Flint was elected to the Australian House of Representatives for the seat of Boothby in 2016, replacing retiring MP Andrew Southcott, who had held the seat since 1996. During her first term, Flint raised awareness in Parliament for endometriosis, with the government allocation $2.5 million to researchers for finding new ways of detecting and treating the disease. In 2017, Flint bought 400 copies of a book published by the Menzies Research Centre, a Liberal Party think tank, spending $5818, more than any other politician spent on publications between July 2017 and June 2018, despite the book being available online for free. During the 2018 Liberal Party leadership spills, Flint was one of 43 party members to sign a petition calling for Prime Minister Malcolm Turnbull to call for a second leadership spill.
2019 election
In April 2018, the Australian Electoral Commission rearranged the electoral boundaries of South Australia to reduce the number of seats from 11 to 10, in accordance with South Australia's shrinking percentage of the Australian population. The changes to the seat of Boothby resulted in Flint's 2016 margin of 3.5% shrinking to 2.8%. After the redistribution, Boothby was the only marginal seat in the state, making it a target for the Australian Labor Party in the 2019 Australian federal election. Flint was also a target of the progressive activist group GetUp, who labelled her South Australia's "most backwards politician". Days before the election, Flint's campaign office was vandalised with offensive graffiti. She faced further harassment during the campaign, with a man cautioned for allegedly stalking her and her office also being egged. The race was too close to call on the night of the election, but Flint was eventually declared the winner of the election despite a swing against her. Following the election, Flint accused GetUp and Unions of being responsible for harassment, intimidation and stalking against her during the campaign, and Prime Minister Scott Morrison labelled the actions as misogynistic and bullying.
Hunting and fishing advocacy
Some of Flint's columns expressed her support for recreational and commercial fishing and hunting. She wrote that Australian cricketer Glenn McGrath should not have apologised for taking and sharing trophy photographs with animals he killed while on safari in Africa. She expressed support for the commercial hunting of Saltwater crocodiles in the Northern Territory and described the McGrath controversy as an "opportunity to encourage a debate about the economic, ecological and environmental benefits hunting can bring". In her maiden speech in the Commonwealth Parliament in 2016, Flint spoke of the "modern day scourge of environmental and animal activism". Flint is from Kingston in the south-east of South Australia. Her hometown harbours South Australia's southern rock lobster fishery and other commercial fisheries. In her The Advertiser columns, Flint supported the prospective culling of long-nosed fur seals, Great white sharks and reducing the number of marine park sanctuary zones in South Australian waters. In her 2014 criticism of South Australian marine parks she wrote: "The most endangered species in South Australian coastal waters are our fishermen."
In 2014, during the Western Australian shark cull, Flint expressed her support for the use of drum lines and Shark nets to protect humans from potential attack from Great white sharks. In 2017, she expressed her support for the Liberal Federal council's decision to consider permitting the fishing of great white sharks, pending the results of research undertaken by the CSIRO into the status of the species' population. As of 2017, fishing for great white sharks is prohibited as the animals are listed as "vulnerable" under the EPBC Act. She told The Australian: "We must protect our swimmers and surfers and hard-working Australians like abalone divers from being attacked or killed by sharks."
Political views
Before her election, Flint's political views were expressed in regular opinion editorial columns in The Advertiser.
