As the busy summer travel season begins, Frontier Airlines pilots are cautioning customers flying into or out of Syracuse, that the threat of a strike at the airline is a very real possibility if management does not agree to pay pilots more. After 2 years of unproductive negotiations, pilots have asked to be released from federal mediation. If approved, after a 30-day cooling-off period, the pilots could strike. Last year, 100% of the pilot group voted in favor of authorizing a legal strike.