  We propose a method to establish time reversal symmetry violation at future
neutrino oscillation experiments in a largely model-independent way. We
introduce a general parametrization of flavour transition probabilities which
holds under weak assumptions and covers a large class of new-physics scenarios.
This can be used to search for the presence of T-odd components in the
transition probabilities by comparing data at different baselines but at the
same neutrino energies. We show that this test can be performed already with
experiments at three different baselines and might be feasible with experiments
under preparation/consideration.
