Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE AIRLINES (Airline VARCHAR, uid VARCHAR)
TABLE: CREATE TABLE FLIGHTS (Airline VARCHAR, SourceAirport VARCHAR)

### Question ###
What are airlines that have some flight departing from airport 'AHD'?

### Accurate SQL ###

SELECT T1.Airline FROM AIRLINES AS T1 JOIN FLIGHTS AS T2 ON T1.uid = T2.Airline WHERE T2.SourceAirport = "AHD"