Lenroy Jackson, 27, was arrested early this morning in Toronto.
Police said he had purchased a one-way ticket to Jamaica and was scheduled to depart at 5 p.m. this afternoon. He was scheduled to appear at a courtroom in Old City Hall this morning.
Jackson is facing multiple charges, including attempted murder.
Earlier this week, police released a security video showing two suspects as they entered the bank, busy with customers, near St. Clair Avenue West and Jane Street on Sunday afternoon.
On Tuesday, Toronto police Staff Insp. Mike Earl told reporters they had arrested a man believed to be the robber who is seen in surveillance video jumping over the counter at the bank.
Andre Palmer, 26, was taken into custody Monday night in Brampton, Ont. He faces several charges including robbery while armed with a firearm, attempted murder, aggravated assault and two counts of possession of stolen property.
Police have said that during the robbery, a customer was shot for not complying fast enough with one of the robber's demands.
The bullet ended up hitting a 22-year-old bank employee in the leg.
Security footage shows the same customer attempting to tackle one of the robbers as he jumped back over the bank counter.
When the robbers retreated from the bank, the customer chased them into the parking lot where he was shot in the abdomen. The man underwent surgery on Monday.
The bank employee had a bullet removed from her thigh.