Colombia's Avianca is one of the world's oldest ____ (8)

I believe the answer is:

airlines

(Other definitions for airlines that I've seen before include "Companies providing regular plane travel" , "Rain isle (anag.)" , "They transport people around the world" , "Aer Lingus, Ryanair etc." , "They provide scheduled flights for passengers" .)

I've seen this clue in The Times.

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