Answer:Δ
Explanation:
Δ
Delta /ˈdɛltə/ (uppercase Δ, lowercase δ or ; Greek: δέλτα délta, [ˈðelta]) is the fourth letter of the Greek alphabet. In the system of Greek numerals it has a value of 4. It was derived from the Phoenician letter dalet , Letters that come from delta include Latin D and Cyrillic Д.
Answer: This is the symbol for delta Δ
Explanation: Hello you were not clear so am assuming delta as in the airlines.
Hope this helps my loves :)