Cheapest return flights from Chicago to London in August from $621

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

Return flights

11 Aug - 01 Sep Finnair
11 Aug - 26 Aug Air Canada
27 Aug - 04 Sep Scandinavian Airlines
11 Aug - 01 Sep Iberia direct
11 Aug - 26 Aug British Airways direct
13 Aug - 18 Aug SWISS
01 Aug - 08 Aug Air Canada
01 Aug - 08 Aug Brussels Airlines direct

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

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