Orthodox canon law (and therefore Orthodox Churches) do not allow or recognize divorce as such.
What actually happens is that in some cases of divorce that has taken place (in spite of every effort by the Church to prevent it), a party may after some time approach the bishop and seek permission to obtain a penitential second marriage under specific circumstances: (1) the innocent party who is the victim of adultery, according to Matthew 19:9 in plain translation (2) the innocent party who is the victim of another absolute end of the marriage for other extraordinary reasons (3) a party who has tried to save the marriage but at the end of the process is able to convince the hierarch (bishop) that a second marriage would be a safeguard toward salvation.