the fuel alone just to get there will cost minimum 50k

then you have landing / ramp fees for both scotland and vegas then you have crew costs,

because it will be more than a 12 hour flight also the plane will have to change crew somewhere on the way also so thats 2 lots of crew costs plus maybe more landing fees

a lot of a scheduled flights money is made in first and business class thats why the e class is cheapish, to get to vegas in 1st youre talking minimum 3k

hope this helps

matt