If you want to reach Kumarakom via the dreamy waterways of Kerala then the most reasonable option is to take a houseboat from Muhamma, a town near Alleppey.
The nearest airport is Kochi International Airport. You can hire private taxis and cabs from the airport.
The best route is to take a bus from Kottayam.
The nearest railway station is Kottayam, located about 14 kms from Kumarakom. You can hire private taxis and cabs from the railway station to reach Kumarakom.