  The analysis of waiting times of electron transfers has recently become
experimentally accessible owing to advances in noninvasive probes working in
the short-time regime. We study electron waiting times in a topological Andreev
interferometer: a superconducting loop with controllable phase difference
connected to a quantum spin Hall edge, where the edge state helicity enables
the transfer of electrons and holes into separate leads, with transmission
controlled by the loop's phase difference $\phi$. This setup features gapless
Majorana bound states at $\phi=\pi$. The waiting times for electron transfers
across the junction are sensitive to the presence of the gapless states, but
are uncorrelated for all $\phi$. By contrast, at $\phi=\pi$ the waiting times
of Andreev-scattered holes show a strong correlation and the crossed
(hole-electron) distributions feature a unique behavior. Both effects
exclusively result from the nonlocal properties of Majorana bound states.
Consequently, electron waiting times and their correlations could circumvent
some of the challenges for detecting topological superconductivity and Majorana
states beyond conductance signatures.
