
Tara Hanlon, 30, from Leeds in northern England, was attempting to board a flight to Dubai on Saturday when she was stopped.
Officers searched her suitcases and found the huge cash haul, the largest detection at a UK border so far in 2020.
Britain’s immigration compliance minister Chris Philp said that stopping the export of undeclared cash from the UK was a vital step in clamping down on organised crime gangs.
Hanlon appeared at Uxbridge Magistrates Court on Monday and was remanded in custody until Nov 5.
A 28-year-old woman from Doncaster in northern England who was arrested at the same time has been released under investigation, the statement said.