Did you not see how she faded? That was before he had found her at the hospital in a coma, and before the two of them finished the plane to rescue her. That was a memory of the past. They didn't have any motivation to finish the plane since they all went their separate ways. Thus, they can't meet at their promised place which is beyond the clouds with no vehicle to get there.

Sorry if that sounded...confusing, I just woke up. Read through it a couple of times and it should make sense.