I also was thinking about this in running my North America Challenge airline. I don't think saving a route as a draft etc. would work though. The input pages are written in PHP as I understand it, which means sami can make the fields populate based on what is in the URL. By storing this information in the URL, players could then click a link to add the flight as a new bookmark, then when the time is right they can click on their bookmark and have the flight info already populated.
For example, if you wanted to open a route everyday from ATL to ORD at 1200 with a 60 minute turnaround with a Dash-8 and no tech stops the URL would be ".../KATL/KORD/-/-/?days=1234567&depart=1200&turn=60&fleet=106" (106 = Dash 8 fleet index #).
Not only would this be easy for sami to implement as it is a few simple $_GET commands to read the URL, but a player could do some serious strategic planning by creating routes for future planes and bookmarking them. I can order 10 aircraft and then create 10 folders in my bookmarks section and put the planned routes in there so when they are delivered I just have to do a few mouse clicks.