A man has been arrested at Sydney Airport over a car crash near Cooma that claimed the lives of the two people last week.

Key points: Sagar Bhattarai, 22, was arrested at Sydney Airport on Friday evening

Sagar Bhattarai, 22, was arrested at Sydney Airport on Friday evening He was charged over a crash near Cooma on July 28 that claimed two lives

He was charged over a crash near Cooma on July 28 that claimed two lives Two other passengers were injured in the crash

NSW Police said the driver of the car, 22-year-old Nepalese national Sagar Bhattarai, was stopped at the airport on Friday night while trying to leave the country and charged with multiple offences.

Five people were travelling in the vehicle when it left the road and rolled near Rose Valley Road, Bunyan, about 3:40am on Sunday, July 28.

A 21-year-old male and a 22-year-old female died at the scene.

Police described the scene as "horrendous" and said it was surprising the three survivors had not been more seriously injured.

Two of the passengers, aged 19 and 20, suffered superficial head lacerations.

Mr Bhattarai also suffered a serious head laceration and was flown to Canberra Hospital with one of the other injured passengers for treatment.

He was arrested at Sydney Airport following a week-long investigation and taken to Mascot Police Station where he was charged with two counts of dangerous driving occasioning death, among other offences.

He was refused bail and will remain in custody until his next court appearance on September 27.