| Date | From | To | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Jul 27 | BUF | IAD | 15:07 | 15:58 |
Landed
|
Track > |
| Jul 20 | BUF | IAD | 15:00 | 15:50 |
Landed
|
Track > |
| Jul 13 | BUF | IAD | 15:03 | 15:47 |
Landed
|
Track > |
| Jul 06 | BUF | IAD | 15:12 | 16:13 |
Landed
|
Track > |
| Jun 29 | BUF | IAD | 15:06 | 15:59 |
Landed
|
Track > |
United Airlines Flight UA4521 connects Buffalo, United States to Washington, United States, taking off from Buffalo Niagara International Airport BUF and landing at Washington Dulles International Airport IAD.
How long is the UA4521 flight from Buffalo to Washington?
The average flight time from Buffalo to Washington is 51 minutes. The flight distance is 457 km / 284 miles and the average flight speed is 535 km/h / 332 mph.
What is the On-Time Performance (OTP) of United Airlines Flight UA4521 Buffalo to Washington?
The Airportia On-Time Performance Rating for United Airlines Flight UA4521 is 5/5 stars. This metric is calculated using data from the past 10 flights.
When was the latest UA4521 flight?
The latest flight took off on Monday, July 27th, 2026 with the flight status being Landed on 15:58.
How else can the flight UA4521 be referenced as?
This United Airlines flight can also be referenced as UAL4521, UA 4521, UAL 4521.
How often is flight UA4521 delayed?
On average, 0% of all UA4521 flights are delayed. The average delay is 0 minutes.
Can I get compensation for my delayed or cancelled UA4521 flight or baggage issues?
If your UA4521 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 UA4521 Flight Tracker above for more details.
Flight UA4521 is code-shared by 2 airlines using the flight numbers LH7751, SN8961
Other flights departing from Buffalo BUF: AA6041, WN4734, DL3642, DL5296
Other flights arriving at Washington IAD: UA4387, UA4845, UA4362, UA4230
All flights connecting Buffalo BUF to Washington IAD.