How much it will cost to attend a MLB game. A family of four can expect to pay about $212 on average to take in a Major League Baseball game. But costs vary dramatically by team, according to preseason study by Team Marketing Report in Chicago.ow much it will cost to attend a MLB game. A family of four can expect to pay about $212 on average to take in a Major League Baseball game. But costs vary dramatically by team, according to preseason study by Team Marketing Report in Chicago.