Low-cost US carrier Frontier is to expand its network with the addition of 22 new routes. The network expansion will cover 23 airports across the US, with the airline expanding operations at airports such as Boston Logan International (BOS), Denver International (DEN), Los Angeles International (LAX), and Miami International (MIA). “Whether consumers are looking to lounge under a palm tree, ski through fresh powder, or explore some of the country’s top metropolitan areas, this expansion of our network offers exciting options at an unmatched value,” said Josh Flyr, vice president of network and operations design, Frontier Airlines. “From the West