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

Return flights

22 Apr - 26 Apr	TAP
12 Apr - 18 Apr	TAP
22 Apr - 01 May	TAP
29 Apr - 16 May	TAP
25 Apr - 01 May	TAP
22 Apr - 28 Apr	Icelandair
21 Apr - 29 Apr	Icelandair
05 Apr - 15 Apr	Icelandair
10 Apr - 20 Apr	Icelandair
14 Apr - 21 Apr	Icelandair
09 Apr - 15 Apr	Icelandair
16 Apr - 19 Apr	Icelandair
17 Apr - 23 Apr	Icelandair
22 Apr - 05 May	Icelandair
28 Apr - 05 May	Icelandair
22 Apr - 02 May	Icelandair
23 Apr - 02 May	Icelandair
26 Apr - 11 May	Icelandair
15 Apr - 06 May	Icelandair
23 Apr - 01 May	Icelandair

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 $439

Return flights