Mamta, It really depends upon what time of the year you are planning to go. If you are thinking of winter around Dec-Jan and/or summer around Jun/Jul/Aug then certainly you need to pay more than 1500, unless you block the tickets earlier. If you are thinking of going this winter in or around december then you should be looking to pay more than 2000 that too if you are lucky enough to get the ticket!! I am not scaring you but this is the situation.This winter has gone really bad for some reason. Anyways here are some of the agents that I have been in touch with for my own trip: AP Travel: Phone: (301) 431 1120. Himalayan Travel: Phone: 510-222-5307 HTH Good luck!!