Hi are you going for the interview regarding line training or the type rating?
From SAW to istanbul get the bus just located outside the terminal cost only 10 TL.
It will take you to Taksim.
From there Get the funikular, as they call it, is only 1 stop. Then get the tram. Get off at the
last stop.
There you have the metro I would suggest to go to yenibosna and get the taxi to your hotel.
It should take you 3 hrs.
The yenibosna hotel very basic but with free internet and only 50 TL compared to the radisson 60 EUR.
I also suggest to avoid taxi for long journeys as they are not very honest.
From SAW to yenibosna, or near Pegasus headqaurter, they will charge you at least
100 EUR
Good luck