  We measure the clustering of Lyman Alpha Emitting galaxies (LAEs) selected
from the One-hundred-square-degree DECam Imaging in Narrowbands (ODIN) survey,
with spectroscopic follow-up from Dark Energy Spectroscopic Instrument (DESI).
We use DESI spectroscopy to optimize our selection and to constrain the
interloper fraction and redshift distribution of our narrow-band selected
sources. We select samples of 4000 LAEs at z=2.45 and 3.1 in 9 sq.deg. centered
on the COSMOS field with median LyA fluxes of 10^{-16}erg/s/cm2. Covariances
and cosmological inferences are obtained from a series of mock catalogs built
upon high-resolution N-body simulations that match the footprint, number
density, redshift distribution and observed clustering of the sample. We find
that both samples have a correlation length of r_0=(3.0\pm 0.2)Mpc/h. Within
our fiducial cosmology these correspond to 3D number densities of 10^{-3}
h^3/Mpc^3 and, from our mock catalogs, biases of 1.7 and 2.0 at z=2.45 and 3.1,
respectively. We discuss the implications of these measurements for the use of
LAEs as large-scale structure tracers for high-redshift cosmology.
