Flame Dash has an instant cast time if it is not used continuously. This effect seems to have a cooldown based on cast speed.
Flame Dash will force the character to move in range of the target location when not targeted using the attack-in-place key (Shift by default).
Flame Dash cannot be supported by 施放迴響輔助 although it is affected by echoing shrine resulting in two fast, individually targeted casts.
The maximum targeting range of Flame Dash is defined by a square rectangle centered around the caster. This means that the actual maximum range will be √2 times as long (roughly 41% longer) dashing diagonally as it would be dashing straight up, down, left or right. Flame Dash and 躍擊 seem to be the only two skills that work this way, all other skills have their max-range defined by a circle as one would expect.
Flame Dash shares a cooldown with other Blink skills.