Flights from London to Chicago available from GBP 444*

To find cheap flights from London to Chicago, we recommend being flexible about when you fly as well as which airport you fly from.

We also advise checking our flight deals often and booking your holiday in advance to secure the best price.

The distance from London to Chicago O'Hare International Airport is approximately 3,950 miles (6,352 kilometres). But please note that the actual flight distance may differ based on the specific airline’s route and other factors.

The flight duration from London Heathrow to Chicago O’Hare International Airport (ORD) is roughly 8-9 hours non-stop.

This is the same for passengers flying to Chicago from London Gatwick. Please note that this does not account for any layovers you might have on your route.

The best time to fly to Chicago from London is undoubtedly during spring or autumn. Embrace the city's enchanting transformation seasons as nature simply shows off!

Witness a colourful tapestry of wonderous events, from cherry blossoms in full bloom to autumn foliage painting the city in gorgeous golden hues. Plus, the mild temperatures make strolling through iconic landmarks like Millennium Park and the Magnificent Mile an unforgettable joy.

Passengers flying from London to Chicago with Icelandair can fly from London Heathrow Airport or London Gatwick Airport. Use the flight finder tool above to browse flights from your preferred airport.