Cheapest return flights from St. Louis to Barcelona in September from 490€

AirHint found the following cheapest return flights from St. Louis (STL) to Barcelona (BCN) in September 2025 (see full year).

Return flights

28 Sep - 21 Oct Air Canada
30 Sep - 07 Oct United
30 Sep - 12 Oct Delta
24 Sep - 01 Oct United
12 Sep - 16 Sep United
22 Sep - 29 Sep United
28 Sep - 05 Oct United
26 Sep - 03 Oct United
19 Sep - 27 Sep United
20 Sep - 27 Sep United
20 Sep - 26 Sep Air Canada

Also check the deals for one-way flights from St. Louis 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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