Are there luggage storage facilities at Colombo Airport?

Yes, the Colombo Airport has a dedicated Left Luggage setup, where you can securely put away your baggage for a daily fee. That counter is placed in the outer porch area of the departure terminal, so it is not inside the main flow.

This service works well for travellers with a long layover who want to wander the city without dragging heavy bags around. Any stored luggage goes through X-ray screening, and you will need to show a valid passport along with your flight itinerary before using the facility.