$87 Find Cheap Flights from Sioux Falls 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 Sioux Falls to Illinois departing on 2/19. 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 Sioux Falls 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 Sioux Falls to Illinois, as well as popular online travel agencies
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Cheap Flights from Sioux Falls to Illinois

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Chicago
Chicagononstop$189
St. Louis
St. Louis1 stop$249
Chicago
Chicagononstop$189
St. Louis
St. Louis1 stop$249

Book Cheap Sioux Falls 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 Sioux Falls 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 Sioux Falls to Illinois

Sat, Feb 7 - Sat, Feb 14
United Airlines Logo
11:22 am - 1:15 pm
FSD
-
ORD
1h 53mnonstop
United Airlines Logo
8:45 am - 10:46 am
ORD
-
FSD
2h 01mnonstop
$189United Airlines
Fri, Mar 27 - Sun, Mar 29
United Airlines Logo
7:43 am - 9:35 am
FSD
-
ORD
1h 52mnonstop
United Airlines Logo
8:24 pm - 10:15 pm
ORD
-
FSD
1h 51mnonstop
$204United Airlines
Sat, Feb 7 - Mon, Feb 9
Delta Logo
11:00 am - 4:16 pm
FSD
-
MDW
5h 16m1 stop
Delta Logo
7:16 pm - 11:04 pm
MDW
-
FSD
3h 48m1 stop
$209Delta
Sat, Feb 7 - Sat, Feb 14
Delta Logo
1:02 pm - 5:55 pm
FSD
-
ORD
4h 53m1 stop
Delta Logo
6:15 am - 12:20 pm
ORD
-
FSD
6h 05m1 stop
$209Delta
Wed, Feb 18 - Sat, Feb 21
Delta Logo
1:00 pm - 6:40 pm
FSD
-
MDW
5h 40m1 stop
Delta Logo
9:34 am - 3:34 pm
MDW
-
FSD
6h 00m2 stops
$214Delta
Thu, Feb 19 - Sat, Feb 21
Delta Logo
10:55 am - 8:44 pm
FSD
-
ORD
9h 49m2 stops
Delta Logo
8:50 am - 3:34 pm
ORD
-
FSD
6h 44m1 stop
$214Delta
Thu, Feb 19 - Sat, Feb 21
Delta Logo
10:55 am - 8:44 pm
FSD
-
ORD
9h 49m2 stops
Delta Logo
6:30 am - 3:34 pm
ORD
-
FSD
9h 04m2 stops
$219Delta
Sun, Jan 25 - Sun, Feb 1
Multiple Airlines Logo
6:02 pm - 7:58 pm
FSD
-
MDW
25h 56m1 stop
Multiple Airlines Logo
7:30 am - 9:57 am
MDW
-
FSD
26h 27m1 stop
$227Multiple Airlines
Sat, Feb 7 - Sat, Feb 14
American Airlines Logo
12:19 pm - 2:13 pm
FSD
-
ORD
1h 54mnonstop
American Airlines Logo
1:15 pm - 9:40 pm
ORD
-
FSD
8h 25m1 stop
$243American Airlines
Sat, Feb 7 - Mon, Feb 9
American Airlines Logo
5:35 pm - 11:44 pm
FSD
-
ORD
6h 09m1 stop
American Airlines Logo
7:35 pm - 9:35 pm
ORD
-
FSD
2h 00mnonstop
$244American Airlines
Booking Insights

KAYAK's insights & trends for Sioux Falls to Illinois flights

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

What is the cheapest Sioux Falls to Illinois flight route?

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

The cheapest ticket to Illinois from Sioux Falls found in the last 72 hours was to Chicago, at $249 round-trip. The most popular route is from Sioux Falls (FSD) to Chicago O'Hare Intl Airport (ORD), and the cheapest round-trip airline ticket found on this route in the last 72 hours was $249.

Can I save money by flying with a layover from Sioux Falls 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 $249, prices are generally cheapest when you fly direct.

What is the cheapest month to fly from Sioux Falls to Illinois?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Sioux Falls 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 Sioux Falls to Illinois is January, when tickets cost $236 (return) on average. On the other hand, the most expensive months are June and March, when the average cost of round-trip tickets is $344 and $321 respectively.

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

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

For Sioux Falls to Illinois, Saturday is the cheapest day to fly on average and Monday is the most expensive. Flying from Illinois back to Sioux Falls, the best deals are generally found on Saturday, with Sunday being the most expensive.

How far in advance should I book a flight from Sioux Falls 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 Sioux Falls 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 Sioux Falls to Illinois, you should book around 3 weeks before departure, which saves you about 34% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 18 weeks before departure.

Good to know

Low seasonNovember
Cheapest flight$87
Best time to beat the crowds but there is an average 16% increase in price.
Most popular time to fly with an average 19% increase in price.
Flight from Sioux Falls to Chicago O'Hare Airport

FAQs - booking Illinois flights

  • How does KAYAK find such low prices on flights from Sioux Falls 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 Sioux Falls to Illinois.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Sioux Falls 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 Sioux Falls 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 Sioux Falls 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 Sioux Falls 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 Sioux Falls 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 at night, when round-trip flights cost $373 on average. Morning departures are around 8% 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 $494.

Top tips for finding cheap flights to Illinois

  • Looking for a cheap flight? 25% of our users found tickets from Sioux Falls to the following destinations at these prices or less: Chicago $289 one-way - $330 round-trip

Reviews of the top 3 airlines serving from Sioux Falls to Illinois

 
See real verified KAYAK customer reviews for airlines flying from Sioux Falls 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 Sioux Falls 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.
7.9
DeltaOverall score based on 8017 reviews
7.9Comfort
7.9Entertainment
8.5Crew
7.2Food
8.1Boarding
Airline reviews

Delta is a good airline. I've never had an issue with Delta. I'll continue to fly with them until they show me that I shouldn't.

8.0 ExcellentBrian, Dec 2025
DTW - TPA
Read more Delta reviews

Delta is a good airline. I've never had an issue with Delta. I'll continue to fly with them until they show me that I shouldn't.

The only thing nice I can say is the flight crew was really nice and apologetic about the situation. They shared as much information as they had and advised us on what we could do about missing connecting flights. The boarding process was so slow. The gate agent was working by herself and should have had someone working with her. It took almost an hour to board because she was trying to board a full flight of people and provide customer service to everyone who was flying standby and/or had questions. It was really chaotic. This didn't help the fact that we were delayed and folks were missing connections the longer it took.

The gate attendants and the crew were terrible. Because of high winds, they needed to carry more fuel, so they had to get volunteers to take the next flight at 6 am the next day. They did a terrible job of it - our flight ended up taking off just under 3 hours of the scheduled time. I hope to never fly Delta again.

Did not realize internet screen was hidden between seats and no info printed!!!!

2 of the seats in row 31 the entertainment system was not working, and one seat the tray table did not go all the way down. Flight arrived early and departed on time which was great.

Very good flight crew and very nice people staff were incredible especially the gate agent

Waited at the usual crowded gate at DCA where one ends up standing up because there aren't enough seats.

The flight was delayed for about 2 hrs. Other than it, it was good.

Advertised fruit trays with cheese, but only snacks handed out!

The plant way delayed departing by 3 hours. It was an old airplane with broken seats and armrests. The bathroom made a hollering sound. A really crappy flight experience and travel day all around.

They did the one thing that really matters - got to Chicago early.

The flight was on time. I generally don’t drink or eat on short flights and the seats were good and the flight attendants were friendly. That’s all I expect

It was nice to have gotten up upgraded to first class with a meal on a three hour flight

Very bad! They kept delaying my flight and wouldn’t do anything about it

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.👍

The boarding process needs to be fixed. The zone don't work, especially when there is hardly anyone in zones 3, 4,and 5, leaving the majority of the passengers backed up in the aisle, especially because passengers seated near the front are blocking passengers who are seated in the rear of the plane. It would also help if the size of carry on bags was more strictly enforced.

Awful. They won’t help me with anything. I booked on American but they abdicated to Iberia. The ticket was overpriced. Everything negative

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

Everything you need to know for your flight from Sioux Falls to Illinois

Information on your arrival and departure airports