The NSW Upper House is set to examine whether the "station access fee" for Sydney's airport should be dropped, a move the opposition says would "slash" the cost of a train ticket.
Removing the $12.30 fee, which earns the government about $4 million a month, would increase patronage and alleviate congestion around the airport, opposition transport spokeswoman Penny Sharpe said.
"The roads around the airport will be at practical capacity by 2015," she said.
"I want to look into lowering the rail fare to increase patronage and deal with serious congestion on the roads around Sydney Airport."
A report from the inquiry is expected in February.