United Airlines operates flight UA566 between Sacramento (SMF) and Denver (DEN). This route is typically operated by a 737-900. Based on United Airlines' current Starlink rollout — 665 of 1,575 aircraft equipped (42% of the fleet) — our Starlink rating for this specific flight is likely.
Based on how many 737-900 aircraft at United Airlines have Starlink.
Equipped
Fleet Size
Coverage
Source: United's Starlink tracker, as of Oct 29, 2026
31 aircraft independently verified
Based on how many 737-900 aircraft at United Airlines have Starlink.
Likely means most of the evidence points to Starlink on this flight, but it is not certain.
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B739
Based on historical aircraft assignments for this day of the week. Actual aircraft may differ.
Rating: Likely. This is our rating that this specific flight has Starlink. Based on how many 737-900 aircraft at United Airlines have Starlink.
Aircraft recently seen operating this flight
Check the Starlink rating on other United Airlines routes.
Our Starlink rating for flight UA566 is likely. Based on how many 737-900 aircraft at United Airlines have Starlink. United Airlines is actively rolling out Starlink across its fleet. Check back as our data updates when new aircraft are confirmed.
United Airlines uses Starlink satellite WiFi on equipped aircraft. Flight UA566 operates SMF to DEN. Our Starlink rating for this flight is likely, based on United Airlines' fleet rollout data and confirmed tail numbers.
The most reliable method is to check your specific tail number after check-in — your boarding pass or the United Airlines app may show the aircraft registration. You can then search that tail number on StarlinkFlights.com. Alternatively, our rating for flight UA566 is likely, based on current fleet data.
The prediction for UA566 is based on the aircraft actually observed or claimed to operate this route, not a generic fleet-wide guess. Based on how many 737-900 aircraft at United Airlines have Starlink. A confirmed, dated passenger sighting for this specific flight can override this when one exists.
No prediction can guarantee a specific aircraft. Airlines perform last-minute equipment swaps for maintenance, operational needs, or schedule changes — meaning a Starlink-equipped tail can be replaced by a non-equipped one on the day. A rating of very likely means historical data strongly favors Starlink on this flight, but it is not a guarantee. For the most reliable information, check the airline's gate display or app on the day of departure.
