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flight_takeoff Flight

UAL639

Operated by United Airlines

Live map

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

Route airports View route page →

Departure

DEN KDEN VFR

Denver International Airport

Denver, US

Local time
01:11 MDT
Timezone
America/Denver
Type
Large Airport
Elevation
5,431 ft
Coordinates
39.8600, -104.6738

cloud Weather

Wind
120° / 6 kt
Visibility
10 SM
Ceiling
SCT 7,500 ft, BKN 10,000 ft, BKN 20,000 ft
Temp / Dew
4°C / -1°C
Altimeter
29.87 inHg

Obs: 2026-04-15T06:53:00.000Z

Raw METAR / TAF 
METAR KDEN 150653Z 12006KT 10SM SCT075 BKN100 BKN200 04/M01 A2987 RMK AO2 SLP085 T00391006 401610039

TAF KDEN 150528Z 1506/1612 21011KT P6SM SCT060 BKN090 FM150800 22010KT P6SM FEW090 SCT200 FM151500 25009KT P6SM FEW100 FM152000 30010KT P6SM FEW100 FM160300 21009KT P6SM SCT200

flight Live Traffic

flight_takeoff 93 Departures
flight_land 119 Arrivals

Arrival

MSO KMSO VFR

Missoula Montana Airport

Missoula, US

Local time
01:11 MDT
Timezone
America/Denver
Type
Medium Airport
Elevation
3,206 ft
Coordinates
46.9158, -114.0911

cloud Weather

Wind
0° / 0 kt
Visibility
10 SM
Ceiling
FEW 3,400 ft, BKN 4,400 ft, OVC 5,500 ft
Temp / Dew
6°C / 0°C
Altimeter
29.83 inHg
Wx
-RA

Obs: 2026-04-15T06:53:00.000Z

Raw METAR / TAF 
METAR KMSO 150653Z AUTO 00000KT 10SM -RA FEW034 BKN044 OVC055 06/00 A2983 RMK AO2 RAB34 SLP103 P0000 T00610000 401440017

TAF KMSO 150539Z 1506/1606 36007KT P6SM VCSH OVC040 FM151600 22015G25KT 6SM -SHRA OVC025 FM152200 31015G25KT 6SM -SHRASN OVC035 TEMPO 1523/1601 2SM -SN OVC025 FM160200 30010G18KT 6SM -SHSN BKN080

flight Live Traffic

flight_takeoff 4 Departures
flight_land 5 Arrivals

Recent history last 5

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
2026-04-13 A12E80 DEN → MSO Apr 13, 22:11 UTCApr 14, 04:18 UTC6h 7m +16m +11m
2026-04-13 AA7AA0 DEN → MSO Apr 13, 04:20 UTCApr 13, 04:40 UTC20m - -
2026-04-13 AA7AA0 DEN → MSO Apr 13, 03:55 UTCApr 13, 04:40 UTC45m - -
2026-04-13 AA7AA0 DEN → MSO Apr 13, 00:20 UTCApr 13, 04:15 UTC3h 55m - -
2026-04-12 AA7AA0 DEN → MSO Apr 12, 23:55 UTCApr 13, 03:50 UTC3h 55m - -

Performance history

Flights tracked
5
Avg arrival delay
+11m
On-time arrival
100% 100% on time
Aircraft used
2

Monthly activity 1 month

Month Flights tracked
April 2026 5

UAL639 frequently asked

Where does flight UAL639 fly?
UAL639 (United Airlines) flies from DEN to MSO. View the full route page.
How long is flight UAL639?
Based on observed flights, UAL639 takes on average 3h 0m from takeoff to landing.
How often does UAL639 fly?
UAL639 has been observed flying occasionally in our tracking data. We've recorded 5 flights under this callsign.
Is flight UAL639 usually on time?
Across recent flights, UAL639 arrives with an average 11-minute delay. 100% of flights arrive within 15 minutes of schedule.
What aircraft operates flight UAL639?
UAL639 has been operated by 2 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.