United Airlines operates flight UA5840 between Sacramento (SMF) and San Francisco (SFO). This route is typically operated by a CRJ-200. Based on United Airlines' current Starlink rollout — 525 of 1,787 aircraft equipped (29% of the fleet) — we estimate a 0% probability that this specific flight is equipped with Starlink satellite WiFi.
No route-specific aircraft evidence needed: CRJ2 is an operator-wide claim covering every CRJ2 aircraft in the fleet (0.0%).
Equipped
Fleet Size
Coverage
Rollout in progress — confirmed install count pending
Score is based on United Airlines's fleet-wide coverage: 525 of 1787 aircraft are Starlink-equipped (29% fleet ratio). No aircraft-type-specific rollout data is recorded for this route, so the score reflects the fleet-wide average.
Starlink coverage on this route is limited. United Airlines has started its Starlink rollout, but this route or aircraft type may not yet be equipped — the probability will rise as more aircraft are confirmed.
No spam. One email when coverage on SMF→SFO updates.
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Based on historical aircraft assignments for this day of the week. Actual aircraft may differ.
United Airlines has announced Starlink but has not yet equipped any aircraft. We'll update this page as installations are confirmed.
Aircraft recently seen operating this flight
Check the Starlink probability on other United Airlines routes.
We estimate a 0% probability that flight UA5840 has Starlink WiFi. No route-specific aircraft evidence needed: CRJ2 is an operator-wide claim covering every CRJ2 aircraft in the fleet (0.0%). 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 UA5840 operates SMF to SFO. Our Starlink probability score for this flight is 0%, 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 probability score for flight UA5840 is 0% based on current fleet data.
The prediction for UA5840 is based on the aircraft actually observed or claimed to operate this route, not a generic fleet-wide guess. No route-specific aircraft evidence needed: CRJ2 is an operator-wide claim covering every CRJ2 aircraft in the fleet (0.0%). 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 score of 80% or above means historical data strongly favours 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.
