KTT is the new airport for Phnom Penh that opened September 2025, The airport is roughly an hour north of the city. It has a beautiful Plaza Premium Lounge. It is just past security and passport control, up a floor on the second floor. Take an elevator up and walk a bridge over to the lounge. We were flying coach on Air Cambodia so it was really nice to be able to access this lounge. It was beautiful, all tans and creams, lots of comfortable seating as well as tables. It had a lot of food choices though we didn't eat.

Highly recommended.