Yes, but the aircraft thinks that the WP means that it should land, so it lands then vanishes.
The aircraft lands when it has reached its last WP and has nothing more to do.
If you put your last WP far away in the sea, the aircraft will first go to this WP before coming back to land.
If in the on activation field of this WP, you delete the aircraft, it simply won't have time to go back, it will be deleted when the aircraft reaches this WP. To be sure, you can put 2 WP far away and delete the aircraft on the one before the last.
BTW, Plage remark is very true. You should first be sure that the aircraft doesn't try to get its cargo back, or it won't follow its normal WP
Whis'