Yes, flirting during Ramadan is generally considered haram (forbidden).
While conversations with others are permissible for single individuals, engaging in flirtatious behavior is discouraged as it can lead to more intimate interactions that violate the spirit and requirements of fasting. Ramadan is a time for increased devotion, self-restraint, and spiritual reflection. Flirting contradicts these principles by inciting desires and potentially leading to actions that invalidate the fast or are otherwise inappropriate during this holy month.
The focus during Ramadan should be on purifying one's intentions and actions, drawing closer to Allah, and abstaining from anything that could distract from these goals. Flirting, with its inherent focus on worldly desires and potential for inappropriate interactions, falls into that category. Therefore, Muslims are encouraged to avoid flirtatious behavior during Ramadan and instead concentrate on virtuous conduct and spiritual growth.