Thank you all.

I have one more query. My mom is returning alone. In Delhi, there is 10:40 hrs of transit. So, does she have to recheck in luggage from DEL to KTM. Does she have to pay any custom charges at DEL airport if she has any electronic items?

A travel agent told us we may have to pay custom at Delhi and recheck in luggage. Is it right? By the way, she will have AA/Air India/Indian Airline from US to KTM.