$107 Find Cheap Flights from Illinois to South Dakota

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Low seasonFebruary
Cheapest flight$107
Best time to beat the crowds with an average 6% drop in price.
Most popular time to fly and prices are also 3% lower on average.
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 (32 flights per week), American Airlines (26 flights per week), and Alaska Airlines (24 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 66% 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 Sioux Falls Joe Foss Field Airport (FSD), with an average flight price of $293.

  • 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 Monday, where round-trip prices are $431 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 33% more expensive than evening flights, on average. The most expensive time of day to fly to South Dakota is generally in the morning, which is peak travel time and where the average cost of a ticket is $366.

  • 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 $189 round-trip. The most popular route is Chicago O'Hare Intl Airport (ORD) to Sioux Falls (FSD) and the cheapest round-trip airline ticket found on this route in the last 72 hours was $189.

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

    The cheapest month for flights from Illinois to South Dakota is March, when tickets cost $223 (return) on average. On the other hand, the most expensive months are April and November, when the average cost of round-trip tickets is $386 and $368 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 3 weeks before departure, which saves you about 16% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 20 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 147 direct flights each week.

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

    There are around 21 direct flights from within Illinois to South Dakota every day. Most flights (38%) depart in the morning.

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

    Each week there are around 147 direct flights from within Illinois to South Dakota. The most common day for departures is Monday, 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 7h 46m, 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 147 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 (56% of total searches to South Dakota). The next most popular destinations are Sioux Falls (36%) and Aberdeen (6%). Searches for flights to Pierre (1%) 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 20 reviews
8.1Entertainment
8.9Comfort
8.4Food
9.4Crew
8.7Boarding
Airline reviews

Denver air is great flight times and connections a little rough

8.0 ExcellentJane, Nov 2025
ORD - DBQ
Read more Denver Air Connection reviews

Denver air is great flight times and connections a little rough

Communication with delays. Failed to make a connection I ng flight in Chicago.

Excellent, from check Iin to arrival. I was apprehensive about flying a small plane between Ironwood and Chicago, but the flight and service was great. I noticed, after boarding , that my cell phone had little battery left. The flight attendant kindly lent me a charging device to keep me connected with my contact in Chicago upon landing. I will always remember that kindness.

Great snacks and friendly people for check in at Pierre SD!

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

Flight was delayed several times. At one point, they "pulled back" 15 minutes from the delayed boarding and sent a text saying we would board sooner than previously advised. The flight then was delayed again. And when we boarded, there was an unspecified technical issue which had us waiting in the plane for about an hour.

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!

I understand weather is an issue, but making us chase our plane down at five scheduled gates across three terminals in an airport the size of O'Hare was unfair. They'd have probably been better off to leave gates as TBD until the inbound plane is in final approach instead of running us all over the place. Also, props to the consistently-unprepared ground crew in Richmond for once again leaving my lane parked short of the gate because they couldn't have a crew in place on time with 2 hours notice...

cabin crew was OK, food was OK, the trip from the US to Munich was actually pretty bad comfort wise. Noisy aircraft, lights never dimmed even in Business class (night flight) barely sufficient amenities for the price. I have millions of miles with United but TBH American is gaining ground and Delta has always been marginally better then United although on paper United has more longes and cheaper upgrades.

Essy to get on. The hostess gave very little pop, the plane was late getting in, and we are still waiting for our bags. This sucks. :/

Great flight. On time boarding. Smooth flight and on time arrival at EWR. The flight crew was marvelous and there was a great selection of movies on the entertainment system. Our bags were at the carousel before we got there. Another excellent flight from United.

I liked the snacks and the flight attendants were friendly.

After a delay at the gate, C3, at Ohare on Sunday, I left my Blk ski coat on the bench at the gate, lost! Please review my lob claim, thx.

Very thoughtful flight attendant offered me water immediately since I had run to make my connection.

Always wish for more healthy, gluten free options. We have to bring our own.

Having a long layover, I was very appreciative of the ability to stand by for an earlier flight. Other airlines like Delta have refused this to me in the past, just to be mean (because my ticket class wasn't high enough). United went out of their way to help me get to my destination early, which I really appreciated given that it was the third leg of a 24+ hour journey for me.

Other than a way way too cold cabinets for the entire flight, all was great

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.

The boarding by groups is pointless. The first two groups worked fine, but almost Noone boarded in goups three thru five leaving the vast majority boarding when group six was called. It defeated the purpose of spreading out the crowd.

I have a gluten allergy so did have any food

We loved the steward on the plane. He made the night enjoyable

The plane was late, when we did board the plane was as cold as a freezer. I was freezing the entire flight, no blankets. Lost miserable flight I’ve ever had.

3 hour weather delay followed by 1 hour (and counting) maintenance delay. UGH!

After we'd boarded , they canceled the flight. The crew didn't even know , we just all received text messages. Then after they deplaned us , AA was just like "too bad, go F your self, we sure ain't gonna help you"

After a two hour delay, my flight was CANCELLED! No pilot available. Such BS.

Amazing food, great staff, with one noticable detail missing ...but no seat entertainment in any of aircraft ...I am not a fan

I wish American Airlines would change the airline industry by loading the plane back to front instead of front to back. Planes would board so much more smoothly and quickly.

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.