United Airlines operates flight UA2021 between Dulles (IAD) and San Juan (SJU). This route is typically operated by a 737 MAX 9. Our Starlink rating for this flight is possible. Based on how many 737 MAX 9 aircraft at United Airlines have Starlink. On the most recent figures we hold, Starlink is on 682 of United Airlines' 1,575 aircraft.
Based on how many 737 MAX 9 aircraft at United Airlines have Starlink.
Equipped
Fleet Size
Coverage
Source: United's Starlink tracker, as of Nov 7, 2026
45 aircraft independently verified
Based on how many 737 MAX 9 aircraft at United Airlines have Starlink.
Possible means the evidence is mixed or thin. Some aircraft on this route may have Starlink and some may not.
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Rating: Possible. This is our rating that this specific flight has Starlink. Based on how many 737 MAX 9 aircraft at United Airlines have Starlink.
Aircraft that operated UA2021 in the last 90 days, from our weekly flight tracking. Showing 10 of 26.
| Aircraft | Type | Last week seen | Starlink |
|---|---|---|---|
| N17430 | 737 MAX 9 | Nov 2, 2026 | Not confirmed |
| N17431 | 737 MAX 9 | Nov 2, 2026 | Not confirmed |
| N37532 | 737 MAX 9 | Nov 2, 2026 | Not confirmed |
| N47412 | 737 MAX 9 | Nov 2, 2026 | Not confirmed |
| N57480 | Unknown | Nov 2, 2026 | Not confirmed |
| N17565 | 737 MAX 9 | Oct 26, 2026 | Not confirmed |
| N17452 | 737 MAX 9 | Oct 26, 2026 | Not confirmed |
| N47275 | 737 MAX 9 | Oct 5, 2026 | Not confirmed |
| N17289 | 737 MAX 8 | Sep 28, 2026 | Not confirmed |
| N17320 | 737 MAX 8 | Sep 28, 2026 | Not confirmed |
Check the Starlink rating on other United Airlines routes.
Our Starlink rating for flight UA2021 is possible. Based on how many 737 MAX 9 aircraft at United Airlines have Starlink. United Airlines is actively rolling out Starlink across its fleet. Check back as our data updates.
United Airlines uses Starlink satellite WiFi on equipped aircraft. Flight UA2021 operates IAD to SJU. We rate flight UA2021 possible.
The most reliable method is to check your specific aircraft. Flight-tracking sites and some airline apps show the aircraft registration close to departure. You can search that registration on StarlinkFlights.com. Our rating for flight UA2021 is possible. The explanation is on this page.
The rating is a label, not a guarantee. It reflects the evidence we hold for the route. Based on how many 737 MAX 9 aircraft at United Airlines have Starlink. Passenger speed tests and aircraft records for this specific flight are listed on this page as evidence. They do not change the rating.
No rating can guarantee a specific aircraft. Airlines swap aircraft for maintenance, operations or schedule changes, so an equipped aircraft can be replaced by one without Starlink on the day. A high rating means the evidence favors Starlink, but it is not a guarantee. On the day of departure, check the airline's gate display or app.
