Search and book Chicago to London flights
Popular flights and flight offers from Chicago to London
ORD – LHR
Chicago - London
Sun 5 Apr 2026 – Wed 15 Apr 2026
From
640 USD Our cheapest flights from Chicago to London
ORD – LHR
Chicago - London
Sun 5 Apr 2026 – Wed 15 Apr 2026
From
640 USD