A foreign national who intends to enter the United States for a short duration or transiting through the airport to another country is required to obtain a C1 Transit Visa is a nonimmigrant visa for US

US Transit Visa is generally required for the following purposes:-

A foreign national traveling to another country who will have a brief layover in the United States
A passenger embarking from a foreign port on a ship which is travelling to another country, other than the United States, but at the time of the journey, the ship makes port in the United States with no objective of landing in the United States.
A crewmember traveling to the United States as a passenger to join a ship or aircraft mostly issued a combination C-1/D visa.
A foreign citizen proceeding in immediate and continuous transit through the United States to or from the United Nations Headquarters District, needs to have a diplomatic transit (C-2) visa. Travel within the United States will be restricted to the New York City and nearby places.

Applicant’s Document Checklist for USA Transit Visa

Valid Original Passport - Your passport must be valid for at least six months beyond your period of stay in the United States. If more than one person is included in your passport, each person who needs a visa must submit a separate application.
Visa application form
Proof of your onward travel arrangements and/or permission to enter another country after departing the United States
Employment proof

SANCTUM PROCESS for USA TRANSIT Visa

Filling the Application Forms.
Customizing Document Checklist as per the applicant's case.
Scheduling Appointment with the US Consulate in Preferred Language of your Choice (English, Hindi, Telugu etc.) as per the availability.
Providing required letter formats if necessary.
Helping with the list of probable printed question for USA Visa Interview.
Paying the US visa fee at the Bank
Scheduling Appointment with the US Consulate in Preferred Dates and Language of your Choice (English, Hindi, Telugu etc) with 3 times reschedule options.
Preparing the complete travel Itinerary if necessary.
Mock Interview preparation with options of face to face at our office premises or though telephone or Skype calls.
Authorization letter formats to collect passports.

USA Transit VISA

USA Visitor Visa