This paper presents a droplet transportation technique with a small droplet-to-electrode area (DEA) ratio on digital microfluidic (DMF) platforms. By applying an ultra-low-frequency (ULF) actuation signal on a tiny droplet, the induced droplet oscillation and displacement can drive the droplet back and forth across the adjacent actuated electrodes. Droplets with a DEA ratio of as low as 0.2 can be effectively transported, rendering it a promising tool for practical precision applications including chemosynthesis, bioanalysis, and drug delivery.