$130 Find Cheap Flights from Sioux Falls to Illinois - 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 Sioux Falls to Illinois departing on 9/28. 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

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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$249
Bloomington
Bloomington1 stop$359
St. Louis
St. Louis1 stop$242
Chicago
Chicagononstop$249
Bloomington
Bloomington1 stop$359
St. Louis
St. Louis1 stop$242

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

Wed, Jul 15 - Sun, Jul 19
Frontier Logo
8:08 pm - 7:23 pm
FSD
-
STL
23h 15m
1 stop
Frontier Logo
8:08 pm - 7:23 pm
STL
-
FSD
23h 15m
1 stop
$242Frontier
Fri, Sep 11 - Sun, Sep 13
American Airlines Logo
7:00 am - 9:10 am
FSD
-
ORD
2h 10mnonstop
American Airlines Logo
10:39 pm - 12:29 am
ORD
-
FSD
1h 50mnonstop
$249American Airlines
Fri, Sep 11 - Sun, Sep 13
Frontier Logo
7:31 pm - 9:35 pm
FSD
-
ORD
26h 04m
1 stop
Frontier Logo
10:40 pm - 6:36 pm
ORD
-
FSD
19h 56m
1 stop
$250Frontier
Thu, Jul 23 - Sun, Jul 26
American Airlines Logo
7:06 am - 9:05 am
FSD
-
ORD
1h 59mnonstop
American Airlines Logo
10:30 pm - 12:18 am
ORD
-
FSD
1h 48mnonstop
$251American Airlines
Thu, Jul 30 - Sat, Aug 1
American Airlines Logo
5:34 pm - 12:50 am
FSD
-
ORD
7h 16m
1 stop
American Airlines Logo
10:30 pm - 12:18 am
ORD
-
FSD
1h 48mnonstop
$259American Airlines
Fri, Sep 11 - Sun, Sep 13
Delta Logo
1:05 pm - 6:19 pm
FSD
-
MDW
5h 14m
1 stop
Delta Logo
9:59 am - 3:46 pm
MDW
-
FSD
5h 47m
1 stop
$269Delta
Tue, Aug 4 - Sat, Aug 15
Delta Logo
5:00 am - 8:30 am
FSD
-
ORD
3h 30m
1 stop
Delta Logo
6:00 am - 12:38 pm
ORD
-
FSD
6h 38m
1 stop
$269Delta
Wed, Jul 29 - Wed, Aug 5
United Airlines Logo
6:51 pm - 11:57 pm
FSD
-
STL
5h 06m
1 stop
United Airlines Logo
5:10 am - 10:23 am
STL
-
FSD
5h 13m
1 stop
$271United Airlines
Wed, Jul 29 - Wed, Aug 5
United Airlines Logo
5:05 pm - 11:57 pm
FSD
-
STL
6h 52m
1 stop
United Airlines Logo
5:10 am - 10:23 am
STL
-
FSD
5h 13m
1 stop
$280United Airlines
Fri, Jul 24 - Tue, Jul 28
Multiple Airlines Logo
8:08 pm - 7:23 pm
FSD
-
STL
23h 15m
1 stop
Multiple Airlines Logo
8:08 pm - 8:03 pm
STL
-
FSD
23h 55m
2 stops
$388Multiple 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.

How much is a round-trip flight from Sioux Falls to Illinois?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Sioux Falls to Illinois departing in September.

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 5 days was to Chicago, at $308 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 5 days was $308.

What is the cheapest time of day to fly to Illinois?

The average price for all round-trip flights from Sioux Falls to Illinois depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to Illinois is generally at night, when round-trip flights cost $383 on average. Morning departures are around 7% 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 $490.

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.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at $381 on average.

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 April, when tickets cost $151 (return) on average. On the other hand, the most expensive months are June and January, when the average cost of round-trip tickets is $245 and $189 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, Friday 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 Wednesday, with Monday 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 5 weeks before departure, which saves you about 27% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 11 weeks before departure.

Good to know

Low seasonNovember
Cheapest flight$130
Best time to beat the crowds but there is an average 3% increase in price.
Most popular time to fly and prices are also 2% lower on average.
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.

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 $357 one-way - $375 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.
7.8
DeltaOverall score based on 8453 reviews
7.8Entertainment
8.1Boarding
7.8Comfort
7.2Food
8.5Crew
Airline reviews

It was as good as it could be. Flying is not a pleasant experience these days.

8.0 ExcellentMark, Jun 2026
LAX - ORD
Read more Delta reviews

It was as good as it could be. Flying is not a pleasant experience these days.

There was an unruly family behind us that made the short flight miserable!!! The cabin crew did nothing to contain it.

Flight delay was frustrating, also you cannot checkin online without delta app, web browser check-in throw errors

Got on the plane and sat there for an hour before departure.

Very large passenger too space from my own seat. Arm board couldn’t be lowered because of his size. It wads very uncomfortable trip, as the flight was full couldn’t move anywhere having back pain because of the position in which I was the entire flight.

Cramped seating for me. Luckily it wasn’t a long flight

5 hour delay. They blamed the weather but it was the computer issues they had been dealing with for days.

I usually have a positive experience with Delta. Complimentary upgrades are always nice!

The captain was amazing and kept us informed throughout that there would be some rough air. The flight also got delayed but we were able to actually leave on time, which was great.

The staff did not do a good job of getting everyone boarded quickly, so we missed our take off window and had to sit on the tarmac for 20+ min waiting for our turn. The plan was old. Pockets on the back of seats were torn and tearing off. One of the attendants was rude-she would ask a question but he walking away before you finished answering so she kept getting our drink orders wrong.

1 flight cancelled Had to fly out of different city Flight at new departure city was delayed 3 hours causing us to miss connecting flights. By the time we did make it to Prague our luggage did not. Had to wait day and a half for luggage to be delivered. Customer service was not good. Agents did not arrive at gate until 5-10 minutes before boarding

Awful. Delayed flights, missed connection to Toronto. Hotel vouchers were for already booked hotels x3. Giant waste of my time

Boarding was great, and the crew were very friendly. The seats must have been a bit on the older side and you could feel some of the seat components through the padding. Also, the plugs did not work on the row's entertainment screen or charging ports. Checked bag was transferred for connecting flight, and we appreciated how early we had the connecting gate information.

Very easy ! Use the kiosk and bag drop and right to security within 10 min

Over 5 hour delay with minimal updates or ability to standby for alternative flights. During boarding and 1 hr+ wait for takeoff, seats were drenched w water from air conditioning condensation and always leftover crumbs on carpet and seats

Boarded early, left early, arrived 40 mins early! A win win for me!

These airplanes should be illegal. The seats are two tight, it is a safety issue. Wheelchair support was ridiculously slow. We almost missed our flight.

This flight is a quick way to get to Chicago, but a bit expensive.

O’hsre taxi and deboarding took 40 minutes. Needed 20 minutes extra time between connecting flights to avoid running through terminal.

Why wasn't this flight departure scheduled eith another crew so that it could leave on time? When we arrived in Denver we had so little time between flights we had run to the connecting flight. We should received some credit for the inconvenience.

The planes can use an actual cleaning. The armrest and seats do not appear to be cleaned on this one and most other planes.

Flight was delayed…once landed at ORD, no gates were available so made us wait for 56 minutes after we landed to let us out of the aircraft!

The flight de-boarded after being informed of a 3 hour delay. The gate agent said we could go to lounge. The flight ended up boarding 20 minutes later and I missed it.

I love the e fact that the staff communicated swiftly when my flight was delayed and gate number changed

We had a mechanical delay which made us 90 minutes late (9:30 PM) then land and put into the penalty box because a plane was in our gate? What the hell! We should get priority.Damn American.

The seats were extremely cramped, with very little legroom or personal space. There was no room left in the overhead bins for a backpack, and the space under the seat in front was so limited that I could barely fit my bag underneath. Overall, the seating arrangement felt very uncomfortable and overcrowded.

weather delay of almost 2 hours then we landed and our gate wasn't available so we waited another 30 min

Delayed flight more than I hour. When boarding we spent some additional time on the plane before takeoff ....

I had a carry on and a personal bag. I put my personal item under my seat and on way to the seat I put my bag up. I usually close my eyes and rest as I was on call for last 36 hours. I heard very loud announcements that someone needs to identify their bag. Pretty sure it was not mine until the hostess pointed out my jacket details attached to the bag. I asked why she got my bag out. I got berated and did not want to create a scene. But this person needs to be talked to.

Other than being delayed 5.5 hours and having to get a hotel because I missed my connecting flight, it was an okay flight. No in-flight Wi-Fi or entertainment.

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

Information on your arrival and departure airports