Colin Farrell & Son James Fly Home

Colin Farrell carries his young son James, 3 1/2, through LAX airport on Friday afternoon in Los Angeles, Calif.

Last weekend, the Irish actor made a trip out to Las Vegas with his girlfriend of six months, Muireann McDonnell, a medical student from Dublin.

Colin, 31, and Muireann, 22, were spotted smooching in their hotel pool on and dined at Morton’s steakhouse. The couple also caught the Cirque du Soleil shows O and Love.

He also recently wrapped the drama Pride and Glory with Edward Norton.

10+ pictures inside of Colin and his son James…