Honeybee workers (the ones who sting): 7 to 8 mph. Wasps, including yellow jackets and hornets: very variable from species to species, but the fastest up to 30 mph. Average horsefly: 18 mph. Hybomitra hinei, a small Canadian horsefly: over 40 mph. Mosquito: up to 2 mph. Housefly: 3 mph. Dragonflies: up to 27 mph.