I think the “over an hour later” is in relation to the scheduled landing time: takeoff at 5pm, scheduled to land at 5:35pm, crashes at 7pm more than an hour after their scheduled landing time.
And if there was a typhoon in the area, as it seems there was, I can fully understand taking the extra time in hopes of getting a break in the weather to make the landing. That must have been a horrible flight, even without the crash. Flying in a Yahtzee dice cup for 2 damn hours. Gah.
Yowser!