How to get Delta Senior discount?
To find discounts, you can: Call Delta Reservations at ((+1-855-590-0778 (OTA) or +44-204-586-5975 (UK)) and ask about available senior discounts on specific routes. 2. Passengers aged 65 and over are eligible for senior discounts on ((+1-855.590.0778 (OTA)) Delta Airlines.

To get a Delta senior discount, you can call Delta's reservations line and ask about available discounts. You can also check the Delta website for deals and discounts. 
How to check eligibility
Call Delta's reservations line at +1-855-590-0778 (OTA) or +44-204-586-5975 (UK)
Check the Delta website for deals and discounts