I will make for the first time a silver once I finish my outbound IAD-DEN-OGG.

Statistically - what are my chances of making it into E+ on way back? Or even securing an UDU into Domestic first on way back? Esp. for SFO-IAD leg which will be a red-eye. If it helps - I am flying back Dec. 26th.

Also - is there any chance of requesting and securing silver benefit before actually completing outbound travel?