https://stubhub.community/t5/Suggestions-and-Feedback/%F0%9D%9F%AD-%F0%9D%9F%B4%F0%9D%9F%B2%F0%9D%9F%B2-%F0%9D%9F%B3%F0%9D%9F%AF%F0%9D%9F%B4-%F0%9D%9F%AC%F0%9D%9F%B3%F0%9D%9F%AC%F0%9D%9F%B5-What-days-are-Frontier-flights-the-cheapest/m-p/266993#M10466