UAL2309

For travellers

Departure · Denver (DEN)

Gate B25

Scheduled 07:43 · Departed 07:33 · early

Board status: Off block

Airborne since 07:49 (ADS-B)

Arrival · San Francisco (SFO)

Terminal T2 · Gate D15 · Baggage belt 1

Scheduled 13:05 · Landed 08:48 · early

Board status: On time

In the air (100% of the route flown)

Board data from den, sfo, updated 6 min ago; times local to each airport.

Flight

Status

In progress

Departure

Denver International Airport (DEN) — Denver, United States

Scheduled departure

2026-10-03 13:43 UTC

Departed

2026-10-03 13:49 UTC

Arrival

San Diego International Airport (SAN) — San Diego, United States (scheduled)

Scheduled arrival

2026-10-03 16:05 UTC

Estimated arrival

2026-10-03 15:44 UTC

Progress

100%

Also flies as

UA2309

Codeshares

AC4450, AZ4481, LH9223, VA8434

Distance flown

1404 km

Straight-line distance

1371 km

Aircraft

Registration

N37531

Type

Boeing 737 MAX 9

Seats

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

Altitude & speed

Max altitude

34,000 ft

Max ground speed

469 kt

Tracked

1h 59m · 1,404 km

Note

still in progress - the track so far

Altitude (ft, max 34,000)

Ground speed (kt, max 469)

Altitude (ft, max 34,000)

Ground speed (kt, max 469)

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 13:49 UTC	UAL2309	DEN → SAN Denver → San Diego	N37531	Boeing 737 MAX 9	In progress	~1371 km est.
2026-10-02 19:04 UTC	UAL2309	SAN → SFO San Diego → San Francisco	N17408	Boeing 737 MAX 9	Completed (landing confirmed by airport data)	781 km
2026-10-02 13:56 UTC	UAL2309	DEN → SAN Denver → San Diego	N37540	Boeing 737 MAX 9	Completed	1402 km
2026-10-01 18:57 UTC	UAL2309	SAN → SFO San Diego → San Francisco	N73278	Boeing 737-800	Completed	743 km
2026-10-01 14:15 UTC	UAL2309	DEN → SAN Denver → San Diego	N37534	Boeing 737 MAX 9	Completed	1410 km
2026-09-30 18:28 UTC	UAL2309	SAN → SFO San Diego → San Francisco	N77535	Boeing 737-800	Completed	747 km
2026-09-30 14:05 UTC	UAL2309	DEN → SAN Denver → San Diego	N47505	Boeing 737 MAX 9	Completed	1477 km
2026-09-29 18:23 UTC	UAL2309	SAN → SFO San Diego → San Francisco	N17327	Boeing 737 MAX 8	Completed	743 km
2026-09-29 13:51 UTC	UAL2309	DEN → SAN Denver → San Diego	N27539	Boeing 737 MAX 9	Completed	1398 km
2026-09-28 18:24 UTC	UAL2309	SAN → SFO San Diego → San Francisco	N27246	Boeing 737-800	Completed	745 km
2026-09-28 14:26 UTC	UAL2309	DEN → SAN Denver → San Diego	N37534	Boeing 737 MAX 9	Completed	1401 km
2026-09-27 18:31 UTC	UAL2309	SAN → SFO San Diego → San Francisco	N17245	Boeing 737-800	Completed	824 km
2026-09-27 13:36 UTC	UAL2309	DEN → SAN Denver → San Diego	N17229	Boeing 737-800	Completed	1407 km
2026-09-26 18:21 UTC	UAL2309	SAN → SFO San Diego → San Francisco	N26215	Boeing 737-800	Completed	746 km
2026-09-26 13:54 UTC	UAL2309	DEN → SAN Denver → San Diego	N37551	Boeing 737 MAX 9	Completed	1414 km
2026-09-25 18:29 UTC	UAL2309	SAN → SFO San Diego → San Francisco	N17430	Boeing 737 MAX 9	Completed	746 km
2026-09-25 13:50 UTC	UAL2309	DEN → SAN Denver → San Diego	N45440	Boeing 737-900	Completed	1404 km
2026-09-24 18:27 UTC	UAL2309	SAN → SFO San Diego → San Francisco	N47462	Boeing 737 MAX 9	Completed	765 km
2026-09-24 14:03 UTC	UAL2309	DEN → SAN Denver → San Diego	N27503	Boeing 737 MAX 9	Completed	1418 km
2026-09-23 18:45 UTC	UAL2309	SAN → SFO San Diego → San Francisco	N17233	Boeing 737-800	Completed	757 km
2026-09-23 13:51 UTC	UAL2309	DEN → SAN Denver → San Diego	N47569	Boeing 737 MAX 9	Completed	1406 km
2026-09-22 19:05 UTC	UAL2309	SAN → SFO San Diego → San Francisco	N73275	Boeing 737-800	Completed	778 km
2026-09-22 13:49 UTC	UAL2309	DEN → SAN Denver → San Diego	N17454	Boeing 737 MAX 9	Completed	1409 km
2026-09-21 18:11 UTC	UAL2309	SAN → SFO San Diego → San Francisco	N76254	Boeing 737-800	Completed	744 km
2026-09-21 14:06 UTC	UAL2309	DEN → SAN Denver → San Diego	N27515	Boeing 737 MAX 9	Completed	1438 km
2026-09-20 19:57 UTC	UAL2309	SAN → SFO San Diego → San Francisco	N76265	Boeing 737-800	Completed	843 km
2026-09-20 14:01 UTC	UAL2309	DEN → SAN Denver → San Diego	N27439	Boeing 737 MAX 9	Completed	1482 km
2026-09-19 18:21 UTC	UAL2309	SAN → SFO San Diego → San Francisco	N34222	Boeing 737-800	Completed	799 km
2026-09-19 14:03 UTC	UAL2309	DEN → SAN Denver → San Diego	N27586	Boeing 737 MAX 9	Completed	1475 km
2026-09-18 18:30 UTC	UAL2309	SAN → SFO San Diego → San Francisco	N76265	Boeing 737-800	Completed	865 km
2026-09-18 13:51 UTC	UAL2309	DEN → SAN Denver → San Diego	N37415	Boeing 737 MAX 9	Completed	1463 km
2026-09-17 18:39 UTC	UAL2309	SAN → SFO San Diego → San Francisco	N13227	Boeing 737-800	Completed	878 km
2026-09-17 13:54 UTC	UAL2309	DEN → SAN Denver → San Diego	N17477	Boeing 737 MAX 9	Completed	1499 km
2026-09-16 18:33 UTC	UAL2309	SAN → SFO San Diego → San Francisco	N34282	Boeing 737-800	Completed	825 km
2026-09-16 13:52 UTC	UAL2309	DEN → SAN Denver → San Diego	N17433	Boeing 737 MAX 9	Completed	1489 km
2026-09-15 18:18 UTC	UAL2309	SAN → SFO San Diego → San Francisco	N26215	Boeing 737-800	Completed	782 km
2026-09-15 13:53 UTC	UAL2309	DEN → SAN Denver → San Diego	N17574	Boeing 737 MAX 9	Completed	1483 km
2026-09-14 18:16 UTC	UAL2309	SAN → SFO San Diego → San Francisco	N87531	Boeing 737-800	Completed	855 km
2026-09-14 14:17 UTC	UAL2309	DEN → SAN Denver → San Diego	N38459	Boeing 737-900	Completed	1459 km
2026-09-13 18:14 UTC	UAL2309	SAN → SFO San Diego → San Francisco	N78524	Boeing 737-800	Completed	815 km
2026-09-13 13:59 UTC	UAL2309	DEN → SAN Denver → San Diego	N17456	Boeing 737 MAX 9	Completed	1503 km
2026-09-12 18:14 UTC	UAL2309	SAN → SFO San Diego → San Francisco	N87531	Boeing 737-800	Completed	802 km
2026-09-12 14:03 UTC	UAL2309	DEN → SAN Denver → San Diego	N37506	Boeing 737 MAX 9	Completed	1506 km
2026-09-11 18:20 UTC	UAL2309	SAN → SFO San Diego → San Francisco	N33284	Boeing 737-800	Completed	796 km
2026-09-11 14:01 UTC	UAL2309	DEN → SAN Denver → San Diego	N27509	Boeing 737 MAX 9	Completed	1491 km
2026-09-10 18:09 UTC	UAL2309	SAN → SFO San Diego → San Francisco	N12216	Boeing 737-800	Completed	866 km
2026-09-10 13:58 UTC	UAL2309	DEN → SAN Denver → San Diego	N37506	Boeing 737 MAX 9	Completed	1501 km
2026-09-09 18:10 UTC	UAL2309	SAN → SFO San Diego → San Francisco	N37298	Boeing 737-800	Completed	800 km
2026-09-09 14:58 UTC	UAL2309	DEN → SAN Denver → San Diego	N37514	Boeing 737 MAX 9	Completed	1501 km
2026-09-07 18:16 UTC	UAL2309	SAN → SFO San Diego → San Francisco	N76254	Boeing 737-800	Completed	801 km