It does not matter how far MWH or PDX are to AMS. The plane flew to SEA and *then* diverted.
I suspect the reason the plane diverted to MWH rather than PDX is because the pilot waited until the last second to make a decision, and prevailing winds meant that MWH was possible but not PDX.
They gambled on getting in and out of MWH before crew time expires (not much time left considering they lost an hour on departure), and they lost the bet. Next time don't cut it so close!
I suspect the reason the plane diverted to MWH rather than PDX is because the pilot waited until the last second to make a decision, and prevailing winds meant that MWH was possible but not PDX.
They gambled on getting in and out of MWH before crew time expires (not much time left considering they lost an hour on departure), and they lost the bet. Next time don't cut it so close!