The look on Cameron's face when he walks towards the airplane for the first time; he just looks so happy to be finally going home.
Cameron's growing bond with Guard Bishop, beginning with him showing her the photo of his daughter Casie, to which she warmly tells him "Now that there is a walking talking reason for you to be a better human being." Her respect for him grows with his valiant efforts to assist in apprehending the Jailbird hijackers while simultaneoulsy trying to save Baby-O from his imminent diabetic seizure, culminating in Cameron saving her from Johnny 23's bestial lust. She even warmly jokes: "Poe? Next time, take the bus" as they part in friendship. And knowing the kind gentleman Cameron has demonstrated himself to be, he would more than likely check up on how her life is afterwards with letters.
Garland Greene, who has a kill count higher than any other convict on the plane and is reputed to have worn a girl's head as a hat through three states, has a tea party while alone with a little girl, a nice talk and does nothing remotely evil to her and even waves goodbye when running/flying away.
The guy even talks about his condition with her. The fact that he can admit he's messed up is impressive in and of itself.
"Just so's you know, Marshal Larkin, there's now three men I trust."
In a weird way, it's actually sweet how all the convicts tend to dote on Sally-Can't-Dance, even wolf whistling when they see her in a dress. If she's actually trans they also have no issue using feminine pronouns.
Cameron's reunion with his wife and daughter. Remember, this is the first time he's ever met his daughter too. The tearful look on Nicolas Cage's face during the scene truly sells the Tears of Joy this scene is full of.
