Without knowing the date of the tag (airline was founded in 1955, tag could date as late as '70s, by the look of it), this appears to be a bastardized version of Avant Garde. Didn't find anything with the curiously square-off R and P, but the following may be helpful:
http://www.myfonts.com/fonts/itc/avant-garde-gothic/std-bold/
http://www.myfonts.com/fonts/font-fabric/solomon/black-99953/
http://www.myfonts.com/fonts/mostardesign/sofia-pro/semi-bold/
