Quoting NY Times, July 11, 1993: Skybus, a fledgling no-frills charter service offering low fares between Florida and the Northeast, stopped flying June 29 amid conflicting reports over unpaid bills. Nevertheless, Skybus said it was grounded only temporarily and would resume service soon.
And this too at the end:
Quoting NY Times, July 11, 1993: Skybus was founded last year by roughly 100 investors, including former Pan Am, Eastern and Midway employees. Using four DC-9's, it offered service from Newark; Chicago; Worcester, Mass., and three Florida cities -- Fort Lauderdale, Orlando and St. Petersburg. Most one-way flights on Skybus cost between $99 and $119, but the passengers paid extra for meals, beverages and check-in baggage.
I guess starting a no-frills airline named "Skybus" is bad luck