  We study the effect of gravity on neutrino flavor oscillations when each mass
eigenstate is described by a wave packet instead of a plane wave. Two different
approaches for implementing the wave packet formalism in the study of neutrino
flavor oscillations in curved spacetime are examined. We work with a general
static and spherically symmetric spacetime before applying our results to a few
spacetime metrics of interest. We first focus on general relativity by
examining the effect of the exterior and interior Schwarzschild solutions, as
well as the de Sitter-Schwarzschild metric, and then we examine selected
metrics from modified gravity models.
