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 local oldAirbase = ScenEdit_GetUnit({side='Cuba',name='Holguin Airfield'}) --Get the data of the single airbase unit
 local side = VP_GetSide({side='Cuba'}) --create a list of all units and items associated with that side
 local counter, aircraftTable = 0, {} --initialise a counter and prepare a table
 for k,v in ipairs(side.units) do --go through the list of all units and items created above
     local aircraft = ScenEdit_GetUnit({guid=v.guid}) --get the unit info of each unit on that side
     if aircraft.type == 'Aircraft' and aircraft.base.name == oldAirbase.name then --pick out aircraft that have the old base as their designated base (can be in the air or on the ground)
         counter = counter + 1 --increase counter if a unit matches the criteria
         aircraftTable[counter] = aircraft --add that unit to the table in a sequential order
     end
 end
 
 local oldAirbase = ScenEdit_SetUnit({guid=oldAirbase.guid,newname=oldAirbase.name..' Old'}) --change the name of the old airbase 
 ScenEdit_ImportInst('Cuba', '/CWDB Cuba/Holguin AB 1960.inst') --import the inst file unit
 local newAirbase = ScenEdit_GetUnit({side='Cuba',name='Holguin Airfield'}) ---get the data from the generated group (make sure you know the name of the group, for best effect make sure it is named the same as the single unit airport)
 for k,v in ipairs(aircraftTable) do --go through the list of aircraft that matched criteria
     local aircraft = ScenEdit_SetUnit({guid=v.guid,base=newAirbase.guid}) --get each aircrafts individual data
     if aircraft.altitude ~= oldAirbase.altitude then --if the aircraft isn't at the same altitude as its old base (then it's probably flying)
         ScenEdit_SetUnit({guid=v.guid,base=newAirbase.guid})--assign it to the new base without teleporting it there. When it hits RTB is will land at the new base.
     else --if the aircraft IS at the altitude of its old base, it's probably on the ground
         ScenEdit_HostUnitToParent({HostedUnitNameOrID=v.guid,SelectedHostNameOrID=newAirbase.guid})--teleport it to the new base
     end
 end
 
 ScenEdit_DeleteUnit({guid=oldAirbase.guid}) --delete the old base.
 --by apache85; feel free to use, pick apart, whatever. Enjoy!