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

Return flights

21 May - 29 May	Porter Airlines (Canada) Ltd
06 May - 13 May	Delta
21 May - 25 May	Air Transat
12 May - 25 May	Porter Airlines (Canada) Ltd
31 May - 16 Jun	Delta
09 May - 16 May	Delta
31 May - 09 Jun	Porter Airlines (Canada) Ltd
03 May - 13 May	Porter Airlines (Canada) Ltd

Also check the deals for one-way flights from Chicago to Barcelona 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 Barcelona in May from $769

Return flights