Apparatus

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flight_takeoff Flight

UAL21

Operated by United Airlines

Live map

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

Route airports View route page →

Departure

AMS EHAM VFR

Amsterdam Airport Schiphol

Amsterdam, NL

Local time
12:42 GMT+2
Timezone
Europe/Amsterdam
Type
Large Airport
Elevation
-11 ft
Coordinates
52.3086, 4.7639

cloud Weather

Wind
210° / 11 kt
Visibility
6 SM
Ceiling
FEW 1,000 ft
Temp / Dew
21°C / 16°C
Altimeter
29.70 inHg

Obs: 2026-08-28T10:25:00.000Z

Raw METAR / TAF 
METAR EHAM 281025Z 21011KT 180V240 9999 FEW010 21/16 Q1006 NOSIG

TAF EHAM 280436Z 2806/2912 21012KT 9999 FEW009 SCT016 PROB30 TEMPO 2806/2809 5000 BKN016 TEMPO 2812/2816 6000 SHRA SCT025CB BKN040 PROB30 TEMPO 2813/2816 22018G28KT 4000 TSRA BKN018 SCT022CB PROB30 TEMPO 2816/2821 6000 SHRA FEW020CB TEMPO 2821/2911 6000 SHRA RA BKN014 SCT020CB PROB30 TEMPO 2822/2901 22017G27KT 4000 TSRA FEW006 BKN014 SCT018CB

flight Live Traffic

flight_takeoff 11 Departures
flight_land 26 Arrivals

Arrival

IAH KIAH VFR

George Bush Intercontinental Airport

Houston, US

Local time
05:42 CDT
Timezone
America/Chicago
Type
Large Airport
Elevation
97 ft
Coordinates
29.9844, -95.3414

cloud Weather

Wind
50° / 16G25 kt
Visibility
7 SM
Ceiling
SCT 2,700 ft, BKN 5,000 ft, OVC 7,000 ft
Temp / Dew
24°C / 21°C
Altimeter
30.02 inHg
Wx
TSRA

Obs: 2026-08-28T09:53:00.000Z

Raw METAR / TAF 
METAR KIAH 280953Z 05016G25KT 7SM TSRA SCT027CB BKN050 OVC070 24/21 A3002 RMK AO2 PK WND 04027/0934 RAB48 TSB11 SLP165 CONS LTGICCG OHD TS OHD MOV SW P0002 T02390206

TAF KIAH 280839Z 2809/2912 VRB05KT P6SM VCTS SCT030CB SCT100 TEMPO 2809/2811 VRB10G20KT -TSRA FM281100 VRB05KT P6SM FEW080 SCT250 FM282200 13006KT P6SM SCT250 FM290300 VRB05KT P6SM FEW030

flight Live Traffic

flight_takeoff 176 Departures
flight_land 169 Arrivals

Recent history last 30

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
2026-07-26 A8886D AMS → IAH Jul 26, 09:45 UTCJul 26, 19:55 UTC10h 10m - -
2026-07-25 A87223 AMS → IAH Jul 25, 09:50 UTCJul 25, 19:45 UTC9h 55m - -
2026-07-24 A875DA AMS → IAH Jul 24, 09:15 UTCJul 24, 19:25 UTC10h 10m - -
2026-07-23 A86AB5 AMS → IAH Jul 23, 09:30 UTCJul 23, 20:00 UTC10h 30m - -
2026-07-22 A8A4C7 AMS → IAH Jul 22, 10:20 UTCJul 22, 19:30 UTC9h 10m - -
2026-07-21 A8A4C7 AMS → IAH Jul 21, 23:50 UTCJul 22, 19:30 UTC19h 40m - -
2026-07-21 A8B5FC - Jul 21, 14:35 UTCJul 22, 00:25 UTC9h 50m - -
2026-07-20 A86E6C - Jul 20, 09:25 UTCJul 20, 19:20 UTC9h 55m - -
2026-07-19 A89D59 - Jul 19, 09:30 UTCJul 19, 19:05 UTC9h 35m - -
2026-07-18 A875DA - Jul 18, 10:15 UTCJul 18, 20:25 UTC10h 10m - -
2026-07-17 A884B6 - Jul 17, 10:15 UTCJul 17, 11:30 UTC1h 15m - -
2026-07-17 A884B6 AMS → IAH Jul 17, 10:12 UTCJul 17, 20:00 UTC9h 48m +72m +5m
2026-07-16 A86E6C - Jul 16, 09:25 UTCJul 16, 19:25 UTC10h 0m - -
2026-07-15 A875DA - Jul 15, 09:30 UTCJul 15, 19:35 UTC10h 5m - -
2026-07-14 A8AFEC - Jul 14, 10:00 UTCJul 14, 19:35 UTC9h 35m - -
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 - -

Performance history

Flights tracked
152 showing last 30
Avg arrival delay
+6m
On-time arrival
100% 100% on time
Aircraft used
13

Monthly activity 4 months

Month Flights tracked
July 2026 35
June 2026 40
May 2026 38
April 2026 39

UAL21 frequently asked

Where does flight UAL21 fly?
UAL21 (United Airlines) flies from AMS to IAH. View the full route page.
How long is flight UAL21?
Based on observed flights, UAL21 takes on average 9h 8m 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 152 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 13 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.