UA5370 is used on multiple routes, but the most common is between Lubbock, TX (LBB-Preston Smith Intl.) and Denver, CO (DEN-Denver Intl.). If you manage to score a direct flight, you'll stroll through arrivals in about 1 hour and 43 minutes. Multi-stop flights can also use this number, as can services on other routes.
It's likely you'll be traveling aboard the Bombardier CRJ if you're on flight number UA5370 from Lubbock, TX (LBB-Preston Smith Intl.) to Denver, CO (DEN-Denver Intl.). This is the most commonly used aircraft on this route.