Cheapest return flights from Chicago to London in August from $639

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

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

Return flights

13 Aug - 27 Aug Icelandair
20 Aug - 01 Sep Icelandair
15 Aug - 25 Aug Icelandair
18 Aug - 26 Aug Icelandair
12 Aug - 19 Aug Icelandair
24 Aug - 31 Aug Icelandair
13 Aug - 31 Aug Icelandair
17 Aug - 23 Aug Icelandair
21 Aug - 02 Sep Icelandair
29 Aug - 06 Sep TAP
30 Aug - 06 Sep TAP
02 Aug - 17 Aug Icelandair
01 Aug - 12 Aug Icelandair
29 Aug - 03 Sep Icelandair
08 Aug - 17 Aug TAP
28 Aug - 04 Sep Icelandair

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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