Open the Delta Airlines seat selection window seven days prior to the departure and choose your desired seats. Flying can be an exciting and memorable experience, but choosing the right seat on your Delta Airlines flight can make all the difference Selecting the right seat on your Delta Airlines flight can provide a range of benefits. For example, a comfortable and spacious seat can help you relax and enjoy your flight, while an aisle seat can provide easy access to the restroom and the aisle. Additionally, choosing the right seat can help you avoid certain issues, such as sitting next to a noisy or uncomfortable passenger.