mars and back would take about six hundred and forty days six months with the outbound flights a month on site and fifteen months home. where she out to travel to mars we need of course a rocket conventional chemical propulsion engines are pretty advanced the fuel is burned with oxygen to give maximum thrust this will enable us to fly to mars in six months. all seen what five. of. two chemical rocket propulsion projects are currently making advances now says space launch system or enceladus. it's a deep space launch vehicle with several propulsion stages that could transport four people and fifty tons of payload to mars. the space x.