How much does it cost to fix a leak in the oil pan of an 1998 dodge neon?

that depends on whether the oil pan gasket is leaking of it you have a hole in the oil pan if you have leaking gasket, the engine needs to be raised to enable removal of oil pan, gonna cost you some bucks. if you have a hole, drain the oil pan. buy a good filler at auto store, clean area round hole and plug leak i priced it today and it was 2.5 hours labor plus the price of the pan and gasket. around 400 bucks.