I'm French and am gonna travel soon from Madrid, Spain to Montevideo, Uruguay with the Spanish air company Iberia. I know that some companies require from their costumers to show a proof of the return flight to board (usually a return ticket). Does Iberia do that ? I browsed through their Website but could not find anything about it.
Timatic, the system used by airlines, does not mention an onward/return ticket as a requirement to enter Uruguay https://www.timaticweb2.com/integration/external-result/oV86E3KXwm4lOgxIrBb7gW3B2UAa