From Aviation Daily:
In an update to Air Wisconsin employees, CEO Geoff Crowley said it would take about a year to transition its flying from United to new partner US Airways. In February, Air Wisconsin subsidiary Eastshore Aviation agreed to invest $125 million in US Airways in a deal that gave the regional carrier an option to fly its 70 CRJs under the US Airways Express banner.
Crowley called the US Airways deal a "significant investment" but said the carrier was willing to make the deal to "uphold our commitment to protect the long-term viability of Air Wisconsin."
Air Wisconsin's CEO also reminded employees of the "position we were placed in by United. In a sense, we were asked to continue our business at rates that would not cover our costs and would have ultimately put Air Wisconsin out of business."