Apparatus

Try JFK, AAL1290, BAW, or N225AN.

flight_takeoff Flight

UAL21

Operated by UAL

Live map

Live map filtered to UAL21. Shown when the flight is currently airborne.

Upcoming flights 1 scheduled

From To Scheduled departure Estimated arrival Status
AMS IAH Jul 14, 09:50 AM UTC Jul 14, 08:04 PM UTC PLANNED

Route airports View route page →

Departure

AMS EHAM VFR

Amsterdam Airport Schiphol

Amsterdam, NL

Local time
09:32 GMT+2
Timezone
Europe/Amsterdam
Type
Large Airport
Elevation
-11 ft
Coordinates
52.3086, 4.7639

cloud Weather

Wind
40° / 11 kt
Visibility
6 SM
Ceiling
CAVOK
Temp / Dew
22°C / 16°C
Altimeter
30.09 inHg

Obs: 2026-07-14T07:25:00.000Z

Raw METAR / TAF 
METAR EHAM 140725Z 04011KT 020V080 CAVOK 22/16 Q1019 NOSIG

TAF EHAM 140432Z 1406/1512 04012KT CAVOK

flight Live Traffic

flight_takeoff 17 Departures
flight_land 24 Arrivals

Arrival

IAH KIAH VFR

George Bush Intercontinental Airport

Houston, US

Local time
02:32 CDT
Timezone
America/Chicago
Type
Large Airport
Elevation
97 ft
Coordinates
29.9844, -95.3414

cloud Weather

Wind
40° / 4 kt
Visibility
7 SM
Ceiling
SCT 400 ft, SCT 1,100 ft, OVC 14,000 ft
Temp / Dew
25°C / 25°C
Altimeter
30.06 inHg

Obs: 2026-07-14T06:53:00.000Z

Raw METAR / TAF 
METAR KIAH 140653Z 04004KT 7SM SCT004 SCT011 OVC140 25/25 A3006 RMK AO2 SLP180 T02500250 $

TAF KIAH 140520Z 1406/1512 VRB03KT P6SM FEW008 SCT020 OVC150 TEMPO 1406/1410 BKN008 FM141000 VRB04KT P6SM VCTS SCT015 BKN020CB FM141200 16005KT 5SM SHRA VCTS SCT015 BKN020CB TEMPO 1412/1416 3SM TSRA OVC015CB FM141600 18007KT 6SM SHRA BR SCT020 BKN025 FM141900 15007KT P6SM SCT030 OVC100 FM150300 VRB03KT P6SM SCT030 BKN070

flight Live Traffic

flight_takeoff 126 Departures
flight_land 153 Arrivals

Recent history last 30

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
2026-07-13 A86AB5 - Jul 13, 09:55 UTCJul 13, 20:15 UTC10h 20m - -
2026-07-13 A86AB5 AMS → IAH Jul 13, 09:35 UTCJul 13, 20:13 UTC10h 38m +35m +12m
2026-07-12 A884B6 - Jul 12, 09:25 UTCJul 12, 19:25 UTC10h 0m - -
2026-07-11 A8886D - Jul 11, 21:20 UTCJul 11, 22:05 UTC45m - -
2026-07-11 A8886D - Jul 11, 09:30 UTCJul 11, 20:05 UTC10h 35m - -
2026-07-10 A8AFEC - Jul 10, 09:15 UTCJul 10, 19:30 UTC10h 15m - -
2026-07-09 A89234 - Jul 9, 09:20 UTCJul 9, 19:40 UTC10h 20m - -
2026-07-08 A8A110 - Jul 8, 09:25 UTCJul 8, 19:30 UTC10h 5m - -
2026-07-07 A880FF AMS → IAH Jul 7, 09:40 UTCJul 7, 11:15 UTC1h 35m - -
2026-07-07 A880FF AMS → IAH Jul 7, 09:35 UTCJul 7, 19:48 UTC10h 13m +35m +1m
2026-07-06 A89D59 AMS → IAH Jul 6, 09:30 UTCJul 6, 19:45 UTC10h 15m - -
2026-07-05 A8B5FC AMS → IAH Jul 5, 09:30 UTCJul 5, 19:35 UTC10h 5m - -
2026-07-04 A87223 AMS → IAH Jul 4, 09:45 UTCJul 4, 20:20 UTC10h 35m - -
2026-07-03 A86AB5 AMS → IAH Jul 3, 20:05 UTCJul 3, 20:10 UTC5m - -
2026-07-03 A86AB5 AMS → IAH Jul 3, 11:10 UTCJul 3, 19:45 UTC8h 35m - -
2026-07-03 A86AB5 AMS → IAH Jul 3, 11:05 UTCJul 3, 19:38 UTC8h 33m +125m +15m
2026-07-02 A8B5FC AMS → IAH Jul 2, 09:40 UTCJul 2, 20:15 UTC10h 35m - -
2026-07-02 A8B5FC AMS → IAH Jul 2, 09:30 UTCJul 2, 20:10 UTC10h 40m +30m +13m
2026-07-01 A880FF AMS → IAH Jul 1, 10:30 UTCJul 1, 19:50 UTC9h 20m - -
2026-07-01 A880FF AMS → IAH Jul 1, 09:25 UTCJul 1, 10:25 UTC1h 0m - -
2026-06-30 A87223 AMS → IAH Jun 30, 09:30 UTCJun 30, 19:20 UTC9h 50m - -
2026-06-29 A89D59 AMS → IAH Jun 29, 09:25 UTCJun 29, 19:29 UTC10h 5m - -
2026-06-28 A8AFEC AMS → IAH Jun 28, 09:30 UTCJun 28, 19:21 UTC9h 51m +30m -10m
2026-06-28 A8AFEC AMS → IAH Jun 28, 09:30 UTCJun 28, 19:25 UTC9h 55m - -
2026-06-27 A884B6 AMS → IAH Jun 27, 09:34 UTCJun 27, 19:45 UTC10h 10m - -
2026-06-26 A8886D AMS → IAH Jun 26, 17:50 UTCJun 26, 19:39 UTC1h 50m - -
2026-06-26 A8886D AMS → IAH Jun 26, 09:35 UTCJun 26, 17:44 UTC8h 10m - -
2026-06-24 A89D59 AMS → IAH Jun 24, 09:29 UTCJun 24, 19:24 UTC9h 55m - -
2026-06-23 A8A110 AMS → IAH Jun 23, 09:20 UTCJun 23, 19:19 UTC10h 0m - -
2026-06-22 A87223 AMS → IAH Jun 22, 09:24 UTCJun 22, 19:44 UTC10h 20m - -

Performance history

Flights tracked
137 showing last 30
Avg arrival delay
+6m
On-time arrival
100% 100% on time
Aircraft used
10

Monthly activity 4 months

Month Flights tracked
July 2026 20
June 2026 40
May 2026 38
April 2026 39

UAL21 frequently asked

Where does flight UAL21 fly?
UAL21 (UAL) flies from AMS to IAH. View the full route page.
How long is flight UAL21?
Based on observed flights, UAL21 takes on average 8h 29m from takeoff to landing.
How often does UAL21 fly?
UAL21 has been observed flying several times a week in our tracking data. We've recorded 137 flights under this callsign.
Is flight UAL21 usually on time?
Across recent flights, UAL21 arrives with an average 6-minute delay. 100% of flights arrive within 15 minutes of schedule.
What aircraft operates flight UAL21?
UAL21 has been operated by 10 different aircraft in our records. Tail numbers are listed in the recent history below.
Can I track UAL21 live?
Yes. When UAL21 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.