Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE AIRPORTS (City VARCHAR, AirportCode VARCHAR); CREATE TABLE FLIGHTS (SourceAirport VARCHAR)
### Question:
Which city has most number of departing flights?
### Answer:
SELECT T1.City FROM AIRPORTS AS T1 JOIN FLIGHTS AS T2 ON T1.AirportCode = T2.SourceAirport GROUP BY T1.City ORDER BY COUNT(*) DESC LIMIT 1