Cheap flights from Illinois to Europe from $171

The cheapest month to fly to Europe from Illinois is in February. Flight prices, which tend to average around $594, are often lower during this time because this is during the off-season. If you aren’t able to travel to Europe during the month of February, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $614.

The cheapest day to depart from Illinois to Europe is on a Tuesday. Travelers who choose to depart for Europe on a Tuesday will often find tickets for as low as $838. Flights from Illinois to Europe on a Saturday will generally be more expensive and average around $1,059. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

According to our data, the cheapest time of day to fly to Europe is in the afternoon. momondo users have found flights departing from Illinois to Europe in the afternoon for as low as $939. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Try not to purchase tickets in the evening because they tend to be around $954. Of course, these prices can vary depending on the time of year and what airport you fly to.

Fly from Chicago O'Hare Intl to Lisbon Humberto Delgado for the best Illinois - Europe flight prices

You are more likely to see cheaper flights to Europe from Illinois when booking week ahead of your departure date. In general, you can expect to find flights to Europe for around $842 when searching week out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Europe from Illinois for as low as $791 on momondo.

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

Icelandair, British Airways, and Delta are the most popular carriers operating from Illinois to Europe

United Airlines, TAP AIR PORTUGAL and British Airways are the top three most popular airlines that fly to Europe from Illinois according to our data. United Airlines is the first choice among our users, with 39% of people opting to fly with this airline when traveling to Europe. Keep in mind that there are 24 different airlines that fly to Europe on a routine basis, so you have a few additional options to choose from.

The number of flights available between Illinois and Europe is 140 per day as of July 2026. The most frequent departure time is 6:00PM, with 69% of daily flights leaving in the evening.

As of July 2026, there are 982 flights per week flying from Illinois to Europe. The most common day of the week flights depart is Mon, with 15% of flights taking off on this day.