Https://patch.com/new-york/new-york-city/calendar/event/20250228/9f3ebc6a-ce84-4a73-8730-77c052e05344/faq-helpdsk-what-is-the-cheapest-day-to-book-a-flight-on-delta https://patch.com/new-york/new-york-city/calendar/event/20250228/9f3ebc6a-ce84-4a73-8730-77c052e05344/faq-helpdsk-what-is-the-cheapest-day-to-book-a-flight-on-delta