It depends. There are two primary mapping schemes for SNES cartridges: LoROM and HiROM. HiROM uses $10000-byte banks, so yes, the pointers - assuming there isn't some relative address trickery going on - will be 16-bit little-endian, as you've described.
It gets a little trickier if they're LoROM. LoROM banks are $8000 bytes each, so the SNES memory addresses don't line up so nicely with the file addresses. If the HiROM pointer would be $8000 or more, you'll need to subtract $8000 to get the LoROM pointer.
File address $017FFC = LoROM address $7FFC (Bank 3) = HiROM address $7FFC (Bank 1)
File address $0182FA = LoROM address $02FA (Bank 4) = HiROM address $82FA (Bank 1)
Does that help you understand?
Alternately, you could just use Lunar Address