Start searching in search of low-cost Delta Airlines flights by going to the airline's website and choosing the most suitable option for booking. Enter your departure and return dates and timeframes when selecting a round trip or one-way. The age of the passenger must be determined when you click on the name of the passenger's description. Before using the search for flights option, which is also on this page, ensure that all the terms of travelers are in the list. Select a flight after comparing both. After you're finished, you can go further. The next step is to select a different option that will ask you to choose a bank and enter your credit card information. After that, you'll receive a reservation message on your phone once you have paid the entire cost of your ticket.