A "Flexi" ticket (whether for a train, flight, or bus) typically allows you to change your booking anytime up until the departure of your original journey, and sometimes even after if you miss it. For 2026 travelers using services like IRCTC or major airlines, a Flexi ticket usually means you can modify the date, time, or even the destination without paying a "change fee," though you will still be responsible for any difference in the fare price. Some 2026 "Ultra-Flex" tickets even allow changes up to 15 minutes before departure via a mobile app. It is vital to check the specific "Fare Rules" of your ticket, as some "Flexi" fares only allow one free change, while others offer unlimited modifications. If you wait until after the scheduled departure to make a change, the ticket may be treated as a "no-show" unless your specific policy includes a "missed connection" or "late arrival" clause.