Apparatus

Try JFK, AAL1290, BAW, or N225AN.

flight_takeoff Flight

UAL646

Operated by United Airlines

Live map

Live map filtered to UAL646. Shown when the flight is currently airborne.

Route airports View route page →

Departure

IAH KIAH VFR

George Bush Intercontinental Airport

Houston, US

Local time
00:22 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 300520Z 3006/3112 19005KT P6SM FEW045 BKN250 FM301100 VRB03KT P6SM SCT010 BKN028 FM301500 21006KT P6SM FEW015 SCT030 FM301800 17009KT P6SM SCT040 BKN250 FM310300 18006KT P6SM FEW030 BKN250 FM311000 00000KT P6SM BKN030

flight Live Traffic

flight_takeoff 270 Departures
flight_land 225 Arrivals

Arrival

SLP MMSP VFR

Ponciano Arriaga International Airport

San Luis Potosí, MX

Local time
23:22 CST
Timezone
America/Mexico_City
Type
Medium Airport
Elevation
6,035 ft
Coordinates
22.2620, -100.9357

cloud Weather

Wind
100° / 7 kt
Visibility
8 SM
Ceiling
FEW 23,000 ft
Temp / Dew
19°C / 15°C
Altimeter
30.19 inHg

Obs: 2026-05-30T04:40:00.000Z

Raw METAR / TAF 
METAR MMSP 300440Z 10007KT 8SM FEW230 19/15 A3019 RMK 8/001

TAF AMD MMSP 300135Z 3002/3100 09010G20KT P6SM SCT030 TX31/3022Z TN14/3012Z BECMG 3003/3004 10008KT SKC FM300700 00000KT P6SM SKC TEMPO 3011/3015 3SM BR HZ SCT020 FM301600 16006KT P6SM SCT020

Recent history last 30

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
2026-05-29 A0BF8C IAH → SLP May 29, 15:20 UTCMay 29, 19:15 UTC3h 55m - -
2026-05-26 A10E21 IAH → SLP May 26, 15:45 UTCMay 26, 19:30 UTC3h 45m - -
2026-05-25 A2C35B IAH → SLP May 25, 15:00 UTCMay 25, 19:25 UTC4h 24m - -
2026-05-24 A2C338 IAH → SLP May 24, 15:15 UTCMay 24, 16:30 UTC1h 15m - -
2026-05-24 A2C338 IAH → SLP May 24, 15:08 UTCMay 24, 16:42 UTC1h 34m +20m -8m
2026-05-22 A49F87 IAH → SLP May 22, 15:35 UTCMay 22, 16:50 UTC1h 15m - -
2026-05-20 A12A80 IAH → SLP May 20, 15:15 UTCMay 20, 16:55 UTC1h 40m - -
2026-05-19 A12B07 IAH → SLP May 19, 15:20 UTCMay 19, 17:10 UTC1h 50m - -
2026-05-18 A4491D IAH → SLP May 18, 15:25 UTCMay 18, 17:15 UTC1h 50m - -
2026-05-18 A4491D IAH → SLP May 18, 15:22 UTCMay 18, 17:13 UTC1h 51m +15m +10m
2026-05-17 A448D3 IAH → SLP May 17, 15:20 UTCMay 17, 17:05 UTC1h 45m - -
2026-05-16 A5D28C IAH → SLP May 16, 15:20 UTCMay 16, 17:05 UTC1h 45m - -
2026-05-15 A12A81 IAH → SLP May 15, 15:15 UTCMay 15, 17:00 UTC1h 45m - -
2026-05-14 A12AE3 IAH → SLP May 14, 15:25 UTCMay 14, 17:00 UTC1h 35m - -
2026-05-13 AA7F01 IAH → SLP May 13, 15:15 UTCMay 13, 17:05 UTC1h 50m - -
2026-05-12 A44964 IAH → SLP May 12, 16:05 UTCMay 12, 17:20 UTC1h 15m - -
2026-05-12 A44964 IAH → SLP May 12, 15:22 UTCMay 12, 17:19 UTC1h 57m +15m -33m
2026-05-12 A44964 IAH → SLP May 12, 15:40 UTCMay 12, 16:00 UTC20m - -
2026-05-11 A445AD IAH → SLP May 11, 15:25 UTCMay 11, 17:00 UTC1h 36m - -
2026-05-10 A12AE5 IAH → SLP May 10, 15:24 UTCMay 10, 16:59 UTC1h 35m - -
2026-05-09 A445CD IAH → SLP May 9, 16:15 UTCMay 9, 17:55 UTC1h 40m - -
2026-05-08 A445AB IAH → SLP May 8, 15:20 UTCMay 8, 16:55 UTC1h 35m - -
2026-05-08 A445AB IAH → SLP May 8, 15:22 UTCMay 8, 16:51 UTC1h 29m +15m -20m
2026-05-07 A44963 IAH → SLP May 7, 15:15 UTCMay 7, 17:00 UTC1h 45m - -
2026-05-07 A44963 IAH → SLP May 7, 15:22 UTCMay 7, 16:55 UTC1h 33m +15m -2m
2026-05-06 A44981 IAH → SLP May 6, 15:20 UTCMay 6, 17:05 UTC1h 45m - -
2026-05-05 A2BBCC IAH → SLP May 5, 15:20 UTCMay 5, 17:10 UTC1h 50m - -
2026-05-04 AA7F27 IAH → SLP May 4, 15:15 UTCMay 4, 17:00 UTC1h 45m - -
2026-05-03 A2BBF2 IAH → SLP May 3, 15:25 UTCMay 3, 16:30 UTC1h 5m - -
2026-05-03 A2BBF2 IAH → SLP May 3, 15:22 UTCMay 3, 16:58 UTC1h 36m +15m -6m

Performance history

Flights tracked
55 showing last 30
Avg arrival delay
-10m
On-time arrival
100% 100% on time
Aircraft used
23

Monthly activity 2 months

Month Flights tracked
May 2026 33
April 2026 22

UAL646 frequently asked

Where does flight UAL646 fly?
UAL646 (United Airlines) flies from IAH to SLP. View the full route page.
How long is flight UAL646?
Based on observed flights, UAL646 takes on average 1h 50m from takeoff to landing.
How often does UAL646 fly?
UAL646 has been observed flying several times a week in our tracking data. We've recorded 55 flights under this callsign.
Is flight UAL646 usually on time?
Across recent flights, UAL646 arrives 10 minutes early on average. 100% of flights arrive within 15 minutes of schedule.
What aircraft operates flight UAL646?
UAL646 has been operated by 23 different aircraft in our records. Tail numbers are listed in the recent history below.
Can I track UAL646 live?
Yes. When UAL646 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.