From 2005 to 2008, a ferry route operated between Mõntu harbour and the Latvian port of Ventspils. There were plans to re-launch the route with financial support from Saaremaa Municipality and the Freeport of Ventspils. Preparations for the launch began in 2017, but as of 2020 no potential operator with a suitable vessel had shown interest in operating the service.
M/S Scania operated between Mõntu harbour and Ventspils from 2005 to 2008