Patients in regional Australia can soon be treated by doctors on medical jets, saving crucial time and lives.

Swiss company Pilatus have spent three years designing the $13 million purpose-built jets for the Royal Flying Doctor Service (RFDS).

The first of the new PC-24s arrived in Western Australia at the weekend, with one based at Perth's Jandakot Airport and the other to be based in Broome.

A third medical jet is scheduled to arrive in Adelaide in February, servicing both South Australia and the Northern Territory.

RFDS WA chief executive officer Rebecca Tomkinson said the jets can reach speeds of up to 740 kilometres per hour, halving the travel times to remote parts of the state.

"We need time on our side to maximise the health outcomes when a person is undergoing a heart attack or if they are involved in an accident," she said.

Ms Tomkinson said the jet would save more than two hours of travel time on a Perth to Broome trip, while a journey to the Goldfields would be about 30 minutes faster.

The RFDS jet can carry up to three stretchered patients and two medical teams. ( Supplied: Pilatus )

The jets will also have a greater capacity than the current RFDS planes, the PC-12.

It can carry three stretchered patients and two medical teams, instead of the standard two stretchers and one medical team.

"With the PC-12, we have an emergency room in the sky but the PC-24 is really a ward," Ms Tomkinson said.

The PC-24 is the world's first business jet to come equipped with a cargo door, allowing stretchers to be easily loaded. ( Supplied: Pilatus )

"So it is a real steep change in the capacity and capability that we can deliver to our regions, which is really important to us."

A world first

Swiss company Pilatus currently supplies a fleet of about 35 planes to the RFDS, but the aeromedical PC-24 jet is the first of its kind.

Pilatus general aviation vice president Ignaz Gretener said the company partnered with Aerolite AG to install the state-of-the-art medical interior.

"The large cargo door and bespoke electric stretcher loading device facilitates safe, ultra-easy loading and unloading of patients," he said.

"The PC-24 is the world's first jet to offer this possibility."

While the jets were built in Switzerland, they will soon be used in a drastically different environment.

Mr Gretener said the aircraft was developed specifically for the outback.

"Its outstanding performance on short runways and unpaved strips will provide the RFDS with a previously unattained degree of flexibility," he said.

It offers a greater 'off-road' capability than Australia's only aeromedical jet, which will now be decommissioned after it reached its 10-year lifespan.

Vast distances travelled quicker

Newly appointed RFDS WA general manager of aviation Geoff Horsley knew better than most, just how vital the service could be.

RFDS WA general manager of aviation Geoff Horsley with the current PC-12 aircraft. ( ABC Goldfields-Esperance: Tara De Landgrafft )

Growing up in regional WA, he said both he and members of his family have been patients of the Flying Doctor service.

"There has been a few of us actually, we've got our money's worth," he said.

Mr Horsley said his aviation team felt privileged to use the new aircraft because it will improve response times for patients across the state.

"It will cut our retrieval times in half, particularly in the remote areas, into the [remote Ngaanyatjarra] Lands, the Kimberley, the Pilbara, those sorts of places," he said.

"The PC-12s are great aeroplanes, but we have such vast distances in WA where we needed something that was going to get us there a lot quicker."

Pilots and engineers have completed advanced training overseas, while doctors and nurses will be trained over the coming weeks.

The WA jets will come into service in March and cost an initial total of $26 million, including a $10 million contribution from mining giant Rio Tinto and $4.5 million from the Federal Government.

Over the next four years, the service will seek additional funding from government, business and the community.