Boxing Day bargain hunters heading for Perth’s new Direct Factory Outlet have caused traffic chaos on the roads - and the closure of the DFO carpark.

The line of traffic is snaking around around Dunreath Drive and back up onto Tonkin Highway.

Seven News Perth is reporting DFO Perth has closed down the carpark because it is already full, causing further traffic congestion.

Main Roads WA issued a warning to drivers, warning them of heavy congestion in the area.

Perth Airport has also issued a warning to anyone flying today, saying those travelling to terminals 3 and 4 could face delays.

Social media users have also taken the time to express their displeasure online.

Traffic was not the only issue facing shoppers today, with major banks and retail giants suffering EFTPOS and gift card system outages.