£274 Cheap flights to Chicago O'Hare Intl Airport

There are 4 cabin classes available to choose from on United Kingdom to Chicago O'Hare Intl Airport flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

The cheapest day to depart from United Kingdom to Chicago O'Hare Intl Airport is on a Wednesday. Travellers who choose to depart for Chicago O'Hare Intl Airport on a Wednesday will often find tickets for as low as £696. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to Chicago O'Hare Intl Airport on Sunday is £761.

The cheapest month to fly to Chicago O'Hare Intl Airport from United Kingdom is in February. Flight prices, which tend to average around £528, 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 Chicago O'Hare Intl Airport from United Kingdom during January instead. Flights to Chicago O'Hare Intl Airport in January, while not as cheap as those in February, still average around £553.

The cheapest time of day to fly to Chicago O'Hare Intl Airport is at midday when flights can be purchased for as low as £678. In contrast, the most expensive time of day to depart to Chicago O'Hare Intl Airport is in the afternoon when prices are around £725.

Fly from London Heathrow to Chicago O'Hare Intl for the best United Kingdom - Chicago O'Hare Intl flight prices

You are more likely to see cheaper flights to Chicago O'Hare Intl Airport from United Kingdom when booking weeks ahead of your departure date. In general, you can expect to find flights to Chicago O'Hare Intl Airport for around £676 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago O'Hare Intl Airport from United Kingdom for as low as £602 on momondo.

Aer Lingus, United Airlines, and British Airways are the most popular carriers operating from United Kingdom to Chicago O'Hare Intl

Aer Lingus, British Airways and Icelandair are the top three most popular airlines that fly to Chicago O'Hare Intl Airport from United Kingdom according to our data. Aer Lingus is the first choice among our users, with 38% of people opting to fly with this airline when travelling to Chicago O'Hare Intl Airport. Keep in mind that there are 17 different airlines that fly to Chicago O'Hare Intl Airport on a routine basis, so you have a few additional options to choose from.

On average, it takes 8h 40m to fly from United Kingdom to Chicago O'Hare Intl Airport if you fly out of London Heathrow (the most popular airport in United Kingdom) and into Chicago O'Hare Intl (the most popular airport in Chicago O'Hare Intl Airport). If you’re flying out of Manchester and into Chicago O'Hare Intl, then the flight time is around 12h 35m.

32 flights are operational daily from United Kingdom to Chicago O'Hare Intl Airport as of November 2026. The most popular departure time for this route is 12:00, with 66% of flights per day taking off in the afternoon.