Apparatus

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flight_takeoff Flight

UAL577

Operated by United Airlines

Live map

Live map filtered to UAL577. Shown when the flight is currently airborne.

Route airports View route page →

Departure

IAD KIAD VFR

Washington Dulles International Airport

Dulles, US

Local time
20:48 EDT
Timezone
America/New_York
Type
Large Airport
Elevation
312 ft
Coordinates
38.9445, -77.4558

cloud Weather

Wind
300° / 4 kt
Visibility
10 SM
Ceiling
FEW 10,000 ft, SCT 20,000 ft
Temp / Dew
20°C / 14°C
Altimeter
29.94 inHg

Obs: 2026-10-12T23:52:00.000Z

Raw METAR / TAF 
METAR KIAD 122352Z 30004KT 10SM FEW100 SCT200 20/14 A2994 RMK AO2 SLP136 T02000144 10244 20200 53008 $

TAF KIAD 122333Z 1300/1406 29005KT P6SM FEW100 SCT200 FM130900 00000KT 5SM BR FEW200 FM131300 19006KT P6SM SCT250

flight Live Traffic

flight_takeoff 147 Departures
flight_land 126 Arrivals

Arrival

DEN KDEN VFR

Denver International Airport

Denver, US

Local time
18:48 MDT
Timezone
America/Denver
Type
Large Airport
Elevation
5,431 ft
Coordinates
39.8600, -104.6738

cloud Weather

Wind
190° / 18G26 kt
Visibility
10 SM
Ceiling
SCT 12,000 ft
Temp / Dew
24°C / 0°C
Altimeter
29.79 inHg

Obs: 2026-10-12T23:53:00.000Z

Raw METAR / TAF 
METAR KDEN 122353Z 19018G26KT 10SM SCT120 24/00 A2979 RMK AO2 PK WND 18029/2305 SLP014 T02440000 10278 20244 55004

TAF KDEN 122339Z 1300/1406 20014G22KT P6SM FEW090 FEW130 FM130300 23010G20KT P6SM FEW120 FM130500 30010KT P6SM FEW020 SCT040 FM131100 01006KT P6SM BKN010 BKN030 TEMPO 1312/1315 5SM BR BKN005 FM131700 04007KT P6SM SCT020 BKN040 FM132000 07010G20KT P6SM FEW040 SCT100 FM140200 05009KT P6SM VCSH SCT050

warning FAA Advisories

  • Ground Delay: runway construction (avg 56 minutes)

flight Live Traffic

flight_takeoff 336 Departures
flight_land 358 Arrivals

Recent history last 30

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
2026-07-26 A0B844 IAD → DEN Jul 26, 17:40 UTCJul 26, 21:15 UTC3h 35m - -
2026-07-26 A41E94 IAD → DEN Jul 26, 12:05 UTCJul 26, 14:15 UTC2h 10m - -
2026-07-25 A0B849 IAD → DEN Jul 25, 17:40 UTCJul 25, 21:10 UTC3h 30m - -
2026-07-25 A445EE IAD → DEN Jul 25, 11:50 UTCJul 25, 13:55 UTC2h 5m - -
2026-07-24 A0B844 IAD → DEN Jul 24, 17:40 UTCJul 24, 21:10 UTC3h 30m - -
2026-07-24 A4491C IAD → DEN Jul 24, 11:50 UTCJul 24, 14:00 UTC2h 10m - -
2026-07-24 A4491C IAD → DEN Jul 24, 11:55 UTCJul 24, 13:54 UTC1h 59m -335m -5m
2026-07-23 A0B81D IAD → DEN Jul 23, 18:00 UTCJul 23, 21:45 UTC3h 45m - -
2026-07-23 AA7F25 IAD → DEN Jul 23, 11:55 UTCJul 23, 14:15 UTC2h 20m - -
2026-07-23 AA7F25 IAD → DEN Jul 23, 11:55 UTCJul 23, 14:07 UTC2h 12m +15m -6m
2026-07-22 A0B867 IAD → DEN Jul 22, 17:50 UTCJul 22, 21:40 UTC3h 50m - -
2026-07-22 A5D28C IAD → DEN Jul 22, 12:00 UTCJul 22, 14:10 UTC2h 10m - -
2026-07-22 A5D28C IAD → DEN Jul 22, 11:55 UTCJul 22, 14:09 UTC2h 14m +15m +11m
2026-07-22 A0B81D IAD → DEN Jul 22, 02:15 UTCJul 22, 05:25 UTC3h 10m - -
2026-07-21 A94BFC IAD → DEN Jul 21, 12:55 UTCJul 21, 15:15 UTC2h 20m - -
2026-07-20 A2452A IAD → DEN Jul 20, 17:55 UTCJul 20, 21:30 UTC3h 35m - -
2026-07-20 A12A9E IAD → DEN Jul 20, 12:00 UTCJul 20, 14:10 UTC2h 10m - -
2026-07-20 A12A9E IAD → DEN Jul 20, 11:55 UTCJul 20, 14:04 UTC2h 9m +15m -5m
2026-07-19 A55FA2 IAD → DEN Jul 19, 18:55 UTCJul 19, 22:25 UTC3h 30m - -
2026-07-19 A44560 IAD → DEN Jul 19, 11:50 UTCJul 19, 13:55 UTC2h 5m - -
2026-07-18 A44939 IAD → DEN Jul 18, 11:55 UTCJul 18, 14:20 UTC2h 25m - -
2026-07-17 A245B7 IAD → DEN Jul 17, 17:50 UTCJul 17, 21:10 UTC3h 20m - -
2026-07-17 A2B83B IAD → DEN Jul 17, 11:55 UTCJul 17, 14:00 UTC2h 5m - -
2026-07-16 A0B867 IAD → DEN Jul 16, 17:40 UTCJul 16, 21:05 UTC3h 25m - -
2026-07-16 A4495D MCO → EWR Jul 16, 11:54 UTCJul 16, 14:05 UTC2h 10m - -
2026-07-15 A0B88F EWR → DEN Jul 15, 17:52 UTCJul 15, 21:05 UTC3h 13m +22m -4m
2026-07-15 A0B88F - Jul 15, 17:50 UTCJul 15, 21:10 UTC3h 20m - -
2026-07-15 A94B2E MCO → EWR Jul 15, 13:25 UTCJul 15, 15:35 UTC2h 10m - -
2026-07-14 A2454F EWR → DEN Jul 14, 17:50 UTCJul 14, 21:00 UTC3h 10m - -
2026-07-14 AC0831 MCO → EWR Jul 14, 11:50 UTCJul 14, 14:05 UTC2h 15m - -

Performance history

Flights tracked
168 showing last 30
Avg arrival delay
-2m
On-time arrival
100% 100% on time
Aircraft used
22

Monthly activity 4 months

Month Flights tracked
July 2026 63
June 2026 42
May 2026 40
April 2026 23

UAL577 frequently asked

Where does flight UAL577 fly?
UAL577 (United Airlines) flies from IAD to DEN. View the full route page.
How long is flight UAL577?
Based on observed flights, UAL577 takes on average 2h 44m from takeoff to landing.
How often does UAL577 fly?
UAL577 has been observed flying several times a week in our tracking data. We've recorded 168 flights under this callsign.
Is flight UAL577 usually on time?
Across recent flights, UAL577 arrives 2 minutes early on average. 100% of flights arrive within 15 minutes of schedule.
What aircraft operates flight UAL577?
UAL577 has been operated by 22 different aircraft in our records. Tail numbers are listed in the recent history below.
Can I track UAL577 live?
Yes. When UAL577 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.