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

Return flights

10 Apr - 12 Apr	Scandinavian Airlines
17 Apr - 19 Apr	Scandinavian Airlines
30 Apr - 07 May	Icelandair
15 Apr - 09 May	Icelandair
09 Apr - 16 Apr	Icelandair
07 Apr - 13 Apr	Icelandair
24 Apr - 16 May	Icelandair
23 Apr - 16 May	Icelandair
06 Apr - 02 May	Icelandair
10 Apr - 18 Apr	Icelandair
15 Apr - 24 Apr	Icelandair
09 Apr - 13 Apr	Icelandair
29 Apr - 23 May	Icelandair
27 Apr - 11 May	Icelandair
01 Apr - 25 Apr	Icelandair
21 Apr - 16 May	Icelandair
22 Apr - 16 May	Icelandair
29 Apr - 05 May	Icelandair
12 Apr - 19 Apr	Icelandair
02 Apr - 11 Apr	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 $520

Return flights