| Date | From | To | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| May 16 | IAD | GSP | 13:33 | 14:40 |
Delayed
|
Track > |
| May 09 | IAD | GSP | 12:48 | 13:56 |
Landed
|
Track > |
United Airlines Flight UA4521 connects Washington, United States to Greenville-Spartanburg, United States, taking off from Washington Dulles International Airport IAD and landing at Greenville-Spartanburg International Airport GSP.
How long is the UA4521 flight from Washington to Greenville-Spartanburg?
The average flight time from Washington to Greenville-Spartanburg is 1 hour and 7 minutes. The flight distance is 618 km / 384 miles and the average flight speed is 549 km/h / 341 mph.
What is the On-Time Performance (OTP) of United Airlines Flight UA4521 Washington to Greenville-Spartanburg?
The Airportia On-Time Performance Rating for United Airlines Flight UA4521 is 4.8/5 stars. This metric is calculated using data from the past 10 flights.
When was the latest UA4521 flight?
The latest flight took off on Saturday, May 16th, 2026 with the flight status being En-Route on 14:40.
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, 50% of all UA4521 flights are delayed. The average delay is 25 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 AC4729, NH7132
Other flights departing from Washington IAD: UA3539, UA4843, UA3995, UA220
Other flights arriving at Greenville-Spartanburg GSP: CC7046, UA621, AA6099, UA5963
All flights connecting Washington IAD to Greenville-Spartanburg GSP.