In the worst-case scenario, Musk said that his company will land humans on Mars in 10 years' time.
Fridman asked Musk when he thinks human beings will land on the Red Planet.
The billionaire said the best case was five years and the worst case 10 years.
The determining factors were "engineering the vehicle," and "starship is the most complex and advanced rocket that's ever been made."
Musk told Fridman that the cost per ton to the surface of Mars is the fundamental optimization of Starship.
Musk said that nobody can fly to Mars for a billion dollars. He said that no amount of money can get you a ticket to Mars.
The CEO of the two companies has a number of dates for their landing on the Red Planet.
Musk said in an interview on the audio app that it will take five and a half years before a crewed mission of the spaceship could land on the Red Planet.
In March, Musk said that his company would land its rockets on Mars.
Insider was told by experts that it could take longer than he is predicting if things don't go to plan.
One million people will be flown to the Red Planet by Musk's 1,000 Starship rockets.
