£236 Find Cheap Flights from Chicago to London Heathrow Airport – Compare and Save

Your flight ticket price will generally be cheaper if you fly to London Heathrow Airport on a Monday and more expensive on a Saturday. On your return trip to Chicago, you should consider flying back on a Wednesday, and avoid Sundays for better deals.

The cheapest month for flights from Chicago O'Hare Intl Airport to London Heathrow Airport is January, where tickets cost £483 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is £1,027 and £864 respectively.

No, with an average price for the route of £892, prices are generally cheapest when you fly direct.

To get a below average price on the flight from Chicago O'Hare Intl Airport to London Heathrow Airport, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 13 weeks before departure.

In the past 5 days, the cheapest return tickets from Chicago to London Heathrow Airport were found on Scandinavian Airlines (£531) and Icelandair (£539).

United Airlines connects Chicago to London Heathrow Airport with 21 flights per week. American Airlines also offers 14 flights per week, while British Airways follows with 14 flights per week.

Weekly flights between Chicago and London historically see delays in approximately 23% of cases, with the average delay over the past year being 161 minutes.

Typically, flights leaving in the early afternoon tend to face fewer delays, whereas flights at night have historically encountered delays more often.

Statistically, Tuesday is the day of the week with the fewest delays on this flight route, while Sunday has typically experienced more delays than other days.

Based on our data, American Airlines have experienced the fewest delays on this route in the past 12 months, with only about 22% of their flights encountering any delays.

Dublin (DUB) is the top choice – 35% of KAYAK users who clicked on one-stop flights from Chicago to London Heathrow Airport picked an itinerary connecting there.

Flights via Copenhagen (CPH) offer the most affordable fares, with an average price of £430 for a return.

Consider flying via Dublin (DUB) for the shortest journey. The average one-way travel time for flights connecting there is 10h 31m.

If you prefer a quick connection, Reykjavik (KEF) often has the shortest stopovers from Chicago to London Heathrow Airport, with an average time of 1h 49m.

There are 3 cabin class options for the route. These are Business, Economy and Prem Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

Each day, there are 7 direct flights that take off from Chicago O'Hare Intl Airport and land in London Heathrow Airport, with an average flight time of 8h 00m. The most common departure time is 17:00 and most flights take off in the evening. Each week, there are 49 flights and there are the same number of flights each day (7).