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Popular flights and flight offers from Chicago to London

ORD – LHR
Chicago - London
Mon 22 Sep 2025 – Tue 30 Sep 2025
From
520 USD

Our cheapest flights from Chicago to London

ORD – LHR
Chicago - London
Mon 22 Sep 2025 – Tue 30 Sep 2025
From
520 USD

Popular routes and flight deals