US Airways Adding First-Class to 110 Planes CheapOair Staff April 8, 2011 general US Airways Going First-Class Friday, US Airways announced they’ll be adding first-class seating to 110 of their regional fleet that only had economy seats prior. Only planes that have more than 70 seats will receive the first-class cabins. The airline is predicted to spend $35 million on the upgrades. It will also force each of the jets receiving the upgrade to lose three to eight seats. Source: USA Today