The best day to arrive at Phnom Penh is Friday and it would be best to avoid Tuesday, as prices are on average 98.46% higher than on Friday. (Average prices, based on 146065 datapoints.)
MondayUS $ 156
Mon
TuesdayUS $ 227
Tue
WednesdayUS $ 218
Wed
ThursdayUS $ 163
Thu
FridayUS $ 115
Fri
SaturdayUS $ 119
Sat
SundayUS $ 134
Sun
Analyse direct flights between Phnom Penh and Ho Chi Minh City.