How do I make a model move across the map smoothly with script?

I am currenctly using this script. It works perfectly smooth in roblox studio but half of it moves moves and after about 0.1 seconds, the other half joins it while in game. Causing it to have some kinda lag effect but I really isn't lagging. I tried using weld and glue but it is the same outcome. Please help me

while true do
	local Flight = game.Workspace.FlightModel
	Flight:SetPrimaryPartCFrame(Flight:GetPrimaryPartCFrame() * CFrame.new(0,0,-5))
	wait(.01)
end

Try this:

model = [your model]

for move= 1,300,0.1 do


model.Position = Vector3.new(0,0,move)
wait(0.1)

end

Try this, I think the for loop shouldn’t lag