Cheapest return flights from London to Chicago in March from $632

Best time to book flights for London (LHR) to Chicago (ORD) flights at AirHint

AirHint found the following cheapest return flights from London (LHR) to Chicago (ORD) in March 2026 (see full year).

Return flights

19 Mar - 22 Mar Scandinavian Airlines
21 Mar - 24 Mar LOT
02 Mar - 02 Mar LOT
09 Mar - 12 Mar Air Canada

Also check the deals for one-way flights from London to Chicago in March.

Skyscanner

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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