Search and book Chicago to London flights
Popular flights and flight offers from Chicago to London
ORD – LHR
Chicago - London
Mon 24 Nov 2025 – Wed 3 Dec 2025
From
643 USD Our cheapest flights from Chicago to London
ORD – LHR
Chicago - London
Mon 24 Nov 2025 – Wed 3 Dec 2025
From
643 USD