Everyone dies. There are no exceptions. They did not die in the crash.
Kate, Sawyer, Miles, Richard, Claire, & the pilot (can never remember his name) made it home. Hugo & Ben stayed on the island. They died later, possibly as quite elderly people (not likely in Sawyer's case). In the case of Hugo & Ben that could have been hundreds or even thousands of years later. The exchange between Hugo & Ben outside the church indicates a long relationship as protectors of the island. The flash sideways were actually flash forwards to a time all of them were dead. All of the scenes in which it seemed the crash never took place were actually in the afterlife.