UAL323

Flight

Status

Completed

Arrival confirmed via

ADS-B (callsign change)

Departure

General Edward Lawrence Logan International Airport (BOS) — Boston, United States

Departed

2026-09-18 11:55 UTC

Arrival

San Francisco International Airport (SFO) — San Francisco, United States

Distance flown

4744 km

Straight-line distance

4341 km

Approach distance

76 km

Aircraft

Registration

N17550

Type

Boeing 737 MAX 9

Seats

179 total (117 Economy, 42 Economy Plus, 20 First)

Altitude & speed

Max altitude

34,025 ft

Max ground speed

466 kt

Tracked

6h 10m · 4,472 km

Altitude (ft, max 34,025)

Ground speed (kt, max 466)

Altitude (ft, max 34,025)

Ground speed (kt, max 466)

From the ADS-B positions we received; time since the first fix. A dashed stretch is a gap in reception, bridged by a straight line.

Route map

Airline

United Airlines (UAL)

Latest flights

Departed	Flight	Route	Reg	Aircraft	Status	Distance
2026-10-03 14:18 UTC	UAL323	SNA → DEN Santa Ana → Denver	N17314	Boeing 737 MAX 8	In progress	~1360 km est.
2026-10-02 17:21 UTC	UAL323	DEN → FCA Denver → Kalispell	N78285	Boeing 737-800	Incomplete (signal lost)	1274 km
2026-10-02 14:12 UTC	UAL323	SNA → DEN Santa Ana → Denver	N17358	Boeing 737 MAX 8	Completed	1483 km
2026-10-01 17:21 UTC	UAL323	DEN → FCA Denver → Kalispell	N76515	Boeing 737-800	Incomplete (signal lost)	1143 km
2026-10-01 14:15 UTC	UAL323	SNA → DEN Santa Ana → Denver	N17339	Boeing 737 MAX 8	Completed	1476 km
2026-09-30 17:19 UTC	UAL323	DEN → FCA Denver → Kalispell	N77544	Boeing 737 MAX 9	Incomplete (signal lost)	1225 km
2026-09-30 14:14 UTC	UAL323	SNA → DEN Santa Ana → Denver	N27290	Boeing 737 MAX 8	Completed	1455 km
2026-09-29 17:30 UTC	UAL323	DEN → FCA Denver → Kalispell	N77530	Boeing 737-800	Incomplete (signal lost)	1221 km
2026-09-29 14:15 UTC	UAL323	SNA → DEN Santa Ana → Denver	N27366	Boeing 737 MAX 8	Completed	1466 km
2026-09-28 17:25 UTC	UAL323	DEN → ? Denver → ?	N33286	Boeing 737-800	Incomplete (signal lost)	1126 km
2026-09-28 14:12 UTC	UAL323	SNA → DEN Santa Ana → Denver	N17349	Boeing 737 MAX 8	Completed	1515 km
2026-09-27 17:26 UTC	UAL323	DEN → ? Denver → ?	N37255	Boeing 737-800	Incomplete (signal lost)	1253 km
2026-09-26 17:09 UTC	UAL323	DEN → FCA Denver → Kalispell	N24211	Boeing 737-800	Completed (landing presumed)	1299 km
2026-09-26 14:14 UTC	UAL323	SNA → DEN Santa Ana → Denver	N17327	Boeing 737 MAX 8	Completed	1479 km
2026-09-25 17:14 UTC	UAL323	DEN → ? Denver → ?	N12225	Boeing 737-800	Incomplete (signal lost)	1225 km
2026-09-25 14:16 UTC	UAL323	SNA → DEN Santa Ana → Denver	N17317	Boeing 737 MAX 8	Completed	1473 km
2026-09-24 17:27 UTC	UAL323	DEN → ? Denver → ?	N12225	Boeing 737-800	Incomplete (signal lost)	1225 km
2026-09-24 14:13 UTC	UAL323	SNA → DEN Santa Ana → Denver	N27258	Boeing 737 MAX 8	Completed	1571 km
2026-09-23 11:51 UTC	UAL323	BOS → SFO Boston → San Francisco	N77558	Boeing 737 MAX 9	Completed	4477 km
2026-09-22 11:59 UTC	UAL323	BOS → SFO Boston → San Francisco	N37450	Boeing 737 MAX 9	Completed	4486 km
2026-09-21 11:53 UTC	UAL323	BOS → SFO Boston → San Francisco	N17422	Boeing 737 MAX 9	Completed	4594 km
2026-09-20 12:08 UTC	UAL323	BOS → SFO Boston → San Francisco	N27474	Boeing 737 MAX 9	Completed	4704 km
2026-09-19 11:57 UTC	UAL323	BOS → SFO Boston → San Francisco	N37450	Boeing 737 MAX 9	Completed	4765 km
2026-09-18 11:55 UTC	UAL323	BOS → SFO Boston → San Francisco	N17550	Boeing 737 MAX 9	Completed	4744 km
2026-09-17 12:07 UTC	UAL323	BOS → SFO Boston → San Francisco	N37472	Boeing 737 MAX 9	Completed	4767 km
2026-09-16 12:01 UTC	UAL323	BOS → SFO Boston → San Francisco	N17430	Boeing 737 MAX 9	Completed	4838 km
2026-09-15 11:55 UTC	UAL323	BOS → SFO Boston → San Francisco	N47412	Boeing 737 MAX 9	Completed	4876 km
2026-09-14 12:09 UTC	UAL323	BOS → SFO Boston → San Francisco	N17418	Boeing 737 MAX 9	Completed	5002 km
2026-09-13 12:03 UTC	UAL323	BOS → SFO Boston → San Francisco	N37577	Boeing 737 MAX 9	Completed	4821 km
2026-09-12 12:15 UTC	UAL323	BOS → SFO Boston → San Francisco	N17405	Boeing 737 MAX 9	Completed	4829 km
2026-09-11 12:03 UTC	UAL323	BOS → SFO Boston → San Francisco	N37549	Boeing 737 MAX 9	Completed	4955 km
2026-09-10 11:59 UTC	UAL323	BOS → SFO Boston → San Francisco	N17597	Boeing 737 MAX 9	Completed	4926 km
2026-09-09 11:54 UTC	UAL323	BOS → SFO Boston → San Francisco	N17468	Boeing 737 MAX 9	Completed	5013 km
2026-09-08 11:42 UTC	UAL323	BOS → ? Boston → ?	N47412	Boeing 737 MAX 9	Incomplete (signal lost)	1260 km
2026-09-07 14:30 UTC	UAL323	BUF → ORD Buffalo → Chicago	N37277	Boeing 737-800	Completed	939 km
2026-09-06 14:40 UTC	UAL323	BUF → ORD Buffalo → Chicago	N37474	Boeing 737-900	Completed	942 km
2026-09-05 14:27 UTC	UAL323	BUF → ORD Buffalo → Chicago	N77520	Boeing 737-800	Completed	951 km
2026-09-04 16:07 UTC	UAL323	BUF → ORD Buffalo → Chicago	N33284	Boeing 737-800	Completed	941 km
2026-09-03 14:54 UTC	UAL323	BUF → ORD Buffalo → Chicago	N14237	Boeing 737-800	Completed	912 km
2026-09-02 14:25 UTC	UAL323	BUF → ORD Buffalo → Chicago	N37287	Boeing 737-800	Completed	876 km
2026-09-01 14:42 UTC	UAL323	BUF → ORD Buffalo → Chicago	N54241	Boeing 737-800	Completed	884 km
2026-08-31 14:33 UTC	UAL323	BUF → ORD Buffalo → Chicago	N77520	Boeing 737-800	Completed	915 km
2026-08-30 14:42 UTC	UAL323	BUF → ORD Buffalo → Chicago	N77539	Boeing 737-800	Completed	840 km
2026-08-29 14:39 UTC	UAL323	BUF → ORD Buffalo → Chicago	N37257	Boeing 737 MAX 8	Completed	878 km
2026-08-28 14:36 UTC	UAL323	BUF → ORD Buffalo → Chicago	N17244	Boeing 737-800	Completed	919 km
2026-08-26 14:35 UTC	UAL323	BUF → ORD Buffalo → Chicago	N37277	Boeing 737-800	Completed	889 km
2026-08-25 14:35 UTC	UAL323	BUF → ORD Buffalo → Chicago	N73276	Boeing 737-800	Completed	891 km
2026-08-24 14:34 UTC	UAL323	BUF → ORD Buffalo → Chicago	N12225	Boeing 737-800	Completed	852 km
2026-08-23 14:55 UTC	UAL323	BUF → ORD Buffalo → Chicago	N14249	Boeing 737-800	Completed	1116 km
2026-08-22 14:29 UTC	UAL323	BUF → ORD Buffalo → Chicago	N14249	Boeing 737-800	Completed	1241 km