UAL3873

For travellers

Arrival · Chicago (ORD)

Gate INTL

Scheduled 17 Sep 18:17 · Estimated 18 Sep 09:46 · +929 min

Board status: Active

Landed 18 Sep 09:47 (ADS-B)

Board data from ord, updated 21973 min ago; times local to each airport.

Flight

Status

Completed

Arrival confirmed via

ADS-B (ground reading)

Departure

Rio Galeão – Tom Jobim International Airport (GIG) — Rio De Janeiro, Brazil

Departed

2026-09-18 04:18 UTC

Arrival

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

Scheduled arrival

2026-09-17 23:17 UTC

Estimated arrival

2026-09-18 14:46 UTC

Also flies as

UA3873

Distance flown

8928 km

Straight-line distance

8541 km

Approach distance

163 km

Aircraft

Registration

N28912

Type

Boeing 787-8

Seats

243 total (158 Economy, 36 Economy Plus, 21 Premium Plus, 28 Polaris)

CO2 (EMEP est., total)

354.8 t (3348 kg/pax Business, 1517 kg/pax Premium Economy, 1179 kg/pax Economy)

Altitude & speed

Max altitude

41,000 ft

Max ground speed

516 kt

Tracked

10h 29m · 8,800 km

Altitude (ft, max 41,000)

Ground speed (kt, max 516)

Altitude (ft, max 41,000)

Ground speed (kt, max 516)

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 06:27 UTC	UAL3873	ORD → IAB Chicago → Wichita	N18223	Boeing 737-800	Completed	978 km
2026-09-28 01:47 UTC	UAL3873	EWR → MLB Newark → Melbourne	N17410	Boeing 737 MAX 9	Completed	1687 km
2026-09-26 02:42 UTC	UAL3873	IAH → MCO Houston → Orlando	N73291	Boeing 737-800	Completed	1422 km
2026-09-23 02:30 UTC	UAL3873	IAD → ORD Washington, DC → Chicago	N655UA	Boeing B767 300ER	Completed	1045 km
2026-09-21 07:55 UTC	UAL3873	LCQ → ORD Lake City → Chicago	N498UA	Airbus A320 233	Completed	1549 km
2026-09-18 04:18 UTC	UAL3873	GIG → ORD Rio De Janeiro → Chicago	N28912	Boeing 787-8	Completed	8928 km
2026-09-12 16:13 UTC	UAL3873	EWR → PNS Newark → Pensacola	N670UA	Boeing B767 300ER	Completed	1999 km
2026-09-08 07:20 UTC	UAL3873	MLB → ORD Melbourne → Chicago	N37267	Boeing 737-800	Completed	1862 km
2026-09-06 04:42 UTC	UAL3873	EWR → ORD Newark → Chicago	N24729	Boeing 737-700	Completed	1319 km
2026-08-27 04:41 UTC	UAL3873	HND → SFO Ota, Tokyo → San Francisco	N77014	Boeing 777-200ER	Completed	8587 km
2026-08-19 00:07 UTC	UAL3873	DEN → MLB Denver → Melbourne	N822UA	Airbus A319	Completed	3789 km