An upgrade to premium economy might sound simple for passengers, but the real answer to the question of cost is that it fundamentally depends. Across the industry, airlines price premium economy ...

Airline cabin classes like premium economy, business, and first class can be confusing and vary significantly between domestic and international flights. On most U.S. domestic flights, "first class" ...

A closer look at the true cost of upgrading to premium economy on major US carriers.

Add Yahoo as a preferred source to see more of our stories on Google. Don't get tricked next time you pay for an airline upgrade, because you might not be getting what you expect. Here's what I mean.