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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

Popular routes and flight deals