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

Return flights

05 Apr - 25 Apr	Icelandair
10 Apr - 19 Apr	Icelandair
10 Apr - 24 Apr	Icelandair
23 Apr - 28 Apr	Icelandair
10 Apr - 02 May	Icelandair
13 Apr - 21 Apr	Icelandair
23 Apr - 30 Apr	Icelandair
28 Apr - 02 May	Icelandair
27 Apr - 03 May	Icelandair
13 Apr - 09 May	Icelandair
05 Apr - 11 Apr	Icelandair
03 Apr - 12 Apr	Icelandair
01 Apr - 22 Apr	Turkish Airlines

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 $589

Return flights