Ok, when are you going and what days of the week are you flying on?!?! I never though Air Canada got that cheap!
Although we aren't planning on going until late August early September, we are planning on flying on weekdays (a Monday and Tuesday) and staying over a weekend - I get prices in the $230/person range EACH WAY on TANGO!
A $79 one way rate is a fairly decent one on one of the discount (AirTran, Spirit, etc.) airlines out of Detroit!