To move a fleet, you have 2 choices
-After you decide where to send it, by the destination astro, you have a link Move fleet here. Just click it, a list will open, pick the fleet you want to move, and click Move button *
-You copy the astro coordinate (i.e. A00.55.55.20) that you want to send your fleet, go to the Fleets page, click on the Move link next to the fleet, paste the astro coordinate on the Destination field, and click the Move button
* The first option is available to Premium account only.