The difference lies in the physicality and delivery of the travel document. An eTicket (Electronic Ticket) is a digital entry in the airline or railway's reservation system. You don't "possess" the ticket in a physical sense; instead, you have a confirmation code (PNR). You can check in online, use a mobile boarding pass, or print it at home. In 2026, eTickets are the global standard for 99% of air travel. An I-Ticket (Internet Ticket) is a term most commonly used by Indian Railways (IRCTC). Unlike an eTicket, which you can print yourself and use as valid travel authority with an ID, an I-Ticket is a physical, high-security ticket that is delivered to your home via courier after you book it online. You cannot simply print an I-Ticket at home; you must have the original physical document sent by the railway to board the train. While I-Tickets have become less common as eTicketing technology has improved, they were traditionally used for those who wanted a "traditional" paper ticket without needing to visit a station counter, whereas eTickets have now replaced them for almost all modern rail and air commuters.