The best day to arrive at Christchurch is Wednesday and it would be best to avoid Monday, as prices are on average 237.95% higher than on Wednesday. (Average prices, based on 415713 datapoints.)
MondayPHP 12.028
Mon
TuesdayPHP 8.961
Tue
WednesdayPHP 3.559
Wed
ThursdayPHP 8.724
Thu
FridayPHP 8.058
Fri
SaturdayPHP 9.962
Sat
SundayPHP 11.805
Sun
Analyse direct flights between Christchurch and Auckland.