A non dblink alternative would be the use of SQLPlus copy command. SQLPlus copy command opens two connections, one with the source and one with the target database.

I know copy command is supposed to be obsolete/deprecated but if you do "help copy" on SQLPlus 11gR2 it is still there.

Another non dblink alternative would be one relying on an expdp/ftp/impdp kind of process which can be scripted and automated.