If they use the same propulsion system they would have turn turn the vehicle around about halfway.
Unless they are going to use air-braking at Mars. Is there enough atmosphere to do that at that mass and speed?
Mars atmosphere has less than 1% the density of Earth atmosphere.
As much as I love the film The Martian (Matt Damon), the raging Martian dust storm that sets up the entire story line lacks the density to blow around large objects or blow over a space craft.