Apparatus

Try JFK, AAL1290, BAW, or N225AN.

flight_takeoff Flight

UAL2104

Operated by United Airlines

Live map

Live map filtered to UAL2104. Shown when the flight is currently airborne.

Route airports View route page →

Departure

DCA KDCA VFR

Ronald Reagan Washington National Airport

Washington, US

Local time
03:32 EDT
Timezone
America/New_York
Type
Large Airport
Elevation
15 ft
Coordinates
38.8521, -77.0377

cloud Weather

Wind
240° / 4 kt
Visibility
10 SM
Ceiling
SCT 25,000 ft
Temp / Dew
19°C / 11°C
Altimeter
29.80 inHg

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

Raw METAR / TAF 
METAR KDCA 300652Z 24004KT 10SM SCT250 19/11 A2980 RMK AO2 SLP089 T01940106

TAF KDCA 300538Z 3006/3112 27003KT P6SM FEW250 FM300900 33007G15KT P6SM FEW250 FM301200 36012G23KT P6SM SKC FM302200 36011G18KT P6SM SKC FM310000 01007KT P6SM SKC FM310800 00000KT P6SM SKC

flight Live Traffic

flight_takeoff 27 Departures
flight_land 22 Arrivals

Arrival

DEN KDEN VFR

Denver International Airport

Denver, US

Local time
01:32 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 163 Departures
flight_land 138 Arrivals

Recent history last 30

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
2026-05-29 A2B47F DCA → DEN May 29, 11:25 UTCMay 29, 13:25 UTC2h 0m - -
2026-05-29 A2B47F DCA → DEN May 29, 11:19 UTCMay 29, 13:25 UTC2h 6m +19m +5m
2026-05-28 A2B4EA DCA → DEN May 28, 11:15 UTCMay 28, 13:05 UTC1h 50m - -
2026-05-28 A2B4EA DCA → DEN May 28, 11:14 UTCMay 28, 13:11 UTC1h 57m +14m +5m
2026-05-27 A8E9FD DCA → DEN May 27, 11:10 UTCMay 27, 13:05 UTC1h 55m - -
2026-05-26 A441AC DCA → DEN May 26, 11:09 UTCMay 26, 13:00 UTC1h 50m - -
2026-05-25 A441F5 DCA → DEN May 25, 11:10 UTCMay 25, 13:00 UTC1h 50m - -
2026-05-24 A5CF8B DCA → DEN May 24, 11:50 UTCMay 24, 13:45 UTC1h 55m - -
2026-05-24 A5CF8B DCA → DEN May 24, 11:39 UTCMay 24, 13:39 UTC2h 0m +39m +8m
2026-05-23 A5CF82 DCA → DEN May 23, 11:30 UTCMay 23, 13:25 UTC1h 55m - -
2026-05-22 A2B12E DCA → DEN May 22, 11:20 UTCMay 22, 13:05 UTC1h 46m - -
2026-05-21 AB618B DCA → DEN May 21, 12:00 UTCMay 21, 15:25 UTC3h 25m - -
2026-05-20 A92361 DCA → DEN May 20, 13:18 UTCMay 20, 14:32 UTC1h 14m +33m -6m
2026-05-20 A92361 DCA → DEN May 20, 13:00 UTCMay 20, 14:40 UTC1h 40m - -
2026-05-19 A94B72 DCA → DEN May 19, 12:55 UTCMay 19, 14:35 UTC1h 40m - -
2026-05-18 A8D46A DCA → DEN May 18, 13:18 UTCMay 18, 14:32 UTC1h 14m +33m -12m
2026-05-18 A8D46A DCA → DEN May 18, 12:55 UTCMay 18, 13:00 UTC5m - -
2026-05-17 A494C5 DCA → DEN May 17, 12:55 UTCMay 17, 14:35 UTC1h 40m - -
2026-05-16 A2DFFE DCA → DEN May 16, 13:15 UTCMay 16, 14:55 UTC1h 40m - -
2026-05-15 A923EF DCA → DEN May 15, 13:18 UTCMay 15, 14:41 UTC1h 23m +33m -3m
2026-05-15 A923EF DCA → DEN May 15, 13:00 UTCMay 15, 14:45 UTC1h 45m - -
2026-05-14 A12F4C DCA → DEN May 14, 13:05 UTCMay 14, 14:50 UTC1h 45m - -
2026-05-13 A91535 DCA → DEN May 13, 12:55 UTCMay 13, 14:35 UTC1h 40m - -
2026-05-12 A94B51 DCA → DEN May 12, 13:00 UTCMay 12, 14:40 UTC1h 40m - -
2026-05-11 A92384 DCA → DEN May 11, 12:50 UTCMay 11, 14:30 UTC1h 40m - -
2026-05-10 A4943E DCA → DEN May 10, 13:05 UTCMay 10, 14:40 UTC1h 35m - -
2026-05-09 A8D4D2 DCA → DEN May 9, 13:18 UTCMay 9, 14:30 UTC1h 12m +33m on time
2026-05-09 A8D4D2 DCA → DEN May 9, 12:50 UTCMay 9, 13:00 UTC10m - -
2026-05-08 A94AE3 DCA → DEN May 8, 13:05 UTCMay 8, 14:45 UTC1h 40m - -
2026-05-07 A8D4F6 DCA → DEN May 7, 13:18 UTCMay 7, 14:31 UTC1h 13m +33m -6m

Performance history

Flights tracked
59 showing last 30
Avg arrival delay
-1m
On-time arrival
100% 100% on time
Aircraft used
23

Monthly activity 2 months

Month Flights tracked
May 2026 38
April 2026 21

UAL2104 frequently asked

Where does flight UAL2104 fly?
UAL2104 (United Airlines) flies from DCA to DEN. View the full route page.
How long is flight UAL2104?
Based on observed flights, UAL2104 takes on average 1h 39m from takeoff to landing.
How often does UAL2104 fly?
UAL2104 has been observed flying several times a week in our tracking data. We've recorded 59 flights under this callsign.
Is flight UAL2104 usually on time?
Across recent flights, UAL2104 arrives 1 minutes early on average. 100% of flights arrive within 15 minutes of schedule.
What aircraft operates flight UAL2104?
UAL2104 has been operated by 23 different aircraft in our records. Tail numbers are listed in the recent history below.
Can I track UAL2104 live?
Yes. When UAL2104 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.