I don't know if there is any meat to this rumor, but it is interesting...
The rumor mill is working overtime spreading wild stories about Virgin America purchasing Frontier. We have also been asked whether Frontier and AirTran are talking. We have no idea if there is any truth to these tall tales ...
http://www.thebeat.travel/blog/node/138
I guess that would be one way to open new routes

. What kind of aircraft do Frontier fly? What routes do they serve?