Ethiopian Airlines typically allows passengers to change their flight bookings with varying degrees of flexibility depending on the fare type and ticket conditions. Generally, changes to flights are subject to fees and fare differences, with the possibility of penalties depending on the specific circumstances. Passengers are advised to review the terms and conditions of their ticket for details on change fees, restrictions, and any applicable penalties. It's recommended to contact Ethiopian Airlines directly or visit their official website for the most accurate and up-to-date information regarding Ethiopian airlines flight change policy/ and associated fees.