Cheap flights from Rome to Illinois from $361

The cheapest month to fly to Illinois from Rome is in September. Flight prices, which tend to average around $685, 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 November is also cheap. Prices for this month can be found on momondo for an average of $703.

The cheapest day to depart from Rome to Illinois is on a Thursday when prices can be found for as low as $746. Flights from Rome to Illinois on a Tuesday will generally be more expensive and average around $990. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

Fly from Rome Fiumicino to Chicago O'Hare Intl for the best Rome - Illinois flight prices

You are more likely to see cheaper flights to Illinois from Rome when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $820 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Rome for as low as $648 on momondo.

There are 3 cabin classes available to choose from on Rome to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

You could potentially save up to 3% on your flight if you consider stops on a Rome to Illinois flight.

Icelandair, Aer Lingus, and British Airways are the most popular carriers operating from Rome to Illinois

United Airlines, American Airlines and ITA Airways are the top three most popular airlines that fly to Illinois from Rome according to our data. United Airlines is the first choice among our users, with 63% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 3 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

As of November 2026, there are 6 flights per day flying from Rome to Illinois. The most common time of day flights depart is 9:00AM, with 91% of flights taking off at noon.

As of November 2026, 44 flights take off from Rome and land in Illinois each week. The most common flight departure day for this route is Wed, with 16% of weekly flights taking off on this day.