Return to field — UAL1931

KSFO · 01L

2026-08-24 21:20 UTC· KSFO → KSFO· UNITED AIRLINES INC· B738

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UAL1931 (United Airlines) was operating from KSFO to KSFO (San Francisco International Airport) on 2026-08-24. SkyMeter detected a return to field at San Francisco International Airport (KSFO) on runway 01L at 21:20 UTC. Peak cruise altitude FL385, turnaround area near Rancho Palos Verdes, US. METAR at the time reported 0 kt wind, 16,093 m visibility. Detection algorithm and known limitations: see SkyMeter methodology.

Active FAA TFR during this flight

Source: FAA TFR archive (hourly snapshot)
  • SECURITY6/2652 2026-07-05 00:01Z – 2027-01-02 23:59Z SFC–500 ft

    Coyote Wells, CA, Saturday, July 4, 2026 through Saturday, January 2, 2027 Local

    View FAA NOTAM →
  • SECURITY6/4812 2026-07-15 07:00Z – 2027-07-14 06:59Z SFC–17,999 ft

    El Centro, CA, Wednesday, July 15, 2026 through Tuesday, July 13, 2027 Local

    View FAA NOTAM →
  • HAZARDS6/5070 2026-08-14 13:00Z – 2026-08-27 03:00Z SFC–8,500 ft

    8NM SE BIG SUR, CA, Friday, August 14, 2026 through Thursday, August 27, 2026 UTC

    View FAA NOTAM →

SkyMeter cross-referenced this flight against FAA-published TFRs that were active during its window and within its geographic bounding box. Overlap doesn't necessarily mean violation — the aircraft may have been outside the TFR’s precise polygon or flying under air-traffic-control coordination.

Pilot review data

  • Runway 01L
  • 38532 ft AGL at event
  • 463 kt ground speed
  • 0 fpm vertical
  • 0 kt wind
  • 0 kt crosswind component
  • 16,093 m visibility
  • KSFO 162256Z 27020G25KT 10SM FEW013 BKN026 18/12 A2999 RMK AO2 PK WND 28027/2240 SLP156 T01780117

Flight context

  • UAL1931
  • United Airlines
  • B738
  • KSFO → KSFO
  • 2026-08-24 21:20 UTC
  • KSFO runway 01L

Automated analysis. Events shown on this page (such as go-around, unstable approach, or runway events) are heuristic classifications produced by algorithms from publicly broadcast ADS-B data. They are intended to surface flights of interest for further review — they are not findings of fact, and they do not determine pilot fault, regulatory compliance, or the cause of any occurrence. Coverage gaps and sensor noise can affect accuracy. Only the relevant civil aviation authority or accident investigation body can make official determinations. How we detect events · Dispute or correct this data

SkyMeter · trace data observed via ADS-B· KSFO