Search and book Chicago to London flights
Popular flights and flight offers from Chicago to London
ORD – LHR
Chicago - London
Tue 19 Aug 2025 – Thu 28 Aug 2025
From
495 USD Our cheapest flights from Chicago to London
ORD – LHR
Chicago - London
Tue 19 Aug 2025 – Thu 28 Aug 2025
From
495 USD