Hernandez: When it's his shift to watch for the wolves, he decides to go relieve himself. He wanders to the other side of the wreckage and gets attacked and torn apart by the wolves.
Flannery: As the group leaves the wreckage, trekking through the deep snow, Flannery starts to fall behind due to his wounds. When he gets far enough behind from the group, the wolves surround and attack him. Ottway and the rest notice too late and by the time they get to him, he was already dead.
Burke: Starts suffering from Hypoxia early in the film. On the second night the group camps in the forest, Burke goes to sleep and during a blizzard, Ottway tries to wake him up, but he doesn't. So either Burke died in his sleep, or died from the cold while unconscious.
Talget: The group creates a tightrope to shimmy across a large gorge, Talget volunteers to go last. While he is working his way across, he freezes due to his fear of heights. Then his leg gets snagged on the zipper of part of the rope. While trying to get himself loose, the line snaps and he is sent slamming into a large tree and tumbling down the branches. When he finally lands, severely wounded, he sees the image of his daughter standing over him, before the wolves approach and finish him off.
Diaz: Injures his knee after falling out of a tree while trying to rescue Talget. He marches on with Ottway and Hendrick until they reach a river. Diaz stops, ponders for a moment then tells the others he's defeated. He convinces them he wants to stay behind because there's nothing left in the real world for him. They say their goodbyes and part ways. Diaz rests on a log, looking at the beautiful Alaskan scenery and then hears the wolves growling behind him. Diaz repeats "I'm not afraid" and that's the last we see of him. His fate is left ambiguous but it can be assumed he was killed by the wolves.
Hendrick: While he and Ottway are being chased by the wolves, he is sent tumbling into the ice cold river. He is carried downriver until he is stopped by a log, however his foot gets caught between a couple of rocks underwater and he is stuck with his face mere inches from the surface of the water. Ottway tries to save him, but every time he tried to pull Hendrick out, Hendrick would scream, which eventually causes him to drown.