Greens senator Sarah Hanson-Young has spent almost a million dollars in travel entitlements, according to a report.

The prominent South Australian's costs included $85,000 to attend environmental summits and to visit Syrian refugee camps, News Corp reported on Friday morning.

From the time of her appointment in 2008 until December 2014, the senator reportedly claimed a total of around $970,000 in travel expenses.

Senator Hanson-Young is pictured meeting Syrian refugees on an overseas study tour to a Syrian refugee camp in Jordan in January 2014

From her appointment in 2008 until December last year, Ms Hanson-Young has claimed $970,000 in travel entitlements

The report said the sum included her travel allowance, family costs, car costs, domestic fares and charter and overseas claims.

Ms Hanson-Young has consistently updated her social media accounts with pictures of her various study trips overseas, including a January 2014 trip to refugee camps in Lebanon and Jordan.

She posted a picture of herself smiling with several children at a camp in Jordan, writing: 'Many more (refugees) in Syria and can't get out'.

In a report to Parliament, the senator said the aim of that journey was to assess the scale of the humanitarian crisis.

Ms Hanson-Young is a prominent advocate on behalf of the rights of refugees. She is pictured here addressing a rally concerning the rights of the Tibetan people

She found the Australian government needs to contribute more funding to vital services in camps overseas, such as sewerage systems.

Other countries Ms Hanson-Young reportedly claimed travel entitlements to visit included Papua New Guinea, Indonesia, Denmark, Sweden and Greece.