How to Block Air tickets in Jetairways or Qatarairways?`

By Wings Of Fire •
Hi can any one tell me if i can BLOCK the tickets online?
Also how much i need to pay while blocking and how many days before the travel i have to pay them?
Appreciate your help.
Kindly put the links for the web sites where i can block the tickets, i have been searching allot over net but cudnt fined any helpful info.
Thanks once again.
You can only block it with a ticketing deadline with a travel agent.
Online is instant purchase...