Cheapest return flights from London to Chicago in August from $479

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

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

Return flights

23 Aug - 10 Sep Icelandair
21 Aug - 10 Sep Icelandair
29 Aug - 07 Sep Icelandair
20 Aug - 10 Sep Icelandair
18 Aug - 10 Sep Icelandair
30 Aug - 13 Sep Icelandair
26 Aug - 17 Sep Icelandair
31 Aug - 17 Sep Icelandair
29 Aug - 08 Sep Icelandair
31 Aug - 17 Sep Iberia direct
25 Aug - 31 Aug Scandinavian Airlines
27 Aug - 31 Aug British Airways
24 Aug - 31 Aug Scandinavian Airlines
21 Aug - 25 Aug TAP
23 Aug - 28 Aug TAP
18 Aug - 26 Aug Icelandair
21 Aug - 27 Aug Icelandair
19 Aug - 26 Aug Scandinavian Airlines
18 Aug - 30 Aug Icelandair
19 Aug - 24 Aug Icelandair

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