a crews decision to return to land will be influenced by many things incl the nature of the failure/emergency, a/c ldg capability at that weight with remaining a/c systems, other options nearby, the weather, grd services avail, a/c perf in the missed appr etc etc etc
a heavy 737 with a straight engine failure i expect would be able to get back in to nzwn if ldg dist on a nice day was the only factor. others would know for sure.