$100 Find Cheap Flights from Illinois to South Dakota

1 adult

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

Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 22% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Useful Info
Useful Info

Good to know

Low seasonFebruary
High seasonJuly
Cheapest flight$100
Best time to beat the crowds but there is an average 3% increase in price.
Most popular time to fly with an average 1% increase in price.
Flight from St. Louis to Sioux Falls

FAQs for booking flights from Illinois to South Dakota

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

    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 Illinois to South Dakota.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Illinois to South Dakota 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 Illinois to South Dakota?

    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 Illinois to South Dakota 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 Illinois to South Dakota?

    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 Illinois to South Dakota up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • Which is the cheapest airport to fly into in South Dakota?

    Prices will differ depending on the departure airport, but generally, the cheapest airport to fly to in South Dakota is Sioux Falls Joe Foss Field Airport (FSD), with an average flight price of $243.

  • What is the cheapest day to fly to South Dakota?

    Based on KAYAK data, the cheapest day to fly to South Dakota is Tuesday where round-trip tickets can be as cheap as $312. On the other hand, the most expensive day to fly is Monday, where round-trip prices are $396 on average.

  • What is the cheapest time of day to fly to South Dakota?

    The cheapest time of day to fly to South Dakota is generally in the evening, when round-trip flights cost $279 on average. Morning departures are around 29% more expensive than evening flights, on average. The most expensive time of day to fly to South Dakota is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $559.

  • What is the cheapest flight to South Dakota?

    The cheapest ticket to South Dakota from Illinois found in the last 72 hours was to Watertown, at $171 round-trip. The most popular route is Chicago O'Hare Intl Airport (ORD) to Rapid City (RAP) and the cheapest round-trip airline ticket found on this route in the last 72 hours was $209.

  • What is the cheapest month to fly from Illinois to South Dakota?

    The cheapest month for flights from Illinois to South Dakota is January, when tickets cost $239 (return) on average. On the other hand, the most expensive months are April and July, when the average cost of round-trip tickets is $432 and $326 respectively.

  • How far in advance should I book a flight from Illinois to South Dakota?

    To get a below average price on the flight from Illinois to South Dakota, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 18 weeks before departure.

  • How long is the flight to South Dakota?

    An average nonstop flight from Illinois to South Dakota takes 6h 19m, covering a distance of 658 miles. The shortest route is Chicago O'Hare Intl Airport (ORD) to Sioux Falls (FSD) with an average flight time of 1h 52m.

  • What are the most popular destinations in South Dakota?

    Based on KAYAK flight searches, the most popular destination is Rapid City (57% of total searches to South Dakota). The next most popular destinations are Sioux Falls (41%) and Aberdeen (1%). Searches for flights to Pierre (0%) are also popular.

Top 4 airlines serving from Illinois to South Dakota

Need help choosing which airline to fly with from Illinois to South Dakota? 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.
8.7
Denver Air ConnectionOverall score based on 8 reviews
9.2Comfort
8.7Boarding
8.7Entertainment
8.7Food
9.7Crew
Airline reviews

The connecting flight came in 45 min late but everything else was great

8.0 ExcellentR, Jun 2024DEN - CVN
Read more Denver Air Connection reviews

The connecting flight came in 45 min late but everything else was great

Absolutely easy travels and no cost cutting by the airline.

Their snacks and hospitality was amazing. They offered full sized snacks. Im talking full sized water bottles, full sized snickers bars, gold fish, full sized canned sodas, what ever you wanted they took care of it for FREE. The crew was really nice and hospitable. I was honestly shocked

Delta is my preferred airline. I've traveled with them for years. On time in most cases, good communication, easy to use app. Most planes are pretty nice. I was on a CRJ 700/900 however, which was pretty badly aged inside and needed a refresh. No infotainment, unreliable wifi, best to download before boarding or bring a book. Food choices are really just snacks on this flight, nice variety but about what you'd expect. Great staff and prompt in departure and early arrival too. Overall quite satisfied.

Crew was friendly Love the entertainment in the seat head rest.

Delta flight was on time, seats were comfortable, and crew was nice.

This had nothing to do with Delta… The flights were on time and flawless. The service was excellent. We purchased seats in (aisle/middle) comfort plus since this was a cross country flight. Unfortunately, the woman seated at the window was 300+ pounds and, as might be expected, covered up about a third of the middle seat also. there was absolutely nothing that Delta could have done about that… I just don’t know what the answer should be. If you purchase a seat, you should should be able to use the entire seat and not just the portion that someone else is not sitting/oozing in. Disappointing…there should be something that could be done….I'm just not sure what solution could be.

Delayed take-off. Very small plane so very scary with lots of bumps during the flight. Would never fly Delta on short flights in small 80 seaters plane again! Felt relieved when landed.

The worst part was I was NOT allowed in the lounge even though I was holding a first class ticket and have a premium American Express card. I have flown Business or First Class with many airlines. Delta is the ONLY one who does not extend this courtesy to anyone except people who hold the very expensive American Express card. As a result, I won’t fly Delta if I have any other choice.

A little bumpy ride . No food was being provided due the the turbulence. That was ok it was a short flight to my standards.

Simply outstanding. Their new lounge for Delta One customers is a cut above the rest.

The Dekta Rep that checked us in was great. She's very personable, pleasant, and can tell she enjoys her job.

The plane was old with small storage areas that had problems closing/latching and not enough storage for everyone, and worn, damaged seats. Service was great but feel a little unsafe on such well used planes.

A bit rush for transit. Food and entertainment are not available

Smooth boarding process. Early departure, smooth flight, early arrival. The entertainment package has very good recent movie options. The flight crew were friendly and professional.

My flight was scheduled for about 6:05 departure. There were 11 gate changes from 4-7pm and the flight was 3 hours delayed due to operational issues. The plane taxied around the airport for about half an hour before stopping to be de-iced. It would have been nice if we were alerted of the plan to de-ice prior to the 30 minute drive around the airport. The flight attendant was friendly, which was the only redeeming thing about this flight. As a former flight attendant for United, I was extremely disappointed.

Delays took 2hours and thirty minutes making me miss my connecting flight and make me sit in the Chicago airport for 9 hours

Had a short delay once we boarded the aircraft in Chicago, but it was fixed in no time flat then we were on our way. The pilot was able to make up the time lost and we landed 5 minute later then schedualed . Great service

Our seats were all the way in back of the plane,

The seats on this flight were almost roomy enough to be the basic amount needed for human existence. I think my favorite part of this flight was it landed at an A gate, which was the most palatial part of Sea-Tac I've ever seen - a massive improvement from the S gates.

The seats on this flight were almost roomy enough to be the basic amount needed for human existence.

The flight attendants in First Class were mediocre at best. They did not take our tray away until we were about to land and only did so when I press the call button. The United person at the United Club was asked to get us our boarding pass since we missed the flight due in Chicago. She argued that we did not have seats on the flight given to us in Moline. Furthermore, she was adamant that we did not have a First Class ticket. After I spent much time with her trying to show we were correct, she reluctantly agreed. She was probably the most incompetent ticketing person I have ever met and I have traveled 3 million miles on United plus many additional miles with other carriers. United has definitely deteriorated in more than on way.

The plane was in Moline all night. Consequently, we assumed an on time departure at 8:15am. Unfortunately, and as is the normal case with United in Moline, we departed 2.5 hours late. When the crew came, it was discovered that there was very little heat in the plane. Seems this should have been checked hours before the crew arrived. Then when we boarded and the plane was to be de-iced, the United de-icing truck was not working! We awaited the American Airlines truck. All of this caused us to miss our connection in Chicago. My suggestion is never take United Airlines flight from Moline. We have been disappointed 80% of the time and have vowed to not take United again from Moline.

Wonderful crew and early arrival to our destination. It was so nice to have free wifi access and movies too. Thank you!

I have long legs, my foot was out in the aisle and when a flight attendant came walking by and I didn't notice, instead of saying "excuse me" or anything like that, she kicked my foot. Extremely rude

Excellent! The gate agents were kind enough to rebook me on an earlier flight saving me from a 6 hour layover. Even my luggage made it despite the fact that the connection was technically too narrow. The flight itself was very comfortable, roomy, and clean. Plenty of space for my carryon items with plugs to charge my phone. After a long international flight of 14 hours, this was an excellent way to end my travels!

Great experience. Flight boarded easily. Departed early. Smooth flight. Great arrival in DC--almost no taxing! Almost direct to gate from runway. Crew was terrific. Same cookies and beverages in main cabin. I did not use the entertainment system on this flight.

Most of the delay was due to weather which is not what was at issue here. One delay was due to a missing flashlight and in the end the flashlight was actually found on the plane. The entertainment system is very limited. Live TV options offer only a few channels that are not very appealing. Boarding and deplaning are always difficult. It just takes too much time to get on and off the plane. On the plus side, I missed my connecting flight, but was easily able to book a later flight from the app while enroute.

You were more on time than United. I'm so over united delays.

The meals were mediocre and the alcohol selection was poor. I enjoyed the selection of movies and other entertainment.

I chatted with the captain before the flight, and similarly during the welcome announcement, he warned of a turbulent flight that may impact the in-flight service. However, once at altitude, he announced that the weather changed and he immediately turned off the seatbelt sign. But it appeared the cabin crew had already decided to take off this flight. They remained seated and then just chatted in the galley. The flight was fully catered, but only first class received service.

My flight attendant was attentive! The elderly person next to me was flatulent and the flight attendant could see that I was in distress and brought me some face masks

My boarding pass wouldn't pull up in the app very easily and had to really dig through my email. That caused a delay in TSA..

Book cheap flights from Illinois to South Dakota

Recent round-trip flight deals

6/6Fri
nonstopAmerican Airlines
1h 48mORD-FSD
6/8Sun
nonstopAmerican Airlines
1h 49mFSD-ORD
$169
5/29Thu
1 stopDelta
6h 04mSTL-FSD
5/29Thu
1 stopDelta
3h 27mFSD-STL
$199
7/18Fri
nonstopAmerican Airlines
2h 23mORD-RAP
7/21Mon
nonstopAmerican Airlines
2h 17mRAP-ORD
$209
7/5Sat
1 stopDelta
3h 27mSTL-FSD
7/6Sun
1 stopDelta
4h 32mFSD-STL
$214
5/29Thu
nonstopUnited Airlines
2h 35mORD-RAP
6/5Thu
1 stopUnited Airlines
6h 06mRAP-ORD
$219
6/6Fri
nonstopAmerican Airlines
1h 49mORD-FSD
6/8Sun
1 stopAmerican Airlines
7h 43mFSD-ORD
$219
6/2Mon
1 stopFrontier
8h 58mORD-FSD
6/8Sun
1 stopFrontier
8h 01mFSD-ORD
$220
5/29Thu
1 stopUnited Airlines
5h 02mORD-RAP
6/5Thu
1 stopUnited Airlines
5h 30mRAP-ORD
$229
6/13Fri
1 stopDelta
6h 06mSTL-FSD
6/20Fri
1 stopDelta
3h 28mFSD-STL
$229
7/3Thu
1 stopFrontier
27h 48mMDW-FSD
7/6Sun
1 stopFrontier
5h 57mFSD-MDW
$332

Search by stops

Search by airline

Search by price

Recent one-way flight deals

5/29Thu
1 stopAmerican Airlines
7h 36mSTL-FSD
$100
5/29Thu
1 stopFrontier
8h 58mORD-FSD
$115
6/6Fri
1 stopFrontier
8h 58mORD-FSD
$116
9/9Tue
1 stopDelta
5h 20mMDW-RAP
$152
6/12Thu
1 stop
13h 34mORD-FSD
$167
6/29Sun
nonstopUnited Airlines
2h 41mORD-RAP
$177
6/12Thu
2 stops
24h 38mORD-FSD
$179
6/8Sun
1 stopUnited Airlines
5h 02mORD-RAP
$187
7/27Sun
1 stopDelta
5h 03mORD-RAP
$190
6/12Thu
2 stopsAllegiant Air
23h 04mMDW-FSD
$210

Search by stops

Search by airline

Search by price

Last minute flights from Illinois to South Dakota

Last minute flight, train and bus deals

5/1Thu
multi-stopDelta
5h 44mSTL-FSD
5/14Wed
multi-stopDelta
6h 04mFSD-STL
$264
5/2Fri
multi-stopDelta
5h 44mSTL-FSD
5/5Mon
multi-stopDelta
3h 59mFSD-STL
$289
5/3Sat
multi-stopAmerican Airlines
5h 36mSTL-RAP
5/5Mon
multi-stopAmerican Airlines
5h 10mRAP-STL
$339
5/2Fri
nonstopAmerican Airlines
1h 55mORD-FSD
5/7Wed
nonstopAmerican Airlines
1h 42mFSD-ORD
$354
5/2Fri
multi-stopAmerican Airlines
6h 48mORD-FSD
5/7Wed
nonstopAmerican Airlines
1h 42mFSD-ORD
$364
5/2Fri
multi-stopDelta
3h 58mORD-FSD
5/7Wed
multi-stopDelta
3h 24mFSD-ORD
$374
5/3Sat
multi-stopUnited Airlines
9h 33mSTL-RAP
5/5Mon
multi-stopUnited Airlines
7h 24mRAP-STL
$414
5/3Sat
multi-stopUnited Airlines
7h 33mSTL-RAP
5/5Mon
multi-stopUnited Airlines
9h 15mRAP-STL
$455
5/2Fri
multi-stopUnited Airlines
26h 01mORD-FSD
5/4Sun
nonstopUnited Airlines
1h 50mFSD-ORD
$561
5/2Fri
multi-stopUnited Airlines
5h 22mSTL-FSD
5/5Mon
multi-stopUnited Airlines
25h 57mFSD-STL
$576

Search by stops

Search by airline

Search by price

Everything you need to know for your flight to South Dakota

Cabin class types available on flights to Illinois

Cabin classes available on flights to Illinois. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.