Concerning fuel transport it all depends what kind of aircraft you are flying
B747: 4000 NM Coef transport around 1.500
However A330 on the same distance is around 1.330.
There is a good formula for small airplane like 320 737 .
That is roughly tenth of the air distance.
i.e 2000 NM on A320 is 1.200
500 NM = 1.050 etc.........