Helen Reid had been missing from her home in Aviemore.
Irene Marandola, 79, who has dementia, left Kintyre House, in the early hours of Sunday morning.
Highlands and Islands Airport Limited (HIAL) confirmed ballot had resulted in "overwhelming acceptance".
James Paton was last seen driving not far from his home in Kiltarlity, around 1.30pm on Monday.
Gregor McIntosh, 16, died after the Vauxhall Corsa he was a passenger in was involved in a collision on the A9.
A 16-year-old boy, who was a passenger in one of the vehicles, was taken to hospital, where he died because of his injuries.