Cheap Bus tickets to Moscow, US

What are the most popular routes to Moscow?

Seattle - MoscowAverage price₪215Average duration8h 5mDaily departures3
Pullman - MoscowAverage price₪61Average duration25mDaily departures3
Spokane - MoscowAverage price₪75Average duration1h 50mDaily departures1
Kansas City - MoscowAverage price₪459Average duration1d 15hDaily departures5
Ellensburg - MoscowAverage price₪171Average duration8h 15mDaily departures4