Book last-minute flights on Delta can be a straightforward process, thanks to the airline's user-friendly website and mobile app. Whether you're dealing with an unexpected business trip or a spontaneous getaway, Delta offers a range of options to accommodate your needs. Start by visiting Delta's website or opening their app. Enter your departure and destination cities, select the dates, and choose the "Flexible Dates" option if your schedule allows for some flexibility. This can help you find the best fares. Delta often provides deals on last-minute flights, particularly during off-peak times or when seats need to be filled. Signing up for Delta's SkyMiles program can also be beneficial, as members might receive notifications of special offers and earn miles on their purchases. For additional savings, consider booking a round-trip ticket instead of a one-way flight, as it can sometimes be more cost-effective.