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
23:23 EDT
Timezone
America/New_York
Type
Large Airport
Elevation
15 ft
Coordinates
38.8521, -77.0377

cloud Weather

Wind
0° / 0 kt
Visibility
10 SM
Ceiling
FEW 25,000 ft
Temp / Dew
18°C / 15°C
Altimeter
29.96 inHg

Obs: 2026-10-13T02:52:00.000Z

Raw METAR / TAF 
METAR KDCA 130252Z 00000KT 10SM FEW250 18/15 A2996 RMK AO2 SLP144 T01830150 53013

TAF KDCA 130258Z 1303/1406 22003KT P6SM FEW250 FM131400 18009KT P6SM SCT250 FM140300 22005KT P6SM SKC

flight Live Traffic

flight_takeoff 133 Departures
flight_land 115 Arrivals

Arrival

DEN KDEN VFR

Denver International Airport

Denver, US

Local time
21:23 MDT
Timezone
America/Denver
Type
Large Airport
Elevation
5,431 ft
Coordinates
39.8600, -104.6738

cloud Weather

Wind
210° / 21G30 kt
Visibility
10 SM
Ceiling
FEW 12,000 ft
Temp / Dew
21°C / 1°C
Altimeter
29.83 inHg

Obs: 2026-10-13T02:53:00.000Z

Raw METAR / TAF 
METAR KDEN 130253Z 21021G30KT 10SM FEW120 21/01 A2983 RMK AO2 PK WND 20037/0227 SLP024 T02110011 53009

TAF KDEN 130254Z 1303/1406 21021G30KT P6SM FEW120 FM130400 30010G22KT P6SM FEW100 FM130700 34010KT 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

flight Live Traffic

flight_takeoff 440 Departures
flight_land 387 Arrivals

Recent history last 30

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
2026-07-25 A12799 DCA → DEN Jul 25, 22:36 UTCJul 25, 23:35 UTC59m +28m +24m
2026-07-25 A12799 DCA → DEN Jul 25, 22:20 UTCJul 25, 23:35 UTC1h 15m - -
2026-07-24 A2B10F DCA → DEN Jul 24, 22:35 UTCJul 24, 23:55 UTC1h 20m - -
2026-07-24 A12753 DCA → DEN Jul 24, 01:00 UTCJul 24, 02:20 UTC1h 20m - -
2026-07-22 A1272D DCA → DEN Jul 22, 22:50 UTCJul 23, 00:20 UTC1h 30m - -
2026-07-22 A5CF41 DCA → DEN Jul 22, 03:55 UTCJul 22, 05:10 UTC1h 15m - -
2026-07-20 AA739E DCA → DEN Jul 20, 23:20 UTCJul 21, 00:35 UTC1h 14m - -
2026-07-20 A5CC13 DCA → DEN Jul 20, 00:40 UTCJul 20, 02:00 UTC1h 20m - -
2026-07-17 A1272D DCA → DEN Jul 17, 22:40 UTCJul 17, 23:55 UTC1h 15m - -
2026-07-16 A2B150 - Jul 16, 22:35 UTCJul 16, 23:55 UTC1h 20m - -
2026-07-16 A126EA - Jul 16, 01:25 UTCJul 16, 02:40 UTC1h 15m - -
2026-07-15 A44212 - Jul 15, 00:00 UTCJul 15, 01:15 UTC1h 15m - -
2026-07-13 A2B110 EWR → CLT Jul 13, 23:16 UTCJul 14, 00:41 UTC1h 25m +28m -12m
2026-07-13 A2B110 - Jul 13, 23:25 UTCJul 14, 00:40 UTC1h 15m - -
2026-07-13 A5CC11 - Jul 13, 00:10 UTCJul 13, 01:30 UTC1h 20m - -
2026-07-11 A441AC - Jul 11, 22:55 UTCJul 12, 00:15 UTC1h 20m - -
2026-07-11 A5CC12 - Jul 11, 00:50 UTCJul 11, 02:20 UTC1h 30m - -
2026-07-10 A2B110 - Jul 10, 01:20 UTCJul 10, 02:35 UTC1h 15m - -
2026-07-08 A12AC2 - Jul 8, 22:45 UTCJul 9, 00:05 UTC1h 20m - -
2026-07-07 A44187 - Jul 7, 23:40 UTCJul 8, 01:00 UTC1h 20m - -
2026-07-07 A44211 - Jul 7, 02:50 UTCJul 7, 04:15 UTC1h 25m - -
2026-07-05 A123E0 - Jul 5, 23:05 UTCJul 6, 00:15 UTC1h 10m - -
2026-07-05 A123E0 - Jul 5, 22:55 UTCJul 5, 23:00 UTC5m - -
2026-07-03 A12758 - Jul 3, 23:00 UTCJul 4, 00:15 UTC1h 15m - -
2026-07-02 A12734 - Jul 2, 22:40 UTCJul 2, 23:55 UTC1h 15m - -
2026-07-02 A2B154 - Jul 2, 01:10 UTCJul 2, 02:25 UTC1h 15m - -
2026-06-30 A4423A - Jun 30, 23:05 UTCJul 1, 00:25 UTC1h 20m - -
2026-06-29 A5CBF3 - Jun 29, 23:09 UTCJun 30, 00:30 UTC1h 20m - -
2026-06-28 A126C3 EWR → CLT Jun 28, 22:36 UTCJun 28, 23:49 UTC1h 13m +28m -6m
2026-06-28 A126C3 - Jun 28, 22:29 UTCJun 29, 00:00 UTC1h 30m - -

Performance history

Flights tracked
128 showing last 30
Avg arrival delay
+2m
On-time arrival
67% 67% on time
Aircraft used
24

Monthly activity 4 months

Month Flights tracked
July 2026 26
June 2026 40
May 2026 41
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 16m 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 128 flights under this callsign.
Is flight UAL2104 usually on time?
Across recent flights, UAL2104 arrives with an average 2-minute delay. 67% of flights arrive within 15 minutes of schedule.
What aircraft operates flight UAL2104?
UAL2104 has been operated by 24 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.