Cheapest return flights from Chicago to London in May from 581€

Best time to book flights for Chicago (ORD) to London (LHR) flights at AirHint

AirHint found the following cheapest return flights from Chicago (ORD) to London (LHR) in May 2025 (see full year).

Return flights

04 May - 08 May TAP
04 May - 22 May Aer Lingus
05 May - 16 May Finnair
11 May - 20 May Finnair
06 May - 13 May Finnair
16 May - 18 May Scandinavian Airlines
07 May - 12 May Icelandair
01 May - 09 May Finnair
20 May - 02 Jun Icelandair
01 May - 15 May Finnair
04 May - 11 May Aer Lingus
21 May - 03 Jun Air Canada
20 May - 10 Jun Aer Lingus
21 May - 02 Jun SWISS
20 May - 02 Jun British Airways direct
29 May - 07 Jun Aer Lingus
31 May - 07 Jun Aer Lingus
20 May - 10 Jun Iberia direct
25 May - 04 Jun Aer Lingus
28 May - 03 Jun Aer Lingus

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

Skyscanner

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.

Book a cheap hotel in London

Cheap car rent in London