| ARRIVED 15 HOUR 57 MINUTES AGO |
 |  |
Departure (UA421 Flight Schedule)
MDT 00:00:00 DAY
Arrival (UA421 Flight Schedule)
Louisville International Airport (SDF/KSDF)
Louisville, United States
21:59 EDT
Fri 20-Mar-2026
| ON TIME |
EDT 00:00:00 DAY
Flight Radar Checker UA 421
Live Flight Tracker Map
Flight UA421 from Denver to Louisville is operated by United Airlines. Scheduled time of departure from Denver Intl is 17:25 MDT and scheduled time of arrival in Louisville International Airport is 21:59 EDT. The duration of the flight is 2 hours 34 minutes.
Flight Finder
from Louisville to Denver
| Flight | Departure | Arrival |
|---|---|---|
| 5X990 02:00 |
Louisville International Airport (SDF) |
Denver Intl (DEN) |
| 5X802 03:56 |
Louisville International Airport (SDF) |
Denver Intl (DEN) |
| WN4984 07:15 |
Louisville International Airport (SDF) |
Denver Intl (DEN) |
| UA295 10:11 |
Louisville International Airport (SDF) |
Denver Intl (DEN) |
| UA1320 10:17 |
Louisville International Airport (SDF) |
Denver Intl (DEN) |
| WN2338 13:00 |
Louisville International Airport (SDF) |
Denver Intl (DEN) |
| WN1536 14:25 |
Louisville International Airport (SDF) |
Denver Intl (DEN) |
| WN1388 14:30 |
Louisville International Airport (SDF) |
Denver Intl (DEN) |
| WN1008 14:35 |
Louisville International Airport (SDF) |
Denver Intl (DEN) |
| 5X5804 16:20 |
Louisville International Airport (SDF) |
Denver Intl (DEN) |
| WN2837 16:30 |
Louisville International Airport (SDF) |
Denver Intl (DEN) |
| UA1510 16:31 |
Louisville International Airport (SDF) |
Denver Intl (DEN) |
| FRG212 23:42 |
Louisville International Airport (SDF) |
Centennial (APA) |
History Flight Information for UA421 from Flight Scanner System
| Date | Flight | Departure Airport | Arrival Airport | Scheduled | Plane | Estimated | ||
|---|---|---|---|---|---|---|---|---|
| Departure | Arrival | Departure | Arrival | |||||
| Sat, 21 Mar | UA421 | Denver Intl (DEN) | Louisville International Airport (SDF) | 17:25 MDT | 21:59 EDT | |||
| Fri, 20 Mar | UA421 | Denver Intl (DEN) | Louisville International Airport (SDF) | 17:25 MDT | 21:59 EDT | N818UA (Airbus A319) | 17:25 MDT | 21:47 EDT |
| Fri, 20 Mar | UA421 | John Wayne Arpt Orange Co (SNA) | Denver Intl (DEN) | 11:15 PDT | 14:34 MDT | 11:32 PDT | 14:57 MDT | |
| Wed, 18 Mar | UA421 | Denver Intl (DEN) | Louisville International Airport (SDF) | 17:25 MDT | 21:59 EDT | 17:22 MDT | 21:37 EDT | |
| Wed, 18 Mar | UA421 | John Wayne Arpt Orange Co (SNA) | Denver Intl (DEN) | 11:15 PDT | 14:34 MDT | 11:28 PDT | 14:22 MDT | |
| Tue, 17 Mar | UA421 | Denver Intl (DEN) | Louisville International Airport (SDF) | 17:25 MDT | 21:59 EDT | N890UA (Airbus A319) | 17:29 MDT | 21:42 EDT |
| Tue, 17 Mar | UA421 | John Wayne Arpt Orange Co (SNA) | Denver Intl (DEN) | 11:15 PDT | 14:34 MDT | |||
| Mon, 16 Mar | UA421 | Denver Intl (DEN) | Louisville International Airport (SDF) | 17:25 MDT | 21:59 EDT | N818UA (Airbus A319) | 17:17 MDT | 21:37 EDT |
| Sun, 15 Mar | UA421 | Denver Intl (DEN) | Louisville International Airport (SDF) | 17:25 MDT | 21:59 EDT | N844UA (Airbus A319) | 18:34 MDT | 00:28 EDT |
| Sun, 15 Mar | UA421 | John Wayne Arpt Orange Co (SNA) | Denver Intl (DEN) | 11:15 PDT | 14:34 MDT | 11:16 PDT | 14:22 MDT | |
| Sat, 14 Mar | UA421 | Denver Intl (DEN) | Louisville International Airport (SDF) | 17:25 MDT | 21:59 EDT | 17:26 MDT | 02:46 EDT | |
| Thu, 12 Mar | UA421 | Denver Intl (DEN) | Louisville International Airport (SDF) | 17:25 MDT | 21:59 EDT | N804UA (Airbus A319) | 20:06 MDT | 00:12 EDT |
| Wed, 11 Mar | UA421 | Denver Intl (DEN) | Louisville International Airport (SDF) | 17:25 MDT | 21:59 EDT | 18:16 MDT | 22:30 EDT | |
| Wed, 11 Mar | UA421 | John Wayne Arpt Orange Co (SNA) | Denver Intl (DEN) | 11:15 PDT | 14:34 MDT | 11:24 PDT | 14:14 MDT | |
| Tue, 10 Mar | UA421 | Denver Intl (DEN) | Louisville International Airport (SDF) | 17:25 MDT | 21:59 EDT | N891UA (Airbus A319) | 17:24 MDT | 21:35 EDT |
| Mon, 09 Mar | UA421 | Denver Intl (DEN) | Louisville International Airport (SDF) | 17:25 MDT | 21:59 EDT | N807UA (Airbus A319) | 17:20 MDT | 21:49 EDT |
| Mon, 09 Mar | UA421 | John Wayne Arpt Orange Co (SNA) | Denver Intl (DEN) | 11:15 PDT | 14:34 MDT | 11:23 PDT | 14:19 MDT | |
| Sun, 08 Mar | UA421 | Denver Intl (DEN) | Louisville International Airport (SDF) | 16:25 MDT | 20:59 EDT | N840UA (Airbus A319) | 19:52 MDT | 00:14 EDT |
| Sun, 08 Mar | UA421 | John Wayne Arpt Orange Co (SNA) | Denver Intl (DEN) | 10:15 PDT | 13:34 MDT | 11:25 PDT | 14:26 MDT | |
| Sat, 07 Mar | UA421 | Denver Intl (DEN) | Louisville International Airport (SDF) | 17:25 MST | 21:59 EST | N853UA (Airbus A319) | 18:35 MST | 22:49 EST |
| Fri, 06 Mar | UA421 | Denver Intl (DEN) | Louisville International Airport (SDF) | 17:25 MST | 21:59 EST | N826UA (Airbus A319) | 21:27 MST | 23:27 EST |
| Thu, 05 Mar | UA421 | Denver Intl (DEN) | Louisville International Airport (SDF) | 17:25 MST | 21:59 EST | N847UA (Airbus A319) | 18:24 MST | 22:41 EST |
| Thu, 05 Mar | UA421 | John Wayne Arpt Orange Co (SNA) | Denver Intl (DEN) | 11:15 PST | 14:34 MST | |||
| Wed, 04 Mar | UA421 | John Wayne Arpt Orange Co (SNA) | Denver Intl (DEN) | 11:10 PST | 14:29 MST | 12:30 PST | 15:20 MST | |
| Sun, 01 Mar | UA421 | John Wayne Arpt Orange Co (SNA) | Denver Intl (DEN) | 11:10 PST | 14:29 MST | 12:29 PST | 15:17 MST | |
| Thu, 26 Feb | UA421 | John Wayne Arpt Orange Co (SNA) | Denver Intl (DEN) | 11:10 PST | 14:29 MST | 12:24 PST | 15:17 MST | |
| Wed, 25 Feb | UA421 | John Wayne Arpt Orange Co (SNA) | Denver Intl (DEN) | 11:10 PST | 14:29 MST | 13:29 PST | 16:22 MST | |
| Mon, 23 Feb | UA421 | John Wayne Arpt Orange Co (SNA) | Denver Intl (DEN) | 11:10 PST | 14:29 MST | 12:19 PST | 15:10 MST | |
| Sun, 22 Feb | UA421 | John Wayne Arpt Orange Co (SNA) | Denver Intl (DEN) | 11:10 PST | 14:29 MST | 12:40 PST | 15:46 MST | |
| Sat, 21 Feb | UA421 | John Wayne Arpt Orange Co (SNA) | Denver Intl (DEN) | 11:10 PST | 14:29 MST | |||
| Fri, 20 Feb | UA421 | John Wayne Arpt Orange Co (SNA) | Denver Intl (DEN) | 11:10 PST | 14:29 MST | 12:17 PST | 14:59 MST | |
| Thu, 19 Feb | UA421 | John Wayne Arpt Orange Co (SNA) | Denver Intl (DEN) | 11:10 PST | 14:29 MST | 13:13 PST | 15:50 MST | |
| Tue, 17 Feb | UA421 | John Wayne Arpt Orange Co (SNA) | Denver Intl (DEN) | 11:10 PST | 14:29 MST | |||
| Mon, 16 Feb | UA421 | John Wayne Arpt Orange Co (SNA) | Denver Intl (DEN) | 11:10 PST | 14:29 MST | 12:34 PST | 15:13 MST | |
| Sun, 15 Feb | UA421 | John Wayne Arpt Orange Co (SNA) | Denver Intl (DEN) | 11:10 PST | 14:29 MST | 12:38 PST | 15:29 MST | |
| Thu, 12 Feb | UA421 | John Wayne Arpt Orange Co (SNA) | Denver Intl (DEN) | 11:10 PST | 14:29 MST | 12:19 PST | 15:02 MST | |
| Wed, 11 Feb | UA421 | John Wayne Arpt Orange Co (SNA) | Denver Intl (DEN) | 11:05 PST | 14:28 MST | 12:21 PST | 14:59 MST | |
| Sun, 08 Feb | UA421 | John Wayne Arpt Orange Co (SNA) | Denver Intl (DEN) | 11:05 PST | 14:28 MST | |||
| Sat, 07 Feb | UA421 | John Wayne Arpt Orange Co (SNA) | Denver Intl (DEN) | 11:05 PST | 14:28 MST | |||
| Thu, 05 Feb | UA421 | John Wayne Arpt Orange Co (SNA) | Denver Intl (DEN) | 11:05 PST | 14:28 MST | 12:04 PST | 15:08 MST | |
| Wed, 04 Feb | UA421 | John Wayne Arpt Orange Co (SNA) | Denver Intl (DEN) | 11:05 PST | 14:28 MST | 12:04 PST | 15:16 MST | |
| Tue, 03 Feb | UA421 | John Wayne Arpt Orange Co (SNA) | Denver Intl (DEN) | 11:05 PST | 14:28 MST | 12:05 PST | 15:06 MST | |
| Sun, 01 Feb | UA421 | John Wayne Arpt Orange Co (SNA) | Denver Intl (DEN) | 11:05 PST | 14:28 MST | 12:09 PST | 15:17 MST | |
Disclaimer for UA421 Flight Radar Data
Flight UA421 from Denver Intl to Louisville International Airport data is collected from different sources. The data is for informational purposes only and PlaneMapper is not responsible for the accuracy and reliability of flight UA421 data.
