The Length of an Airplane Trip (Realistic Math Problem)

Ahmad plans to take a journey with an airplane from Jakarta to Amsterdam through Kuala Lumpur. The following is the itenary ticket he booked:

itenary ticket
(Ticket from Jakarta to Amsterdam)

In case of time differences in those three places, Ahmad found the following illustration:

time diff
(Time differences among 3 cities)

How long will Ahmad take in the airplane during the journey?
(Assume the time he gets in and out agree with his departure and arrival)