| Date | From | To | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Jan 05 | DEN | MKE | 19:13 | 21:58 |
Landed
|
Track > |
| Jan 04 | DEN | MKE | 19:05 | 21:51 |
Landed
|
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| Jan 03 | DEN | MKE | 19:21 | 22:07 |
Landed
|
Track > |
| Jan 02 | DEN | MKE | 18:57 | 21:55 |
Landed
|
Track > |
| Jan 01 | DEN | MKE | 19:02 | 21:54 |
Landed
|
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| Dec 31 | DEN | MKE | 19:09 | 21:59 |
Landed
|
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| Dec 30 | DEN | MKE | 18:56 | 21:55 |
Landed
|
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| Dec 29 | DEN | MKE | 20:03 | 23:14 |
Delayed
|
Track > |
| Dec 28 | DEN | MKE | 06:15 | 22:15 |
Unknown
|
Track > |
| Dec 27 | DEN | MKE | 20:02 | 22:45 |
Landed Late
|
Track > |
United Airlines Flight UA421 connects Denver, United States to Milwaukee, United States, taking off from Denver International Airport DEN and landing at Milwaukee General Mitchell International Airport MKE.
How long is the UA421 flight from Denver to Milwaukee?
The average flight time from Denver to Milwaukee is 1 hour and 52 minutes. The flight distance is 1438 km / 893 miles and the average flight speed is 755 km/h / 469 mph.
What is the On-Time Performance (OTP) of United Airlines Flight UA421 Denver to Milwaukee?
The Airportia On-Time Performance Rating for United Airlines Flight UA421 is 4.9/5 stars. This metric is calculated using data from the past 10 flights.
Which terminal is the flight UA421 arriving at?
Flight UA421 arrives at Milwaukee General Mitchell International Airport (MKE) Terminal A.
When was the latest UA421 flight?
The latest flight took off on Tuesday, January 6th, 2026 with the flight status being Landed on 21:58.
How else can the flight UA421 be referenced as?
This United Airlines flight can also be referenced as UAL421, UA0421, UA 421, UAL 421.
How often is flight UA421 delayed?
On average, 20% of all UA421 flights are delayed. The average delay is 44 minutes.
Can I get compensation for my delayed or cancelled UA421 flight or baggage issues?
If your UA421 flight was cancelled, delayed, or if you experienced baggage issues such as delayed, damaged, or lost bags, you may be entitled to compensation. Compensation amounts and eligibility depend on various regulations, including EC 261/2004, UK261, CA Montreal Convention, US GoodWill, BR-ANAC, SA-GACA and TK-SHY.
See our UA421 Flight Tracker above for more details.
Other flights departing from Denver DEN: WN1883, WN2298, UA281, WN888
Other flights arriving at Milwaukee MKE: UA6004, WN2538, UA6159, WN3616
All flights connecting Denver DEN to Milwaukee MKE.
