A woman has been arrested in Darwin after allegedly attempting to conceal the drug ice in chocolate wrappers.

NT Police Superintendent Kris Evans said a 46-year-old woman was arrested at Darwin Airport as she disembarked a flight from Sydney on Saturday.

"Upon a search of the woman's luggage, police located 500 grams of methamphetamine (also known as ice) concealed in chocolate wrappers," Superintendent Evans said.

The woman has been charged with supply methamphetamine in a commercial quantity, possess methamphetamine in a commercial quantity and possess thing to administer a dangerous drug.

A second arrest was made as a 57-year-old woman attempted to board a flight to Sydney at Darwin Airport on Tuesday.

"Police located $55,000 [cash] in her possession and subsequently a search warrant was executed at her residence in Rosebery where police located 165 grams of ice," Superintendent Evans said.

The woman has been charged with several offences including supply methamphetamine in a commercial quantity, possess methamphetamine in a commercial quantity and conspire to commit a crime with another.

Following these arrests, New South Wales Police executed a search warrant at a residence in Rhodes.

Superintendent Evans said police found "1,000 grams of an amphetamine-type stimulant suspected to be methamphetamine, and a quantity of suspected precursor" at the Rhodes address.

In total the seizures of methamphetamine had a street value of more than $2 million.

Police will allege both women were involved in a highly organised syndicate transporting methamphetamine into the Northern Territory.

"We are extremely pleased with the result of this investigation," Superintendent Evans said.

"Methamphetamine is a destructive drug that destroys the lives of the vulnerable and the loved ones around them."