UAL421

For travellers

Arrival · Chicago (ORD)

Terminal 1 · Gate C18A

Scheduled 18 Sep 23:40 · Estimated 18 Sep 23:17 · early

Board status: Scheduled

Landed 18 Sep 23:47 (ADS-B)

Board data from ord, updated 19698 min ago; times local to each airport.

Flight

Status

Completed

Arrival confirmed via

ADS-B (ground reading)

Departure

Washington Dulles International Airport (IAD) — Washington, DC, United States

Departed

2026-09-19 03:08 UTC

Arrival

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

Scheduled arrival

2026-09-19 04:40 UTC

Estimated arrival

2026-09-19 04:17 UTC

Also flies as

UA421

Codeshares

AC4420, CA7239, NZ2456

Distance flown

1084 km

Straight-line distance

945 km

Approach distance

134 km

Aircraft

Registration

N79541

Type

Boeing 737-800

Seats

166 total (102 Economy, 48 Economy Plus, 16 First)

CO2 (EMEP est., total)

25.2 t (208 kg/pax Business, 145 kg/pax Economy)

Altitude & speed

Max altitude

34,025 ft

Max ground speed

468 kt

Tracked

1h 39m · 1,054 km

Altitude (ft, max 34,025)

Ground speed (kt, max 468)

Altitude (ft, max 34,025)

Ground speed (kt, max 468)

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
2026-10-02 05:05 UTC	UAL421	IAD → ORD Washington, DC → Chicago	N34535	Airbus A321 Neo	Completed	1044 km
2026-10-01 22:58 UTC	UAL421	DEN → IAD Denver → Washington, DC	N34535	Airbus A321 Neo	Completed	2374 km
2026-10-01 17:49 UTC	UAL421	SJC → DEN San Jose → Denver	N69826	Boeing 737-900	Completed	1709 km
2026-10-01 02:36 UTC	UAL421	IAD → ORD Washington, DC → Chicago	N14566	Airbus A321 Neo	Completed	995 km
2026-09-30 21:42 UTC	UAL421	DEN → IAD Denver → Washington, DC	N14512	Airbus A321 Neo	Completed	2514 km
2026-09-30 02:52 UTC	UAL421	IAD → ORD Washington, DC → Chicago	N54570	Airbus A321 Neo	Completed	1016 km
2026-09-29 21:43 UTC	UAL421	DEN → IAD Denver → Washington, DC	N14559	Airbus A321 Neo	Completed	2410 km
2026-09-29 02:50 UTC	UAL421	IAD → ORD Washington, DC → Chicago	N54525	Airbus A321 Neo	Completed	1039 km
2026-09-28 22:12 UTC	UAL421	DEN → IAD Denver → Washington, DC	N14569	Airbus A321 Neo	Completed	2532 km
2026-09-28 02:58 UTC	UAL421	IAD → ORD Washington, DC → Chicago	N61882	Boeing 737-900	Completed	1056 km
2026-09-27 21:43 UTC	UAL421	DEN → IAD Denver → Washington, DC	N14528	Airbus A321 Neo	Completed	2430 km
2026-09-27 02:15 UTC	UAL421	IAD → ORD Washington, DC → Chicago	N78438	Boeing 737-900	Completed	1042 km
2026-09-26 21:45 UTC	UAL421	DEN → IAD Denver → Washington, DC	N17550	Boeing 737 MAX 9	Completed	2437 km
2026-09-26 00:39 UTC	UAL421	DEN → IAD Denver → Washington, DC	N14511	Airbus A321 Neo	Completed	2533 km
2026-09-25 02:24 UTC	UAL421	IAD → ORD Washington, DC → Chicago	N14559	Airbus A321 Neo	Completed	1032 km
2026-09-24 21:44 UTC	UAL421	DEN → IAD Denver → Washington, DC	N14564	Airbus A321 Neo	Completed	2513 km
2026-09-24 02:56 UTC	UAL421	IAD → ORD Washington, DC → Chicago	N36472	Boeing 737-900	Completed	1036 km
2026-09-23 21:37 UTC	UAL421	DEN → IAD Denver → Washington, DC	N14557	Airbus A321 Neo	Completed	2404 km
2026-09-23 02:56 UTC	UAL421	IAD → ORD Washington, DC → Chicago	N76532	Boeing 737-800	Completed	1035 km
2026-09-22 21:59 UTC	UAL421	DEN → IAD Denver → Washington, DC	N14531	Airbus A321 Neo	Completed	2419 km
2026-09-22 02:54 UTC	UAL421	IAD → ORD Washington, DC → Chicago	N77430	Boeing 737-900	Completed	1035 km
2026-09-21 21:41 UTC	UAL421	DEN → IAD Denver → Washington, DC	N14531	Airbus A321 Neo	Completed	2406 km
2026-09-21 03:27 UTC	UAL421	IAD → ORD Washington, DC → Chicago	N68452	Boeing 737-900	Completed	1040 km
2026-09-20 22:01 UTC	UAL421	DEN → IAD Denver → Washington, DC	N14548	Airbus A321 Neo	Completed	2404 km
2026-09-20 02:41 UTC	UAL421	IAD → ORD Washington, DC → Chicago	N38473	Boeing 737-900	Completed	1615 km
2026-09-19 21:36 UTC	UAL421	DEN → IAD Denver → Washington, DC	N34562	Airbus A321 Neo	Completed	2596 km
2026-09-19 03:08 UTC	UAL421	IAD → ORD Washington, DC → Chicago	N79541	Boeing 737-800	Completed	1084 km
2026-09-18 21:47 UTC	UAL421	DEN → IAD Denver → Washington, DC	N34547	Airbus A321 Neo	Completed	2631 km
2026-09-18 04:34 UTC	UAL421	IAD → ORD Washington, DC → Chicago	N87531	Boeing 737-800	Completed	1107 km
2026-09-17 21:34 UTC	UAL421	DEN → IAD Denver → Washington, DC	N14509	Airbus A321 Neo	Completed	2510 km
2026-09-17 02:21 UTC	UAL421	IAD → ORD Washington, DC → Chicago	N24211	Boeing 737-800	Completed	1105 km
2026-09-16 21:37 UTC	UAL421	DEN → IAD Denver → Washington, DC	N14576	Airbus A321 Neo	Completed	2535 km
2026-09-16 02:17 UTC	UAL421	IAD → ORD Washington, DC → Chicago	N35236	Boeing 737-800	Completed	1151 km
2026-09-15 21:36 UTC	UAL421	DEN → IAD Denver → Washington, DC	N54543	Airbus A321 Neo	Completed	2496 km
2026-09-15 02:24 UTC	UAL421	IAD → ORD Washington, DC → Chicago	N17460	Boeing 737 MAX 9	Completed	1075 km
2026-09-14 21:36 UTC	UAL421	DEN → IAD Denver → Washington, DC	N44501	Airbus A321 Neo	Completed	2518 km
2026-09-14 03:09 UTC	UAL421	IAD → ORD Washington, DC → Chicago	N39415	Boeing 737-900	Completed	1060 km
2026-09-13 21:35 UTC	UAL421	DEN → IAD Denver → Washington, DC	N64572	Airbus A321 Neo	Completed	2649 km
2026-09-13 02:53 UTC	UAL421	IAD → ORD Washington, DC → Chicago	N36476	Boeing 737-900	Completed	1047 km
2026-09-12 21:50 UTC	UAL421	DEN → IAD Denver → Washington, DC	N14515	Airbus A321 Neo	Completed	2597 km
2026-09-12 02:22 UTC	UAL421	IAD → ORD Washington, DC → Chicago	N75435	Boeing 737-900	Completed	1092 km
2026-09-11 21:47 UTC	UAL421	DEN → IAD Denver → Washington, DC	N14565	Airbus A321 Neo	Completed	2605 km
2026-09-11 02:29 UTC	UAL421	IAD → ORD Washington, DC → Chicago	N37468	Boeing 737-900	Completed	1093 km
2026-09-10 21:35 UTC	UAL421	DEN → IAD Denver → Washington, DC	N14576	Airbus A321 Neo	Completed	2591 km
2026-09-10 02:23 UTC	UAL421	IAD → ORD Washington, DC → Chicago	N37474	Boeing 737-900	Completed	1152 km
2026-09-09 21:49 UTC	UAL421	DEN → IAD Denver → Washington, DC	N14567	Airbus A321 Neo	Completed	2662 km
2026-09-08 02:21 UTC	UAL421	IAD → ORD Washington, DC → Chicago	N17373	Boeing 737 MAX 8	Completed	1080 km
2026-09-07 21:40 UTC	UAL421	DEN → IAD Denver → Washington, DC	N14521	Airbus A321 Neo	Completed	2529 km
2026-09-07 02:50 UTC	UAL421	IAD → ORD Washington, DC → Chicago	N47281	Boeing 737 MAX 8	Completed	1094 km
2026-09-06 21:31 UTC	UAL421	DEN → IAD Denver → Washington, DC	N14506	Airbus A321 Neo	Completed	2506 km