UAL638
- Airline
- United Airlines (UAL)
- Route
- San Francisco International Airport (SFO/KSFO) →
- Observed take-off
- Last heard
- Aircraft
- N37531 · B39M
- Positions recorded
- 257 As of 2026-10-08 03:01 UTC
Source: observations by the map.flights community network of ADS-B receivers; times in UTC.