BBC News - Natalie Lisbona & Will Smale
One strategy to reduce delays is the increased use of high-tech monitoring technology, to help airports and airlines run more efficiently.
Israeli startup, IntellAct, is one such provider. The company says most departure delays are within an airline's control and many stem from so-called turnaround services - the aircraft being cleaned, refuelled and restocked, or luggage being removed and loaded.
Using airport operators and airlines' existing security and observation cameras, IntellAct's artificial intelligence (AI) software system can automatically detect delays in these turnaround services.