Apparatus

Try JFK, AAL1290, BAW, or N225AN.

flight_takeoff Flight

UAL2121

Operated by UAL

Live map

Live map filtered to UAL2121. Shown when the flight is currently airborne.

Route airports View route page →

Departure

DEN KDEN VFR

Denver International Airport

Denver, US

Local time
20:29 MDT
Timezone
America/Denver
Type
Large Airport
Elevation
5,431 ft
Coordinates
39.8600, -104.6738

cloud Weather

Wind
80° / 9 kt
Visibility
10 SM
Ceiling
FEW 7,500 ft, BKN 9,000 ft, BKN 13,000 ft
Temp / Dew
27°C / 8°C
Altimeter
30.12 inHg

Obs: 2026-08-29T01:53:00.000Z

Raw METAR / TAF 
METAR KDEN 290153Z 08009KT 10SM FEW075 BKN090 BKN130 27/08 A3012 RMK AO2 SLP112 T02670083

TAF KDEN 290055Z 2901/3006 25010KT P6SM BKN100 BKN140 PROB30 2901/2902 VRB15G30KT -SHRA BKN100 FM290200 24010KT P6SM SCT120 BKN200 FM290500 21009KT P6SM SCT120 SCT200 FM291600 25007KT P6SM FEW110 SCT200 FM291900 25010KT P6SM VCSH SCT100 BKN150 TEMPO 2920/2924 VRB20G35KT -TSRA BKN080CB FM300000 33012KT P6SM SCT100 BKN150 PROB30 3000/3004 -SHRA BKN100

flight Live Traffic

flight_takeoff 319 Departures
flight_land 280 Arrivals

Arrival

GRR KGRR VFR

Gerald R. Ford International Airport

Grand Rapids, US

Local time
22:29 EDT
Timezone
America/Detroit
Type
Large Airport
Elevation
794 ft
Coordinates
42.8808, -85.5228

cloud Weather

Wind
0° / 0 kt
Visibility
10 SM
Ceiling
FEW 25,000 ft
Temp / Dew
18°C / 14°C
Altimeter
30.13 inHg

Obs: 2026-08-29T01:53:00.000Z

Raw METAR / TAF 
METAR KGRR 290153Z 00000KT 10SM FEW250 18/14 A3013 RMK AO2 SLP203 T01830139

TAF KGRR 282337Z 2900/2924 24005KT P6SM FEW080 FM291300 22008KT P6SM SCT150 FM291700 24009KT P6SM BKN120

flight Live Traffic

flight_takeoff 8 Departures
flight_land 12 Arrivals

Recent history last 30

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
2026-07-26 A12378 IAH → ORD Jul 26, 00:20 UTCJul 26, 02:25 UTC2h 5m - -
2026-07-25 A76028 IAH → ORD Jul 25, 00:10 UTCJul 25, 02:15 UTC2h 5m - -
2026-07-24 AAA267 IAH → ORD Jul 24, 00:30 UTCJul 24, 02:30 UTC2h 0m - -
2026-07-23 A83782 IAH → ORD Jul 23, 03:45 UTCJul 23, 05:45 UTC2h 0m - -
2026-07-22 A1239C IAH → ORD Jul 22, 00:20 UTCJul 22, 02:20 UTC2h 0m - -
2026-07-21 A8AD4E IAH → ORD Jul 21, 00:35 UTCJul 21, 02:40 UTC2h 5m - -
2026-07-21 A8AD4E IAH → ORD Jul 21, 00:29 UTCJul 21, 02:33 UTC2h 4m +34m -5m
2026-07-20 A445EF IAH → ORD Jul 20, 00:45 UTCJul 20, 02:55 UTC2h 10m - -
2026-07-19 A43EA6 IAH → ORD Jul 19, 00:25 UTCJul 19, 02:30 UTC2h 5m - -
2026-07-18 A44544 IAH → ORD Jul 18, 00:35 UTCJul 18, 02:45 UTC2h 10m - -
2026-07-17 A94BFC DEN → GRR Jul 17, 00:25 UTCJul 17, 02:30 UTC2h 5m - -
2026-07-16 AA7ABD DEN → GRR Jul 16, 00:20 UTCJul 16, 02:30 UTC2h 10m - -
2026-07-16 AA7ABD DEN → GRR Jul 16, 00:18 UTCJul 16, 02:26 UTC2h 8m +23m -5m
2026-07-15 A43E5E - Jul 15, 00:35 UTCJul 15, 02:50 UTC2h 15m - -
2026-07-14 AA2BA4 DEN → GRR Jul 14, 00:30 UTCJul 14, 02:45 UTC2h 15m - -
2026-07-14 AA2BA4 DEN → GRR Jul 14, 00:18 UTCJul 14, 02:42 UTC2h 24m +23m -6m
2026-07-13 A9DCE9 DEN → GRR Jul 13, 02:50 UTCJul 13, 04:50 UTC2h 0m - -
2026-07-12 AAA593 DEN → GRR Jul 12, 00:18 UTCJul 12, 02:13 UTC1h 55m +23m -15m
2026-07-12 AAA593 DEN → GRR Jul 12, 00:10 UTCJul 12, 02:15 UTC2h 5m - -
2026-07-11 A92365 DEN → GRR Jul 11, 02:00 UTCJul 11, 04:05 UTC2h 5m - -
2026-07-10 A94B50 DEN → GRR Jul 10, 00:20 UTCJul 10, 02:35 UTC2h 15m - -
2026-07-09 A8FC73 DEN → GRR Jul 9, 06:20 UTCJul 9, 08:55 UTC2h 35m - -
2026-07-08 A43EC9 DEN → GRR Jul 8, 00:59 UTCJul 8, 02:49 UTC1h 50m +64m +6m
2026-07-08 A43EC9 - Jul 8, 00:40 UTCJul 8, 02:15 UTC1h 35m - -
2026-07-07 A41E90 - Jul 7, 00:35 UTCJul 7, 02:40 UTC2h 5m - -
2026-07-06 A46D4E - Jul 6, 00:30 UTCJul 6, 02:35 UTC2h 5m - -
2026-07-04 A448D6 DEN → GRR Jul 4, 00:35 UTCJul 4, 02:40 UTC2h 5m - -
2026-07-04 A448D6 DEN → GRR Jul 4, 00:25 UTCJul 4, 02:39 UTC2h 14m +30m -10m
2026-07-03 A91536 DEN → GRR Jul 3, 01:50 UTCJul 3, 04:10 UTC2h 20m - -
2026-07-02 A92478 DEN → GRR Jul 2, 00:20 UTCJul 2, 02:20 UTC2h 0m - -

Performance history

Flights tracked
191 showing last 30
Avg arrival delay
-6m
On-time arrival
100% 100% on time
Aircraft used
24

Monthly activity 4 months

Month Flights tracked
July 2026 32
June 2026 35
May 2026 61
April 2026 63

UAL2121 frequently asked

Where does flight UAL2121 fly?
UAL2121 (UAL) flies from DEN to GRR. View the full route page.
How long is flight UAL2121?
Based on observed flights, UAL2121 takes on average 2h 6m from takeoff to landing.
How often does UAL2121 fly?
UAL2121 has been observed flying several times a week in our tracking data. We've recorded 191 flights under this callsign.
Is flight UAL2121 usually on time?
Across recent flights, UAL2121 arrives 6 minutes early on average. 100% of flights arrive within 15 minutes of schedule.
What aircraft operates flight UAL2121?
UAL2121 has been operated by 24 different aircraft in our records. Tail numbers are listed in the recent history below.
Can I track UAL2121 live?
Yes. When UAL2121 is currently airborne, the live tracker map above shows its real-time position from ADS-B broadcasts. If the map is empty, the flight is not currently in the air.