Frontier pilots overwhelmingly vote to strike amid stalled contract talks, with 99% in favor if an impasse continues.

While the strike authorization does not guarantee a work stoppage, it is a vital tool in negotiations. Frontier pilots' contracts became amendable in January and have been engaged in mediated talks under the Railway Labor Act since then.

Frontier Airlines pilots have voted to strike if their negotiations with managers break down, the union announced on Tuesday. In strike authorization voting, 97% of pilots participated and 99% voted in favor of a strike if necessary,

Pilots with Denver-based Frontier Airlines took the first step toward a possible strike on Tuesday. About 99% of participating pilots voted in favor of a strike if contract negotiations fail.