Small air bubbles can be propelled through a liquid by a sound field. This paper presents observed and calculated values of the translational velocities at which bubbles smaller than resonance size are propelled through a standing acoustic wave in water and isopropyl alcohol. Bubble radii ranged from 29 to 149 μ, acoustic-pressure amplitudes ranged up to 1.1 bar, and the frequencies ranged from 23.6 to 28.3 kHz. The resulting bubble velocities, ranging to 23 cm/sec, were measured by photographing a moving bubble under stroboscopic illumination. Experiment and theory are in agreement as long as the bubble translation is rectilinear. Experimental results also indicate that the bubble translation becomes erratic when the pressure amplitude exceeds a threshold value. This threshold appears to be identical to the threshold for a similar onset of erratic dancing by bubbles that are trapped without translational motion in the sound field.