Cheapest return flights from Chicago to London in May from 667€

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

08 May - 14 May Frontier Airlines
01 May - 04 May Frontier Airlines
08 May - 11 May Frontier Airlines
08 May - 12 May Frontier Airlines
09 May - 11 May Frontier Airlines
08 May - 18 May Frontier Airlines
11 May - 17 May Porter Airlines (Canada) Ltd

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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