Cheapest one-way flights from Chicago to London in May from $311

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

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

One-Way flights

11 May Frontier Airlines
12 May Porter Airlines (Canada) Ltd
25 May Porter Airlines (Canada) Ltd
28 May Porter Airlines (Canada) Ltd
08 May Frontier Airlines
09 May Porter Airlines (Canada) Ltd
23 May Porter Airlines (Canada) Ltd
19 May Frontier Airlines
15 May Frontier Airlines
26 May Porter Airlines (Canada) Ltd

Also check the deals for return 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.

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