  We present the discovery and subarcsecond localization of a new Fast Radio
Burst with the Karl G. Jansky Very Large Array and realfast search system. The
FRB was discovered on 2019 June 14 with a dispersion measure of 959 pc/cm3.
This is the highest DM of any localized FRB and its measured burst fluence of
0.6 Jy ms is less than nearly all other FRBs. The source is not detected to
repeat in 15 hours of VLA observing and 153 hours of CHIME/FRB observing. We
describe a suite of statistical and data quality tests we used to verify the
significance of the event and its localization precision. Follow-up
optical/infrared photometry with Keck and Gemini associate the FRB to a pair of
galaxies with $\rm{r}\sim23$ mag. The false-alarm rate for radio transients of
this significance that are associated with a host galaxy is roughly
$3\times10^{-4}\ \rm{hr}^{-1}$. The two putative host galaxies have similar
photometric redshifts of $z_{\rm{phot}}\sim0.6$, but different colors and
stellar masses. Comparing the host distance to that implied by the dispersion
measure suggests a modest (~ 50 pc/cm3) electron column density associated with
the FRB environment or host galaxy/galaxies.
