Apparatus

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flight_takeoff Flight

UAL21

Operated by UAL

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
07:02 GMT+2
Timezone
Europe/Amsterdam
Type
Large Airport
Elevation
-11 ft
Coordinates
52.3086, 4.7639

cloud Weather

Wind
80° / 2 kt
Visibility
6 SM
Ceiling
CLR
Temp / Dew
14°C / 13°C
Altimeter
30.15 inHg
Wx
MIFG

Obs: 2026-05-30T04:55:00.000Z

Raw METAR / TAF 
METAR EHAM 300455Z 08002KT 9999 MIFG NSC 14/13 Q1021 NOSIG

TAF EHAM 292313Z 3000/3106 VRB02KT 9999 MIFG NSC PROB30 TEMPO 3001/3005 4000 BCFG BECMG 3005/3008 13006KT NSW BECMG 3015/3018 05010KT PROB30 TEMPO 3100/3106 6000 SHRA TSRA FEW050CB BECMG 3103/3106 21005KT

flight Live Traffic

flight_takeoff 20 Departures
flight_land 34 Arrivals

Arrival

IAH KIAH VFR

George Bush Intercontinental Airport

Houston, US

Local time
00:02 CDT
Timezone
America/Chicago
Type
Large Airport
Elevation
97 ft
Coordinates
29.9844, -95.3414

cloud Weather

Wind
190° / 4 kt
Visibility
10 SM
Ceiling
CLR
Temp / Dew
26°C / 23°C
Altimeter
29.88 inHg

Obs: 2026-05-30T04:53:00.000Z

Raw METAR / TAF 
METAR KIAH 300453Z 19004KT 10SM CLR 26/23 A2988 RMK AO2 SLP118 T02610228

TAF KIAH 292320Z 3000/3106 VRB05KT P6SM SCT050 BKN250 FM301100 VRB03KT P6SM SCT010 FM301500 21006KT P6SM FEW025 FM301800 17009KT P6SM SCT040 BKN250 FM310300 18006KT P6SM FEW030 BKN250

flight Live Traffic

flight_takeoff 286 Departures
flight_land 230 Arrivals

Recent history last 30

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
2026-05-29 A884B6 AMS → IAH May 29, 09:25 UTCMay 29, 19:30 UTC10h 5m - -
2026-05-29 A884B6 AMS → IAH May 29, 09:25 UTCMay 29, 19:26 UTC10h 1m +25m -10m
2026-05-28 A8AFEC AMS → IAH May 28, 09:40 UTCMay 28, 19:15 UTC9h 35m - -
2026-05-27 A8A110 AMS → IAH May 27, 09:50 UTCMay 27, 20:05 UTC10h 15m - -
2026-05-26 A86AB5 AMS → IAH May 26, 09:15 UTCMay 26, 19:40 UTC10h 25m - -
2026-05-25 A86E6C AMS → IAH May 25, 09:20 UTCMay 25, 19:41 UTC10h 21m +20m -5m
2026-05-25 A86E6C AMS → IAH May 25, 09:20 UTCMay 25, 19:40 UTC10h 19m - -
2026-05-24 A89234 AMS → IAH May 24, 09:20 UTCMay 24, 19:45 UTC10h 25m - -
2026-05-23 A89D59 AMS → IAH May 23, 09:20 UTCMay 23, 20:16 UTC10h 56m +20m +20m
2026-05-23 A89D59 AMS → IAH May 23, 09:25 UTCMay 23, 20:00 UTC10h 36m - -
2026-05-21 A8B5FC AMS → IAH May 21, 09:05 UTCMay 21, 19:35 UTC10h 30m - -
2026-05-20 A8AFEC AMS → IAH May 20, 09:15 UTCMay 20, 19:40 UTC10h 25m - -
2026-05-19 A8A4C7 AMS → IAH May 19, 09:15 UTCMay 19, 19:20 UTC10h 5m - -
2026-05-18 A8B5FC AMS → IAH May 18, 09:35 UTCMay 18, 19:45 UTC10h 9m - -
2026-05-18 A8B5FC AMS → IAH May 18, 09:25 UTCMay 18, 19:46 UTC10h 21m +25m +2m
2026-05-17 A87223 AMS → IAH May 17, 09:20 UTCMay 17, 19:50 UTC10h 30m - -
2026-05-16 A880FF AMS → IAH May 16, 09:16 UTCMay 16, 19:35 UTC10h 20m - -
2026-05-15 A8A4C7 AMS → IAH May 15, 09:40 UTCMay 15, 19:45 UTC10h 4m - -
2026-05-14 A8AFEC AMS → IAH May 14, 09:25 UTCMay 14, 19:20 UTC9h 55m - -
2026-05-13 A880FF AMS → IAH May 13, 09:05 UTCMay 13, 19:20 UTC10h 15m - -
2026-05-12 A89D59 AMS → IAH May 12, 09:40 UTCMay 12, 20:10 UTC10h 30m - -
2026-05-11 A89234 AMS → IAH May 11, 09:05 UTCMay 11, 19:35 UTC10h 31m - -
2026-05-10 A8B5FC AMS → IAH May 10, 09:20 UTCMay 10, 19:45 UTC10h 25m - -
2026-05-09 A884B6 AMS → IAH May 9, 09:20 UTCMay 9, 19:49 UTC10h 30m - -
2026-05-08 A880FF AMS → IAH May 8, 09:30 UTCMay 8, 20:00 UTC10h 30m - -
2026-05-07 A8A4C7 AMS → IAH May 7, 09:30 UTCMay 7, 19:45 UTC10h 15m - -
2026-05-07 A8A4C7 AMS → IAH May 7, 09:25 UTCMay 7, 19:55 UTC10h 30m +25m -4m
2026-05-06 A87223 AMS → IAH May 6, 11:55 UTCMay 6, 22:25 UTC10h 30m - -
2026-05-05 A89234 AMS → IAH May 5, 09:25 UTCMay 5, 19:40 UTC10h 15m - -
2026-05-04 A86E6C AMS → IAH May 4, 09:25 UTCMay 4, 19:40 UTC10h 16m - -

Performance history

Flights tracked
73 showing last 30
Avg arrival delay
+1m
On-time arrival
80% 80% on time
Aircraft used
11

Monthly activity 2 months

Month Flights tracked
May 2026 34
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 10h 19m from takeoff to landing.
How often does UAL21 fly?
UAL21 has been observed flying daily in our tracking data. We've recorded 73 flights under this callsign.
Is flight UAL21 usually on time?
Across recent flights, UAL21 arrives with an average 1-minute delay. 80% of flights arrive within 15 minutes of schedule.
What aircraft operates flight UAL21?
UAL21 has been operated by 11 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.