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

Return flights

09 May - 21 May	Delta
02 May - 09 May	Delta
04 May - 22 May	Delta
22 May - 31 May	Porter Airlines (Canada) Ltd
18 May - 25 May	Delta
17 May - 30 May	Porter Airlines (Canada) Ltd
31 May - 07 Jun	Porter Airlines (Canada) Ltd
29 May - 07 Jun	Porter Airlines (Canada) Ltd
12 May - 18 May	Virgin Atlantic
27 May - 17 Jun	Virgin Atlantic
06 May - 13 May	Air France
18 May - 07 Jun	Condor
01 May - 04 May	Delta
19 May - 24 May	Condor

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 547€

Return flights