And if you thought flight numbers are complicated, wait until you see what is in the future for PNR codes: https://www.iata.org/en/programs/airline-distributio

And if you thought flight numbers are complicated, wait until you see what is in the future for PNR codes: https://www.iata.org/en/programs/airline-distribution/retailing/one-order/ https://www.iata.org/en/programs/airline-distribution/retail...