Begin your search for low-cost Delta Airlines flights by going to the airline's website and selecting the appropriate booking option. Fill in your departure and arrival dates and timings after selecting a one-way or round trip. The passenger's age must now be selected by clicking on the passenger's description. Before using the flight search option on the same page, double-check that all travelers' names are included. Choose Delta Flights Booking book after you've compared the two. Once you are done with it, proceed further.