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
02:40 GMT+2
Timezone
Europe/Amsterdam
Type
Large Airport
Elevation
-11 ft
Coordinates
52.3086, 4.7639

cloud Weather

Wind
110° / 7 kt
Visibility
6 SM
Ceiling
CAVOK
Temp / Dew
8°C / 5°C
Altimeter
30.15 inHg

Obs: 2026-04-15T00:25:00.000Z

Raw METAR / TAF 
METAR EHAM 150025Z 11007KT CAVOK 08/05 Q1021 NOSIG

TAF EHAM 142302Z 1500/1606 13006KT CAVOK BECMG 1508/1511 17013KT BECMG 1515/1518 20007KT PROB30 TEMPO 1520/1524 7000 -RADZ BKN017

flight Live Traffic

flight_takeoff 14 Departures
flight_land 32 Arrivals

Arrival

IAH KIAH VFR

George Bush Intercontinental Airport

Houston, US

Local time
19:40 CDT
Timezone
America/Chicago
Type
Large Airport
Elevation
97 ft
Coordinates
29.9844, -95.3414

cloud Weather

Wind
130° / 16G23 kt
Visibility
10 SM
Ceiling
FEW 3,200 ft, FEW 4,300 ft
Temp / Dew
26°C / 21°C
Altimeter
29.99 inHg

Obs: 2026-04-14T23:53:00.000Z

Raw METAR / TAF 
METAR KIAH 142353Z 13016G23KT 10SM FEW032 FEW043 26/21 A2999 RMK AO2 SLP155 T02560211 10289 20256 55006

TAF KIAH 142323Z 1500/1606 13014G24KT P6SM FEW035 SCT050 FM150200 15012KT P6SM SCT030 BKN040 FM150800 16006KT P6SM BKN015 BKN025 FM151400 17010KT P6SM SCT020 BKN025 FM151700 17014G24KT P6SM SCT035 BKN050 FM160400 16008KT P6SM SCT020 BKN035

flight Live Traffic

flight_takeoff 265 Departures
flight_land 283 Arrivals

Recent history last 6

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
2026-04-14 A8A4C7 AMS → IAH Apr 14, 09:20 UTCApr 14, 20:08 UTC10h 48m +20m +6m
2026-04-13 A89234 AMS → IAH Apr 13, 19:50 UTCApr 13, 21:10 UTC1h 20m - -
2026-04-13 A89234 AMS → IAH Apr 13, 17:50 UTCApr 13, 20:10 UTC2h 20m - -
2026-04-13 A89234 AMS → IAH Apr 13, 12:05 UTCApr 13, 12:25 UTC20m - -
2026-04-13 A89234 AMS → IAH Apr 13, 09:20 UTCApr 13, 19:49 UTC10h 29m +20m +6m
2026-04-12 A87223 AMS → IAH Apr 12, 17:15 UTCApr 12, 20:15 UTC3h 0m - -

Performance history

Flights tracked
6
Avg arrival delay
+6m
On-time arrival
100% 100% on time
Aircraft used
3

Monthly activity 1 month

Month Flights tracked
April 2026 6

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 4h 43m from takeoff to landing.
How often does UAL21 fly?
UAL21 has been observed flying occasionally in our tracking data. We've recorded 6 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 3 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.