Originally Posted by
jonnykanzen
Taxes = carrier imposed charges = profits = all the same to me :-)
LHR - SIN is a mixture of F and J and is an Avios 2-4-1 booking.
SIN - PER is a one way cash booking in Y (BA7378)
PER - SIN is a one way Avios booking in J (QF0077)
They are not the same. They are an important factor in deciding the value an airline offers.