National Transport Commission operates a bus from Ella to Colombo hourly. Tickets cost $1 - $3 and the journey takes 6 h 40 min. Alternatively, Sri Lanka Railways operates a train from Ella to Colombo 3 times a day. Tickets cost $1 - $6 and the journey takes 9 h 34 min.
From Ella taxi to Bandarawela then bus to Pettah CTB. 6 h 52 min Rs. 2238. From Elle train to Colombo Fort. 9 h 34 min Rs. 638. From Ella taxi to Colombo. 3 h 20 min Rs. 15644. From Ella drive to Colombo. 3 h 20 min Rs. 2935. From Ella taxi to Katugastota airport, fly to Diyawanna Oya airport, then taxi to Colombo. 3 h 7 min Rs. 34945.
Yes, there is a direct train departing from Elle and arriving at Colombo Fort. Services depart 3 times a day, and operate every day. The journey takes approximately 9½ hours.