Javier Martin said:jleex88,
I've walked several times from Astorga to Santiago. When alone, 8-9 days. When not, 10 day. So, if you begin walking on 24th, the 2nd you can arrive in 10 days in Santiago. And you have booked your plane on 4th ... so in my opinion you have time enough.
If you begin in Ponferrada you will miss Astorga, Rabanal, Irago Mountain, Manjarin, El Acebo ... buff can't imagine!!