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Some aircraft used in long-haul flights arrive at the airport daily at 10 am and stay there until 7 pm. Why do the airlines send their planes and make them stay in the airports for more than 9 hours every day?

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closed as too broad by fooot, SMS von der Tann, DeltaLima, Federico, abelenky Mar 7 '16 at 19:45

Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

  • $\begingroup$ Overhaul and inspections and many other reasons. $\endgroup$ – SMS von der Tann Mar 7 '16 at 18:03
  • $\begingroup$ Local curfew can prevent a long haul flight from departing because the flight must arrive at the destination outside the curfew period. $\endgroup$ – Mike Sowsun Mar 8 '16 at 5:50
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There are many reasons. At least one is that the airline may not need that airframe type until later that day (the next flight that requires said airframe). Airlines don't just fly any plane they have on any route they have, this would be terribly inefficient and involve using an airplane that is not needed for a given mission. Take any major airline for example that fly large planes to lots of destination in Europe. Lets say that they have a 777 Arrive at EWR from Paris. The next long haul flight that airline has out of EWR is that evening to Dublin. But though out the day the carrier has 2 commuter flights down to Charlottesville VA totaling about 100 passengers between the two flights. They are not going to use a 777 to move 100 people and some light bags, so the plane sits until its needed again.

All planes (even non commercial) are built for a given "mission" much like you would not buy a Ferrari if you wanted a car that was good on gas.

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