Plan like this:I have booked flight from new delhi to leh on 13 September i will b there and we r grp of 11 people and our return planned on 23 September from srinagar to new delhi and i was thinking to visit pahalgam too so is it possible or not n one more thng srinagar leh highway there is also a lot of places to visit so pls tell me hw shld i plan my tour
13/9 - Reach Leh, take rest for acclimatization. You can do local siteseeing like Shanti Stupa, Leh Palace etc
14/9 - Cross Khardungla, reach Diskit or Hundar. Night stay at Diskit/Hundar
15/9 - Go to Turtuk. Night stay at Turtuk. En route you can take a small detour to Panamik and back.
16/9 - Back to Leh from Turtuk.
17/9 - Go to Pangong. Night Stay near the lake
18/9 - Come back to Leh
19/9 - Leh to Kargil
20/9 - Kargil to Srinagar
21/9 - Local siteseeing and Pahalgam
22/9 - Local siteseeing and Pahalgam
23/9 - Srinagar to Delhi
I have never been to Pahalgam so not sure what is there to see or how much time is needed to see that place. Just kept last two days. But as per my opinion, you would not like places like Pahalgam after seeing Leh (like you would not enjoy Shimla after seeing Manali - always see Shimla before you visit Manali).
When you come back from LEh to Srinagar, en route visit the Alchi Monastery, and Lamayuru Monastery. That's all. Start early from Kargil next day, and enjoy the route to Drass - its too beautiful. Then you'll cross Jozila Pass, Sonmarg and reach Srinagar. No need to stop at Sonmarg - it's waste of time.