Cheapest return flights from Chicago to London in May from $521

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

Return flights

06 May - 14 May Icelandair
02 May - 11 May Icelandair
07 May - 14 May Icelandair
01 May - 12 May Icelandair
04 May - 11 May Icelandair
08 May - 18 May Icelandair
08 May - 19 May Icelandair
06 May - 11 May Icelandair
08 May - 16 May Icelandair
01 May - 05 May Icelandair
13 May - 01 Jun Icelandair
05 May - 16 Jun Icelandair
05 May - 05 Jun Icelandair
20 May - 11 Jun Icelandair
15 May - 02 Jun Icelandair
04 May - 04 Jun Icelandair
19 May - 11 Jun Icelandair
20 May - 01 Jun Icelandair
05 May - 05 Jun British Airways direct
13 May - 02 Jun United

Also check the deals for one-way flights from Chicago to London in May.

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