UA5326 is used on multiple routes, but the most common is between Burbank, CA (BUR-Bob Hope) and San Francisco, CA (SFO-San Francisco Intl.). If your flight is direct, you'll step off the plane in roughly 1 hour and 35 minutes. Multi-stop flights can also use the same number, as can flights on other routes.
It's likely you'll be hopping on board the Bombardier CRJ if you've booked a seat on flight number UA5326 from Burbank, CA (BUR-Bob Hope) to San Francisco, CA (SFO-San Francisco Intl.). This is the most commonly used aircraft type on this route.