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 VFR

George Bush Intercontinental Airport

Houston, US

Local time
04:49 CDT
Timezone
America/Chicago
Type
Large Airport
Elevation
97 ft
Coordinates
29.9844, -95.3414

cloud Weather

Wind
0° / 0 kt
Visibility
10 SM
Ceiling
CLR
Temp / Dew
24°C / 22°C
Altimeter
29.85 inHg

Obs: 2026-05-30T08:53:00.000Z

Raw METAR / TAF 
METAR KIAH 300853Z 00000KT 10SM CLR 24/22 A2985 RMK AO2 SLP107 T02390222 55009

TAF KIAH 300837Z 3009/3112 19005KT P6SM FEW045 BKN250 FM301100 VRB03KT P6SM SCT010 BKN028 FM301500 21006KT P6SM FEW015 SCT030 FM301800 17009KT P6SM SCT040 BKN250 FM310300 18006KT P6SM FEW030 BKN250 FM311000 00000KT P6SM BKN030

flight Live Traffic

flight_takeoff 155 Departures
flight_land 158 Arrivals

Arrival

ORD KORD VFR

Chicago O'Hare International Airport

Chicago, US

Local time
04:49 CDT
Timezone
America/Chicago
Type
Large Airport
Elevation
680 ft
Coordinates
41.9786, -87.9048

cloud Weather

Wind
60° / 4 kt
Visibility
10 SM
Ceiling
BKN 25,000 ft
Temp / Dew
15°C / 11°C
Altimeter
30.00 inHg

Obs: 2026-05-30T08:51:00.000Z

Raw METAR / TAF 
METAR KORD 300851Z 06004KT 10SM BKN250 15/11 A3000 RMK AO2 SLP155 T01500106 53008 $

TAF KORD 300905Z 3009/3112 07007KT P6SM BKN250 FM301500 08014KT P6SM BKN250 FM310600 13008KT P6SM BKN250

flight Live Traffic

flight_takeoff 341 Departures
flight_land 606 Arrivals

Recent history last 30

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
2026-05-30 A94B50 IAH → ORD May 30, 01:40 UTCMay 30, 03:45 UTC2h 5m - -
2026-05-29 A94B72 IAH → ORD May 29, 01:55 UTCMay 29, 04:00 UTC2h 5m - -
2026-05-28 A92365 IAH → ORD May 28, 00:00 UTCMay 28, 02:05 UTC2h 5m - -
2026-05-27 A9D626 IAH → ORD May 27, 00:34 UTCMay 27, 02:44 UTC2h 10m - -
2026-05-26 A837A5 IAH → ORD May 26, 00:39 UTCMay 26, 02:44 UTC2h 5m - -
2026-05-24 AA7E56 IAH → ORD May 24, 00:30 UTCMay 24, 02:30 UTC2h 0m - -
2026-05-23 A94B51 IAH → ORD May 23, 00:45 UTCMay 23, 02:45 UTC1h 59m - -
2026-05-22 A8D4D2 IAH → ORD May 22, 00:35 UTCMay 22, 02:55 UTC2h 20m - -
2026-05-21 A8F0BD IAH → ORD May 21, 01:46 UTCMay 21, 03:30 UTC1h 44m +106m -6m
2026-05-21 A8F0BD IAH → ORD May 21, 01:30 UTCMay 21, 03:30 UTC2h 0m - -
2026-05-20 A553CE IAH → ORD May 20, 18:15 UTCMay 20, 20:00 UTC1h 45m - -
2026-05-20 A2DFFE IAH → ORD May 20, 00:20 UTCMay 20, 02:20 UTC2h 0m - -
2026-05-19 A55EF3 IAH → ORD May 19, 17:35 UTCMay 19, 19:10 UTC1h 35m - -
2026-05-19 A3CF6D IAH → ORD May 19, 00:35 UTCMay 19, 02:40 UTC2h 5m - -
2026-05-18 A5EE13 IAH → ORD May 18, 17:55 UTCMay 18, 19:35 UTC1h 39m - -
2026-05-18 A94B0A IAH → ORD May 18, 00:40 UTCMay 18, 03:01 UTC2h 20m - -
2026-05-17 A24529 IAH → ORD May 17, 20:50 UTCMay 17, 22:50 UTC2h 0m - -
2026-05-17 A612A6 IAH → ORD May 17, 17:15 UTCMay 17, 18:50 UTC1h 35m - -
2026-05-17 AA568E IAH → ORD May 17, 00:40 UTCMay 17, 02:40 UTC2h 0m - -
2026-05-16 A0B849 IAH → ORD May 16, 20:40 UTCMay 16, 22:45 UTC2h 5m - -
2026-05-16 A56661 IAH → ORD May 16, 16:45 UTCMay 16, 18:25 UTC1h 40m - -
2026-05-16 A8AD4E IAH → ORD May 16, 00:25 UTCMay 16, 02:35 UTC2h 10m - -
2026-05-15 A91535 IAH → ORD May 15, 00:33 UTCMay 15, 02:35 UTC2h 2m +32m +4m
2026-05-15 A91535 IAH → ORD May 15, 00:25 UTCMay 15, 02:40 UTC2h 15m - -
2026-05-14 A6045D IAH → ORD May 14, 18:00 UTCMay 14, 19:40 UTC1h 40m - -
2026-05-14 A94B0B IAH → ORD May 14, 00:20 UTCMay 14, 02:20 UTC2h 0m - -
2026-05-13 A5A2CC IAH → ORD May 13, 18:20 UTCMay 13, 20:05 UTC1h 45m - -
2026-05-13 A445EE IAH → ORD May 13, 00:20 UTCMay 13, 02:20 UTC2h 0m - -
2026-05-12 A60814 IAH → ORD May 12, 17:25 UTCMay 12, 19:15 UTC1h 50m - -
2026-05-12 A60814 IAH → ORD May 12, 17:31 UTCMay 12, 19:08 UTC1h 37m +113m +89m

Performance history

Flights tracked
123 showing last 30
Avg arrival delay
+29m
On-time arrival
67% 67% on time
Aircraft used
27

Monthly activity 2 months

Month Flights tracked
May 2026 60
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 1h 57m 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 123 flights under this callsign.
Is flight UAL2121 usually on time?
Across recent flights, UAL2121 arrives with an average 29-minute delay. 67% of flights arrive within 15 minutes of schedule.
What aircraft operates flight UAL2121?
UAL2121 has been operated by 27 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.