Both roads unlikely to open this early , no word yet on the progress of the work on Srinagar-Leh.Lot of late snow , I would bank on a late opening this yeas as well. Last ten years openings here http://korta.nu/slehten . See the sticky on top of this page as well for Manali-Leh.
The only safe option at this time is to book a plane ticket , and keep track of the updates ( see also the sticky on top of this page ) : if ( again : seems highly unlikely ) Srinagar-Leh opens this early you might be able to cancel your flight.
high road to.. 
How to go to Leh in the last week of April
Both roads unlikely to open this early , no word yet on the progress of the work on Srinagar-Leh.Lot of late snow , I would bank on a late opening this yeas as well. Last ten years openings here http://korta.nu/slehten . See the sticky on top of this page as well for Manali-Leh.
The only safe option at this time is to book a plane ticket , and keep track of the updates ( see also the sticky on top of this page ) : if ( again : seems highly unlikely ) Srinagar-Leh opens this early you might be able to cancel your flight.