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

Return flights

08 Apr - 19 Apr	Icelandair
23 Apr - 08 May	Icelandair
28 Apr - 05 May	Icelandair
01 Apr - 13 Apr	Spirit Airlines
15 Apr - 06 May	Icelandair
18 Apr - 03 May	Icelandair
25 Apr - 09 May	Icelandair
30 Apr - 15 May	Spirit Airlines
30 Apr - 09 May	Spirit Airlines
22 Apr - 28 Apr	TAP
16 Apr - 19 Apr	Spirit Airlines
01 Apr - 12 Apr	Spirit Airlines
02 Apr - 16 Apr	Spirit Airlines
17 Apr - 27 Apr	SWISS
02 Apr - 12 Apr	Spirit Airlines
10 Apr - 12 Apr	Icelandair
01 Apr - 08 Apr	Spirit 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 421€

Return flights