how long would it take to get to jupiter by car

[StCassidy]

Driving a car to Jupiter is impossible with current or foreseeable technology, so the question is hypothetical. However, if we humor the scenario, the trip would take roughly 5.5 to 6 years of non-stop driving at highway speeds. This estimate is based on the average distance between Earth and Jupiter when they are closest, a configuration called opposition, which occurs about every 13 months.

The core reason this is a fantasy, beyond the lack of a road, is the vacuum of space. Cars require air for combustion engines to burn fuel and for tires to grip a surface. In space, neither exists. Furthermore, a car's top speed is negligible on an interplanetary scale. Let's compare a car's hypothetical journey to actual NASA mission data to illustrate the vast differences in technology and time.

Mission / Vehicle	Travel Time to Jupiter	Top Speed / Method	Key Limitation for a Car
Family Sedan (e.g., 75 mph)	~5.5 - 6 years	120 km/h (75 mph)	Requires a physical road and atmosphere; no propulsion in space.
NASA's Voyager 1	1 year, 9 months	Gravity assists, reaching ~60,000 km/h	Utilized planetary gravity slingshots for acceleration.
NASA's Juno Spacecraft	5 years	Powered launch and gravity assist	Carries its own propellant for course corrections.
Parker Solar Probe	(Theoretical) Would be faster	~700,000 km/h (430,000 mph)	Uses the Sun's gravity; a car has no such propulsion system.

The real challenge isn't just the distance, which varies from 588 million to 968 million kilometers, but achieving the necessary escape velocity to break free from Earth's gravity—something a car engine is incapable of. Even if you could drive, you'd need to account for orbital mechanics; you couldn't just point and drive in a straight line. You'd have to follow a transfer orbit, which takes longer but uses less energy. Ultimately, robotic spacecraft relying on powerful rockets and complex physics make the journey in years; a car would be permanently parked on Earth.

[McVincent]

Oh, you can't. It’s not like a road trip to another state. There’s no road, no air to breathe, and your car would just sit there if you tried. Even if you could magically drive, it would take over five years going 75 miles an hour without ever stopping for gas. Space probes use giant rockets to get going fast, not tires on pavement. It's a fun thought, but totally science fiction.

[StJohn]

Think of it like this: I’d explain to my kid that Jupiter is so far away that light itself, the fastest thing in the universe, takes over half an hour to get there from us. Our car’s headlights? Those beams would take years to arrive. A car is built for Earth’s environment—gas, air, roads. In space, it’s an empty, airless void where none of that works. The journey isn't about mileage; it's about fundamental physics we can't overcome with a car.

[VonArthur]

As an engineering problem, it's a non-starter. First, a car's combustion engine requires atmospheric oxygen, which is absent in space. Second, you must achieve Earth's escape velocity of about 25,000 mph just to leave the planet; a car's top speed is less than 200 mph. The fuel requirement for a constant-thrust engine to simulate "driving" would be astronomically impossible to carry. The travel time is the least of your concerns when the basic mechanics of propulsion and life support are completely unworkable.

[StIan]

The question highlights the incredible scale of our solar system. The minimum distance to Jupiter is about 365 million miles. At a steady 70 mph, you're looking at nearly 600 years of continuous driving. That's longer than the United States has existed as a country. This comparison really drives home why we use powerful rockets and precise orbital trajectories. It’s not a matter of endurance; it’s a matter of using the right tool for the job, and a car is the wrong tool.