Two days of negotiations between airlines and the Narita Airport Authority over user charges ended in a stalemate Wednesday, with little hope left for any deals before the current five-year agreement expires April 18.

If the two sides fail to reach agreement before the deadline, the airlines will continue for the time being to pay the current 2,400 yen per ton.

The IATA Japan User Charges Board, which represents all of the 67 scheduled airlines that use Narita, has argued that the charge should be lowered to 1,950 yen.