UAL
UAL1521 is a flight number operated by UNITED AIRLINES INC between Des Moines International Airport (KDSM) and Denver International Airport (KDEN). SkyMeter last tracked UAL1521 on September 25, 2026. The flight is most often flown by a AIRBUS Airbus A319. Typical block time is 1h 28m. SkyMeter has observed 105 legs of this flight number via ADS-B.
SkyMeter tracks historical flight activity from ADS-B data — this is not a live gate-to-gate status feed.
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FLIGHTS
105
last 90 days
⏱
AVG DURATION
1h 28m
tracked time
📅
SERVICE PERIOD
5/27/2025 → 9/25/2026
first → last seen
🗺
ROUTES / TYPES
4 / 3
city pairs · airframes
⚠
INCIDENT RATE
1.0%
1 flagged
Aircraft types
Equipment used on this number
Safety profile
Flagged flights · last 90 days
Go-arounds
1
Unstable approach
0
Rejected TO
0
Stall warnings
0
Overspeeds
0
Runway excursion
0
Counts represent flights with at least one occurrence of each
flag, not the total event count. See /incidents for individual events.
Recent flights
Newest 30 operations of UAL1521
© SkyMeter ·
All flight data subject to ODbL attribution
·
Tracked: 90-day window