Aircraft N23721 Data
1
aircraft record found
N23721
1999 Boeing 737-724, c/n 28940
Latest photos of N23721
Mark Pasqualino
@ KORD
Mark Pasqualino
@ KIAH
Dariusz Jezewski www.FotoDj.com
@ KEWR
FerryPNL
@ KSNA
Recent Routes
| Time | Callsign | FL | Speed | Heading | Route |
|---|---|---|---|---|---|
| 2026-10-10 18:50 UTC | UAL1533 / UA1533 | FL380 | 401 kt | 282° | — |
| 2026-10-09 18:14 UTC | UAL2190 / UA2190 | FL5 | 135 kt | 90° | — |
| 2026-10-09 13:56 UTC | UAL1077 / UA1077 | — | 10 kt | 177° |
ORD → DCA
ORD
→
DCA
Chicago O'hare International Airport → Ronald Reagan Washington Ntl Airport |
| 2026-10-09 10:42 UTC | UAL2112 / UA2112 | — | 17 kt | 188° | — |
| 2026-10-09 00:46 UTC | UAL2652 / UA2652 | FL7 | 135 kt | 230° |
KAZ3 → ORD
KAZ3 →
ORD
KAZ3 → Chicago O'hare International Airport |
| 2026-10-08 22:24 UTC | UAL2803 / UA2803 | — | 14 kt | 245° |
DCA → ORD
DCA
→
ORD
Ronald Reagan Washington Ntl Airport → Chicago O'hare International Airport |
| 2026-10-08 19:28 UTC | UAL1705 / UA1705 | — | 6 kt | 312° |
ORD → DCA
ORD
→
DCA
Chicago O'hare International Airport → Ronald Reagan Washington Ntl Airport |
| 2026-10-08 16:12 UTC | UAL1215 / UA1215 | — | 24 kt | 90° | — |
| 2026-10-07 21:52 UTC | UAL1634 / UA1634 | FL5 | 132 kt | 178° |
DFW → ORD
DFW
→
ORD
Dallas-fort Worth International Airport → Chicago O'hare International Airport |
| 2026-10-07 17:56 UTC | UAL3872 / UA3872 | — | 12 kt | 174° | — |
| 2026-09-27 02:16 UTC | UAL3879 / UA3879 | FL27 | 181 kt | 140° | — |
| 2026-09-26 21:46 UTC | UAL516 / UA516 | — | 15 kt | 90° |
ATL → ORD
ATL
→
ORD
Hartsfield/jackson Atlanta International Airport → Chicago O'hare International Airport |
| 2026-09-26 18:42 UTC | UAL471 / UA471 | — | 1 kt | 239° |
IAD → ATL
IAD
→
ATL
Washington Dulles International Airport → Hartsfield/jackson Atlanta International Airport |
| 2026-09-26 15:38 UTC | UAL413 / UA413 | — | 0 kt | 354° |
ABQ → IAD
ABQ
→
IAD
Albuquerque International Sunport Airport → Washington Dulles International Airport |
| 2026-09-26 01:56 UTC | UAL2070 / UA2070 | — | 1 kt | 180° |
IAD → ABQ
IAD
→
ABQ
Washington Dulles International Airport → Albuquerque International Sunport Airport |
| 2026-09-25 20:32 UTC | UAL1538 / UA1538 | — | 0 kt | 354° | — |
| 2026-09-25 18:02 UTC | UAL454 / UA454 | FL6 | 147 kt | 94° |
EWR → DFW
EWR
→
DFW
Newark Liberty International Airport → Dallas-fort Worth International Airport |
| 2026-09-24 15:38 UTC | UAL2098 / UA2098 | — | 8 kt | 270° |
BOS → IAD
BOS
→
IAD
General Edward Lawrence Logan International Airport → Washington Dulles International Airport |
| 2026-09-24 12:34 UTC | UAL593 / UA593 | — | 12 kt | 194° |
EWR → BOS
EWR
→
BOS
Newark Liberty International Airport → General Edward Lawrence Logan International Airport |
| 2026-09-24 09:30 UTC | UAL2186 / UA2186 | — | 0 kt | 186° | — |
| 2026-09-24 03:30 UTC | UAL1690 / UA1690 | FL3 | 132 kt | 209° | — |
| 2026-09-23 20:04 UTC | UAL2174 / UA2174 | — | 9 kt | 203° |
BNA → EWR
BNA
→
EWR
Nashville International Airport → Newark Liberty International Airport |
| 2026-09-23 16:50 UTC | UAL1581 / UA1581 | — | 12 kt | 25° |
EWR → BNA
EWR
→
BNA
Newark Liberty International Airport → Nashville International Airport |
| 2026-09-23 13:24 UTC | UAL2053 / UA2053 | — | 12 kt | 186° |
EWR → ORD
EWR
→
ORD
Newark Liberty International Airport → Chicago O'hare International Airport |
| 2026-09-23 02:34 UTC | UAL2770 / UA2770 | — | 4 kt | 329° |
ORD → ATL
ORD
→
ATL
Chicago O'hare International Airport → Hartsfield/jackson Atlanta International Airport |
| 2026-09-22 23:42 UTC | UAL2211 / UA2211 | — | 15 kt | 90° |
ORD → SEA
ORD
→
SEA
Chicago O'hare International Airport → Seattle-tacoma International Airport |
| 2026-09-22 17:58 UTC | UAL2137 / UA2137 | FL3 | 144 kt | 71° | — |
| 2026-09-22 14:40 UTC | UAL1955 / UA1955 | — | 20 kt | 90° |
ATL → ORD
ATL
→
ORD
Hartsfield/jackson Atlanta International Airport → Chicago O'hare International Airport |
| 2026-09-21 23:34 UTC | UAL563 / UA563 | — | 12 kt | 0° |
BOS → ORD
BOS
→
ORD
General Edward Lawrence Logan International Airport → Chicago O'hare International Airport |
| 2026-09-21 18:32 UTC | UAL1952 / UA1952 | FL7 | 150 kt | 327° | — |
| 2026-09-20 20:16 UTC | UAL8181 / UA8181 | — | 0 kt | 352° | — |
| 2026-09-19 21:48 UTC | UAL8130 / UA8130 | FL2 | 130 kt | 208° | — |
| 2026-09-19 16:04 UTC | UAL1683 / UA1683 | FL9 | 134 kt | 90° | — |
| 2026-09-19 03:42 UTC | UAL349 / UA349 | FL5 | 135 kt | 28° | — |
| 2026-09-19 01:00 UTC | UAL403 / UA403 | — | 10 kt | 110° | — |
| 2026-09-18 22:38 UTC | UAL664 / UA664 | FL30 | 208 kt | 225° |
LAS → ORD
LAS
→
ORD
Harry Reid International Airport → Chicago O'hare International Airport |
| 2026-09-18 19:08 UTC | UAL511 / UA511 | — | 14 kt | 14° |
DCA → ORD
DCA
→
ORD
Ronald Reagan Washington Ntl Airport → Chicago O'hare International Airport |
| 2026-09-18 16:00 UTC | UAL307 / UA307 | — | 3 kt | 253° |
MSP → ORD
MSP
→
ORD
Minneapolis-st Paul Intl/wold-chamberlain Airport → Chicago O'hare International Airport |
| 2026-09-18 01:16 UTC | UAL785 / UA785 | — | 4 kt | 8° |
MSY → DEN
MSY
→
DEN
Louis Armstrong New Orleans International Airport → Denver International Airport |
| 2026-09-17 22:04 UTC | UAL1848 / UA1848 | — | 1 kt | 180° |
EWR → ATL
EWR
→
ATL
Newark Liberty International Airport → Hartsfield/jackson Atlanta International Airport |
| 2026-09-17 18:38 UTC | UAL1992 / UA1992 | — | 1 kt | 186° | — |
| 2026-09-17 15:44 UTC | UAL544 / UA544 | FL6 | 143 kt | 230° | — |
| 2026-09-15 19:22 UTC | UAL2026 / UA2026 | FL3 | 141 kt | 89° | — |
| 2026-09-15 16:32 UTC | UAL2256 / UA2256 | — | 8 kt | 259° | — |
| 2026-09-15 13:04 UTC | UAL678 / UA678 | FL4 | 136 kt | 270° | — |
| 2026-09-15 02:24 UTC | UAL2339 / UA2339 | FL34 | 253 kt | 232° | — |
| 2026-09-14 23:06 UTC | UAL1853 / UA1853 | FL3 | 141 kt | 90° | — |
| 2026-09-14 20:52 UTC | UAL1852 / UA1852 | — | 1 kt | 31° | — |
| 2026-09-14 17:30 UTC | UAL1089 / UA1089 | FL5 | 143 kt | 270° | — |
| 2026-09-14 14:24 UTC | UAL1024 / UA1024 | — | 19 kt | 239° | — |
| 2026-09-14 02:42 UTC | UAL1678 / UA1678 | FL4 | 142 kt | 89° |
SFO → DCA
SFO
→
DCA
San Francisco International Airport → Ronald Reagan Washington Ntl Airport |
| 2026-09-13 22:28 UTC | KDCA | — | 6 kt | 354° | — |
| 2026-09-13 14:14 UTC | UAL482 / UA482 | — | 10 kt | 177° |
ORD → DCA
ORD
→
DCA
Chicago O'hare International Airport → Ronald Reagan Washington Ntl Airport |
| 2026-09-13 03:46 UTC | UAL2229 / UA2229 | — | 12 kt | 87° |
BOS → ORD
BOS
→
ORD
General Edward Lawrence Logan International Airport → Chicago O'hare International Airport |
| 2026-09-12 23:56 UTC | UAL2466 / UA2466 | — | 1 kt | 290° |
MCO → ORD
MCO
→
ORD
Orlando International Airport → Chicago O'hare International Airport |
| 2026-09-12 19:10 UTC | UAL1935 / UA1935 | — | 24 kt | 194° |
ORD → MSP
ORD
→
MSP
Chicago O'hare International Airport → Minneapolis-st Paul Intl/wold-chamberlain Airport |
| 2026-09-12 16:46 UTC | UAL485 / UA485 | FL50 | 297 kt | 42° |
ORD → YYZ
ORD
→
YYZ
Chicago O'hare International Airport → Lester B Pearson International Airport |
| 2026-09-12 14:08 UTC | UAL567 / UA567 | — | 8 kt | 180° |
DFW → DEN
DFW
→
DEN
Dallas-fort Worth International Airport → Denver International Airport |
| 2026-09-11 21:52 UTC | UAL739 / UA739 | FL8 | 145 kt | 90° |
ORD → BNA
ORD
→
BNA
Chicago O'hare International Airport → Nashville International Airport |
| 2026-09-11 19:02 UTC | UAL247 / UA247 | FL17 | 132 kt | 144° |
PHL → ORD
PHL
→
ORD
Philadelphia International Airport → Chicago O'hare International Airport |
| 2026-09-11 16:00 UTC | UAL1294 / UA1294 | — | 7 kt | 6° | — |
| 2026-09-11 01:02 UTC | UAL378 / UA378 | FL320 | 403 kt | 281° |
MCO → ORD
MCO
→
ORD
Orlando International Airport → Chicago O'hare International Airport |
| 2026-09-10 20:28 UTC | UAL1888 / UA1888 | — | 20 kt | 90° |
DCA → ORD
DCA
→
ORD
Ronald Reagan Washington Ntl Airport → Chicago O'hare International Airport |
Live location data from OpenSky Network
Airframe Info
| Manufacturer | Boeing |
| Model | 737-724 Search all Boeing 737-724 |
| Year built | 1999 |
| Construction Number (C/N) | 28940 |
| Aircraft Type | Fixed wing multi engine |
| Number of Seats | 149 |
| Number of Engines | 2 |
| Engine Type | Turbofan |
| Engine Manufacturer and Model | CFM International CFM56-7B2 |
Aircraft
| Registration Number | N23721 |
| Mode S (ICAO24) Code | a22539 |
| Certification Class | Standard |
| Certification Issued | 1999-03-10 |
| Air Worthiness Test | 1999-03-09 |
| Last Action Taken | 2023-09-09 |
| Current Status | Valid |
Owner
| Registration Type | Corporation |
| Owner | UNITED AIRLINES INC |
| Address |
233 S Wacker Dr Chicago, IL 606067147 United States |
| Region | Great Lakes |