Sihanoukville to Phnom Penh - VIP Bus Sihanoukville Cambodia to Phnom Penh is a shared shuttle service from Sihanoukville to Phnom Penh. Travel from Sihanoukville to Phnom Penh is fast and convenient via the Expressway route. The transfer will be conducted via the Expressway and may only accommodate small no of passengers per ride (usually below 9). The transfer can be accommodate 2 x luggage per traveler: 1 x Suitcase or Backpack + 1 x Small backpack or Hand bag. Our experienced crew will be there to make your journey safe and comfortable. Once the reservation is confirmed, your spot is 100% guaranteed.