Passenger train services returned to Cambodia in 2016 with weekend trains from Phnom Penh to Kampot and Sihanoukville. Royal Railways runs trains in either direction, departing Phnom Penh or Sihanoukville at 7am on both Saturday and Sunday. Phnom Penh to Sihanoukville is US$7, taking nine hours. Phnom Penh to Kampot is US$6, taking five hours.
There are also evening services on Friday/Saturday/Sunday from Phnom Penh and a morning service from Sihanoukville to Phnom Penh on Monday morning.