Angkor Admission
"Even if the price has increased (and as I said, I’d almost bet money that is has) you are probably better off purchasing the three-day pass, rather than a one-day ticket. The worst-case scenario is that you visit only once and you’re out the premium you paid. But again, I doubt this will be the case — you will definitely be able to find enjoyment in the outer reaches of the temple complex."

Admission Pass
You must possess an admission pass (an 'Angkor Pass') to visit the temples and sites in the Angkor Archaeological Park. Passes may be purchased at the main
entrance on the road to Angkor Wat. One-day tickets only can be purchased at the secondary tollgate on airport road entrance near Angkor Wat and at Banteay Srey.
Visitors to Angkor Wat will be asked to pay almost twice as much for admission from February 2016, the Cambodian government has said.
The price of a single-day ticket to the sprawling temple complex will rise from $20 (£15) to $37 (£28), a three-day pass from $40 (£31) to $62 (£48) and a seven-day ticket from $60 (£46) to $72 (£55). No explanation was given for the increase.
The government added that $2 from each ticket sold would be donated to the Kantha Bopha Foundation, a Swiss-run children’s hospital that offers free medical treatment.

Visiting hours are 5:00AM - 6:00PM. Angkor Wat closes at 6:00PM, Banteay Srey closes at 5:00PM and Kbal Spean at 3:00PM. Always carry your ticket. It will be
checked upon each park entry and at major temples.
There is a significant fine for not possessing a valid ticket inside the park.
A regular admission ticket is not required to visit Phnom Kulen, Koh Ker or Beng Melea, but there is a separate entrance fee of $20, $10 and $5, respectively.