And from Wiki:
Several types of mission plans have been proposed, including opposition class and conjunction class,[6] or the Crocco flyby.[8] The lowest energy transfer to Mars is a Hohmann transfer orbit, a conjunction class mission which would involve a roughly 9-month travel time from Earth to Mars, about 500 days (16 mo)[citation needed] at Mars to wait for the transfer window to Earth, and a travel time of about 9 months to return to Earth.[9][10] This would be a 34-month trip.
Shorter Mars mission plans have round-trip flight times of 400 to 450 days,[11] or under 15 months for an opposition-class expedition, but would require significantly higher energy. A fast Mars mission of 245 days (8.0 months) round trip could be possible with on-orbit staging.[12] In 2014, ballistic capture was proposed, which may reduce fuel cost and provide more flexible launch windows compared to the Hohmann.[13]
9 months each way, and 500 (Earth) days kicking dust while you're there? No thanks
Several types of mission plans have been proposed, including opposition class and conjunction class,[6] or the Crocco flyby.[8] The lowest energy transfer to Mars is a Hohmann transfer orbit, a conjunction class mission which would involve a roughly 9-month travel time from Earth to Mars, about 500 days (16 mo)[citation needed] at Mars to wait for the transfer window to Earth, and a travel time of about 9 months to return to Earth.[9][10] This would be a 34-month trip.
Shorter Mars mission plans have round-trip flight times of 400 to 450 days,[11] or under 15 months for an opposition-class expedition, but would require significantly higher energy. A fast Mars mission of 245 days (8.0 months) round trip could be possible with on-orbit staging.[12] In 2014, ballistic capture was proposed, which may reduce fuel cost and provide more flexible launch windows compared to the Hohmann.[13]
9 months each way, and 500 (Earth) days kicking dust while you're there? No thanks