The best day to arrive at Riyadh is Thursday and it would be best to avoid Friday, as prices are on average 135.84% higher than on Thursday. (Average prices, based on 200600 datapoints.)
MondayUS $ 284
Mon
TuesdayUS $ 260
Tue
WednesdayUS $ 374
Wed
ThursdayUS $ 182
Thu
FridayUS $ 430
Fri
SaturdayUS $ 220
Sat
SundayUS $ 218
Sun
Analyse direct flights between Riyadh and Abu Dhabi.