Airlines tickets and insurance
From Immigration Wiki
The first step when intending to travel to the USA, is to get a Visa.
Visit our Visa information page.
Depending on the type of visa you would want to get, documentation you have to carry or your sponsor has to give you and interview premise at the consulate will change.
Purchasing air tickets
Once you have all the documentation and in the process of getting a visa, you can start looking for buy airline tickets. You can get regular ticket either from a travel agent or directly from the airlines.