$100 Find Cheap Flights from Illinois to South Dakota

1 adult
1 adult, Economy

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 20% 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

Good to know

Low seasonJanuary
High seasonJuly
Cheapest flight$100
Best time to beat the crowds with an average 3% drop in price.
Most popular time to fly and prices are also 5% lower on average.
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 Rapid City Airport (RAP), with an average flight price of $223.

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

    Based on KAYAK data, the cheapest day to fly to South Dakota is Wednesday where round-trip tickets can be as cheap as $309. On the other hand, the most expensive day to fly is Sunday, where round-trip prices are $384 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 $276 on average. Morning departures are around 28% 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 Sioux Falls, at $169 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 June, when the average cost of round-trip tickets is $386 and $334 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 20 weeks before departure.

  • How long is the flight to South Dakota?

    An average nonstop flight from Illinois to South Dakota takes 7h 29m, 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 46m.

  • What are the most popular destinations in South Dakota?

    Based on KAYAK flight searches, the most popular destination is Rapid City (77% of total searches to South Dakota). The next most popular destinations are Sioux Falls (22%) and Pierre (1%). Searches for flights to Aberdeen (0%) are also popular.

Reviews of the 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
8.7Boarding
8.7Entertainment
9.7Crew
8.7Food
9.2Comfort
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

I like for how they process during check in. It was very smoothly.

The flight was scheduled for 2:30 PM. Early in the morning we got a text message saying the flight was delayed and rescheduled for 3:00 PM. We got to the airport with that in mind. Then we got a message during check-in at the flight was rescheduled again for 2:30 PM. We almost missed our flight. In fact, our bags Were told that they would not make it. At the end, everything worked out. But it is very stressful.

Most aspects were good however if they assign boarding zones they ought to enforce them or why bother? My luggage from SAN-JFK-MAD was lost in NY so I without my main bag for two days upon arrival in Spain. They were helpful in tracking it and eventually delivered it to my hotel. The flub was because of a delay upon arrival in NYC. I had booked 2 1/2 hours between flights but we had to hold on the taxiway for an hour after landing while waiting for a clear gate which likely caused the baggage error.

Excellent check-in. Crew was good. Excellent communication from flight deck.

Great overall. There was a bit of turbulence so they could only serve water because too much turbulence for the carts. Was glad they prioritized safety though

Excellent flight, the planes were newer, they did a nice job with boarding, great service overall.

Great service. Flight was delayed while we sat on the runway for a couple of hours. Weather related. Staff made is very bearable. The steward servicing the first class cabin was exceptional. Thank you! 💗

5 hours of delay that could've been much shorter if Delta had taken the 1 hour delay they imposed on the flight before boarding to run any of the plane checks required for flight to find the hydraulic issue that required nearly 3 hours to fix. $24 of meal credit buys a sandwich and a soft drink. Poor communication within the terminal about what gate we'd be re-boarding from and when we'd be re-boarding.

Amazing flight! I have never noticed the uniforms of the attendants before in twenty years of flying except today when one female had the most amazing dress on. It was beautifully designed and showed she was in charge. I never dreamed I would google who designed Delta uniforms . The ultimate compliment is when another woman admires your outfit. . I hope your designer puts it on the market

It would be nice if was given wires ear buds. Overall was a good experience was able to sleep on the plane

Evidently, my seat had the only broken TV. I couldn’t plug it in, get it to come on, or watch anything, and of course, no one could fix it while we were on the plane. The service was good and the boarding was quick

It was fine, definitely older planes with no charging or anything. There’s no entertainment set up on board, but it is nice that they allow you to access the in flight entertainment from your phone without having to pay for the Wi-Fi and they do offer free texting.

I was charged for my daughters bag when I am supposed to receive two free checked bags with my United Explorer card.

The schedule to Moline changed 5 times. The gate changed 6 times. That is a pathetic way to run an airline. No wonder that no one in our company flies on United Express to or from Moline. Changes happen most of the time. I learned my lesson on this trip…never again!

Flight was great. Efficient boarding. Short flight. Early arrival. Friendly flight crew. The entertainment system did not work well. Could not access it until the aircraft reached 10K feet or more. Lots of glitches.

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

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

8/21Thu
nonstopAmerican Airlines
2h 08mORD-FSD
8/24Sun
nonstopAmerican Airlines
1h 46mFSD-ORD
$189
7/30Wed
nonstopAmerican Airlines
1h 58mORD-FSD
8/6Wed
nonstopAmerican Airlines
1h 46mFSD-ORD
$191
8/10Sun
nonstopUnited Airlines
2h 35mORD-RAP
8/15Fri
nonstopUnited Airlines
2h 24mRAP-ORD
$191
8/7Thu
nonstopUnited Airlines
2h 35mORD-RAP
8/13Wed
nonstopUnited Airlines
2h 22mRAP-ORD
$200
7/4Fri
1 stopFrontier
12h 52mORD-FSD
7/9Wed
1 stopFrontier
28h 22mFSD-ORD
$200
7/4Fri
1 stopFrontier
5h 57mMDW-FSD
7/9Wed
1 stopFrontier
25h 06mFSD-MDW
$200
7/26Sat
1 stopDelta
6h 09mORD-FSD
8/30Sat
1 stopDelta
3h 24mFSD-ORD
$209
7/26Sat
2 stopsDelta
9h 44mORD-FSD
8/30Sat
1 stopDelta
3h 24mFSD-ORD
$214
7/14Mon
2 stops
14h 11mORD-FSD
7/18Fri
2 stops
21h 05mFSD-ORD
$267
7/14Mon
2 stops
14h 11mORD-FSD
7/18Fri
1 stop
18h 06mFSD-ORD
$280

Search by stops

Search by airline

Search by price

Recent one-way flight deals

7/4Fri
1 stopDelta
5h 46mSTL-FSD
$100
6/27Fri
1 stopFrontier
5h 57mMDW-FSD
$100
7/22Tue
nonstopAmerican Airlines
2h 18mORD-RAP
$110
7/1Tue
1 stopUnited Airlines
5h 04mORD-RAP
$120
7/1Tue
1 stopUnited Airlines
5h 04mORD-RAP
$140
7/16Wed
2 stops
29h 33mORD-RAP
$147
7/4Fri
2 stops
9h 26mSTL-FSD
$156
7/11Fri
1 stopAmerican Airlines
6h 33mSTL-RAP
$175
7/18Fri
2 stopsAllegiant Air
30h 35mMDW-FSD
$181
6/27Fri
2 stopsAllegiant Air
30h 37mMDW-FSD
$361

Search by stops

Search by airline

Search by price

Last minute flights from Illinois to South Dakota

Last minute flight, train and bus deals

6/18Wed
multi-stopFrontier
11h 53mORD-FSD
6/19Thu
multi-stopFrontier
9h 02mFSD-ORD
$228
6/20Fri
multi-stopFrontier
5h 57mMDW-FSD
6/22Sun
multi-stopFrontier
20h 43mFSD-MDW
$248
6/20Fri
nonstopAmerican Airlines
1h 52mORD-FSD
9/20Sat
nonstopAmerican Airlines
1h 53mFSD-ORD
$271
6/20Fri
nonstopAmerican Airlines
1h 48mORD-FSD
9/20Sat
nonstopAmerican Airlines
1h 53mFSD-ORD
$272
6/20Fri
multi-stopDelta
3h 47mORD-FSD
9/20Sat
multi-stopDelta
3h 27mFSD-ORD
$289
6/20Fri
multi-stopDelta
6h 16mORD-FSD
9/20Sat
multi-stopDelta
6h 39mFSD-ORD
$294
6/20Fri
nonstopUnited Airlines
2h 34mORD-RAP
6/24Tue
nonstopUnited Airlines
2h 24mRAP-ORD
$409
6/19Thu
multi-stopUnited Airlines
6h 21mSTL-RAP
6/21Sat
multi-stopUnited Airlines
10h 26mRAP-STL
$414
6/20Fri
multi-stop
9h 23mSTL-FSD
6/22Sun
multi-stop
18h 15mFSD-STL
$502
6/19Thu
multi-stop
23h 10mORD-RAP
6/22Sun
multi-stop
33h 48mRAP-ORD
$625

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.