UAL1921

Flight

Status

Completed

Departure

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

Est. departure time

2026-09-03 17:56 UTC (approx.)

Arrival

Chicago O'Hare International Airport (ORD) — Chicago, United States

Distance flown

3398 km

Straight-line distance

2964 km

Approach distance

105 km

Aircraft

Registration

N75858

Type

Boeing 737-300

Seats

213 total (24 Business, 189 Economy)

Altitude & speed

Max altitude

35,025 ft

Max ground speed

529 kt

Tracked

5h 22m · 3,212 km

Altitude (ft, max 35,025)

Ground speed (kt, max 529)

Altitude (ft, max 35,025)

Ground speed (kt, max 529)

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
2026-10-01 23:40 UTC	UAL1921	ORD → IAH Chicago → Houston	N14503	Airbus A321 Neo	Completed (landing confirmed by airport data)	1551 km
2026-10-01 00:04 UTC	UAL1921	ORD → IAH Chicago → Houston	N14531	Airbus A321 Neo	Completed (landing confirmed by airport data)	1577 km
2026-09-29 23:30 UTC	UAL1921	ORD → IAH Chicago → Houston	N17401	Boeing 737 MAX 9	Incomplete (signal lost)	1580 km
2026-09-29 00:23 UTC	UAL1921	ORD → IAH Chicago → Houston	N14549	Airbus A321 Neo	Completed	1616 km
2026-09-28 00:23 UTC	UAL1921	ORD → IAH Chicago → Houston	N34562	Airbus A321 Neo	Incomplete (signal lost)	1595 km
2026-09-26 23:02 UTC	UAL1921	ORD → IAH Chicago → Houston	N14559	Airbus A321 Neo	Completed	1596 km
2026-09-25 22:57 UTC	UAL1921	ORD → IAH Chicago → Houston	N37561	Boeing 737 MAX 9	Completed (landing presumed)	1603 km
2026-09-24 23:04 UTC	UAL1921	ORD → IAH Chicago → Houston	N14524	Airbus A321 Neo	Completed	1620 km
2026-09-23 23:04 UTC	UAL1921	ORD → IAH Chicago → Houston	N54561	Airbus A321 Neo	Completed	1593 km
2026-09-22 22:56 UTC	UAL1921	ORD → IAH Chicago → Houston	N14545	Airbus A321 Neo	Completed	1604 km
2026-09-21 23:42 UTC	UAL1921	ORD → IAH Chicago → Houston	N94556	Airbus A321 Neo	Completed	1569 km
2026-09-20 23:17 UTC	UAL1921	ORD → IAH Chicago → Houston	N14564	Airbus A321 Neo	Completed	1596 km
2026-09-20 00:32 UTC	UAL1921	ORD → IAH Chicago → Houston	N24555	Airbus A321 Neo	Completed	1640 km
2026-09-18 21:37 UTC	UAL1921	ORD → IAH Chicago → Houston	N24513	Airbus A321 Neo	Completed	1673 km
2026-09-18 00:20 UTC	UAL1921	ORD → IAH Chicago → Houston	N24537	Airbus A321 Neo	Completed	1653 km
2026-09-16 23:28 UTC	UAL1921	ORD → IAH Chicago → Houston	N14529	Airbus A321 Neo	Completed	1865 km
2026-09-15 23:21 UTC	UAL1921	ORD → IAH Chicago → Houston	N14503	Airbus A321 Neo	Completed	1667 km
2026-09-14 22:48 UTC	UAL1921	ORD → IAH Chicago → Houston	N14530	Airbus A321 Neo	Completed	1642 km
2026-09-13 22:52 UTC	UAL1921	ORD → IAH Chicago → Houston	N34547	Airbus A321 Neo	Incomplete (signal lost)	1900 km
2026-09-12 23:10 UTC	UAL1921	ORD → IAH Chicago → Houston	N14548	Airbus A321 Neo	Completed	1671 km
2026-09-11 23:08 UTC	UAL1921	ORD → IAH Chicago → Houston	N14506	Airbus A321 Neo	Incomplete (signal lost)	1742 km
2026-09-10 22:59 UTC	UAL1921	ORD → IAH Chicago → Houston	N14545	Airbus A321 Neo	Completed	1715 km
2026-09-09 23:03 UTC	UAL1921	ORD → IAH Chicago → Houston	N14512	Airbus A321 Neo	Completed (landing presumed)	1682 km
2026-09-07 23:25 UTC	UAL1921	ORD → IAH Chicago → Houston	N14534	Airbus A321 Neo	Completed	1853 km
2026-09-07 20:28 UTC	UAL1921	RNO → SFO Reno → San Francisco	N33284	Boeing 737-800	Completed	508 km
2026-09-07 01:10 UTC	UAL1921	ORD → IAH Chicago → Houston	N24555	Airbus A321 Neo	Completed	1589 km
2026-09-06 15:51 UTC	UAL1921	RNO → SFO Reno → San Francisco	N17331	Boeing 737 MAX 8	Completed	556 km
2026-09-05 21:35 UTC	UAL1921	SFO → ORD San Francisco → Chicago	N73860	Boeing 737-300	Completed	3184 km
2026-09-05 16:03 UTC	UAL1921	RNO → SFO Reno → San Francisco	N76528	Boeing 737-800	Completed	546 km
2026-09-04 23:39 UTC	UAL1921	ORD → IAH Chicago → Houston	N24537	Airbus A321 Neo	Completed (landing presumed)	1692 km
2026-09-04 15:38 UTC	UAL1921	RNO → SFO Reno → San Francisco	N34222	Boeing 737-800	Completed	464 km
2026-09-03 18:05 UTC	UAL1921	SFO → ORD San Francisco → Chicago	N75858	Boeing 737-300	Completed	3398 km
2026-09-03 15:29 UTC	UAL1921	RNO → SFO Reno → San Francisco	N87513	Boeing 737-800	Completed	507 km
2026-09-02 23:20 UTC	UAL1921	ORD → IAH Chicago → Houston	N14544	Airbus A321 Neo	Incomplete (signal lost)	1659 km
2026-09-02 15:34 UTC	UAL1921	RNO → SFO Reno → San Francisco	N77510	Boeing 737-800	Completed	493 km
2026-09-01 22:53 UTC	UAL1921	ORD → IAH Chicago → Houston	N34547	Airbus A321 Neo	Incomplete (signal lost)	1817 km
2026-09-01 15:27 UTC	UAL1921	RNO → SFO Reno → San Francisco	N76508	Boeing 737-800	Completed	656 km
2026-08-31 22:52 UTC	UAL1921	ORD → IAH Chicago → Houston	N14566	Airbus A321 Neo	Completed	1682 km
2026-08-31 15:46 UTC	UAL1921	RNO → SFO Reno → San Francisco	N76526	Boeing 737-800	Completed	568 km
2026-08-31 00:53 UTC	UAL1921	ORD → IAH Chicago → Houston	N24505	Airbus A321 Neo	Completed	1617 km
2026-08-30 17:28 UTC	UAL1921	SFO → ORD San Francisco → Chicago	N75854	Boeing 737-300	Completed	3539 km
2026-08-30 15:28 UTC	UAL1921	RNO → SFO Reno → San Francisco	N17344	Boeing 737 MAX 8	Completed	608 km
2026-08-29 22:50 UTC	UAL1921	ORD → IAH Chicago → Houston	N14541	Airbus A321 Neo	Completed	1600 km
2026-08-29 15:57 UTC	UAL1921	RNO → SFO Reno → San Francisco	N76254	Boeing 737-800	Completed	592 km
2026-08-28 23:03 UTC	UAL1921	ORD → IAH Chicago → Houston	N54538	Airbus A321 Neo	Completed (landing presumed)	1667 km
2026-08-28 16:37 UTC	UAL1921	RNO → SFO Reno → San Francisco	N33264	Boeing 737-800	Completed	479 km
2026-08-28 01:47 UTC	UAL1921	ORD → IAH Chicago → Houston	N34535	Airbus A321 Neo	Completed	1611 km
2026-08-27 17:33 UTC	UAL1921	SFO → SFO San Francisco → San Francisco	N77871	Boeing 737-300	Completed	~2 km est. (1 km recorded)
2026-08-27 15:34 UTC	UAL1921	RNO → SFO Reno → San Francisco	N76503	Boeing 737-800	Completed	576 km
2026-08-26 23:02 UTC	UAL1921	ORD → IAH Chicago → Houston	N34535	Airbus A321 Neo	Completed	1739 km