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

Return flights

04 May - 10 May	Delta
02 May - 10 May	Delta
03 May - 16 May	Delta
06 May - 18 May	Delta
03 May - 17 May	Delta
06 May - 29 May	Delta
18 May - 13 Jun	Virgin Atlantic
07 May - 29 May	Delta
07 May - 28 May	Delta
15 May - 06 Jun	Virgin Atlantic
25 May - 20 Jun	Virgin Atlantic

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

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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Cheapest return flights from Chicago to London in May from 515€

Return flights