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

Return flights

10 Apr - 17 Apr	TAP
08 Apr - 15 Apr	TAP
22 Apr - 02 May	TAP
21 Apr - 29 Apr	Icelandair
16 Apr - 23 Apr	Icelandair
21 Apr - 28 Apr	Icelandair
23 Apr - 27 Apr	Icelandair
01 Apr - 28 Apr	TAP
14 Apr - 06 May	Icelandair
15 Apr - 06 May	Icelandair
26 Apr - 03 May	Icelandair
30 Apr - 12 May	Icelandair
01 Apr - 28 Apr	Finnair	direct
08 Apr - 12 Apr	TAP
21 Apr - 29 Apr	British Airways	direct
15 Apr - 06 May	British Airways	direct
14 Apr - 06 May	British Airways	direct
26 Apr - 11 May	Aer Lingus
30 Apr - 12 May	British Airways	direct
22 Apr - 02 May	British Airways	direct

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

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 April from 401€

Return flights