Most common mode of treatment for laryngomalacia is -
In most patients laryngomalacia is a self-limiting condition.
Treatment of laryngomalacia is reassurance to the parents and early antibiotic therapy for upper respiratory tract infections.
Tracheostomy is required only in severe respiratory obstruction.
Surgical intervention (supraglottoplasty i.e. reduction of redundant laryngeal mucosa) is indicated for 10% of patients. Main indications for surgery are:

Severe stridor
Apnea
Failure to thrive
Pulmonary hypertension
Cor pulmonale.
Reassurance
Medical
Surgery
Wait & Watch