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

Return flights

10 Apr - 24 Apr	Icelandair
16 Apr - 23 Apr	Icelandair
02 Apr - 09 Apr	Icelandair
01 Apr - 05 Apr	Icelandair
10 Apr - 24 Apr	British Airways	direct
16 Apr - 23 Apr	British Airways	direct
01 Apr - 05 Apr	British Airways	direct
02 Apr - 09 Apr	British Airways	direct

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 526€

Return flights