Boeing 787 Dreamliner or the Boeing 777 costs hundreds of millions of dollars. Having it grounded for many hours means losing money.
Aviation Sector
That’s why airlines try to keep their aircraft flying for as many hours as possible each day.
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Air Fleet
Aeronautical Technology
Air Routes
The ideal schedule is usually this:
Night flight from the Americas to Europe.
Brief grounding.
Daytime return to the Americas.
This way, the aircraft remains operational almost constantly.
Sleep Disorders
Furthermore, models like the Boeing 787 were specifically designed to reduce