There are a number of options for "season tickets," so the cost depends on what you choose. The Yankees offer, for example, an 11-game bleacher seat package, which costs about $100. A full-season seat in a field-level box will run you about $4500. If you want to discuss options for season tickets, your best bet is to go out to the stadium and speak with the staff in the box office. They are most helpful. The wait on the phone is endless and you are likely to be cut-off in the process.