If the attacker retreats and there is no more CV for the planes involved in the defense, all defending figs get one movement point to escape to friendly territory or SZ (if there is a carrier with capacity handy). Since Hawaii is US/Allied control, both the US fig and the Brit fig can land there.
The same would apply in any other cases - say germans attack allied fleet in north sea protected by US planes. If CV is sunk then germans retreat, US planes could escape to UK (or any other adjacent allied territory) on germany’s turn.