Cheap flights from Illinois to Barcelona from $340

The cheapest month to fly to Barcelona-El Prat Airport from Illinois is in February. Flight prices, which tend to average around $481, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of February, then book flights to Barcelona-El Prat Airport from Illinois during January instead. Flights to Barcelona-El Prat Airport in January, while not as cheap as those in February, still average around $564.

The cheapest day to depart on your flight to Barcelona-El Prat Airport is on a Tuesday when prices can be found for as low as $866. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around $1,132. These prices are subject to change though, so be sure to set up a Price Alert for flights to Barcelona-El Prat Airport.

Flying to Barcelona-El Prat Airport from Illinois in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $781 when looking at flights departing in the afternoon. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are $997 on average. Flights to Barcelona-El Prat Airport from Illinois in the evening are generally more expensive because this time of day is more convenient for travelers’ schedules.

Fly from Chicago O'Hare Intl to Barcelona-El Prat for the best Illinois - Barcelona-El Prat flight prices

You are more likely to see cheaper flights to Barcelona-El Prat Airport from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to Barcelona-El Prat Airport for around $808 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Barcelona-El Prat Airport from Illinois for as low as $643 on momondo.

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

JetBlue, British Airways, and SWISS are the most popular carriers operating from Illinois to Barcelona-El Prat

United Airlines, American Airlines and Iberia are the top three most popular airlines that fly to Barcelona-El Prat Airport from Illinois according to our data. United Airlines is the first choice among our users, with 50% of people opting to fly with this airline when traveling to Barcelona-El Prat Airport. Keep in mind that there are 17 different airlines that fly to Barcelona-El Prat Airport on a routine basis, so you have a few additional options to choose from.

The number of flights available between Illinois and Barcelona-El Prat Airport is 4 per day as of October 2026. The most frequent departure time is 9:00PM, with 100% of daily flights leaving in the evening.

As of October 2026, 29 flights take off from Illinois and land in Barcelona-El Prat Airport each week. The most common flight departure day for this route is Wed, with 24% of weekly flights taking off on this day.