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

Return flights

10 May - 20 May	TAP
03 May - 10 May	TAP
02 May - 09 May	TAP
10 May - 20 May	Finnair	direct
12 May - 19 May	United
19 May - 11 Jun	British Airways
18 May - 31 May	Icelandair
11 May - 06 Jun	Lufthansa
19 May - 13 Jun	British Airways
21 May - 04 Jun	United
23 May - 13 Jun	TAP
07 May - 30 May	Icelandair
21 May - 13 Jun	Lufthansa
26 May - 02 Jun	jetBlue
11 May - 06 Jun	Iberia	direct
07 May - 30 May	Iberia	direct
29 May - 30 Jun	WestJet
29 May - 30 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 328€

Return flights