This helps me use those 16,500 points I got in my kids accounts during the last promo.
Buy a one-way to destination out of one of their accounts and a one-way return out of the other one. 12,500 / account = 25,000 total.
BUF-LAS for example. 12,500 + $14.00 / tax each way.
Can you not fly YYZ-LAS for the same miles?
One can regularly find BUF-X-LAS for $250-$300 round trip so I think YYZ-LAS (usually $450+) is better find, IF you can find availability