| Date | From | To | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Jul 31 | DEN | GTF | 21:10 | 22:39 |
Delayed
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Track > |
| Jul 30 | DEN | GTF | 19:58 | 21:29 |
Landed Late
|
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| Jul 29 | DEN | GTF | 22:26 | 21:13 |
Unknown
|
Track > |
| Jul 28 | DEN | GTF | 20:41 | 22:11 |
Delayed
|
Track > |
| Jul 27 | DEN | GTF | 19:31 | 20:58 |
Landed
|
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| Jul 26 | DEN | GTF | 19:26 | 20:53 |
Landed
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| Jul 25 | DEN | GTF | 20:20 | 21:44 |
Landed Late
|
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| Jul 24 | DEN | GTF | 20:50 | 22:18 |
Delayed
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| Jul 23 | DEN | GTF | 21:03 | 22:28 |
Delayed
|
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| Jul 22 | DEN | GTF | 21:16 | 22:37 |
Landed Late
|
Track > |
United Airlines Flight UA2121 connects Denver, United States to Great Falls, United States, taking off from Denver International Airport DEN and landing at Great Falls International Airport GTF.
How long is the UA2121 flight from Denver to Great Falls?
The average flight time from Denver to Great Falls is 1 hour and 26 minutes. The flight distance is 1003 km / 623 miles and the average flight speed is 677 km/h / 420 mph.
What is the On-Time Performance (OTP) of United Airlines Flight UA2121 Denver to Great Falls?
The Airportia On-Time Performance Rating for United Airlines Flight UA2121 is 4.3/5 stars. This metric is calculated using data from the past 10 flights.
When was the latest UA2121 flight?
The latest flight took off on Friday, August 1st, 2025 with the flight status being En-Route on 22:39.
How else can the flight UA2121 be referenced as?
This United Airlines flight can also be referenced as UAL2121, UA 2121, UAL 2121.
How often is flight UA2121 delayed?
On average, 70% of all UA2121 flights are delayed. The average delay is 59 minutes.
Can I get compensation for my delayed or cancelled UA2121 flight or baggage issues?
If your UA2121 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 UA2121 Flight Tracker above for more details.
Other flights departing from Denver DEN: UA531, UA601, UA1294, UA1772
Other flights arriving at Great Falls GTF: G4671, DL3847, DL3847
All flights connecting Denver DEN to Great Falls GTF.
