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

Return flights

16 Apr - 21 Apr	Icelandair
15 Apr - 22 Apr	Icelandair
12 Apr - 20 Apr	Icelandair
24 Apr - 28 Apr	Icelandair
15 Apr - 20 Apr	Icelandair
21 Apr - 06 May	Icelandair
24 Apr - 27 Apr	Icelandair
18 Apr - 25 Apr	TAP
12 Apr - 18 Apr	Icelandair
12 Apr - 17 Apr	Icelandair
08 Apr - 13 Apr	Air Canada
17 Apr - 03 May	Icelandair
24 Apr - 02 May	Icelandair
20 Apr - 02 May	Icelandair
26 Apr - 11 May	Icelandair
27 Apr - 11 May	Icelandair
01 Apr - 01 May	Spirit Airlines
15 Apr - 06 May	British Airways
19 Apr - 16 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