$86 Find Cheap Flights from Sioux Falls to Illinois

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 2/19. 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

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

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Sioux Falls to Illinois, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Sioux Falls to Illinois, as well as popular online travel agencies
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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
Chicago1 stop$171
Bloomington
Bloomington1 stop$696
St. Louis
St. Louis1 stop$249
Chicago
Chicago1 stop$171
Bloomington
Bloomington1 stop$696
St. Louis
St. Louis1 stop$249

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

Thu, Feb 12 - Thu, Feb 19
Frontier Logo
2:16 pm - 11:14 pm
FSD
-
ORD
8h 58m
1 stop
Frontier Logo
4:16 pm - 12:56 pm
ORD
-
FSD
20h 40m
1 stop
$171Frontier
Thu, Feb 19 - Sat, Feb 21
United Airlines Logo
6:45 pm - 8:35 pm
FSD
-
ORD
1h 50mnonstop
United Airlines Logo
8:45 am - 10:46 am
ORD
-
FSD
2h 01mnonstop
$189United Airlines
Tue, Jun 2 - Sat, Jun 6
United Airlines Logo
7:45 am - 9:33 am
FSD
-
ORD
1h 48mnonstop
United Airlines Logo
7:57 pm - 9:47 pm
ORD
-
FSD
1h 50mnonstop
$197United Airlines
Sat, Jan 31 - Mon, Feb 9
United Airlines Logo
7:30 am - 9:32 am
FSD
-
ORD
2h 02mnonstop
United Airlines Logo
7:58 pm - 9:50 pm
ORD
-
FSD
1h 52mnonstop
$204United Airlines
Wed, Mar 4 - Sun, Mar 8
Delta Logo
8:05 am - 1:05 pm
FSD
-
MDW
5h 00m
1 stop
Delta Logo
7:20 pm - 10:59 pm
MDW
-
FSD
3h 39m
1 stop
$209Delta
Sat, Feb 7 - Mon, Feb 9
Delta Logo
1:02 pm - 5:55 pm
FSD
-
ORD
4h 53m
1 stop
Delta Logo
6:45 pm - 11:04 pm
ORD
-
FSD
4h 19m
1 stop
$209Delta
Thu, Feb 12 - Thu, Feb 19
Frontier Logo
2:16 pm - 11:14 pm
FSD
-
ORD
8h 58m
1 stop
Frontier Logo
4:42 pm - 12:56 pm
ORD
-
FSD
20h 14m
2 stops
$211Frontier
Thu, Jan 29 - Sun, Feb 1
American Airlines Logo
6:15 pm - 8:13 pm
FSD
-
ORD
1h 58mnonstop
American Airlines Logo
3:53 pm - 5:45 pm
ORD
-
FSD
1h 52mnonstop
$219American Airlines
Sat, Mar 14 - Fri, Mar 20
American Airlines Logo
6:45 am - 7:30 pm
FSD
-
STL
12h 45m
2 stops
American Airlines Logo
6:00 am - 11:38 am
STL
-
FSD
5h 38m
1 stop
$627American Airlines
Wed, Mar 18 - Mon, Mar 23
Multiple Airlines Logo
3:04 pm - 12:15 pm
FSD
-
STL
21h 11m
1 stop
Multiple Airlines Logo
8:12 pm - 12:44 pm
STL
-
FSD
40h 32m
2 stops
$659Multiple 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.

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 72 hours was to Chicago, at $249 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 72 hours was $249.

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.

No, with an average price for the route of $249, prices are generally cheapest when you fly direct.

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 September, when tickets cost $246 (return) on average. On the other hand, the most expensive months are March and November, when the average cost of round-trip tickets is $319 and $319 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, Saturday 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 3 weeks before departure, which saves you about 35% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 18 weeks before departure.

Good to know

Low seasonNovember
Cheapest flight$86
Best time to beat the crowds but there is an average 16% increase in price.
Most popular time to fly and prices are also 7% 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.

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

    The cheapest time of day to fly to Illinois is generally in the afternoon, when round-trip flights cost $398 on average. Morning departures are around 9% 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 $495.

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 $289 one-way - $310 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.
7.9
DeltaOverall score based on 8065 reviews
7.9Comfort
8.5Crew
7.2Food
8.1Boarding
7.8Entertainment
Airline reviews

No in flight service, no explanation - FC got service, C+ did not, unsure about Economy. No turbulence to speak of, so I guess another way to cut cost, or promote health and well being of Delta employees? Also, boarding in MEM combined zones, and with overhead space already full on both flights after Zone 2/ Diamond, presents a huge challenge to find a space for a bag. Delta, other than point A to B, is no longer reasonable to fly - very poor experiences, not even taking into account the chastising at the gate and rude crews, across the board.

4.0 OkayUros, Jan 2026
MEM - ATL
Read more Delta reviews

No in flight service, no explanation - FC got service, C+ did not, unsure about Economy. No turbulence to speak of, so I guess another way to cut cost, or promote health and well being of Delta employees? Also, boarding in MEM combined zones, and with overhead space already full on both flights after Zone 2/ Diamond, presents a huge challenge to find a space for a bag. Delta, other than point A to B, is no longer reasonable to fly - very poor experiences, not even taking into account the chastising at the gate and rude crews, across the board.

It would have been better if the flight wasn't delayed by 2.5 hours

Delta’s staff is unmatched. From the gate agents, to the pilots, to the flight attendants… all top of the industry.

Delta flight Delay for ,more that two hours i.e original flight was 6.30 PM and it starts at 8.45 PM, When we connect Delta team for meal vouchers as it is late arrival in designation,But we did not get it as per delta policy , which is not good for mid night arrival,

Inexperienced boarding crew allowed too many bags on to a full flight and delayed takeoff causing a missed connection and unplanned overnight stay. There was a hotel at the airport but Delta would not pay for it offering only to shuttle me to an area hotel. Never even offerred so much as an apology by anyone working for Delta.

Staff was great! Kind and cordial! Middle seat row 28 seat B has a hump in it. Trays were getting stuck when putting down and up. Good flight

Departure was delayed resulting in me missing my connection. Delta did not autimatically find me another flight.

The seats weren’t reclining even though it wasn’t as exit seat

It was good because we traveled without luggage, carry on only.

I usually get upgraded so my experience is usually amazing. I did not get upgraded this time - which was fine - but the wifi had issues, the monitors were going in & out, & (though not Delta's fault) one of the gentlemen next to me desperately needed a shower.

Perfect flight. Smooth flight. Arrived 20 minutes early at destination. Excellent service.

The flights were on time which was great give. It was holiday travel season and there’d been some weather issues. The only complaint and this is every time with United is the terrible seat design. The head rest is not built for comfort and having my neck bent forward for a cross country trip reminded me while I try not to take United flights as a rule.

Everything was absolutely wonderful from check in to baggage claim. Staff was very professional and sweet. Will definitely recommend United to family and friends.

They did the one thing that really matters - got to Chicago early.

The flight was on time. I generally don’t drink or eat on short flights and the seats were good and the flight attendants were friendly. That’s all I expect

It was nice to have gotten up upgraded to first class with a meal on a three hour flight

Very bad! They kept delaying my flight and wouldn’t do anything about it

Door to door, the crew and staff were amazing. It was a stressful travel day with delays, but they were focused on customers and doing what they could to get us to our destinations.

Flight was delayed only slightly before takeoff due to traffic control. However, the flight arrived early to ORD. Good flight. United has been very reliable for me.

Another delayed flight. When the delays exceed the duration of the flight, it’s a problem.

Little warm on the plane and delayed for an hour

So excited very proud first of all I wanna thank kayak all updates very professional and fast alart And amazing cabin crew so nice to me they deserve big salute

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.

Awful. They won’t help me with anything. I booked on American but they abdicated to Iberia. The ticket was overpriced. Everything negative

I enjoyed the extra leg room compared to other airlines. The first stewards made my daughter’s birthday special by giving her an extra snack. Then the last one coming home from Chicago to Appleton made our night really enjoyable Thanks for making our trip enjoyable

It was good..clean, comfy seat. Friendly warm welcoming crew. Was able to check my cabin luggage at the gate which I was able to pickup in a decent time from baggage claim. The app gave all updates from delays to baggage claim info. Overall smooth flight.

It was a typical flight. We had a delay which seems to be the normality now. And we had no in flight service due to conditions.

After we landed we sat on the tarmac for 1.5 hours waiting to get to our gate. Ridiculous.

Terrible. Flight delayed for more than 8 hours with only a $12 meal voucher provided for the inconvenience. The airplane did not have breaks on arrival yet they still made us go through the motions and board on time knowing we could not take off then sit for 40+ minutes before having to get of the time. A complete waste of my time. I cannot believe they can stay business with these shenanigans. I’ll avoid this company like the plague moving forward as the lack of accountability is disgraceful.

This was the best 2 flights I have had with American out of SGF. Great crew both flights.

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

Information on your arrival and departure airports