National courts first, then European Court of Human Rights if they will not win in national courts.
Based on this report relatives of victims can sue in ECHR all involved parties, including both Russian Federation (for providing military equipment to separatists) and Ukraine (for not closing air space for civil flights).
Based on this report relatives of victims can sue in ECHR all involved parties, including both Russian Federation (for providing military equipment to separatists) and Ukraine (for not closing air space for civil flights).