The next, and final, chapter of the Sora no Kiseki manga is now live on Bandai Visual’s website. Chapter 46 is a lengthy one, in comparison to the others- reaching a total of 50 pages.
This will only be available until 10/1, when it will be removed. The only way you will be able to see the final chapter afterwards is to get it in the tankouban that is released on October 10th. (See the calendar to the right.)
There is no word at this time whether or not Shinki Kitsutsuki will be continuing on into Sora no Kiseki SC.