Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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
03:18 EDT
Timezone
America/New_York
Type
Large Airport
Elevation
312 ft
Coordinates
38.9445, -77.4558

cloud Weather

Wind
0° / 0 kt
Visibility
10 SM
Ceiling
FEW 25,000 ft
Temp / Dew
13°C / 11°C
Altimeter
29.81 inHg

Obs: 2026-05-30T06:52:00.000Z

Raw METAR / TAF 
METAR KIAD 300652Z 00000KT 10SM FEW250 13/11 A2981 RMK AO2 SLP093 T01330106

TAF KIAD 300538Z 3006/3112 00000KT P6SM FEW250 FM300800 33007G15KT P6SM FEW250 FM301200 36011G21KT P6SM SKC FM302300 01011KT P6SM SKC FM310100 02006KT P6SM SKC FM310700 35003KT P6SM SKC

flight Live Traffic

flight_takeoff 42 Departures
flight_land 51 Arrivals

Arrival

DEN KDEN VFR

Denver International Airport

Denver, US

Local time
01:18 MDT
Timezone
America/Denver
Type
Large Airport
Elevation
5,431 ft
Coordinates
39.8600, -104.6738

cloud Weather

Wind
260° / 8 kt
Visibility
10 SM
Ceiling
FEW 10,000 ft, FEW 20,000 ft
Temp / Dew
14°C / 8°C
Altimeter
29.80 inHg

Obs: 2026-05-30T06:53:00.000Z

Raw METAR / TAF 
METAR KDEN 300653Z 26008KT 10SM FEW100 FEW200 14/08 A2980 RMK AO2 SLP015 T01390078 402830128

TAF KDEN 300538Z 3006/3112 VRB06KT P6SM FEW100 SCT200 FM300900 25006KT P6SM FEW100 SCT200 FM301400 28009KT P6SM SCT180 FM302100 33010KT P6SM VCSH SCT100 PROB30 3021/3101 VRB15G25KT -SHRA FM310300 27013KT P6SM FEW080 SCT100 FM310700 23011KT P6SM FEW100 SCT200

flight Live Traffic

flight_takeoff 188 Departures
flight_land 157 Arrivals

Recent history last 30

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
2026-05-30 A0B86C IAD → DEN May 30, 00:20 UTCMay 30, 00:50 UTC30m - -
2026-05-29 A0B86C IAD → DEN May 29, 17:35 UTCMay 29, 22:20 UTC4h 45m - -
2026-05-28 A0B7B8 IAD → DEN May 28, 17:40 UTCMay 28, 21:05 UTC3h 25m - -
2026-05-27 A0B820 IAD → DEN May 27, 17:40 UTCMay 27, 21:35 UTC3h 55m - -
2026-05-26 A0B801 IAD → DEN May 26, 17:44 UTCMay 26, 21:14 UTC3h 30m - -
2026-05-26 A0B801 IAD → DEN May 26, 17:47 UTCMay 26, 21:12 UTC3h 25m +22m -7m
2026-05-25 A2452A IAD → DEN May 25, 17:40 UTCMay 25, 21:19 UTC3h 39m - -
2026-05-24 A2452C IAD → DEN May 24, 17:50 UTCMay 24, 21:35 UTC3h 45m - -
2026-05-23 A0B821 IAD → DEN May 23, 17:35 UTCMay 23, 21:15 UTC3h 40m - -
2026-05-22 A0B88A IAD → DEN May 22, 17:40 UTCMay 22, 21:25 UTC3h 45m - -
2026-05-21 A24573 IAD → DEN May 21, 17:40 UTCMay 21, 21:30 UTC3h 50m - -
2026-05-20 A8D5A4 IAD → DEN May 20, 17:02 UTCMay 20, 17:40 UTC38m +22m +13m
2026-05-20 A8D5A4 IAD → DEN May 20, 16:50 UTCMay 20, 17:40 UTC50m - -
2026-05-19 AAA244 IAD → DEN May 19, 16:50 UTCMay 19, 17:35 UTC45m - -
2026-05-18 A5D28E IAD → DEN May 18, 17:00 UTCMay 18, 17:35 UTC35m - -
2026-05-17 A44544 IAD → DEN May 17, 17:02 UTCMay 17, 17:32 UTC30m +22m +5m
2026-05-17 A44544 IAD → DEN May 17, 16:45 UTCMay 17, 17:01 UTC15m - -
2026-05-16 A81006 IAD → DEN May 16, 16:50 UTCMay 16, 17:35 UTC45m - -
2026-05-15 A4945F IAD → DEN May 15, 17:05 UTCMay 15, 17:50 UTC45m - -
2026-05-14 A5D28E IAD → DEN May 14, 17:30 UTCMay 14, 18:05 UTC35m - -
2026-05-14 A5D28E IAD → DEN May 14, 17:02 UTCMay 14, 18:11 UTC1h 9m +22m +36m
2026-05-13 A494C5 IAD → DEN May 13, 17:20 UTCMay 13, 18:10 UTC50m - -
2026-05-12 AA2BA4 IAD → DEN May 12, 17:05 UTCMay 12, 17:40 UTC35m - -
2026-05-11 A494E9 IAD → DEN May 11, 17:15 UTCMay 11, 17:50 UTC35m - -
2026-05-10 A445EC IAD → DEN May 10, 16:50 UTCMay 10, 17:45 UTC55m - -
2026-05-09 A8D5A4 IAD → DEN May 9, 17:02 UTCMay 9, 17:29 UTC27m +22m +3m
2026-05-09 A8D5A4 IAD → DEN May 9, 16:45 UTCMay 9, 17:00 UTC15m - -
2026-05-08 A85F29 IAD → DEN May 8, 17:00 UTCMay 8, 17:40 UTC40m - -
2026-05-07 A8D5A0 IAD → DEN May 7, 16:45 UTCMay 7, 17:25 UTC40m - -
2026-05-06 A445F0 IAD → DEN May 6, 16:50 UTCMay 6, 17:35 UTC45m - -

Performance history

Flights tracked
60 showing last 30
Avg arrival delay
+10m
On-time arrival
80% 80% on time
Aircraft used
22

Monthly activity 2 months

Month Flights tracked
May 2026 37
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 1h 41m from takeoff to landing.
How often does UAL577 fly?
UAL577 has been observed flying daily in our tracking data. We've recorded 60 flights under this callsign.
Is flight UAL577 usually on time?
Across recent flights, UAL577 arrives with an average 10-minute delay. 80% 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.