Rescheduling a flight in 2026 is almost always possible, but the cost depends entirely on your fare class and the timing of the change. Most major airlines have maintained the "no change fee" policies for standard economy and premium tickets introduced years ago, meaning you only pay the difference in fare. However, "Basic Economy" tickets remain the most rigid, often being completely non-changeable or requiring a steep penalty. A significant update for 2026 comes from the DGCA and other regulators, which now mandate a 48-hour "look-in" window for direct bookings; this allows you to amend or cancel a flight for free within two days of booking, provided the departure is at least 7 to 15 days away. If you need to reschedule due to a medical emergency, many airlines will now waive fees if provided with a valid doctor's certificate.