Flight Time from Chicago to London

At the moment, you can catch a nonstop flight from Chicago to London with the following airlines, including: United Airlines British Airways Norse Atlantic Airways Frontier Airlines Brussels Airlines Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.

It takes around 7 hours 55 minutes to fly from Chicago (CHI) to London (LON).

By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Chicago to London is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

Based on Trip.com data in the past 4 weeks, there is 61 flight per week flying from Chicago to London. You can check the weekly schedule for popular airlines on this route below: Austrian Airlines: S/M/T/W/T/F/S -- OS7854 (00:48) Air Canada: S/M/T/W/T/F/S -- AC5368 (00:48)

The cheapest months to fly from Chicago to London is October, when demand for travel is lower.

After crunching the numbers on our December flight calendar, it's currently cheapest to fly from Chicago to London on December 7, 2025 with Icelandair, with prices starting at HK$3,829.

You can land at any one of the following hubs in London, with O'Hare International Airport to Heathrow Airport (ORD-LHR) is by far the most common option on this route: Heathrow Airport (LHR) London Gatwick Airport (LGW) London City Airport (LCY) London Luton Airport (LTN) London Stansted Airport (STN) London Southend Airport (SEN).

The time difference between London and Chicago is 6h.

Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.