Cheapest return flights from Chicago to London in August from $595

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

19 Aug - 26 Aug Icelandair
19 Aug - 28 Aug Icelandair
27 Aug - 06 Sep Icelandair
25 Aug - 01 Sep Icelandair
26 Aug - 02 Sep Icelandair
27 Aug - 03 Sep Icelandair
23 Aug - 31 Aug Icelandair
04 Aug - 18 Aug Icelandair
19 Aug - 27 Aug Icelandair
14 Aug - 19 Aug Icelandair
27 Aug - 01 Sep Icelandair
12 Aug - 26 Aug Spirit Airlines
01 Aug - 13 Sep Icelandair
19 Aug - 29 Aug Icelandair
20 Aug - 03 Sep Icelandair
16 Aug - 23 Aug Icelandair
21 Aug - 26 Aug Icelandair
27 Aug - 05 Sep Icelandair
26 Aug - 02 Sep Finnair direct
20 Aug - 03 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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