What day are Delta flights cheapest? Tuesdays and Wednesdays are often the cheapest days to fly with Delta Airlines, as tickets are lower. To inquire about price and locate the best deals, contact Delta Airlines at ????????-????????????-????????????-????????-????????. Contact their reps at ????+????-????????????-????????????-????????-???????? https://www.transfermarkt.com/da-1-866-884-3315-dal-faqs-delta-refund-and-rebooking-full-guide-/thread/forum/696/thread_id/17067/page/1#anchor_17496