The Short Version
The claim is well-supported. Multiple credible sources—including Science News, Popular Mechanics, The Debrief, EarthSky, and BBC Sky at Night Magazine—consistently identify satellite flares (both classic Iridium flares and newer Starlink flaring) as a recognized, frequently cited explanation for UFO/UAP sightings. Counterarguments pointing to pre-satellite-era cases or other mundane explanations like drones don't negate the claim, which only asserts satellite flares are "commonly cited"—not that they explain all sightings.