solat...umrah journey

i was calculating the number of solat that we should perform while travelling by air, especially the time when we performed umrah( thats the furtherest distance for most...like me). Assuming departing from KLIA TO MEDINA starting at 3.00pm (zohor prayer) plus 8 hours of travelling .so arriving at around 11pm malaysia which is around 6pm madina (maghrib prayer). THUS, my travel circles around zohor, asar, maghrib or maybe plus insya'. HOWEVER, when departing from JEDDAH to KLIA, starting at 11 pm( isya' prayer according to jeddah time) plus 8 hours of travelling. so arriving at around 7 a.m jeddah which is around 12pm malaysia ( nearly zohor prayer). THUS my travel circles around isya', and subuh. maybe after immigration and collecting luggage , it would come to zohor. To know when to perform the solat, i did manually like watching the sun, nevertheless they said we can ask the stewardess to inform us....this sounds nice. correct me if i am wrong......