The closure of the Sydney monorail will provide a greater legacy than the 25 years it spent circling the city, the NSW government says.

State transport minister Gladys Berejiklian hopes nostalgic commuters embarking on one last hurrah will help raise $50,000 for children's charities.

"Every single dollar that people pay during the last weekend of June will be donated to five children's charities," the minister announced on Monday.

Camp Quality, CanTeen, Make-A-Wish Australia, Youth off the Streets as well as the Children's Hospital at Westmead are slated to receive $10,000 each from all ticket sales during June 29-30.

Ms Berejiklian said since the closure of the 3.6 kilometre track was announced last year, ticket sales have increased.

"While the monorail no longer has a purpose from a public transport perspective, there is a lot of nostalgia associated with the monorail taking its final ride," she said.

In anticipation of increased commuters, only single loop tickets will be sold during the last weekend, instead of the usual $5 unlimited ticket.

A public ballot will also be held for the monorail's final journey on Sunday, June 30 at 9.30pm, Ms Berejiklian said.

Once the monorail is finished, the state government will finalise its tender process to dismantle the track beginning in August.

Over 90 per cent of the monorail's 1500 tonnes of steel will be recycled, and two carriages preserved.

 

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