United Airlines UA4578 Flight Status
According to Trip.com's real-time data, the UA4578 flight operated by United Airlines on Sep 21, 2026, scheduled to fly from Washington D.C. (IAD) to Greenville (GSP), has experienced a change in flight status: the originally scheduled departure time has been delayed, and the new departure time is 09:34 , with a new arrival time of 10:35 . Trip.com will continue to keep you updated on the latest flight status.
Fri, Sep 18
Mon, Sep 21
Tue, Sep 22
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Arrived
The flight has arrived 9m early
1h 33m
Check-in Counter
AREA 4
Boarding Gate
A6C
Arrival Gate
A9
Baggage
1
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Delayed
Your flight is about 1h 19m late.
1h 33m
Check-in Counter
AREA 4
Boarding Gate
A5D
Arrival Gate
A9
Baggage
1
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Scheduled
Your flight will depart on time.
1h 33m
Check-in Counter
AREA 4
Boarding Gate
A6C
Arrival Gate
A8
Baggage
1
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Information provided by VariFlight For the latest updates, please refer to airport announcements or consult your airline. You can also explore more flights from Washington D.C. to Greenville or track other flights with our flight status tracker.
Track the Previous Flight Status: Scheduled
UA4188
|
Dayton (DAY) 
Washington D.C. (WAS)
Washington D.C. (WAS)Scheduled: 21:23
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UA4578 Aircraft Details
According to Trip.com real-time data, the UA4578 flight flying from Washington D.C. to Greenville on 9/21/2026 is operated by the aircraft model Bombardier CRJ-550. This aircraft has been in service for 23y, 10m. The aircraft is equipped with 50 seats.
Bombardier CRJ-550
Punctuality (Departure)
88%
Punctuality (Arrival)
100%
Early on average
22 minutes
Age
23y, 10m
Seats
50
Distance
--
Economy
First
Premium Economy
Onboard Amenities
Snacks
Inflight entertainment is available
Unknown
USB port
Seating Plan
79 cm
Legroom
44 cm
Seat width
100°
Reclining Angle
2-2
Seat layout example
Onboard Amenities
Snacks
Inflight entertainment is available
Unknown
USB port and power outlet
Seating Plan
94 cm
Legroom
51 cm
Seat width
120°
Reclining Angle
1-2
Seat layout example
Onboard Amenities
Snacks
On-demand entertainment
Wi-Fi is available
USB port and power outlet
Seating Plan
86 cm
Legroom
44 cm
Seat width
100°
Reclining Angle
--
Seat layout example
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Flight History for UA4578
Trip.com historical records show that the last UA4578 flight departed on Fri, Sep 18 from IAD at approximately 08:45. This flight is expected to arrrive in GSP at 09:39.
| Date | Airport | Aircraft Type | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Departure | Arrival | |||||
| Tue, Sep 15 | Washington D.C. (IAD) | Greenville (GSP) | CRJ7 | 08:19 | 09:25 | Arrived |
| Wed, Sep 16 | Washington D.C. (IAD) | Greenville (GSP) | CRJ7 | 08:17 | 09:17 | Arrived |
| Thu, Sep 17 | Washington D.C. (IAD) | Greenville (GSP) | CRJ7 | 08:23 | 09:22 | Arrived |
| Fri, Sep 18 | Washington D.C. (IAD) | Greenville (GSP) | CRJ7 | 08:45 | 09:39 | Arrived |
| Mon, Sep 21 | Washington D.C. (IAD) | Greenville (GSP) | CRJ7 | 09:34 | 10:35 | Delayed |
| Tue, Sep 22 | Washington D.C. (IAD) | Greenville (GSP) | CRJ7 | 08:15 | 09:48 | Scheduled |
| Wed, Sep 23 | Washington D.C. (IAD) | Greenville (GSP) | CRJ7 | 08:15 | 09:48 | Scheduled |
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UA4578 On-Time Performance
Based on the average performance of this flight over the past 30 trips, the on-time departure rate of UA4578 is 88% (Late on average 11 minutes), and the on-time arrival rate is 100% (Early on average 22 minutes).
On-Time Departures
Punctuality
88%
Late on average 11 minutes
Early
0%
On time
88%
30 mins late
13%
60 mins late
0%
90 mins late
0%
Cancelled
11%
On-Time Arrivals
Punctuality
100%
Early on average 22 minutes
Early
100%
On time
0%
30 mins late
0%
60 mins late
0%
90 mins late
0%
Cancelled
11%
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Frequently Asked Questions
What is the current status of flight ua4578?
Flight ua4578 is delayed by about 79 minutes (status: Delayed). Latest estimated departure/arrival: 09:34 / 10:35 (updated Sep 21, 2026).Is flight ua4578 on time today?
Flight ua4578 is delayed by about 79 minutes (status: Delayed). The latest estimated departure/arrival times are 09:34 / 10:35. Watch for gate changes.Has flight ua4578 departed yet? What is the departure time?
Flight ua4578 is scheduled to depart at 08:15. The latest actual or estimated departure time is 09:34, and the current status is Delayed (updated Sep 21, 2026).When is flight ua4578 scheduled to arrive?
Flight ua4578 is scheduled to arrive at 09:48. The latest estimated or actual arrival time is 10:35. Status is Delayed as of Sep 21, 2026.What route does flight ua4578 fly?
Flight ua4578 is operated by United Airlines from Washington D.C. (IAD) to Greenville (GSP). Typical flight time is about 1 hour33 minutes; operating days may include Monday.How can I check real-time status for flight ua4578?
Track flight ua4578 on this Trip.com status page for live departure, arrival, gate and baggage updates. For push alerts on the go, open the same flight in the Trip.com App and turn on flight notifications.If flight ua4578 is delayed or canceled, what should I do?
If ua4578 is delayed or canceled, first confirm the latest status here (Delayed, updated Sep 21, 2026). Contact United Airlines or your booking channel for rebooking or refund options, and check Trip.com Manage Booking if you booked on Trip.com.Has flight ua4578 departed from Washington D.C.?
Flight ua4578 has not left Washington D.C. (IAD) yet and is delayed by about 79 minutes. Latest estimated departure: 09:34.What is the seat configuration for flight ua4578?
Flight ua4578 usually flies a Bombardier CRJ-550 with seat layout 2-2. Layouts can differ by aircraft subtype and cabin product—confirm your seat map in Manage Booking after you purchase.
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