I work for the airlines, well for Delta, our policy is the bag must weigh 50lbs anything over 50ibs is a extra $90.00!!!!!! So you def wanna be at 50lbs or take some stuff out and put it in your carry on. Cuase that's a crazy amount of money.
check this link you may get some idea
usually their charges depends on airlines and the class you are travelling.
plus just for taking a bag on with you is $25, and that is at 50lbs. If your first class your bag can weigh up to 65lbs for free
Depends. What class are you flying, what airline are you flying and where are you flying from and to.
Around maybe 20-35 extra dollars. Possiably more