Online ticketing site Viagogo said it had seen an increase in the number of people who had put their seats up for sale in the wake of the singer's late appearance.
The firm said it had seen a 48% rise in listings for his tickets this morning, many trading for less than half the box office price.
Viagogo spokesman Ed Parkinson said: "It seems that parents with younger children have been frightened off by the chance of their kids being kept up beyond their bedtimes, or missing the last trains home."
Justin Bieber's visit to London has included illness, a late appearance and now fisticuffs after the pop star lashed out at a photographer.
Justin Bieber apologised to his young fans and their furious parents today after he turned up late for his concert last night.
Justin Bieber angered fans by showing up nearly two hours late for his London concert last night - but he's not the first musician to do so.