Cheapest return flights from Chicago to London in May from $748

Best time to book flights for Chicago (MDW) to London (LGW) flights at AirHint

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

Return flights

24 May - 31 May Porter Airlines (Canada) Ltd
24 May - 04 Jun Porter Airlines (Canada) Ltd
23 May - 01 Jun Porter Airlines (Canada) Ltd
23 May - 08 Jun Porter Airlines (Canada) Ltd
26 May - 30 May Porter Airlines (Canada) Ltd
12 May - 31 May Frontier Airlines
25 May - 08 Jun Porter Airlines (Canada) Ltd
26 May - 08 Jun Porter Airlines (Canada) Ltd
23 May - 20 Jun Porter Airlines (Canada) Ltd
24 May - 20 Jun Porter Airlines (Canada) Ltd
27 May - 08 Jun Porter Airlines (Canada) Ltd
24 May - 08 Jun Porter Airlines (Canada) Ltd
24 May - 06 Jun Porter Airlines (Canada) Ltd
22 May - 30 May Porter Airlines (Canada) Ltd
16 May - 31 May Porter Airlines (Canada) Ltd
24 May - 27 May Porter Airlines (Canada) Ltd
15 May - 19 May Frontier Airlines

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

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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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