Cheapest return flights from St. Louis to Barcelona in March from $592

Best time to book flights for St. Louis (STL) to Barcelona (BCN) flights at AirHint

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

Return flights

04 Mar - 11 Mar Air Canada
24 Mar - 09 Apr Delta
26 Mar - 02 Apr United
18 Mar - 25 Mar United
15 Mar - 25 Mar Air Canada
04 Mar - 31 Mar British Airways
03 Mar - 31 Mar British Airways
30 Mar - 06 Apr United
02 Mar - 09 Mar United
28 Mar - 04 Apr United
12 Mar - 19 Mar United
04 Mar - 24 Apr Iberia
04 Mar - 30 Apr Iberia
15 Mar - 24 Mar Air Canada
21 Mar - 25 Mar Scandinavian Airlines
10 Mar - 17 Mar United

Also check the deals for one-way flights from St. Louis to Barcelona in March.

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.

Book a cheap hotel in Barcelona

Cheap car rent in Barcelona