An aircraft assistance method for reducing drag on the aircraft. The method includes flying an autonomous aircraft near the aircraft. An optimal position where vortices created by the autonomous aircraft or the aircraft interact with the other aircraft and/or autonomous aircraft to reduce drag and/or increase lift on the aircraft is determined. The autonomous aircraft is positioned in the optimal position. The method may include a landing assistance system with at least one autonomous aircraft configured to provide the aircraft with information regarding a desired position relative to a runway. The at least one autonomous aircraft may be configured to communicate with the aircraft through a processor and/or a display in the aircraft. The autonomous aircraft may be subject to a drone control system for a plurality of drones configured to position the plurality of drones in a formation.