| Date | From | To | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| May 18 | IAD | BUF | 08:34 | 09:24 |
Landed
|
Track > |
| May 17 | IAD | BUF | 08:36 | 09:26 |
Landed
|
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| May 15 | IAD | BUF | 08:32 | 09:31 |
Landed
|
Track > |
| May 14 | IAD | BUF | 08:44 | 09:36 |
Landed
|
Track > |
| May 11 | IAD | BUF | 10:23 | 11:13 |
Delayed
|
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| May 10 | IAD | BUF | 08:29 | 09:20 |
Landed
|
Track > |
| May 07 | IAD | BUF | 08:42 | 09:48 |
Unknown
|
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| May 04 | IAD | BUF | 08:18 | 09:28 |
Unknown
|
Track > |
| Apr 30 | IAD | BUF | 08:25 | 09:53 |
En-Route
|
Track > |
United Airlines Flight UA4012 connects Washington, United States to Buffalo, United States, taking off from Washington Dulles International Airport IAD and landing at Buffalo Niagara International Airport BUF.
How long is the UA4012 flight from Washington to Buffalo?
The average flight time from Washington to Buffalo is 56 minutes. The flight distance is 457 km / 284 miles and the average flight speed is 477 km/h / 296 mph.
What is the On-Time Performance (OTP) of United Airlines Flight UA4012 Washington to Buffalo?
The Airportia On-Time Performance Rating for United Airlines Flight UA4012 is 4.9/5 stars. This metric is calculated using data from the past 10 flights.
When was the latest UA4012 flight?
The latest flight took off on Monday, May 18th, 2026 with the flight status being Landed on 09:24.
How else can the flight UA4012 be referenced as?
This United Airlines flight can also be referenced as UAL4012, UA 4012, UAL 4012.
How often is flight UA4012 delayed?
On average, 11% of all UA4012 flights are delayed. The average delay is 80 minutes.
Can I get compensation for my delayed or cancelled UA4012 flight or baggage issues?
If your UA4012 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 UA4012 Flight Tracker above for more details.
Flight UA4012 is code-shared by 1 airline using the flight number CM1239
Other flights departing from Washington IAD: UA644, UA726, UA2739, UA637
Other flights arriving at Buffalo BUF: UA1079, B62115, WN1093, AA5962
All flights connecting Washington IAD to Buffalo BUF.