Flexi Says: The time it takes to get to Mars varies with the positions of Earth and Mars in their orbits, and also with the speed of the spacecraft. NASA's Perseverance craft will take about 7 months to reach to Mars. Other missions have taken about 9 months to reach Mars. These missions are launched during the ideal window in which Earth and Mars are closest to each other in their orbits, which occurs about every 2 years.
