As Fort Lauderdale-based Spirit Airlines flies into Chapter 11 Bankruptcy protection seeking to change its business model, the United States two non-bankrupt largest Ultra-low cost carriers, Allegiant and Frontier are adding many routes from Florida.

Allegiant:

Destin-Fort Walton Beach to Akron/Canton/Washington-Dulles

Fort Lauderdale to Columbia SC/Huntington WV

Jacksonville to Akron/Canton/Grand Rapids

Orlando-Sanford to Columbia SC

Punta Gorda to Chattanooga

Sarasota/Bradenton to Albany, NY/Elmira, NY/Greenville-Spartanburg/Knoxville/Lexington/Moline, IL, Roanoke

St Peterbsurg/Clearwater to Colorado Springs

Frontier:

Tampa to Houston-Bush/Indianapolis/Milwaukee

Orlando to Austin/Los Angeles/Oklahoma City

Additionally good news for Tampa fliers as Delta will make its newly restored Amsterdam service year-round and WestJet will begin new nonstops to Vancouver next year.