https://apistogramma.com/forum/threads/%E3%80%90open-policy%E3%80%91-what-is-the-best-day-to-book-a-delta-vacation.28716/https://apistogramma.com/forum/threads/%E3%80%90open-policy%E3%80%91-what-is-the-best-day-to-book-a-delta-vacation.28716/https://apistogramma.com/forum/threads/%E3%80%90open-policy%E3%80%91-what-is-the-best-day-to-book-a-delta-vacation.28716/