Cheap flights from Denmark to Illinois from $373

The cheapest month to fly to Illinois from Denmark is in November. Flight prices, which tend to average around $312, 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 November, then flying in May is also cheap. Prices for this month can be found on momondo for an average of $320.

The cheapest day to depart from Denmark to Illinois is on a Wednesday when prices can be found for as low as $679. Flights from Denmark to Illinois on a Tuesday will generally be more expensive and average around $1,163. 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 at noon. Flights from Denmark to Illinois during this time can be as low as $756. Flights in the afternoon are often more expensive with an average ticket price of $1,067.

Fly from Kastrup Copenhagen to Chicago O'Hare Intl for the best Denmark - Illinois flight prices

You are more likely to see cheaper flights to Illinois from Denmark when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $688 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Denmark for as low as $542 on momondo.

As of May 2026, 1 flights take off from Denmark and land in Illinois each day. The most common flight departure time for this route is 1:00PM, with 100% of daily flights taking off in the afternoon.

As of May 2026, 12 flights take off from Denmark and land in Illinois each week. The most common flight departure day for this route is Mon, with 25% of weekly flights taking off on this day.