Palace were still in the ascendency after the break, with França whipping a free-kick just over the bar and then going close following a surging run just moments later.
Pierre Sage had chosen to give the likes of George King, David Ozoh and Jesurun Rak-Sakyi some minutes at the break, with World Cup returnees Chris Richards and Daichi Kamada rested for the second-half.
The tempo remained high. The Eagles eventually put clear water between them and Al-Ula when Jaydee Canvot reacted quickly, poking home a loose ball in the penalty area.
Ozoh then sliced an effort when well placed before Sage introduced another trio of changes, with Joél Drakes-Thomas bringing energy to the attack.
The substitutes kept coming thick and fast with Ismaïla Sarr getting his first minutes since the World Cup.
But the constant changes from both sides seemed to affect the rhythm of the contest and there were few chances in the closing stages – Palace holding out for a 3-1 win and finishing in fifth place at the tournament.
The Eagles return to action with a behind-closed-doors friendly against Fulham next Friday.
Palace XI: Benítez (GK), Canvot (Walker-Smith, 76), Richards (Jemide, 46), Sosa (Tomiyasu (T), 60), Cardines (King, 46), Hughes (C) (Doucouré, 60), Devenny (Sarr, 76), Mitchell (Benamar, 76), Kamada (Ozoh, 46), França (Drakes-Thomas, 60), Nketiah (Rak-Sakyi, 46)
Subs: Matthews (GK), Whitworth (GK), Benetton (GK), Adaramola, Esse.