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
16:30 GMT+2
Timezone
Europe/Amsterdam
Type
Large Airport
Elevation
-11 ft
Coordinates
52.3086, 4.7639

cloud Weather

Wind
150° / 9 kt
Visibility
6 SM
Ceiling
CAVOK
Temp / Dew
16°C / 7°C
Altimeter
30.09 inHg

Obs: 2026-10-12T13:55:00.000Z

Raw METAR / TAF 
METAR EHAM 121355Z 15009KT CAVOK 16/07 Q1019 NOSIG

TAF EHAM 121121Z 1212/1318 16010KT 9999 FEW045 PROB30 TEMPO 1221/1301 7000 -RADZ BECMG 1301/1304 6000 -RADZ SCT012 BKN018 BECMG 1304/1307 SCT006 BKN012 BECMG 1307/1310 21012KT 4000 -DZRA BR BKN006 BECMG 1312/1315 24015KT 9999 NSW SCT020 BECMG 1315/1318 29010KT

flight Live Traffic

flight_takeoff 12 Departures
flight_land 5 Arrivals

Arrival

IAH KIAH VFR

George Bush Intercontinental Airport

Houston, US

Local time
09:30 CDT
Timezone
America/Chicago
Type
Large Airport
Elevation
97 ft
Coordinates
29.9844, -95.3414

cloud Weather

Wind
110° / 3 kt
Visibility
10 SM
Ceiling
SCT 2,800 ft, OVC 24,000 ft
Temp / Dew
24°C / 23°C
Altimeter
30.04 inHg

Obs: 2026-10-12T13:53:00.000Z

Raw METAR / TAF 
METAR KIAH 121353Z 11003KT 10SM SCT028 OVC240 24/23 A3004 RMK AO2 SLP171 T02440228

TAF KIAH 121120Z 1212/1318 12006KT P6SM SCT025 SCT250 FM121600 14012KT P6SM SCT035 BKN250 PROB30 1218/1221 -SHRA FM122100 14013G20KT P6SM SCT100 FM130300 14006KT P6SM SCT015 OVC050 TEMPO 1310/1313 OVC015

flight Live Traffic

flight_takeoff 340 Departures
flight_land 219 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 (UAL) 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.