Cheap Flights from Chicago to Sioux City

Compare Chicago to Sioux City flight deals

Find the cheapest month or even day of the year to fly to Sioux City

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Flight deals from Chicago to Sioux City Airport

Looking for a cheap last-minute deal or the best return flight from Chicago to Sioux City? Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Chicago to Sioux City

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Chicago to Sioux City flights are currently cheapest in March.

Direct flights from Chicago to Sioux City

Chicago to Sioux City: Alternative routes

Compare routes from Chicago to Sioux City below. You may find an airport to fly into that's cheaper, faster, or easier than Sioux City.

Chicago to Sioux City: Flight information

The things to know before you go.
Cheapest flight foundR 2,681
Cheapest month to flyMarch
Average flight time1 hr, 52 mins
Most popular airlineUnited
Average flights per week32

Finding cheap flights from Chicago to Sioux City: Frequently asked questions

The best price we found for a return flight from Chicago to Sioux City is R 4,432. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
1 hour and 52 minutes is the average flight time from Chicago to Sioux City.
United and SkyWest Airlines fly direct from Chicago to Sioux City.
As of March 2026, there are 32 flights per week flying from Chicago to Sioux City.
The cheapest month to fly from Chicago to Sioux City is usually March.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Chicago to Sioux City Airport on Thursday, 26 March 2026.
Yes – the average flight time is 1 hour and 52 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Sioux City but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Sioux City is around 40 days in advance, so don’t leave your flight to the last minute.
The cheapest airline that flies to Sioux City is United .

Flying from Chicago to Sioux Gateway Airport (SUX): What you need to know

  • Begin your trip planning by checking out the best place to catch your flight from Chicago to Sioux Gateway Airport (SUX). Explore your options for setting off from O'Hare International Airport (ORD) or Chicago Midway International Airport (MDW), the city's main airports.

  • The average length of a direct Chicago to Sioux Gateway Airport flight is 1 hour 45 minutes.

  • Sioux City's timezone is UTC-5, which is the same as Chicago. Sioux Gateway Airport is located in Sioux City.

  • You can pick from 7 direct flights each week between O'Hare International Airport (ORD) and Sioux Gateway Airport (SUX). This is the busiest route, with United Airlines offering a 8:40pm departure from ORD to SUX.

  • Your flight from Chicago to SUX won't wait if you're late, so get to the airport with time to spare. Arrive up to one hour in advance for domestic flights and two hours ahead when you're travelling internationally.

  • In high season, expect extended wait times and be there earlier. Aim for at least two hours ahead for domestic flights and up to four hours for international trips.

Airports in Chicago

O'Hare International Airport (ORD)

  • You can jump on a direct flight from Chicago to Sioux Gateway Airport (SUX) out of O'Hare International Airport (ORD).

  • United Airlines is a well-known carrier that operates direct flights from Chicago to Sioux Gateway Airport taking off from ORD.

  • United Airlines is the most frequently booked airline offering flights from ORD to SUX.

  • The carrier with the most reliable on-time arrival rate on this route is United Airlines.

  • Located around 40 kilometres from central Chicago, ORD can be reached in about 35 minutes by car (depending on traffic). The journey by public transport is roughly 55 minutes.

  • In search of a convenient hotel near O'Hare International Airport? If you're catching an early flight from Chicago to Sioux Gateway Airport, these stays will put you a quick hop from check-in:

  • 74.85% of flights departing from O'Hare International Airport arrive at their destination on time.

  • You'll find ORD at 10000 West O'Hare.

Chicago Midway International Airport (MDW)

  • You can get to MDW from central Chicago in approximately 20 minutes by car, depending on traffic. The ride on public transport takes roughly 45 minutes to cover the 19 kilometres or so.

  • Get a head start on your holiday with an additional night away from home. Before catching your Chicago to SUX flight, unwind in one of these hotels close to Chicago Midway International Airport:

  • When it comes to keeping flights on track, Chicago Midway International Airport has an on-time arrival performance of 77.88%.

  • MDW is located at 5700 South Cicero.

Chicago Rockford International Airport (RFD)

  • The journey time to RFD from central Chicago is around 4 hours 15 minutes by public transport. If you're planning to travel by car, it'll take you roughly 1 hour 25 minutes to cover the 137 kilometres or so.

  • Make catching an early Chicago to Sioux Gateway Airport flight the easiest part of your journey. Stay at one of these hotels near Chicago Rockford International Airport and get to your departure gate with time to spare:

  • The on-time performance rate of RFD is 76.19%. To put it simply, that's how often flights that depart this airport arrive at their final stop as planned.

  • You'll find Chicago Rockford International Airport at 2 Airport Cir.

About Sioux Gateway Airport (SUX)

Getting from Sioux Gateway Airport (SUX) to central Sioux City

  • Sioux Gateway Airport is around 13 kilometres from the centre of Sioux City. It takes around 10 minutes or so to get to the city by car.

  • It takes around 30 minutes if you're travelling by public transport.

How to find the cheapest flights from Chicago to Sioux Gateway Airport (SUX)

  • R 2,681 is currently the best price for a one-way ticket from Chicago to Sioux Gateway Airport. A return flight starts at R 4,432. These prices can change based on demand.

  • Don't leave everything to the last minute. You're more likely to find cheap flights from Chicago to SUX if you book early. Airlines often have some amazing early bird rates.

  • If you can be flexible with your travel plans, use the 'Whole month' tool. It'll give you the cheapest price across each month when searching for your Chicago to Sioux Gateway Airport ticket.

  • There's no need to check every day to find out if prices have dropped when you set up a Price Alert. We'll notify you when a better deal comes up on plane tickets from Chicago to SUX.

  • Tailor your travel plans using filters. Choose your ideal arrival and departure times, airlines and total journey duration. You can also sort the results by 'Cheapest,' 'Fastest' or 'Best' flights from Chicago to Sioux Gateway Airport.

The best time to fly from Chicago to Sioux Gateway Airport (SUX)

  • Think about the kind of experience you want when deciding the best time to fly. February is the quietest month to go to Sioux City. August is when most people book flights from Chicago to Sioux Gateway Airport (SUX), which may be perfect if you're chasing more action.

  • The warmest month in Sioux City is July, with temperatures ranging between 15ºC (59ºF) and 33ºC (91ºF). Lock in your Chicago to SUX plane ticket then if this is the type of weather you enjoy.

  • If you like travelling in cooler conditions, search for a cheap ticket from Chicago to Sioux Gateway Airport in January when temperatures are between -14ºC (7ºF) and 2ºC (36ºF).

More about Sioux City

Explore more of the United States

  • Sioux City is always a good idea, but there are so many other corners of the United States you'll want to see. Around 129 kilometres south of Sioux City, a visit to Omaha will keep you busy. Start with leading attractions like Kiewit Luminarium, Suzanne & Walter Scott Aquarium and OUR BODY: The Universe Within.

  • Lincoln is another must-experience destination in the United States and is around 177 kilometres south of Sioux City. No trip is complete without seeing Hyde Observatory, Museum of American Speed and Lied Centre for Performing Arts.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.