Cheapest one-way flights from Chicago to Barcelona in September from 315€

Best time to book flights for Chicago (ORD) to Barcelona (BCN) flights at AirHint

AirHint found the following cheapest one-way flights from Chicago (ORD) to Barcelona (BCN) in September 2025 (see full year).

One-Way flights

30 Sep Icelandair
10 Sep Turkish Airlines
20 Sep Icelandair
13 Sep Air Serbia
12 Sep TAP
20 Sep United direct
10 Sep British Airways direct
13 Sep British Airways direct
12 Sep United direct

Also check the deals for return flights from Chicago to Barcelona in September.

Skyscanner

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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