Aviation abbreviation

UNRR

UNRR stands for “unable to approve route requested” (ATC usage). Got a NOTAM full of contractions? Paste it into the decoder.

Related abbreviations

UNUNAUNAPUNAPVUNARUNATNDDUNAVBLUNCCUNCHGUNDLDUNECUNHRD

Source: FAA Order JO 7340.2 Contractions. Not for operational use.