(1) on AS, maintain MVPG status because they waive the change fee even within 60 days
(2) hope for a schedule change of >60-90 min or a change of operating carrier; this generally allows for either a full refund or a one-time change (individual airline policy may limit the change to travel on the same route/date, but may give some flexibility such as alternate airport or +/- one day)
(3) hope for weather disruption or other IROPS conditions which also frequently give a lot of leeway in terms of refund or re-routing
(4) otherwise book refundable tix