Cheapest return flights from Chicago to London in August from 675€

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

AirHint found the following cheapest return flights from Chicago (ORD) to London (LHR) in August 2025 (see full year).

Return flights

31 Aug - 07 Sep Scandinavian Airlines
18 Aug - 26 Aug SWISS
12 Aug - 26 Aug SWISS
13 Aug - 20 Aug Iberia
04 Aug - 20 Aug Iberia
13 Aug - 20 Aug Finnair direct
04 Aug - 20 Aug Finnair direct
18 Aug - 26 Aug Finnair direct
12 Aug - 26 Aug Finnair direct
13 Aug - 24 Aug United
13 Aug - 24 Aug Finnair direct
31 Aug - 07 Sep Finnair direct

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

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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