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

Return flights

15 Apr - 22 Apr	Icelandair
08 Apr - 15 Apr	Air Canada
15 Apr - 30 Apr	Air Canada
08 Apr - 13 Apr	Air Canada
23 Apr - 30 Apr	Icelandair
08 Apr - 17 Apr	Air Canada
16 Apr - 23 Apr	Icelandair
12 Apr - 20 Apr	Icelandair
10 Apr - 15 Apr	Icelandair
02 Apr - 11 Apr	Icelandair
29 Apr - 10 May	Icelandair
22 Apr - 05 May	Icelandair
23 Apr - 02 May	Icelandair
29 Apr - 11 May	Spirit Airlines
21 Apr - 08 May	Spirit Airlines
27 Apr - 01 May	SWISS
28 Apr - 02 May	SWISS
25 Apr - 04 May	SWISS

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 378€

Return flights