Cheapest return flights from Chicago to London in August from $632

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

13 Aug - 27 Aug Finnair
25 Aug - 03 Sep Iberia direct
25 Aug - 02 Sep Iberia direct
19 Aug - 02 Sep Iberia direct
13 Aug - 27 Aug Iberia direct
12 Aug - 02 Sep Iberia direct
13 Aug - 02 Sep Iberia direct
25 Aug - 10 Sep British Airways
25 Aug - 10 Sep Iberia direct
05 Aug - 19 Aug Iberia direct
04 Aug - 02 Sep British Airways direct
12 Aug - 26 Aug Iberia direct
10 Aug - 19 Aug Iberia
10 Aug - 19 Aug Iberia direct
25 Aug - 01 Sep British Airways
25 Aug - 01 Sep Iberia direct
21 Aug - 28 Aug Iberia
06 Aug - 20 Aug British Airways
06 Aug - 18 Aug British Airways
21 Aug - 28 Aug Iberia 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.

Book a cheap hotel in London

Cheap car rent in London