How does KAYAK find such low prices on flights from Illinois to Sioux City?

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 Sioux City.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Sioux City?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Sioux City from 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 Illinois to Sioux City?

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 to Sioux City with an airline and back to Illinois with another airline.

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

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 to Sioux City from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

$244 CHEAP FLIGHTS from Illinois to Sioux City

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Cheap Flights from Illinois to Sioux City

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Direct

Recent round-trip flight deals from Illinois to Sioux City

Sat, Oct 31 - Sat, Nov 7

4:20 pm - 6:10 pmORD Chicago O'Hare Intl-SUX Sioux City Sioux Gateway

1h 50mnonstop

6:00 am - 7:59 amSUX Sioux City Sioux Gateway-ORD Chicago O'Hare Intl

1h 59mnonstop

$244United Airlines

Fri, Nov 6 - Sun, Nov 8

4:20 pm - 6:10 pmORD Chicago O'Hare Intl-SUX Sioux City Sioux Gateway

1h 50mnonstop

6:00 am - 7:59 amSUX Sioux City Sioux Gateway-ORD Chicago O'Hare Intl

1h 59mnonstop

$284United Airlines

Fri, Nov 6 - Tue, Nov 10

4:20 pm - 6:10 pmORD Chicago O'Hare Intl-SUX Sioux City Sioux Gateway

1h 50mnonstop

6:00 am - 7:59 amSUX Sioux City Sioux Gateway-ORD Chicago O'Hare Intl

1h 59mnonstop

$284United Airlines

Fri, Nov 6 - Mon, Nov 9

4:20 pm - 6:10 pmORD Chicago O'Hare Intl-SUX Sioux City Sioux Gateway

1h 50mnonstop

6:00 am - 7:59 amSUX Sioux City Sioux Gateway-ORD Chicago O'Hare Intl

1h 59mnonstop

$284United Airlines

Fri, Nov 6 - Wed, Nov 11

4:20 pm - 6:10 pmORD Chicago O'Hare Intl-SUX Sioux City Sioux Gateway

1h 50mnonstop

6:00 am - 7:59 amSUX Sioux City Sioux Gateway-ORD Chicago O'Hare Intl

1h 59mnonstop

$284United Airlines

Wed, Nov 18 - Thu, Nov 26

4:20 pm - 6:10 pmORD Chicago O'Hare Intl-SUX Sioux City Sioux Gateway

1h 50mnonstop

6:00 am - 7:59 amSUX Sioux City Sioux Gateway-ORD Chicago O'Hare Intl

1h 59mnonstop

$325United Airlines

Tue, Jan 26 - Sat, Jan 30

4:10 pm - 6:11 pmORD Chicago O'Hare Intl-SUX Sioux City Sioux Gateway

2h 01mnonstop

5:04 am - 7:10 amSUX Sioux City Sioux Gateway-ORD Chicago O'Hare Intl

2h 06mnonstop

$366United Airlines

Fri, Nov 6 - Sat, Nov 7

4:20 pm - 6:10 pmORD Chicago O'Hare Intl-SUX Sioux City Sioux Gateway

1h 50mnonstop

6:00 am - 7:59 amSUX Sioux City Sioux Gateway-ORD Chicago O'Hare Intl

1h 59mnonstop

$366United Airlines

Tue, Jan 26 - Sat, Jan 30

4:00 pm - 5:54 pmORD Chicago O'Hare Intl-SUX Sioux City Sioux Gateway

1h 54mnonstop

9:03 am - 10:55 amSUX Sioux City Sioux Gateway-ORD Chicago O'Hare Intl

1h 52mnonstop

$366United Airlines

Fri, Nov 6 - Mon, Nov 9

5:30 pm - 6:10 pmPIA Greater Peoria-SUX Sioux City Sioux Gateway

24h 40m1 stop Chicago O'Hare Intl

6:45 pm - 9:06 pmSUX Sioux City Sioux Gateway-PIA Greater Peoria

26h 21m1 stop Denver Intl

$687United Airlines

Useful Info

Low season	July
High season	June
Cheapest flight	$244

Best time to beat the crowds with an average 5% drop in price.

Most popular time to fly and prices are also 26% lower on average.

Flight from Chicago to Sioux City

How does KAYAK find such low prices on flights from Illinois to Sioux City?
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 Sioux City.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Sioux City?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Sioux City from 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 Illinois to Sioux City?
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 to Sioux City with an airline and back to Illinois with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to Sioux City?
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 to Sioux City from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.