For comparison have a turboprop!
SAAB 2000: 1st hour about 1000kg, subsequent hours 900kg.
Therefore 1 hour flight = 1000kg
2* 1 hour flights = 2000kg
But 1* 2hr flight = 1900kg
Burn holding for departure = 400kg/hr
Hope this helps?
Climb profile= 240kts then Mach 0.50
Cruise= Mach 0.62
Descent Profile Mach 0.62 then IAS 275 Then IAS 250 Below FL100
Engines are AE2100E's