United Airlines UA543 Flight Status
According to Trip.com latest record on status for United Airlines flight UA543 from Buffalo to San Francisco (BUF-SFO): The scheduled departure has been delayed. New departure time is 07:40 with an updated arrival time of 13:27. Updates will follow.
Sat, Sep 19
Sun, Sep 20
Mon, Sep 21
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Arrived
The flight arrived 3h late.
9h 27m
ORD
4h 5m
Check-in Counter
--
Boarding Gate
10
Arrival Gate
E5
Baggage
E9
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Delayed
Your flight is about 45m late
9h 32m
ORD
2h 41m
Check-in Counter
--
Boarding Gate
10
Arrival Gate
F19
Baggage
9
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Scheduled
Your flight will depart on time.
9h 32m
ORD
2h 45m
Check-in Counter
--
Boarding Gate
--
Arrival Gate
--
Baggage
9
Flight status powered by VariFlight. For real-time updates, follow airport displays or contact your airline directly. You can also explore more flights from Buffalo to San Francisco or track other flights with our flight status tracker.
UA543 Aircraft Specifications
According to Trip.com real-time data, the UA543 flight from Buffalo to San Francisco on 9/20/2026 is operated using the aircraft model Boeing 737-800. This aircraft has been in service for 22y, 2m. The aircraft has 166 seats.
Boeing 737-800
On-Time Departure
77%
On-Time Arrival
70%
Avg. Delay
35 minutes
Aircraft Age
22y, 2m
Total Seats
166
Flight Distance
--
Economy
First
Premium Economy
Cabin Amenities
None
Live TV
Wi-Fi is available
No power outlets are available
Seat Information
76 cm
Legroom
--
Seat width
100°
Reclining Angle
3-3
Seat layout example
Cabin Amenities
Snacks
Live TV
Wi-Fi is available
Power outlet
Seat Information
94 cm
Legroom
53 cm
Seat width better than on 67% of flights
120°
Reclining Angle
2-2
Seat layout example
Cabin Amenities
Snacks
Live TV
Wi-Fi is available
Power outlet
Seat Information
86 cm
Legroom
--
Seat width
100°
Reclining Angle
3-3
Seat layout example
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UA543 Flight History
Trip.com historical records show that the last UA543 flight departed on Sat, Sep 19 from BUF at approximately 09:16. This flight is expected to arrrive in SFO at 16:27.
| Date | Airport | Aircraft Model | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Departure | Arrival | |||||
| Tue, Sep 15 | Buffalo (BUF) | San Francisco (SFO) | 738 | 08:16 | 13:56 | Arrived |
| Wed, Sep 16 | Buffalo (BUF) | San Francisco (SFO) | 739 | 07:32 | 13:29 | Arrived |
| Thu, Sep 17 | Buffalo (BUF) | San Francisco (SFO) | B39M | 08:43 | 15:28 | Arrived |
| Fri, Sep 18 | Buffalo (BUF) | San Francisco (SFO) | 738 | 06:55 | 14:25 | Arrived |
| Sat, Sep 19 | Buffalo (BUF) | San Francisco (SFO) | B39M | 09:16 | 16:27 | Arrived |
| Sun, Sep 20 | Buffalo (BUF) | San Francisco (SFO) | 738 | 07:40 | 13:27 | Delayed |
| Mon, Sep 21 | Buffalo (BUF) | San Francisco (SFO) | B39M | 06:55 | 13:27 | Scheduled |
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UA543 On-Time Performance
Based on the average performance of this flight over the last 30 trips, the on-time departure rate of UA543 is 77% (Late on average 27 minutes), and the on-time arrival rate is 70% (Late on average 35 minutes).
On-Time Departures
Punctuality
77%
Late on average 27 minutes
Early
3%
On time
73%
30 mins late
7%
60 mins late
7%
90 mins late
10%
Cancelled
0%
On-Time Arrivals
Punctuality
70%
Late on average 35 minutes
Early
47%
On time
23%
30 mins late
13%
60 mins late
3%
90 mins late
13%
Cancelled
0%
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Flight FAQs
What is the current status of flight ua543?
Flight ua543 is delayed by about 45 minutes (status: Delayed). Latest estimated departure/arrival: 07:40 / 13:27 (updated Sep 20, 2026).Is flight ua543 on time today?
Flight ua543 is delayed by about 45 minutes (status: Delayed). The latest estimated departure/arrival times are 07:40 / 13:27. Watch for gate changes.Has flight ua543 departed yet? What is the departure time?
Flight ua543 is scheduled to depart at 06:55. The latest actual or estimated departure time is 07:40, and the current status is Delayed (updated Sep 20, 2026).When is flight ua543 scheduled to arrive?
Flight ua543 is scheduled to arrive at 13:27. The latest estimated or actual arrival time is 13:27. Status is Delayed as of Sep 20, 2026.What is the baggage carousel number for flight ua543?
After arrival, baggage for flight ua543 is expected at carousel 9 in terminal T3. Carousel numbers are assigned close to landing and may change—follow airport signs on arrival.What route does flight ua543 fly?
Flight ua543 is operated by United Airlines from Buffalo (BUF) to San Francisco (SFO). Typical flight time is about 9 hours 32 minutes; operating days may include Sunday.How can I check real-time status for flight ua543?
Track flight ua543 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 ua543 is delayed or canceled, what should I do?
If ua543 is delayed or canceled, first confirm the latest status here (Delayed, updated Sep 20, 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 ua543 departed from Buffalo?
Flight ua543 has not left Buffalo (BUF) yet and is delayed by about 45 minutes. Latest estimated departure: 07:40.What is the seat configuration for flight ua543?
Flight ua543 usually flies a Boeing 737-800 with seat layout 3-3. Layouts can differ by aircraft subtype and cabin product—confirm your seat map in Manage Booking after you purchase.
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When You Land: San Francisco Weather & Time Zone
Mostly clear
|
16°C - 20°C
Weather forecast for your arrival day
-3 hour time difference
Time on arrival: Buffalo 16:27| San Francisco 13:27
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