10:01 am - 12:32 pmORD-SDF
1h 31mnonstop
$147American Airlines
Find Deal
Sun, Feb 15 - Mon, Feb 23
United Airlines Logo
5:35 am - 6:19 amSDF-ORD
1h 44mnonstop
United Airlines Logo
5:50 pm - 8:14 pmORD-SDF
1h 24mnonstop
$156United Airlines
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Sat, Jan 17 - Sun, Jan 18
Delta Logo
6:23 am - 11:47 amSDF-ORD
6h 24m1 stop
Delta Logo
5:30 am - 11:37 amORD-SDF
5h 07m1 stop
$157Delta
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Sat, Feb 14 - Sat, Feb 21
Delta Logo
5:33 am - 10:06 amSDF-MDW
5h 33m1 stop
Delta Logo
9:34 am - 4:03 pmMDW-SDF
5h 29m1 stop
$157Delta
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Thu, Jan 22 - Mon, Jan 26
Spirit Airlines Logo
3:36 pm - 11:46 pmSDF-ORD
9h 10m1 stop
Spirit Airlines Logo
8:43 pm - 2:41 pmORD-SDF
16h 58m1 stop
$170Spirit Airlines
Find Deal
Booking Insights

KAYAK's insights & trends for Louisville to Illinois flights

Get data-powered insights and trends into flights from Louisville to Illinois to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest Louisville to Illinois flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to Illinois from Louisville found in the last 72 hours was to Chicago, at $101 round-trip. The most popular route is from Louisville (SDF) to Chicago O'Hare Intl Airport (ORD), and the cheapest round-trip airline ticket found on this route in the last 72 hours was $252.

Can I save money by flying with a layover from Louisville to Illinois?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $229, prices are generally cheapest when you fly direct.

What is the cheapest month to fly from Louisville to Illinois?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Louisville to Illinois, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Louisville to Illinois is April, when tickets cost $207 (return) on average. On the other hand, the most expensive months are March and July, when the average cost of round-trip tickets is $287 and $275 respectively.

What’s the cheapest day of the week to fly from Louisville to Illinois?

The average price of all round-trip flights from Louisville to Illinois clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Illinois on a Thursday and more expensive on a Sunday. On your return trip to Louisville, you should consider flying back on a Saturday, and avoid Mondays for better deals.

How far in advance should I book a flight from Louisville to Illinois?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Louisville to Illinois, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Louisville to Illinois, you should book around 4 weeks before departure, which saves you about 70% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 4 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$49
Most popular time to fly and prices are also 16% lower on average.
Flight from Louisville to Chicago O'Hare Airport

FAQs - booking Illinois flights

  • How does KAYAK find such low prices on flights from Louisville to Illinois?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Louisville to Illinois.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Louisville to Illinois?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Louisville to Illinois is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Louisville to Illinois?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Louisville to Illinois with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Louisville to Illinois?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Louisville to Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to Illinois?

    The cheapest time of day to fly to Illinois is generally in the morning, when round-trip flights cost $519 on average. Morning departures are around 41% cheaper than evening flights, on average. The most expensive time of day to fly to Illinois is generally in the evening, which is peak travel time and where the average cost of a ticket is $880.

Top tips for finding cheap flights to Illinois

  • Looking for a cheap flight? 25% of our users found tickets from Louisville to the following destinations at these prices or less: Chicago $230 one-way - $326 round-trip; Chicago $156 one-way - $427 round-trip

Reviews of the top 3 airlines serving from Louisville to Illinois

 
See real verified KAYAK customer reviews for airlines flying from Louisville to Illinois. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Louisville to Illinois? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4251 reviews
8.0Comfort
7.0Food
8.1Boarding
7.5Entertainment
8.6Crew
Airline reviews

Airline travel is always too cramped to really be pleasant, but the cabin crew on this flight did a pretty good job of making up for it by putting on some music during boarding and sprinkling a few funny remarks into the safety briefing and announcements, and just generally being friendly and helpful. It definitely reminded me of why I prefer the in-flight experience on Southwest!

10.0 ExcellentDavid, Nov 2025BUF - PHX
Read more Southwest reviews

Airline travel is always too cramped to really be pleasant, but the cabin crew on this flight did a pretty good job of making up for it by putting on some music during boarding and sprinkling a few funny remarks into the safety briefing and announcements, and just generally being friendly and helpful. It definitely reminded me of why I prefer the in-flight experience on Southwest!

No delays and arrived to destination 30 min early. Staff was super friendly.

San Diego airport is brand new, spacious, airy and very smooth checkin at SW baggage drop.

It was rough. The staff was unprofessional, the choice of on board drinks terrible, it was cramped in space at every airport, they always ran out of overhead bin space so they pressured people to check bags for free or we couldn’t leave on the plane— so I did check my bag to help, and they nearly lost my bag. My bag did not arrive on the luggage belt, another man on my flight and I had to waste our time going to the baggage office to search for our bags. I would only fly southwest again if it was my last choice. Also, my flights were consistently delayed over and over again— at one point they straight up told us we were waiting for the pilot to arrive.

Crew could have been friendlier, maybe I'm spoiled by SW crews. In flight wifi was good. Would be nice to have more food offerings on a 4 plus hour flight

Had to get off plane from prior flight even though I had to reboard same plane to continue to my final destination.

Everything a cheap airline should be at normal airline rates.

Plane crashed into a bus or some other vehicle on the ground while pulling out of the gate. No injuries, but wing tip was damaged and returned to gate for “maintenance issues” and we departed 5 hours later because the plane went out of service and new plane was flown in from a nearby airport, Midway.

Ever since Southwest starting charging for bags, passengers don't want to pay to check their bags, so the gate agents have to beg people to check their roller bags now because there's "not enough space". This was a terrible business move by Southwest.

Full cans of soda would be nice. A choice between two snacks would be appreciated.

Door to door, the crew and staff were amazing. It was a stressful travel day with delays, but they were focused on customers and doing what they could to get us to our destinations.

Flight was delayed only slightly before takeoff due to traffic control. However, the flight arrived early to ORD. Good flight. United has been very reliable for me.

Another delayed flight. When the delays exceed the duration of the flight, it’s a problem.

After boarding the plane in Chicago, the passengers were told that there was a technical problem with the plane. Passengers remained on the plane as they tried to fix the problem. After what was probably an hour passengers were told that there was a need to change planes as the problem was not solved. Passengers disembarked and boarded another plane. After taxing to the runway and waiting for takeoff, passengers were told that owing to the thunderstorm the flight was unable to take off but would try and reroute. After some time passengers were told there wasn't enough fuel for the new route and the plane had to return to the gate for additional fuel. after another log delay the flight got underway. On the plane there was food, drinks, ice or entertainment. We were a glass of water, which appeared rationed. Flight arrived about 5 hours late. The pilot was fantastic and communicated with the passengers throughout the ordeal.

Better WiFi. I cannot understand that in 2025, United is so behind on a technology that is now a necessity and still painfully unreliable, slow and keeps disconnecting.

Trip was great. A wild landing in Ottawa with the wind and rain, but the pilot did a great job. Always love flying United.👍

Excellent experience. Starting with the agent at the Premier bag drop who noticed I was very early for my scheduled flight and offered to rebook me on an earlier flight with my seat preference. She would not let me leave the counter until she knew that all of the changes and new boarding pass showed up on my United app. At the gate, the flight boarded quickly such that we departed early and the flight was smooth. We arrived 20 minutes early at ORD and I was able to be home in time for dinner. One of the best flights I've had.

Salina to travers city was great! But the sept 24 Tranverse city was not! Traverse city to chichago was cancelled, i went to Denver & got to Salina 6 hours later!

See previous note about the passenger in Denver who threw my husband's bag out of the overhead bin in order to maker room for his own. And the flight attendant back up the new passenger.

Flight attendant in first class gave poor service (like he didn't want to be there) and food was awful. We sat waiting for gate upon arrival over 45 mins.

I enjoyed the extra leg room compared to other airlines. The first stewards made my daughter’s birthday special by giving her an extra snack. Then the last one coming home from Chicago to Appleton made our night really enjoyable Thanks for making our trip enjoyable

It was good..clean, comfy seat. Friendly warm welcoming crew. Was able to check my cabin luggage at the gate which I was able to pickup in a decent time from baggage claim. The app gave all updates from delays to baggage claim info. Overall smooth flight.

It was a typical flight. We had a delay which seems to be the normality now. And we had no in flight service due to conditions.

After we landed we sat on the tarmac for 1.5 hours waiting to get to our gate. Ridiculous.

Terrible. Flight delayed for more than 8 hours with only a $12 meal voucher provided for the inconvenience. The airplane did not have breaks on arrival yet they still made us go through the motions and board on time knowing we could not take off then sit for 40+ minutes before having to get of the time. A complete waste of my time. I cannot believe they can stay business with these shenanigans. I’ll avoid this company like the plague moving forward as the lack of accountability is disgraceful.

This was the best 2 flights I have had with American out of SGF. Great crew both flights.

Excellent - explanations were clear staff was nice and flight was comfortable

Lost bag and 2 days no word leaving for cruise no clothes or stuff

Any flight to ORD after about 2pm this summer has been challenging. Flight was delayed getting in (coming from ORD) and that led to it not leaving before a ground stop due to lightening before they could fuel the plane, and so forth. They made up some time but we were still late in arriving at ORD, and that led to missed connections.

Food was ok, but not as good as I have had before on AA.

Everything you need to know for your flight from Louisville to Illinois

Information on your arrival and departure airports