| Date | From | To | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| May 20 | IAD | DEN | 08:41 | 10:17 |
Landed
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Track > |
| May 19 | IAD | DEN | 08:40 | 10:02 |
Landed
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| May 18 | IAD | DEN | 08:57 | 10:26 |
Landed
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| May 17 | IAD | DEN | 09:24 | 10:15 |
Landed
|
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| May 16 | IAD | DEN | 08:37 | 10:01 |
Landed
|
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| May 15 | IAD | DEN | 09:25 | 10:34 |
Landed
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| May 14 | IAD | DEN | 08:40 | 10:01 |
Landed
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| May 13 | IAD | DEN | 08:40 | 10:14 |
Landed
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| May 12 | IAD | DEN | 08:51 | 10:14 |
Landed
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Track > |
| May 11 | IAD | DEN | 08:54 | 10:16 |
Landed
|
Track > |
United Airlines Flight UA644 connects Washington, United States to Denver, United States, taking off from Washington Dulles International Airport IAD and landing at Denver International Airport DEN.
How long is the UA644 flight from Washington to Denver?
The average flight time from Washington to Denver is 3 hours and 21 minutes. The flight distance is 2331 km / 1449 miles and the average flight speed is 698 km/h / 434 mph.
What is the On-Time Performance (OTP) of United Airlines Flight UA644 Washington to Denver?
The Airportia On-Time Performance Rating for United Airlines Flight UA644 is 5/5 stars. This metric is calculated using data from the past 10 flights.
When was the latest UA644 flight?
The latest flight took off on Wednesday, May 20th, 2026 with the flight status being Landed on 10:17.
How else can the flight UA644 be referenced as?
This United Airlines flight can also be referenced as UAL644, UA0644, UA 644, UAL 644.
How often is flight UA644 delayed?
On average, 10% of all UA644 flights are delayed. The average delay is 6 minutes.
Can I get compensation for my delayed or cancelled UA644 flight or baggage issues?
If your UA644 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 UA644 Flight Tracker above for more details.
Flight UA644 is code-shared by 1 airline using the flight number CM2857
Other flights departing from Washington IAD: UA4474, UA1366, UA3548, 9X125
Other flights arriving at Denver DEN: UA340, UA703, WN2011, UA5820
All flights connecting Washington IAD to Denver DEN.