Frontier Airlines (2nd) (Denver) will add summer seasonal service to Jackson Hole (Jackson), WY from May 14, 2010 through September 12, 2010. The route will be operated by sister airline Republic Airlines (2nd) (Indianapolis) using its 99-seat Embraer ERJ 190s (so far being operated in Midwest Airlines colors).

Press release:

finance.yahoo.com/news/Frontier-Airlines-Returns-to-bw-3708557766.html?x=0&.v=1