Miles earning Classic -> Classic Plus
I have currently around 18000 status miles in M&S and some other trips will push me close to 25000 this summer.
In November I have tickets for a J RT trip ARN-IST-DFW.
How does the "status level upgrade" work out? If the first leg pushes me other to Classic Plus, will I get the higher earning from the next legs of that trip - or does the "level upgrade" occur only after all the legs are flown?