Yes, HawaiianMiles does have an expiration policy. HawaiianMiles can expire if there is no activity on the account for a period of 18 months. This means that if a member does not earn or redeem any miles within that timeframe, the miles may be forfeited. To maintain the validity of the miles, members can engage in various activities, such as taking a flight with Hawaiian Airlines, earning miles through partners, or redeeming miles for rewards. It is also important to note that miles earned through purchases, promotions, or other activities may have different expiration rules. Members are encouraged to regularly check their account activity and consider how to keep their miles active. For the most accurate and updated information regarding the expiration policy and potential exceptions, it is advisable to refer to the current web page dedicated to HawaiianMiles.