Can be done, you need:
- An existing or fictional ICAO waypoint code.
- Check touch ‘n go (TNG) for that WP (the AI plane performs TNGs from the time it initially arrives in the vicinity of the WP until its scheduled arrival time).
- Next leg DEP time has to be within 10 min of the ETA of the current leg so the AI plane will not land but instead will fly on to the next destination (I use 4 minutes).
In the Flightplans text file example leg below, the AI departs from RAF Wattisham EGUW at 08:30, flies to the (MAIW) Holbeach bombing range EGY1, does touch 'n goes there till the WP ETA (08:55), it does not land because DEP time is 4 minutes later (08:59) and then returns to RAF Wattisham EGUW:
AC#1,F6,1%,24Hr,VFR,08:30,TNG08:55,015,F,0021,EGY1,08:59,09:24,015,F,0021,EGUW
Be aware that AI Flight Planner 2 will give warnings "Departure scheduled before or very close to arrival time of previous leg" but you can ignore those.