Apparatus

Try JFK, AAL1290, BAW, or N225AN.

flight_takeoff Flight

UAL639

Operated by UAL

Live map

Live map filtered to UAL639. Shown when the flight is currently airborne.

Route airports View route page →

Departure

RNO KRNO VFR

Reno Tahoe International Airport

Reno, US

Local time
23:57 PDT
Timezone
America/Los_Angeles
Type
Large Airport
Elevation
4,415 ft
Coordinates
39.4991, -119.7680

cloud Weather

Wind
250° / 7 kt
Visibility
10 SM
Ceiling
CLR
Temp / Dew
19°C / 0°C
Altimeter
30.07 inHg

Obs: 2026-08-30T05:55:00.000Z

Raw METAR / TAF 
METAR KRNO 300555Z 25007KT 10SM CLR 19/00 A3007 RMK AO2 SLP129 T01940000 10283 20194 51012 $

TAF KRNO 300540Z 3006/3106 30006KT P6SM SKC FM300700 VRB04KT P6SM SKC FM302100 10006KT P6SM FEW120 FM310000 32009KT P6SM FEW120 FM310400 31006KT P6SM SKC

flight Live Traffic

flight_takeoff 4 Departures
flight_land 9 Arrivals

Arrival

SFO KSFO VFR

San Francisco International Airport

San Francisco, US

Local time
23:57 PDT
Timezone
America/Los_Angeles
Type
Large Airport
Elevation
13 ft
Coordinates
37.6198, -122.3748

cloud Weather

Wind
270° / 12G26 kt
Visibility
10 SM
Ceiling
FEW 1,000 ft
Temp / Dew
16°C / 12°C
Altimeter
29.94 inHg

Obs: 2026-08-30T05:56:00.000Z

Raw METAR / TAF 
METAR KSFO 300556Z 27012G26KT 10SM FEW010 16/12 A2994 RMK AO2 PK WND 26028/0533 SLP137 T01610117 10200 20161 50001 $

TAF KSFO 300520Z 3006/3112 28016G25KT P6SM SKC FM300700 28010KT P6SM FEW009 TEMPO 3011/3015 BKN009 FM301900 27015G25KT P6SM FEW012 FM310400 27010KT P6SM FEW010 FM311000 27008KT P6SM BKN010

flight Live Traffic

flight_takeoff 100 Departures
flight_land 58 Arrivals

Recent history last 30

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
2026-07-25 A12EE0 DEN → MSO Jul 25, 22:45 UTCJul 26, 04:20 UTC5h 35m - -
2026-07-24 A12AA5 DEN → MSO Jul 24, 22:45 UTCJul 25, 03:55 UTC5h 10m +19m -4m
2026-07-24 A12AA5 DEN → MSO Jul 24, 22:40 UTCJul 25, 04:05 UTC5h 25m - -
2026-07-23 A449A3 DEN → MSO Jul 23, 23:45 UTCJul 24, 05:10 UTC5h 25m - -
2026-07-22 A44938 DEN → MSO Jul 22, 23:05 UTCJul 23, 04:40 UTC5h 35m - -
2026-07-22 A5D2D4 DEN → MSO Jul 22, 02:30 UTCJul 22, 05:25 UTC2h 55m - -
2026-07-20 AA7F4E DEN → MSO Jul 20, 23:25 UTCJul 21, 04:50 UTC5h 24m - -
2026-07-19 A12AA0 DEN → MSO Jul 19, 22:55 UTCJul 20, 04:05 UTC5h 10m - -
2026-07-19 A75FBF DEN → MSO Jul 19, 00:15 UTCJul 19, 05:35 UTC5h 20m - -
2026-07-17 A12E80 DEN → MSO Jul 17, 23:30 UTCJul 18, 04:45 UTC5h 16m - -
2026-07-17 A12E80 DEN → MSO Jul 17, 23:09 UTCJul 18, 04:36 UTC5h 27m +43m -16m
2026-07-16 A448F5 DEN → MSO Jul 16, 23:05 UTCJul 17, 04:29 UTC5h 25m - -
2026-07-15 AA7F24 - Jul 15, 23:00 UTCJul 16, 04:30 UTC5h 30m - -
2026-07-14 A5D2D4 - Jul 14, 23:10 UTCJul 15, 04:25 UTC5h 15m - -
2026-07-14 A5D2D4 BOS → LAX Jul 14, 22:45 UTCJul 15, 04:15 UTC5h 30m +19m -25m
2026-07-13 A44939 - Jul 13, 23:00 UTCJul 14, 04:05 UTC5h 5m - -
2026-07-13 A12AC3 - Jul 13, 00:20 UTCJul 13, 05:31 UTC5h 10m - -
2026-07-11 A449A4 - Jul 11, 23:40 UTCJul 12, 04:55 UTC5h 15m - -
2026-07-11 A449CB - Jul 11, 00:30 UTCJul 11, 06:01 UTC5h 30m - -
2026-07-11 A449CB BOS → LAX Jul 11, 00:19 UTCJul 11, 05:55 UTC5h 36m +113m +15m
2026-07-10 A445A4 - Jul 10, 00:40 UTCJul 10, 06:35 UTC5h 55m - -
2026-07-09 A445A4 BOS → LAX Jul 9, 23:47 UTCJul 10, 06:26 UTC6h 39m +81m -49m
2026-07-08 AA7F46 - Jul 8, 23:15 UTCJul 9, 04:40 UTC5h 25m - -
2026-07-07 A5D6F9 - Jul 7, 23:15 UTCJul 8, 04:40 UTC5h 25m - -
2026-07-06 A448D6 - Jul 6, 23:00 UTCJul 7, 04:25 UTC5h 25m - -
2026-07-06 A2BBF2 - Jul 6, 00:40 UTCJul 6, 06:05 UTC5h 25m - -
2026-07-05 A2BBF2 BOS → LAX Jul 5, 22:55 UTCJul 6, 05:59 UTC7h 4m +19m -122m
2026-07-04 ABFBD0 - Jul 4, 16:00 UTCJul 4, 20:25 UTC4h 25m - -
2026-07-03 AA7F06 - Jul 3, 23:05 UTCJul 4, 04:50 UTC5h 45m - -
2026-07-03 AA7F06 BOS → BOS Jul 3, 22:35 UTCJul 3, 22:40 UTC5m - -

Performance history

Flights tracked
142 showing last 30
Avg arrival delay
-33m
On-time arrival
100% 100% on time
Aircraft used
22

Monthly activity 4 months

Month Flights tracked
July 2026 33
June 2026 37
May 2026 36
April 2026 36

UAL639 frequently asked

Where does flight UAL639 fly?
UAL639 (UAL) flies from RNO to SFO. View the full route page.
How long is flight UAL639?
Based on observed flights, UAL639 takes on average 5h 13m from takeoff to landing.
How often does UAL639 fly?
UAL639 has been observed flying several times a week in our tracking data. We've recorded 142 flights under this callsign.
Is flight UAL639 usually on time?
Across recent flights, UAL639 arrives 33 minutes early on average. 100% of flights arrive within 15 minutes of schedule.
What aircraft operates flight UAL639?
UAL639 has been operated by 22 different aircraft in our records. Tail numbers are listed in the recent history below.
Can I track UAL639 live?
Yes. When UAL639 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.