E-cigarettes are electronic products, the use of which may be restricted by the laws and regulations of various countries.
Therefore, if you are planning to fly from the US to India, it is recommended that you consult the relevant national laws to determine whether e-cigarettes are allowed and how they are regulated.
Generally speaking, any electronic cigarette and its accessories and components should comply with the legal regulations and requirements of the exporting country, including the need to obtain authorization or licenses.
At the same time, no matter which country you are in, you need to abide by local environmental protection regulations and social safety regulations when using electronic cigarettes.
In short, before using and carrying e-cigarettes, it is recommended that you understand relevant legal regulations, policies and norms to ensure legal product flow and use.