Search and book Chicago to London flights
Popular flights and flight offers from Chicago to London
ORD – LHR
Chicago - London
Sun 18 Jan 2026 – Tue 27 Jan 2026
From
648 USD Our cheapest flights from Chicago to London
ORD – LHR
Chicago - London
Sun 18 Jan 2026 – Tue 27 Jan 2026
From
648 USD