Find cheap flights from Sioux Falls to Illinois

Find cheap flights from Sioux Falls to Illinois

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

Round-trip
Economy
Sioux Falls (FSD)
Illinois
Mon 5/10
Mon 5/17
Any month
Compare vs. KAYAK |

Good to know

Low season

JulyBest time to beat the crowds with an average 3% drop in price.

High season

SeptemberMost popular time to fly with an average 6% increase in price.

Average price round-trip

$465(avg. price over the last 2 weeks)

Good deal round-trip

$294or less

Good deal one-way

$179or less

Top tips for finding cheap flights to Illinois

  • Looking for a cheap flight? 25% of our users found tickets from Sioux Falls to Illinois for the following prices or less: to Chicago $103 one-way - $328 round-trip
  • Book at least 1 week before departure in order to get a below-average price.
  • High season is considered to be November and December. The cheapest month to fly to Illinois is August.
  • Morning departure is around 37% more expensive than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

FAQs - booking Illinois flights

Which airlines have a flexible cancellation policy for flights from Sioux Falls to Illinois due to COVID-19?

Which airlines apply social distancing measures on flights from Sioux Falls to Illinois due to COVID-19?

How long is the flight to Illinois from Sioux Falls?

What is the cheapest flight to Illinois from Sioux Falls?

Which airlines fly to Illinois?

Are there Illinois travel restrictions currently due to Coronavirus?

How does KAYAK find such low prices on flights 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?

What is the Hacker Fare option on flights to Illinois?

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight to Illinois?

Top 5 airlines serving Sioux Falls Joe Foss Field to Illinois

Scores according to KAYAK customer reviews

7.9
Delta
Overall score based on 29,235 reviews
8.1
Boarding
7.8
Comfort
8.5
Crew
7.8
Entertainment
7.5
Food
Airline reviews

Pros: "Same crew and great experiments again"
Cons: "Nothing"

Pros: "Kosher snacks! Thank you! Very safe and controlled Covid procedures. Made me feel safe."

Pros: "Very controlled and safe Covid procedures. Outlets and screens at every seat."

Pros: "Felt very clean and so glad they are not selling every seat"

Pros: "It was all good glad the last leg of the trip was pleasant."

Pros: "Airplane accelerated from stand-by directly to runway without preparation stop. Awesome!"

Cons: "Small plane, feels cramped"

Cons: "The unfortunate delay prevented me from attending my grandmother’s wake. Fewer delays would be helpful."

Pros: "Crew was friendly"
Cons: "The boarding process was rough and haphazard"

Pros: "The crew did their best to deal with delay."
Cons: "There was an absolutely awful job done by both Delta and Kayak of informing us if additional delays, new gate assignments, when the plane would be reboarded. Also, people were quite angry that the plane had to be cleaned between the time we got off and the time we reboarded. Just get us home."

Pros: "Super crew. Reasonably good food. Liked how safety conscious crew was."
Cons: "Nothing. Great job everyone"

Cons: "No sandwiches for sale just snack boxes"

Pros: "Taco"
Cons: "Taco"

Pros: "It was ok"
Cons: "Seat the family together"

Cons: "Taxied at ORD for 45 minutes waiting for a gate to vacate."

Pros: "The crew really kept us updated on the many delays."
Cons: "There were SO many delays and they kept changing. At one point we got on and off the plane."

Pros: "Flight left on time"
Cons: "Gate crew had trouble identyfing boarding pass on their computer. Difficulty getting on plane"

Pros: "Amazing crew and clean cabin."

Pros: "I loved the flight attendants and the desk staff everyone was so friendly and made me want to travel delta again."
Cons: "Delta doesn’t offer military spouses free checked bags and I found this out at the airport. It was disheartening, but at least it’s Delta and not the airline that is supposed to represent America."

Pros: "On time/ early arrival!"
Cons: "Most bring on 2 large carry ons slowing down boarding an de- planeing."

Pros: "They were very helpful. I hurt my leg and am on crutches and they were extremely helpful to get me to my next gate in Minneapolis and to get me to baggage claim in Philadelphia."

Cons: "Plane journey awful. Speaker had a loud buzzing noise all the time so never heard a word bad landing. Rattling plane Very cold."

Pros: "Clean plane, the seat felt roomy. Smooth ride and the captain communicated clearly."
Cons: "It felt super hot and I wish there was food included in such a long flight."

Pros: "Quick flight"
Cons: "Flight attendant spoke like a robot. Could not understand her."

Pros: "On time"
Cons: "Small aircraft"

Pros: "Staff, service, options"

Cons: "Over an hour delay before boarding due to supposedly bad weather. Because flight was overbooked they were offering $400 gift card to change to standby on another flight. If you didn’t make that flight (evening), you’d be confirmed on a flight the following morning with one stop in Detroit (we booked a nonstop to Chicago). Uh, no thanks. Then to top it off, we’ve landed and been told that it will be at least an hour before we can deplane due to no availability at the gate (it’s 1145 pm right now). All this plus their new policy of not allowing us to select our seats because we bought the cheapest tickets. Really Delta? You go ahead and cater to the rich and I’ll choose to fly with another airline."

Pros: "Crew friendly"
Cons: "Middle seat with no option for me to move"

Pros: "Movie"
Cons: "Break downs again... At least this time they found another plane."

Pros: "Flight attendants were pleasant."

Pros: "Friendly service, comfortable seat, on time, no issues."

Cons: "Everything"

Pros: "The crew was great"
Cons: "The flight was 4 hours delayed"

Pros: "I flew on a basic economy fare (I understand the restrictions) and was seated in Economy Comfort +, so that was appreciated."
Cons: "I could see on the Fly Delta app that I had been placed in seat 10B, but neither the app nor my boarding pass gave me a group to board with, so I assumed that I needed to board with group 3, which necessitated gate-checking my rollerboard bag. Only when I approached the gate to board did I notice on the info screen that I had been "upgraded" to Comfort + and granted boarding with the Sky Priority group. I wish this had been clearer so I could have avoided waiting to board and gate-checking my bag. Minor inconvenience but room for improvement on Delta's part."

Pros: "This was not my original transfer flight but everyone was much nicer and helpful than serious and being rude. Love Delta, I did not flight United because I wouldn’t have met my United flight once landing in ATL. The Young African American woman who was at the gate was amazing and so reassuring that I would make my flight to Chicago. Would book Delta, just because of how nice she was to me."

Pros: "Flight was on time. Boarded quickly with no fuss."

Pros: "Flt on time, very nice and friendly gate agent and flight attendant"

Cons: "Too tight and seats not comfortable."

Cons: "Delayed"

Pros: "The Delta people were solicitous, efficient and brilliant the whole way through. We had not a bit of trouble. Our first class seats were comfortable, but with the supplied blanket, pillow and poor air conditioning it was a hot flight. The cabin personnel were wonderful as per usual, and my tasty gin and tonic soothed any discontent. I wish I could fly this way all the time!"
Cons: "The private contractor handling wheelchair assistance was terrible. A Delta employee theorized that they do not pay enough to attract and retain personnel. Our pre-arranged chair was not there, multiple calls by our Delta assistant finally got us a ride to the chair holding area, but after about 45 minutes we gave up and shuffled off to the security area on foot. Thank goodness my hubby is mobile enough for that to have been an option. When we abandoned our wait we were still 4th in line for an attendant to push the chair. If Delta has any responsibility in this it would be in the retention and compensation for the private contractor."

Cons: "The delta studio didn't work with Android 8"

Pros: "Airline stewards were very friendly and pleasant."
Cons: "We booked with Delta, but were put on Air France. Even though we had our boarding passes in hand we had to wait in long, slow line for baggage tags because they would not print from kiosk. There was minimal Air France staff on duty serving thousands of passengers during busy season (July). While the lines grew larger, the staff was reduced from 4 to 2. Another long, slow line for customs, another long slow line for security=Charles De Gaulle airport was awful. We arrived at the airport 4 hours before our departure time and got to our boarding gate with no time to spare."

Cons: "Very uncomfortable, seats did not recline and seats way too close together."

Pros: "Entertainment options weren't bad. Most of the crew was polite other than one flight attendant who seemed ambivalent and unhappy to be there."
Cons: "Three hour+ flight and just one tiny bag of pretzels? And no lemon or lime wedges on the beverage cart? Plus, I have to pay extra for one checked bag. I will only fly Delta if I have to in the future. Subpar airline."

Pros: "What I liked: Sky Priority privilege came with separate luggage check-in queues and early boarding"
Cons: "What I disliked: Seats were too small No beverages or snacks offered No USB or power outlets available Three different groups board before Delta Comfort (e.g. those needing more time, travelers with children, first/business class) Didn't see the value compared to a less expensive main cabin ticket"

Pros: "I was notified about the delay via text before I left for the airport, which was nice. I would not have checked my email."
Cons: "Delayed for over 2 hours. I have never flown Delta before this flight and it wasn't a great representation. The flight attendants were nice but I was in a seat near the engine and it was making really weird noises. I fly almost every two weeks, so I'm used to engine noises but this was one of the loudest/most rickety sounding flights I have ever been on.. and I have flown Spirit a few times. It just didn't feel safe. Landing scared me a little too as I have landed in O'Hare countless times and have never flown so low to the highway upon entry. It felt like we were only a couple hundred feet above the cars."

Cons: "Unnecessary flight cancellation. I had friends taking the same flight at the same time at the same airport from different airlines and they came through for their customers. I received no consolation it assistance with overnight accommodations."

Pros: "We were delayed due to weather and Delta brought a cart of snacks and drinks over to the gate for us."

Pros: "People, your people were fantastic!"

Pros: "The boarding process was very smooth and we took off early and the crew was great and then we also arrived 30 minutes early."
Cons: "Nothing could be changed."

Cons: "If delay to much pls let customer out of plane"

Cons: "As a handicaped disabled not able to walk and should be using a wheel chair,as I know from my many previous travels with other companies like lufthanza, klm..etc, I used to be the first traveller to go to the air craft when loading it to take off and the last one who would be leaving it after landing. Even when going through the check and security points I used to go in a special route especially for the handicaped but going with all other normal travelers lines with such amount of time waiting and crowdness is completely inconvenient. what happened through the trip was quit different , going with the travelers or after when they are boarding the craft make it very hard and time consuming , Wish you take care of it, as it's a very important handicaped service. Thank you for taking the time to read my comment"

Pros: "Great service."

Pros: "Friendly Staff"

Pros: "Service"
Cons: "Nothing"

Pros: "Finish currently use were the most courteous and caring I ever was serviced by."
Cons: "Not much to recall"

Pros: "It is good"

Cons: "No tv on seat. Those dumb comedy tv show"

Pros: "It was very inexpensive and on time. And it was much more comfortable than those budget airlines like Spirit, Frontier, etc."
Cons: "The snack choice was unappealing."

Cons: "The touch-screen entertainment system was not very responsive. It was difficult to get the screen to recognize your selection."

Pros: "Aircraft comfort and entertainment options"

Pros: "I like it! Thank you, kayak"

Pros: "Friendly and prompt service."

Pros: "personal entertainment systems and charging plugs"
Cons: "only pretzels and no headphones offered for the entertainment systems."

Cons: "Aircraft need to be updated. Or price should be credited when you get such an old aircraft."

Pros: "Entertainment and great beverage options"

Pros: "Seat were comfortable and I didn't feel claustrophobic."

Pros: "Todo muy bueno"

Pros: "The staff was friendly and helpful"
Cons: "There was a ton of turbulence"

Cons: "Boarding late"

Pros: "NOTHING"
Cons: "Everything. DELAYS___DELAYS"

Pros: "Pretty comfortable"

Pros: "On time."

Cons: "Got cancelled"

Pros: "very smooth, ontime ride.. kool"
Cons: "everything was ok"

Pros: "Delays caused a little stress but all in all a good experience."
Cons: "Late arrival to DCA."

Pros: "The TIMING AND ATMOSPHERE"

Pros: "Upon sitting down, I was able to fall asleep almost instantly. The helpful stewardesses were constantly aware of my needs."
Cons: "Check-in desk seemed confused and unorganized. Two very friendly ladies were helping out but were on different wavelengths."

Cons: "Numerous delays and disappointments. Two delays before boarding. Another long delay after boarding waiting for paperwork to be completed. Long taxi period. Waited over half hour for baggage claim conveyor to start rolling."

Pros: "Very professional"
Cons: "We didn't leave on time"

Pros: "Everyone was gracious and very helpful. Wheel chairs waiting at each stop. Special ramp installed at CHO, VERY HELPFUL."

Cons: "EXTREMELY LONG CHECK IN & SECURITY LINES"

Pros: "On time arrival despite two issues at the departure gate"

Pros: "Service, comfort, timeliness."
Cons: "Food was marginal, especially the chicken in the salad, which was petrified."

Pros: "Everything was very professional."

Pros: "Boarding was smooth"
Cons: "It was fine"

Pros: "Good"

Pros: "Roomy & comfortable seating for such a small aircraft"
Cons: "Late boarding, over an hour"

Cons: "Gate changed and baoarding time changed countless times."

Cons: "No tv."

Pros: "Both planes were delayed"
Cons: "I did not appreciated getting to my destination so late."

Pros: "This was ok"

Cons: "Touch screen for movies is hard to use"

Pros: "Safe. Secure. Nonstop. 2 meals. Affordable. Polite attendants. Free wine. Movies. TV shows. Free headphones. Pillows. Blankets."
Cons: "0"

Pros: "Nothing"
Cons: "Everything"

Pros: "nothing"
Cons: "everything"

Pros: "Spatious"

Pros: "Not Pplicable because I never made it to Charlotte"

Pros: "Z"

Pros: "No seat not comfortable."
Cons: "No legroom."

Pros: "the crew was very helpful"
Cons: "seats could have been a little wider"

Cons: "Roomy aisles and seats, on time boarding and flight. Great job!"

Pros: "Punta Gorda was not over-busy. So the hassle level of the pre--flight experience was way down from the norm nowadays. The flight was on time, and only mostly full, not crowded."
Cons: "Not even water free infliight is a tad chintzy. Allegiant is not responsible for this, but the seat belt sign was on most of the time. I counld wish for better weather enroute. On arrival at ALB there was not video display announcing the belt numbers fror different arriving flights. One had to just drift from belt to belt"

Pros: "Crew and plane ride."
Cons: "The seats hurt us."

Cons: "Late to load and then put us all on the plane and made us sit on tarmac for over 1 1/2 hours"

Pros: "Friendly crew."

Pros: "The crew was fantastic!"
Cons: "I wish there was at least a free beverage."

Pros: "Direct flight was very nice. Took off on time and arrived slightly early. Flight crew was friendly and efficient."
Cons: "Baggage check not staffed until 2 hrs before flight and then it's a 20-30 minute wait to check a bag. Seats were uncomfortable, but tolerable for 2 hrs."

Pros: "Nothing"
Cons: "Flight attendants talked loudly the whole flight. Very uncomfortable"

Pros: "Met expectations"
Cons: "Met expectations"

Pros: "Crew was friendly, boarding process was easy, spacious aisles"
Cons: "The seats do not recline and are not very comfortable. Drinks and snacks are not complimentary"

Pros: "Crew food. Seat small little leg room."
Cons: "Plane on time. More leg room."

Pros: "Price of ticket. Crew was efficient."
Cons: "Baggage limitations are not clear: especially when the ticket says no carryon luggage. What they mean is anything that fits under your seat and is under 20 lbs is OK. Seat did not recline. Leg room was poor."

Cons: "Free cokes, water, and peanuts would be great."

Cons: "Everything went quickly and smoothly. Great flight; even the weather was less turbulent than expected."

Pros: "Comfort nice cool cabin on boarding"
Cons: "No complaints with airline but flight was a little ruff on approach made me a little nauseous."

Pros: "The actual flight was comfortable and the crew was good."
Cons: "Flight time was pushed back a few weeks ago. Slow boarding process so we landed about 30 min late."

Cons: "Very uncomfortable"

Cons: "Delayed due to weather"

Pros: "loading was smooth, departure was a bit early, arrival in Cedar Rapids was about 30 minutes early!!"

Pros: "Crew friendly and professional"
Cons: "Everything is extra, even water or soda. Seats are narrow so glad im not a heavier person"

Cons: "The airports restaurants closed and security shut down as well. We were prisoners in the airport with only a vending machine. Unbelievable. Believe the Allegiant Air stories from 60 Minutes. The stories are true."

Pros: "Made it home safely."
Cons: "Waited on tarmac 2.5 hrs. Then plane delayed 10 hours. Then waited on tarmac 2 more hours. Horrible first experience flying with Allegiant."

Pros: "Quick and very smooth flight, amazing flight attendants."
Cons: "Wish at least one drink/soda was free. Boarding line was so slow."

Pros: "Even though the flight was delayed by more than 2 hours, we were able to make it home."
Cons: "Started with constant delays. Flight ended up leaving around 8:30 when the flight was supposed to leave at 5:59. Once boarded there were no snacks, no liquor and only a few options to drink. The flight attendant was mumbling and kept on messing up what he was supposed to say the entire flight."

Cons: "4 hours late. No explanation. I have flown Allegiant 3 times. Late twice."

Cons: "The seating is terrible. Everyone is like sardines packed away."

Pros: "The entire crew we're so accommodating and Robin was hilarious, made the hassle of traveling enjoyable and entertaining."
Cons: "Nothing all was great!"

Pros: "Friendly Crew. Staff did expedite our checking bags to make our flight when we asked about our flight that started boarding early and made sure our bags made the flight. Excellent pilots, trip went seamless from wheels up to wheels down."
Cons: "Boarding started 30 minutes earlier than first notified as, Long lines to check bags."

Pros: "No Delays All went smooth & arrived early!"

Pros: "The service is not extravagant but completely adequate. Also, it is very consistent every time I fly them."
Cons: "Nothing at all."

Pros: "- Good price, even with carry-on and larger seat. - Comfortable seats, despite no incline - better than major airlines."
Cons: "- No food or drinks. - No entertainment. Both are acceptable given the price. - Misinformation regarding flight delay, I was sent notifications and app updated to be 1 hour late. However on arrival, boarding time was as usual."

Pros: "I arrived safely Tommy Destination"
Cons: "It was so hot boarding and unloading. There was no air. Staff was curt and not very friendly as of assistance."

Cons: "Moving from one gate to another. The three hour delay. It appeared that no one person really knew what they were doing. The disabled in wheel chairs we left on there own. One elderly woman literally fell out of her wheel chair to the floor. I was discusseded by the events of the airline."

Cons: "Old plane with fixed seats with very limited leg room which were not comfortable- broken window shades, scratched windows, & rattles everywhere made for a long flight. Crew was ok, I would fly again if the price was enough of a savings"

Pros: "I never have any issues. Everything is always great."

Pros: "Very nice flight attendants."
Cons: "45 minute delay my 1st flight and a 2 hour delay on the 2nd. It's become so late so consistently that I don't even bother to arrive early anymore."

Pros: "Allegiant is a great flying experience! A little bit of a wait at BLV,but that will be fixed once they get the other TSA checking completed. VLP was a smooth and easy experience!"
Cons: "We weren't given a menu in the Kayak App to choose seats or bags at purchase. Kayak needs to rectify this. It caused us to spend more money on our bags especially..."

Cons: "7 hour delay. Giving us delays in increments so we couldn't make a decision to leave."

Pros: "Low cost, great service, arrived 20 min early"
Cons: "Seats were kinda tight but I'm sort of used to that"

Pros: "It was so fun to have a flight attendant that had a great sense of humor. She kept us in stitches throughout the flight."

Pros: "The crew was very friendly"
Cons: "The flight was delayed 2 hours. The plane was freezing the entire flight. Apparently, the crew tried to get the pilot to turn down the air, but it never happened. I hate how Allegiant nickel and dimes you. Not even a cup of water is free."

Cons: "Leg space tight. Seat didn't recline. They said the maximum width on the under seat personal item is 7 inches but space is big enough for wider than that. I felt that was misleading."

Pros: "Direct flight much better not having to change planes."
Cons: "Everything was fine on this flight would be nice to have Wi-Fi on planes."

Pros: "Cabin crew was very helpful and polite. One in particular expressed a great sense of humor throughout the flight and had a great rapport w/ passengers. Flight was on-time. Fare was $111 compared to around $375 to Orlando. I was able to fit this flight into my scheduled so saved the company $$."
Cons: "Can't blame Allegiant for a noisy child, but there was a child across the aisle from me who shrieked and talked loudly THE WHOLE FLIGHT. I was trying to sleep and was NOT pleased. I like a good fare, but selling a can of Coke on the flight for $2 seems a bit extreme. Glad there are cut-rate airlines out there as an option, but I won't be flying them any more than necessary."

Pros: "The crew was exceptionally friendly and helpful."
Cons: "Seats don't recline."

Pros: "direct flight to where i wanted to go was great initial fare was very low, add-ons added up though."
Cons: "flight out was handled by Miami Air, lost the money i spent on a seat. everything costs extra, including printing a boarding pass. the app wouldn't let me check in so i had to go to the desk. i had to show the person that the app told me to go the desk then she printed the pass for free."

Cons: "Delayed the flight for 7 and a half hours. They then tried to not refund my money"

Pros: "We had kids wound up from Disney and caused all kinds of problems. Normally the attendants are irritated, every single one of these remained genuinely polite. I really thought the staff/crew were great. Other than that the flight was fine, a little late, but all went well."
Cons: "First Allegiant flight, so I did not realize the 40 lb bag limit. Made for a last minute headache during checkin."

Cons: "flight was late close to 4 hrs"

Cons: "I choosed this very very expensive flight because it was so import to be home in CPH at 9.00 for an important meeting. My flight from Chicago was delayed and nothing was done by the pilots to arrive on time. Despite the delay, I managed to arrive on time to my Connecting flight to CPH - only to realize that I was moved to a later flight. Now I have spent 2.300 USD on a poor flight that do NOT bring me to my destination on time. I am a frequent flyer, and will do everything I can Avoiding United going forward. Never United again"

Pros: "It was just okay"
Cons: "Nothing just flying in a smaller plane"

Pros: "Flew United out of Sioux Falls. Check in took forever. United employees were miserable. Did get some help from a very nice TSA woman. TSA check in was a nightmare. Almost missed flight. Complete chaos. The sat on runway for 40 minutes waging for luggage to be loaded. Almost missed connecting flight. Just plane horrible. Very helpful stewardess however."

Pros: "Flight was okay"
Cons: "Flight was almost 2 hrs delayed"

Pros: "Bathrooms were clean"
Cons: "Seat room/especially when the person in front reclined"

Cons: "crying babies and no food"

Pros: "It was great. Absolutely no complaints"

Pros: "The staff was friendly"

Pros: "Perfect"

Pros: "Times"
Cons: "Everything else"

Cons: "I don't being changed to United flights"

Pros: "Loved it."

Pros: "Everyone was very nice"
Cons: "45 minute late departure. Very cramped and uncomfortable seating"

Pros: "View out the window"

Pros: "I got all my steps I while waited. Was rebooked on an American airplane for my connection on Chicago"
Cons: "Over a 3 hr delay in leaving Flont"

Cons: "They mis-tagged my bag and still haven't found it and have not been helpful or informative when I call to check the status"

Pros: "The struf waffles"
Cons: "Every thing went well"

Cons: "3 hr delay.,..no real reason. :("

Pros: "Was quick enough and on time."
Cons: "Please start charging obese customers more money for their tickets. Seat I was in had me squished because the other passenger was so big. Its not fair that I have to give up half of my seat."

Pros: "Good"
Cons: "Good"

Pros: "I enjoyed the roomier seat."
Cons: "It would be nice to have one of your complimentary snacks gluten-free."

Cons: "Can't fit in seat"

Pros: "No delay, nice staff"
Cons: "Seat next to bathroom"

Cons: "Very cold on flights, no blankets"

Pros: "Ice cream Sunday."
Cons: "45 minutes delay at Rome during departure. Dirty bathroom. Limited movies."

Cons: "The boarding process is a bit chaotic. I honestly think the wi fi should be free."

Cons: "When I found out I had to pay for my luggage that was it for me. Everything went downhill from there."

Cons: "The wait"

Pros: "Smooth"

Pros: "Nice people working."
Cons: "The weather! And air traffic control!!"

Pros: "On time. Early."

Pros: "Fast and easy to use"
Cons: "None"

Pros: "I'm home safe"
Cons: "The delay"

Pros: "Everything was in time."

Cons: "I did not go to Edmonton, and was not notified. They placed me on a non stop from Vancouver to Chicago. It was lucky that I caught the change."

Cons: "The baggage claim at San Luis obispo was not acceptable"

Pros: "Ride was ok. Both our flights from Chicago were delayed. No one tried to explain or offer any apology. No one offered to complete anything or offer coupons for meals. I thought that was extremely rude."
Cons: "See above. Very disappointed. There were four of us and my 76 year old father has health issues and was very uncomfortable."

Cons: "Flights were all delayed or cancelled"

Pros: "Quick, simple, easy to set up. Saved us from spending overnight in Atlanta waiting on Southwest."
Cons: "Nada."

Cons: "I like everything from this."

Pros: "I was glad to see that the security check line was moving quickly. Sacramento is usually my go to airport when in northern California because it's so much easier to get to where you need to in a timely fashion too."

Pros: "Always the service is above and beyond"
Cons: "No complaints"

Pros: "Being upgraded"
Cons: "Nothing was bad"

Cons: "Where do I start. Let's start with booking and the lack of knowledge, inability to listen and respond in an appropriate manner, and the fact that after I asked to speak to a manager due to the previous issues with the agent, and after being transferred all I needed was some understanding and support due to a family emergency and instead I get a short rude push back and then hung up on by the manager after I expressed my struggle and desperation for help. The lack of empathy and just the overall experience was beyond horrible, and if it wasn't for the desperate situation I was in I would have never used your services."

Pros: "courteous attendents and airport personnel. on time flight"
Cons: "nothing"

Cons: "considerate steward checked for wheelchair at ORD"

Pros: "So, glad that United has come full circle after some adjustment phases and flying changes that is back to being "The Friendly Skies""

Pros: "Attendants were very courteous and helpful"

Pros: "Only person in the row so could work sideways."
Cons: "Very cramped, movies and shows require payment"

Pros: "That our pilot was confident in getting us home safely in a storm!!"
Cons: "Nothing."

Pros: "Everything was good"

Pros: "Quick, easy. Friendly staff.."

Cons: "The plane was delayed due to “maintenance” but no explanation was given as to why."

Pros: "Nothing"
Cons: "Waiting for 2+ hours at the gate waiting for the plane to leave."

Pros: "Always liked frontier."
Cons: "Wait was a longer than expected."

Pros: "Gave me a great seat"

Pros: "Service was fast and friendly and very efficient!!"

Cons: "Everything was fine other than how cold it was on the plane. The coldness actually woke me up several times because it was so bad."

Cons: "I can not adjust the chair. Not comfortable."

Pros: "not much"
Cons: "boarding process was a disaster. no one knew what they were doing. $30 for a carry? seriously? No free snack on the plane. Everything cost $5-$10... never again will i fly Frontier."

Cons: "at the last minute before boarding had to change gates"

Pros: "Are you kidding?"

Pros: "Average"
Cons: "Stewardesses were rude, took forever for the plan to taxi to our gate, 2 delays in which the emails were sent very late to let us know."

Pros: "What is to like?"
Cons: "everything!"

Pros: "Speedy boarding, take off was smooth."
Cons: "Seating was a little cramp, landing was rough."

Pros: "Quick easy no hassle"
Cons: "Having to pay alacarte for everything"

Cons: "Terrible"

Cons: "no precheck available?"

Pros: "Plane is very nice"
Cons: "Too expensive fee for the baggage"

Pros: "nothing"
Cons: "everything"

Cons: "Prices to high"

Pros: "NOTHING"
Cons: "EVERYTHING"

Pros: "Nothing"
Cons: "Everything"

Cons: "DELAYED"

Cons: "Charge for cabin lugguage and soft drinks"

Cons: "Be careful flying budget airlines. Their gate options are few if something goes wrong."

Pros: "Delayed 2 hours with no update information. As a frustrated passenger asked for answers. Called all over the nation for help. Upon boarding, was told Frontier had the right not to serve me. Refunded my money and then i had to book through another airline at 3am... long story short, nightmare."
Cons: "All of it."

Cons: "The seat headrest was uncomfortable hard to sleep.."

Pros: "Upgraded us!"
Cons: "Told us the Wrong carrosol for our baggage."

Pros: "Boarded quickly"
Cons: "Boarded quickly to sit forever. We taxied in Chicago for 30 min..."

Cons: "That we had to buy drinks and snacks"

Pros: "Fast boarding, earlier departure and very earlier arrival."
Cons: "No entertainment"

Cons: "It's the most basic you can get... I never seen an airline that offers more alcohol than good onboard I spend over 3- 1/2 hr completely starving The seat doesn't recline no entertainment what's so ever . It's 2016 Let's stop this world war 90's"

Pros: "Not a thing!"
Cons: "The lack of empathy for my situation."

Cons: "I fly quite a bit. Take off was very rough. Also I have TSA Pre check but Frontier doesn't seem to have this so that was inconvenient."

Pros: "The prices"

Pros: "N/a"
Cons: "N/a"

Cons: "I got charged for selecting my seat. The additional cost was never mentioned before booking my trip. I won't fly frontier again!"

Pros: "Very roomy cabin"
Cons: "Absence of basic amenities like water"

Pros: "Attendants were pleasant and arrivals and departures were excellent....other than that I would not recommend this airline."

Cons: "Uncomfortable chairs,"

Pros: "Everything"
Cons: "Nothing"

Pros: "Biggest negative? Charged me 30 dollars to check my luggage, tossed it around so much that a bottle of scotch broke all over the contents, leaving me nothing to give as gift and nothing to wear . When I asked the representative at the airport what she could do about it, she said, "oh those things happen. " Not planning to go with Frontier again."

Cons: "They lost my baggage, and didn't make an effort to get it to me the same day."

Pros: "Nothing"

Cons: "the lady at the counter told me that my bag was ok if i told some things out , i threw away some things i wanted came back and she preceeded to tell i still had to pay 45 dollars and she did not tell me that so i lost my samples and am very angry"

Cons: "Over 1.5 hr delay in Las Vegas- sometime cannot be helped, I understand."

Pros: "Nothing"
Cons: "Everything"

Pros: "Not much"
Cons: "A whole lot"

Read more about Delta
COVID-19 information

Safety measures for airlines flying from Sioux Falls to Illinois

Airlines flying from Sioux Falls to Illinois have enacted additional safety measures and adjusted policies to better accommodate travelers. Policies vary by airline.

Heightened sanitation

Daily cleaning, installation of cabin HEPA filters on flights from Sioux Falls to Illinois

Mandatory masks

Masks required on board, masks provided on flights from Sioux Falls to Illinois

Social distancing seating

Middle seats unavailable to book on flights from Sioux Falls to Illinois

Pre-flight testing

Testing for antibodies, testing for symptoms for flights from Sioux Falls to Illinois

Book cheap flights from Sioux Falls to Illinois

Recent round-trip flight deals

5/14
Fri
1 stop
Multiple Airlines
28h 53m
FSD - ORD
5/18
Tue
2 stops
Multiple Airlines
24h 02m
ORD - FSD
5/24
Mon
1 stop
Multiple Airlines
27h 17m
FSD - ORD
5/26
Wed
1 stop
Multiple Airlines
21h 40m
ORD - FSD
8/20
Fri
1 stop
American Airlines
26h 38m
FSD - ORD
8/22
Sun
nonstop
American Airlines
1h 49m
ORD - FSD
5/14
Fri
2 stops
Multiple Airlines
16h 55m
FSD - ORD
5/18
Tue
2 stops
Multiple Airlines
24h 02m
ORD - FSD
5/24
Mon
2 stops
Multiple Airlines
10h 56m
FSD - ORD
5/26
Wed
1 stop
Multiple Airlines
19h 53m
ORD - FSD
5/24
Mon
2 stops
Multiple Airlines
14h 48m
FSD - ORD
5/26
Wed
2 stops
Multiple Airlines
36h 38m
ORD - FSD
6/22
Tue
1 stop
American Airlines
13h 18m
FSD - BMI
6/23
Wed
1 stop
American Airlines
11h 03m
BMI - FSD
5/21
Fri
1 stop
Multiple Airlines
28h 53m
FSD - ORD
5/24
Mon
1 stop
Multiple Airlines
8h 31m
ORD - FSD
5/21
Fri
2 stops
Multiple Airlines
12h 32m
FSD - ORD
5/24
Mon
1 stop
Multiple Airlines
8h 31m
ORD - FSD
6/6
Sun
nonstop
American Airlines
1h 50m
FSD - ORD
6/6
Sun
1 stop
American Airlines
18h 14m
ORD - FSD
5/20
Thu
1 stop
American Airlines
10h 01m
FSD - ORD
5/21
Fri
nonstop
American Airlines
1h 47m
ORD - FSD
6/17
Thu
1 stop
Frontier
27h 26m
FSD - ORD
6/20
Sun
1 stop
Frontier
11h 06m
ORD - FSD
6/10
Thu
1 stop
Frontier
27h 26m
FSD - ORD
6/13
Sun
1 stop
Frontier
11h 06m
ORD - FSD
6/17
Thu
2 stops
Frontier
23h 48m
FSD - ORD
6/20
Sun
1 stop
Frontier
11h 06m
ORD - FSD
8/25
Wed
1 stop
Delta
4h 35m
FSD - ORD
8/28
Sat
1 stop
Delta
3h 19m
ORD - FSD
8/25
Wed
1 stop
Delta
3h 52m
FSD - MDW
8/28
Sat
1 stop
Delta
4h 12m
MDW - FSD
7/27
Tue
2 stops
United Airlines
12h 56m
FSD - ORD
7/30
Fri
2 stops
United Airlines
16h 56m
ORD - FSD
7/14
Wed
1 stop
Delta
5h 57m
FSD - ORD
7/18
Sun
1 stop
Delta
5h 40m
ORD - FSD
6/1
Tue
1 stop
Delta
3h 47m
FSD - MDW
6/5
Sat
1 stop
Delta
6h 34m
MDW - FSD
5/20
Thu
2 stops
Allegiant Air
30h 51m
FSD - MDW
5/23
Sun
2 stops
Allegiant Air
34h 31m
MDW - FSD
Show more results

Recent one-way flight deals

5/14
Fri
1 stop
Frontier
28h 53m
FSD - ORD
5/19
Wed
1 stop
Frontier
27h 53m
FSD - ORD
5/19
Wed
2 stops
Multiple Airlines
11h 32m
FSD - ORD
5/21
Fri
1 stop
Frontier
28h 53m
FSD - ORD
6/2
Wed
1 stop
Frontier
27h 53m
FSD - ORD
5/21
Fri
2 stops
Multiple Airlines
12h 32m
FSD - ORD
5/14
Fri
2 stops
Multiple Airlines
26h 57m
FSD - ORD
6/26
Sat
1 stop
Multiple Airlines
24h 26m
FSD - ORD
5/22
Sat
2 stops
Multiple Airlines
12h 33m
FSD - ORD
6/2
Wed
2 stops
Multiple Airlines
13h 41m
FSD - ORD
5/22
Sat
3 stops
Multiple Airlines
37h 16m
FSD - ORD
5/20
Thu
1 stop
American Airlines
10h 01m
FSD - ORD
5/16
Sun
1 stop
American Airlines
14h 19m
FSD - ORD
6/2
Wed
3 stops
Multiple Airlines
35h 25m
FSD - ORD
6/25
Fri
1 stop
American Airlines
8h 18m
FSD - ORD
5/23
Sun
1 stop
American Airlines
10h 01m
FSD - ORD
5/16
Sun
2 stops
Allegiant Air
30h 51m
FSD - MDW
6/2
Wed
nonstop
American Airlines
1h 48m
FSD - ORD
5/23
Sun
2 stops
Delta
10h 45m
FSD - ORD
5/21
Fri
nonstop
United Airlines
1h 42m
FSD - ORD
Show more results
-
1
  • Round-trip
  • One-way
  • Multi-city
  • Trip Builder
  • Economy
  • Premium Economy
  • Business
  • First
  • Multiple
Economy
  • Economy
  • Premium Economy
  • Business
  • First
Economy
  • Economy
  • Premium Economy
  • Business
  • First
Economy
  • Economy
  • Premium Economy
  • Business
  • First
Economy
  • Economy
  • Premium Economy
  • Business
  • First
Economy
  • Economy
  • Premium Economy
  • Business
  • First
Economy
  • Economy
  • Premium Economy
  • Business
  • First