£315 - £614
Travelling from most locations, it is best to book your flight to Chicago during the month of February for the best deal, although there are other times of the year which offer great deals as well.
On average, from most locations, when planning your trip to Chicago, try to book your flight in the region of 60 days in advance for the cheapest prices.
From most locations, the cheapest flights to Chicago are found on a Thursday. Booking a Sunday departure is usually the most expensive.
In general, when looking for the cheapest flight to Chicago, our data indicates that evening flights are the most cost-effective. midday flights tend to be the most expensive.