Dubai to Malé is about 1,630 nautical miles and roughly four and a half hours non-stop, comfortably within range of a midsize aircraft and upwards. It is one of the shortest routes to a genuinely remote destination, which is why it is flown privately far more often than the distance alone would suggest.
Private jet charter from Dubai to Maldives starts from $26,500 on the smallest suitable aircraft. That is an indicative starting price, not a quote: the figure for your trip depends on which aircraft are available, where they are positioned and the date you fly.