What is the average travel speed of a flight from JFK to LAX
[IN:GET_ESTIMATED_DURATION What is the average travel speed of a [SL:METHOD_TRAVEL flight ] from [SL:SOURCE [IN:GET_LOCATION [SL:POINT_ON_MAP JFK ] ] ] to [SL:DESTINATION [IN:GET_LOCATION [SL:POINT_ON_MAP LAX ] ] ] ]