Apparatus

Try JFK, AAL1290, BAW, or N225AN.

flight_takeoff Flight

UAL2121

Operated by United Airlines

Live map

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

Route airports View route page →

Departure

IAH KIAH MVFR

George Bush Intercontinental Airport

Houston, US

Local time
02:58 CDT
Timezone
America/Chicago
Type
Large Airport
Elevation
97 ft
Coordinates
29.9844, -95.3414

cloud Weather

Wind
140° / 7 kt
Visibility
10 SM
Ceiling
BKN 1,300 ft, BKN 2,600 ft
Temp / Dew
27°C / 26°C
Altimeter
29.98 inHg

Obs: 2026-10-13T06:53:00.000Z

Raw METAR / TAF 
METAR KIAH 130653Z 14007KT 10SM BKN013 BKN026 27/26 A2998 RMK AO2 SLP150 T02670256

TAF KIAH 130520Z 1306/1412 14006KT P6SM BKN025 FM131000 15005KT P6SM BKN035 FM131600 15010KT P6SM SCT030 BKN040 PROB30 1318/1323 -TSRA SCT030CB

flight Live Traffic

flight_takeoff 39 Departures
flight_land 63 Arrivals

Arrival

ORD KORD VFR

Chicago O'Hare International Airport

Chicago, US

Local time
02:58 CDT
Timezone
America/Chicago
Type
Large Airport
Elevation
680 ft
Coordinates
41.9786, -87.9048

cloud Weather

Wind
220° / 8 kt
Visibility
10 SM
Ceiling
FEW 25,000 ft
Temp / Dew
23°C / 16°C
Altimeter
29.73 inHg

Obs: 2026-10-13T07:51:00.000Z

Raw METAR / TAF 
METAR KORD 130751Z 22008KT 10SM FEW250 23/16 A2973 RMK AO2 SLP061 T02330156 $

TAF KORD 130539Z 1306/1412 22012KT P6SM SCT150 WS015/26050KT FM131000 27010KT P6SM FEW020 SCT100 FM140100 02006KT P6SM SCT040 BKN090 FM140400 05007KT P6SM VCTS SCT030 OVC040CB TEMPO 1405/1409 3SM -TSRA SCT020 BKN030CB FM141000 03010KT P6SM SCT012 BKN025

flight Live Traffic

flight_takeoff 153 Departures
flight_land 187 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 (United Airlines) flies from IAH to ORD. 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.