Cheap flights from Salt Lake City to Illinois from $80

The cheapest month to fly to Illinois from Salt Lake City is in September. Flight prices, which tend to average around $358, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of September, then flying in August is also cheap. Prices for this month can be found on momondo for an average of $372.

The cheapest day to depart from Salt Lake City to Illinois is on a Thursday when prices can be found for as low as $495. Flights from Salt Lake City to Illinois on a Sunday will generally be more expensive and average around $649. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

Our most recent data shows that the best time of day to fly to Illinois is in the morning. Flights from Salt Lake City to Illinois during this time can be as low as $517. Flights in the evening are often more expensive with an average ticket price of $626.

Fly from Salt Lake City to Chicago O'Hare Intl for the best Salt Lake City - Illinois flight prices

You are more likely to see cheaper flights to Illinois from Salt Lake City when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $439 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Salt Lake City for as low as $344 on momondo.

There are 4 cabin classes available to choose from on Salt Lake City to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Frontier, Delta, and Southwest are the most popular carriers operating from Salt Lake City to Illinois

American Airlines, Delta and United Airlines are the top three most popular airlines that fly to Illinois from Salt Lake City according to our data. American Airlines is the first choice among our users, with 34% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 5 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

As of August 2026, 36 flights take off from Salt Lake City and land in Illinois each day. The most common flight departure time for this route is 4:00PM, with 61% of daily flights taking off in the afternoon.

The number of flights available between Salt Lake City and Illinois is 254 per week as of August 2026. The most frequent departure day is Sun, with 18% of weekly flights leaving on this day.