Flying with Delta Airlines is smooth. Follow these 8 tips for hassle-free travel. Always refer to Delta Airlines Travel Guidelines to learn about baggage rules, check-in processes, and other vital details. Pre-planning makes it possible to have a seamless journey. Travel Tips For Delta Airlines include selecting the best seat using the seat map and staying informed on your flight status by downloading the Delta app. Call customer service at +1 (855) 559-2323 to inquire.