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

Return flights

13 May - 20 May	Icelandair
09 May - 16 May	Icelandair
05 May - 12 May	British Airways
05 May - 12 May	Finnair	direct
10 May - 19 May	Iberia	direct
10 May - 21 May	Finnair	direct
12 May - 19 May	Air Canada
10 May - 18 May	Icelandair
19 May - 24 May	Icelandair
19 May - 26 May	Air Canada
20 May - 03 Jun	Aer Lingus
27 May - 03 Jun	TAP
26 May - 01 Jun	Aer Lingus
18 May - 15 Jun	SWISS
25 May - 24 Jun	Aer Lingus
27 May - 10 Jun	Spirit Airlines
28 May - 25 Jun	Aer Lingus
28 May - 25 Jun	British Airways	direct

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 410€

Return flights