how much time it take to get transit visa
Apply for a U.S. Visa Persons from the countries that qualify for the Visa Waiver Program can transit to the U.S. without the transit visa. An immigration officer at the port of entry can admit a person holding a C-1 transit visa for the duration determined by him/her, but for a maximum duration of 29 days. You must leave the U.S. on the proposed flight or ship of departure, or within 29 days, whichever is earlier.