Technically, most "Flexi" or "Flexible" tickets in 2026 allow for unlimited changes, though this comes with specific caveats. While the airline typically waives the "change fee" (the penalty for modifying the flight), you are still responsible for paying any fare difference between your original ticket and the new one. If you move your flight to a peak holiday date, the cost could still be substantial. Some airlines also impose a "processing fee" or a limit on how close to departure you can make a change—usually up to 1 to 24 hours before takeoff. Additionally, most tickets have a maximum validity of 12 months from the original date of purchase; you cannot keep "flexing" a ticket indefinitely into the future. Under new 2026 DGCA and international consumer guidelines, many carriers also offer a "24 to 48-hour look-in window" where even non-flexible tickets can be corrected or changed once for free if an error was made during booking.