Cheapest return flights from Chicago to London in August from 647€

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

16 Aug - 25 Aug Air Canada
10 Aug - 24 Aug Air Canada
24 Aug - 31 Aug United
21 Aug - 05 Sep Finnair direct
22 Aug - 04 Sep Finnair direct
10 Aug - 24 Aug Finnair direct
16 Aug - 25 Aug British Airways direct
06 Aug - 18 Aug SWISS
07 Aug - 11 Aug TAP
08 Aug - 11 Aug TAP
24 Aug - 31 Aug United direct
03 Aug - 10 Aug United

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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