One of the best ways to get in the upgrade game—and overnight:
You don’t need to be sitting on a mountain of earned miles to upgrade to Business or First Class cheaply. You can buy them instead. Most airlines sell miles, and cheaply when they put them on sale, which is often.
The one HURDLE WHEN BUYING MILES
There’s often a limit to the number of miles you can purchase. And since miles aren’t transferable from one mileage account to another for free—yes, you can gift miles (or share them) to someone else, usually at a fee of about 1¢, but even these miles come with a limit—you can be caught short.