To save up to 39% on this flight, we recommend booking at least 61 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Chicago Midway Airport to London Heathrow Airport from $704 1-2 weeks out and tickets from $810 for flights departing within the next 72 hours.
Our data shows that April tends to be the cheapest month to fly to London Heathrow Airport from Chicago Midway Airport. Users have commonly found prices around $590 for the month, but tickets can be as low as $386. Due to multiple factors, prepare for potentially higher prices in December.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Chicago Midway Airport to London Heathrow Airport as you normally would.