A new and distinct cultivar of Chrysanthemum plant named ‘;DLFBAV1’;, characterized by its upright plant habit; vigorous growth habit; dark green-colored leaves; uniform flowering habit; strong upright flowering stems typically grown as a disbud-type with one inflorescence per lateral branch; large decorative-type inflorescences with white-colored ray florets; excellent postproduction longevity; and tolerance to low and high temperatures.