$105 Find Cheap Flights from Illinois to South Dakota - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Illinois to South Dakota departing on 10/14. 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.
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Low season

January

Cheapest flight

$105
Best time to beat the crowds with an average 4% drop in price.
Most popular time to fly with an average 7% increase in price.
Flight from Chicago O'Hare Airport 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 airlines fly most frequently to South Dakota?

    Illinois and South Dakota are connected by different airlines. The airlines that fly that route the most regularly are United Airlines (53 flights per week), Air New Zealand (39 flights per week), and American Airlines (37 flights per week).

  • How many airports are there in South Dakota?

    There are 5 airports in South Dakota. The busiest airport is Sioux Falls Joe Foss Field Airport (FSD), with 63% of all flights arriving there.

  • 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 $313.

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

    Based on KAYAK data, the cheapest day to fly to South Dakota is Saturday 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 $434 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 $269 on average. Morning departures are around 36% 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 $371.

  • What is the cheapest flight to South Dakota?

    The cheapest ticket to South Dakota from Illinois found in the last 5 days was to Watertown, at $210 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 5 days was $260.

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

    The cheapest month for flights from Illinois to South Dakota is April, when tickets cost $250 (return) on average. On the other hand, the most expensive months are November and January, when the average cost of round-trip tickets is $394 and $353 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 6 weeks before departure, which saves you about 30% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 24 weeks before departure.

  • How many cities have direct flights to South Dakota?

    From Illinois, there are direct flights to South Dakota from 1 city. This city is Chicago and there are 209 direct flights each week.

  • How many direct flights to South Dakota are there each day?

    There are around 30 direct flights from within Illinois to South Dakota every day. Most flights (51%) depart in the morning.

  • How many direct flights to South Dakota are there each week?

    Each week there are around 209 direct flights from within Illinois to South Dakota. The most common day for departures is Friday, with 17% of flights taking off on this day.

  • How long is the flight to South Dakota?

    An average nonstop flight from Illinois to South Dakota takes 6h 35m, 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 50m.

  • How many long-haul flights are there to South Dakota each week?

    There are not any long-haul (6-12 hour flight duration) or medium-haul (3-6 hour flight duration) flights to South Dakota. Instead, there are 209 short-haul flights (up to 3 hour flight duration), with the most arriving from Chicago.

  • What are the most popular destinations in South Dakota?

    Based on KAYAK flight searches, the most popular destination is Rapid City (72% of total searches to South Dakota). The next most popular destinations are Sioux Falls (26%) and Pierre (2%). Searches for flights to Aberdeen (1%) are also popular.

Reviews of the top 3 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.
7.8
DeltaOverall score based on 8477 reviews
8.1Boarding
7.8Comfort
7.8Entertainment
8.5Crew
7.2Food
Airline reviews

The crew was very inconsiderate and rude. My flight was scheduled to depart at 6:00am. I received a call from the crew at 5:40am, asking if I was going to make the flight because I was the only one that hasn't boarded yet and boarding ends at 5:50am. I let them know that I will be at the gate in a few minutes, before the 5:50am cutoff. When I arrived at the gate at 5:45am the gate was closed. Departing early on last minute notice without having all passengers on board is inconsiderate and unprofessional.

2.0 MediocreJean, Jun 2026
MDW - ATL
Read more Delta reviews

The crew was very inconsiderate and rude. My flight was scheduled to depart at 6:00am. I received a call from the crew at 5:40am, asking if I was going to make the flight because I was the only one that hasn't boarded yet and boarding ends at 5:50am. I let them know that I will be at the gate in a few minutes, before the 5:50am cutoff. When I arrived at the gate at 5:45am the gate was closed. Departing early on last minute notice without having all passengers on board is inconsiderate and unprofessional.

Very easy to use and convenient, you can perform any action within the same portal

Okay considering we had weather delays which the Pilot notified us of immediately!

The boarding was organized and informative but the plane was tight meaning that you were sitting on one another and extremely uncomfortable. It’s disappointing that can’t have common seating comfort on the plane.

Everything could have benn better. Short fly, no food, no entertainment and no wifi.

Stop changing gates. Stop cancelling flights Stop moving my seat.

The staff was frielndly. The plane was terrible, it was too small and should be decommissioned. There were no back seat screens at all. The only beverages we had a choice from was coffee, tea or water. The only bathroom in the back was behind the flight attendant's jump seat and wasn't working. And I literally felt like I was sitting on top of the guy next to me. It was terribly hot in the plane and we had to sit on the tarmac in Chicago for 1/2 hour due to congestion in Mpls. Wouldn't they have know that before they even boarded us so that we could have sat in comfort in the terminal?

This was one of the worst flights I’ve been on in years. I upgraded to comfort and had such an uncomfortable experience. The person next to me was oversized - which I understand - however, they took up their space and mine. I could only use about 50% of my seat space to not be physically touching this person the entire flight and there was no spatial awareness. I also could not use the seat outlet because their body was obstructing it. It was very inconvenient. Their body kept touching me repeatedly during the flight and I felt very uncomfortable. To pay more for an upgraded space and then not even being able to use it was highly disappointing.

It was very cold because the air conditioner was on high power, and my son got sick.

The boarding process was terrible especially with an indirect flight Chicago to Seattle to San Diego was terrible talking about we overbooked a flight idk if I’d take this airline ever again we got off our flight from Chicago to Seattle and we traveled for business and they told us our connecting flight was over booked and their was no seats asking people to take a delayed next flight and they don’t tell anyone coughing to wear masks seats 30A-B were terrible during the flight no one wants to sit next to people coughing all around I don’t want to be sick traveling for work or get sick anytime it’s very upsetting the staff doesn’t take this stuff serious to tell them to wear masks when they see people coughing and sneezing

It was extremely hot in the cabin the entire flight, vent air was worn

Have not had a flight out or returning to Norfolk that has not required maintenance, and a gate delay. Properly staff the crew so maintenance can be performed without last minute emergencies on each flight and there is enough staff to have gates prepared for inbound flights. Staff to ensure the safety and on time service vs. profit.

My original flight was cancelled and that affected my trip and my plans and I got no compensation and customer service was hard to reach as well

The flight was delayed by a hour and I wish they had communicated it sooner. No issues on the plane, it did take a while for food to come.

Know that the movies that you are going to be offered are the oldest be rated movies they could possibly get. They may have one or two new movies that they keep advertising but when you’re flying 15 hours, there is nothing to see past the first new movie.

Great experience. Boarding was fast, staff were very nice and funny, everything at the seat worked well.

Horrible! Several delays and then was cancelled! I spent over 24 hours in the airport and was unable to get a hotel or food voucher.

Boarded early; and arrived home 40 mins early. After a long flight, it’s nice to be back home early. These flights have no amenities; no snacks. So need to bring your own

A long delay. Don't travel late in the day.

Super friendly with lots of drink options an entertainment. Friendly crew.

Long delays to board due to mechanical issues with plane.

Flight was delayed, boarded, sat at the gate for more than 30 minutes, left the gate then waited on the pad for another 30 to 60 minutes then returned to the gate, deboarded and was cancelled... alternative flight was not booked automatically. Waited in line for 30 minutes but fortunately an alternate flight to a different destination was found ... no thanks to the travel agent used by kayak

The flight from Milwaukee to Dallas was great the staff absolutely amazing. After that EVERYTHING WENT DOWN HILL!!! ABSOLUTELY HORRIBLE!!! WILL NOT FLY THIS AIRLINE AGAIN

I was very unhappy with the lack of communication from the cockpit. It took close to a half an hour before we took off after the doors were closed, and we got no announcements as to progress. It would be nice to get some acknowledgement of the situation and updates as to when we are taking off.

The seat was not even cleaned. It has full of cookie crums probably from last flight's passenger. Its basic expectation that, seats are clean.

Very turbulent flight, no drinks, very little service, unorganized boarding, gate changed multiple times

The flight was delayed significantly. Communication during the flight was abrupt and caused some panic as we were navigating turbulence. It was also too loud and every announcement felt startling. The flight attendants did not offer any assurances and I felt unsettled most of the flight. The seats, floor and tray table was very dirty. The seat next to me was broken and the passenger sitting there was very uncomfortable. He had a spring in his back and his seat made terrible squeaking noises through the flight.

The flight attendants were very friendly, efficient, and helpful. The plane was ahead of schedule, and it all went very smoothly. Thank you.

I have a gluten allergy so did have any food

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

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.