Cheap Train tickets to Frondenberg/Ruhr

What are the most popular routes to Frondenberg/Ruhr?

Bonn - Frondenberg/RuhrAverage priceCZK 1,620Average duration2h 31mDaily departures6
Duisburg - Frondenberg/RuhrAverage priceCZK 620Average duration1h 17mDaily departures4
Munich - Frondenberg/RuhrAverage priceCZK 4,340Average duration6h 39mDaily departures5