We help you find cheap flights by searching thousands of routes, across hundreds of airlines, so that you can easily compare the prices. Icelandair is normally the cheapest airline for flying from London Heathrow to Chicago O'hare International Airport. But we recommend that you check all possible airlines, to be sure of getting a great deal.
The most popular airlines to fly with are Air Canada, Finnair & British Airways, but they're not always the cheapest. If you want a bargain, try widening your search to include other airports in Chicago and more flights. Generally, flights are cheapest in January, when it's low season
There are 665 direct and indirect flights between London Heathrow and Chicago O'hare International Airport every week, but the prices vary throughout the year. You can expect prices for both flights and accommodation to be much higher in Chicago during peak season. So, if you're planning to go during the holidays, it's best to book well in advance.
Today, we've gone through 19,227 flights across the globe, to help you find a bargain. Did you know you can compare accommodation prices too? If you need somewhere to stay in Chicago, take a look at our hotel options to get an idea of prices.
