AirHint found the following cheapest return flights from Chicago (ORD) to London (LHR) in July 2026 (see full year).

Return flights

21 Jul - 20 Aug	Finnair	direct
21 Jul - 20 Aug	KLM
31 Jul - 11 Aug	British Airways
06 Jul - 13 Jul	ITA Airways
20 Jul - 27 Jul	ITA Airways
15 Jul - 19 Jul	ITA Airways
26 Jul - 05 Aug	Aer Lingus
13 Jul - 22 Jul	ITA Airways
23 Jul - 28 Jul	ITA Airways
16 Jul - 28 Jul	ITA Airways
21 Jul - 25 Jul	ITA Airways
10 Jul - 19 Jul	ITA Airways
21 Jul - 02 Aug	ITA Airways
14 Jul - 20 Jul	ITA Airways
28 Jul - 04 Aug	Aer Lingus
15 Jul - 21 Jul	Aer Lingus
17 Jul - 07 Aug	Aer Lingus
16 Jul - 02 Aug	ITA Airways
30 Jul - 04 Aug	TAP
10 Jul - 07 Aug	Aer Lingus

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

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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Cheapest return flights from Chicago to London in July from $608

Return flights