Cheap flights from the United Kingdom to Chicago from $379

The month of January is another great option to travel to Chicago O'Hare Intl Airport, with average flight prices from United Kingdom averaging around $734.

The cheapest day to depart on your flight to Chicago O'Hare Intl Airport is on a Friday when prices can be found for as low as $899. This is often the case because there is less demand to fly during this day of the week. On the other hand, Sunday is the most expensive day to depart from United Kingdom because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,104.

Flying to Chicago O'Hare Intl Airport from United Kingdom at noon is the least expensive time of day to depart. momondo users have found prices as low as $919 when looking at flights departing at noon. Try not to purchase tickets in the afternoon because they tend to be around $991. Of course, these prices can vary depending on the time of year and what airport you fly to.

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 $893 when searching weeks out. 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 $809 on momondo.

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.

Icelandair, SWISS, and United Airlines are the most popular carriers operating from United Kingdom to Chicago O'Hare Intl

Aer Lingus, British Airways and Lufthansa 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 40% of people opting to fly with this airline when traveling to Chicago O'Hare Intl Airport. Keep in mind that there are 9 different airlines that fly to Chicago O'Hare Intl Airport on a routine basis, so you have a few additional options to choose from.

Historically, on average around 8% of flights between United Kingdom and Chicago have experienced a delay on any given week. The average delay length over the past 12 months has been 179 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights in the early afternoon have, in the past, seen delays more frequently in comparison.

Monday is statistically the day of the week which experiences the fewest number of delays on this flight route. Friday has historically seen more delays on average compared to the rest of the week.

According to our data, United Airlines have had the least number of delays on this route over the last 12 months; with about 5% of their flights experiencing any sort of delay.

As of September 2026, 45 flights take off from United Kingdom and land in Chicago O'Hare Intl Airport each day. The most common flight departure time for this route is 11:00AM, with 59% of daily flights taking off at noon.

As of September 2026, 318 flights take off from United Kingdom and land in Chicago O'Hare Intl Airport each week. The most common flight departure day for this route is Fri, with 14% of weekly flights taking off on this day.