N23721 — 1999 Boeing 737-724 Data
1
aircraft record found
N23721
1999 Boeing 737-724, c/n 28940
N23721 is a 1999 Boeing 737-724 (serial number 28940). It is configured with 2 engines and 149 seats. Registration status is listed as Valid, with ownership recorded under UNITED AIRLINES INC in Chicago, IL, United States. The profile includes 19 photos documenting this aircraft.
Latest photos of N23721
Mark Pasqualino
@ KORD
Mark Pasqualino
@ KIAH
Dariusz Jezewski www.FotoDj.com
@ KEWR
FerryPNL
@ KSNA
Recent Routes
NO LIVE DATA
United Airlines
| Time | Callsign | FL | Speed | Heading | Route |
|---|---|---|---|---|---|
| 2026-10-30 20:28 UTC | UAL1239 / UA1239 | — | 6 kt | 321° |
ORD → ROC
ORD
→
ROC
Chicago O'hare International Airport → Frederick Douglass/greater Rochester International Airport |
| 2026-10-30 17:48 UTC | UAL587 / UA587 | FL3 | 3 kt | 107° |
ORD → IAD
ORD
→
IAD
Chicago O'hare International Airport → Washington Dulles International Airport |
| 2026-10-30 05:22 UTC | UAL308 / UA308 | FL2 | 131 kt | 209° |
PHL → ORD
PHL
→
ORD
Philadelphia International Airport → Chicago O'hare International Airport |
| 2026-10-29 23:54 UTC | UAL1744 / UA1744 | — | 3 kt | 191° | — |
| 2026-10-29 19:00 UTC | UAL2287 / UA2287 | FL1 | 150 kt | 134° | — |
| 2026-10-29 15:04 UTC | UAL646 / UA646 | — | 1 kt | 113° |
EWR → SLC
EWR
→
SLC
Newark Liberty International Airport → Salt Lake City International Airport |
| 2026-10-29 01:26 UTC | UAL1401 / UA1401 | FL20 | 202 kt | 97° |
DFW → ORD
DFW
→
ORD
Dallas-fort Worth International Airport → Chicago O'hare International Airport |
| 2026-10-28 21:46 UTC | UAL1692 / UA1692 | — | 1 kt | 113° |
YVR → DEN
YVR
→
DEN
Vancouver International Airport → Denver International Airport |
| 2026-10-28 18:14 UTC | UAL2425 / UA2425 | FL3 | 137 kt | 328° | — |
| 2026-10-28 01:16 UTC | UAL1574 / UA1574 | — | 10 kt | 90° |
DFW → EWR
DFW
→
EWR
Dallas-fort Worth International Airport → Newark Liberty International Airport |
| 2026-10-27 22:14 UTC | UAL2454 / UA2454 | — | 15 kt | 301° |
EWR → BNA
EWR
→
BNA
Newark Liberty International Airport → Nashville International Airport |
| 2026-10-27 18:06 UTC | UAL2659 / UA2659 | — | 8 kt | 186° |
MSP → EWR
MSP
→
EWR
Minneapolis-st Paul Intl/wold-chamberlain Airport → Newark Liberty International Airport |
| 2026-10-27 14:48 UTC | UAL2690 / UA2690 | — | 6 kt | 225° |
EWR → MSP
EWR
→
MSP
Newark Liberty International Airport → Minneapolis-st Paul Intl/wold-chamberlain Airport |
| 2026-10-27 10:16 UTC | UAL2304 / UA2304 | — | 0 kt | 259° |
EWR → ATL
EWR
→
ATL
Newark Liberty International Airport → Hartsfield/jackson Atlanta International Airport |
| 2026-10-27 03:26 UTC | UAL2410 / UA2410 | — | 7 kt | 138° |
IAD → SLC
IAD
→
SLC
Washington Dulles International Airport → Salt Lake City International Airport |
| 2026-10-26 20:02 UTC | UAL1348 / UA1348 | — | 16 kt | 90° |
DEN → SEA
DEN
→
SEA
Denver International Airport → Seattle-tacoma International Airport |
| 2026-10-26 03:12 UTC | UAL282 / UA282 | — | 17 kt | 28° | — |
| 2026-10-25 03:16 UTC | UAL2319 / UA2319 | FL0 | 129 kt | 208° | — |
| 2026-10-24 20:32 UTC | UAL1831 / UA1831 | — | 1 kt | 354° |
ATL → IAD
ATL
→
IAD
Hartsfield/jackson Atlanta International Airport → Washington Dulles International Airport |
| 2026-10-24 17:20 UTC | UAL2684 / UA2684 | — | 12 kt | 267° |
ORD → ATL
ORD
→
ATL
Chicago O'hare International Airport → Hartsfield/jackson Atlanta International Airport |
| 2026-10-24 14:02 UTC | UAL2401 / UA2401 | — | 1 kt | 135° |
ORD → BOS
ORD
→
BOS
Chicago O'hare International Airport → General Edward Lawrence Logan International Airport |
| 2026-10-24 03:22 UTC | UAL254 / UA254 | FL6 | 135 kt | 90° |
EWR → ORD
EWR
→
ORD
Newark Liberty International Airport → Chicago O'hare International Airport |
| 2026-10-24 01:12 UTC | UAL303 / UA303 | — | 5 kt | 121° | — |
| 2026-10-23 22:34 UTC | UAL664 / UA664 | FL50 | 224 kt | 274° |
LAS → ORD
LAS
→
ORD
Harry Reid International Airport → Chicago O'hare International Airport |
| 2026-10-23 20:16 UTC | UAL1888 / UA1888 | — | 12 kt | 37° |
DEN → ORD
DEN
→
ORD
Denver International Airport → Chicago O'hare International Airport |
| 2026-10-23 17:20 UTC | UAL1904 / UA1904 | — | 3 kt | 270° |
ORD → DCA
ORD
→
DCA
Chicago O'hare International Airport → Ronald Reagan Washington Ntl Airport |
| 2026-10-23 01:18 UTC | UAL1009 / UA1009 | — | 0 kt | 118° |
SBA → ORD
SBA
→
ORD
Santa Barbara Municipal Airport → Chicago O'hare International Airport |
| 2026-10-22 19:36 UTC | UAL1008 / UA1008 | — | 3 kt | 90° |
ORD → SBA
ORD
→
SBA
Chicago O'hare International Airport → Santa Barbara Municipal Airport |
| 2026-10-22 14:00 UTC | UAL1113 / UA1113 | — | 4 kt | 188° | — |
| 2026-10-22 04:36 UTC | UAL1819 / UA1819 | FL6 | 138 kt | 351° | — |
| 2026-10-21 19:46 UTC | UAL1920 / UA1920 | FL4 | 2 kt | 135° |
STL → ORD
STL
→
ORD
St Louis Lambert International Airport → Chicago O'hare International Airport |
| 2026-10-21 17:20 UTC | UAL1044 / UA1044 | — | 10 kt | 242° |
ORD → STL
ORD
→
STL
Chicago O'hare International Airport → St Louis Lambert International Airport |
| 2026-10-20 19:36 UTC | UAL1993 / UA1993 | FL400 | 378 kt | 254° |
MCO → ORD
MCO
→
ORD
Orlando International Airport → Chicago O'hare International Airport |
| 2026-10-20 15:08 UTC | UAL2465 / UA2465 | — | 12 kt | 0° |
BNA → ORD
BNA
→
ORD
Nashville International Airport → Chicago O'hare International Airport |
| 2026-10-20 01:22 UTC | UAL739 / UA739 | — | 2 kt | 28° |
ORD → BNA
ORD
→
BNA
Chicago O'hare International Airport → Nashville International Airport |
| 2026-10-19 22:50 UTC | UAL1087 / UA1087 | — | 10 kt | 174° | — |
| 2026-10-19 19:38 UTC | UAL1687 / UA1687 | FL5 | 142 kt | 224° | — |
| 2026-10-19 15:44 UTC | UAL2052 / UA2052 | FL3 | 137 kt | 90° | — |
| 2026-10-19 03:36 UTC | UAL1794 / UA1794 | FL12 | 139 kt | 178° | — |
| 2026-10-19 01:18 UTC | UAL643 / UA643 | FL0 | 128 kt | 90° |
LAS → SFO
LAS
→
SFO
Harry Reid International Airport → San Francisco International Airport |
| 2026-10-18 20:50 UTC | UAL1533 / UA1533 | FL7 | 130 kt | 209° | — |
| 2026-10-18 12:52 UTC | UAL2670 / UA2670 | FL0 | 129 kt | 90° | — |
| 2026-10-18 02:34 UTC | UAL1949 / UA1949 | — | 8 kt | 270° | — |
| 2026-10-17 23:08 UTC | UAL1853 / UA1853 | FL1 | 144 kt | 270° | — |
| 2026-10-17 20:28 UTC | UAL1852 / UA1852 | FL142 | 324 kt | 251° |
SFO → DFW
SFO
→
DFW
San Francisco International Airport → Dallas-fort Worth International Airport |
| 2026-10-17 18:12 UTC | UAL2190 / UA2190 | FL1 | 149 kt | 89° | — |
| 2026-10-17 13:44 UTC | UAL1077 / UA1077 | FL-3 | 124 kt | 356° |
ORD → DCA
ORD
→
DCA
Chicago O'hare International Airport → Ronald Reagan Washington Ntl Airport |
| 2026-10-17 02:06 UTC | UAL3917 / UA3917 | — | 18 kt | 56° | — |
| 2026-10-16 14:14 UTC | UAL2856 / UA2856 | — | 19 kt | 76° |
AUS → ORD
AUS
→
ORD
Austin-bergstrom International Airport → Chicago O'hare International Airport |
| 2026-10-16 03:56 UTC | UAL1476 / UA1476 | — | 11 kt | 70° | — |
| 2026-10-15 22:42 UTC | UAL2207 / UA2207 | FL14 | 126 kt | 0° |
PHL → ORD
PHL
→
ORD
Philadelphia International Airport → Chicago O'hare International Airport |
| 2026-10-15 19:54 UTC | UAL2138 / UA2138 | — | 15 kt | 90° |
ORD → SAN
ORD
→
SAN
Chicago O'hare International Airport → San Diego International Airport |
| 2026-10-15 16:44 UTC | UAL1297 / UA1297 | FL8 | 132 kt | 81° |
KAZ3 → DEN
KAZ3 →
DEN
KAZ3 → Denver International Airport |
| 2026-10-15 14:14 UTC | UAL1332 / UA1332 | — | 14 kt | 0° |
ORD → LGA
ORD
→
LGA
Chicago O'hare International Airport → Laguardia Airport |
| 2026-10-15 03:56 UTC | UAL1394 / UA1394 | FL9 | 132 kt | 132° |
ORD → SAT
ORD
→
SAT
Chicago O'hare International Airport → San Antonio International Airport |
| 2026-10-14 23:58 UTC | UAL2747 / UA2747 | — | 13 kt | 70° | — |
| 2026-10-14 20:28 UTC | UAL580 / UA580 | FL7 | 129 kt | 307° | — |
| 2026-10-14 10:40 UTC | UAL2112 / UA2112 | — | 15 kt | 326° | — |
| 2026-10-14 06:10 UTC | UAL457 / UA457 | FL9 | 142 kt | 230° |
ORD → CLE
ORD
→
CLE
Chicago O'hare International Airport → Cleveland-hopkins International Airport |
| 2026-10-14 01:12 UTC | UAL1127 / UA1127 | — | 30 kt | 242° |
BNA → ORD
BNA
→
ORD
Nashville International Airport → Chicago O'hare International Airport |
| 2026-10-13 22:26 UTC | UAL1897 / UA1897 | — | 20 kt | 45° |
ORD → BNA
ORD
→
BNA
Chicago O'hare International Airport → Nashville International Airport |
| 2026-10-13 18:34 UTC | UAL2632 / UA2632 | FL9 | 130 kt | 271° | — |
| 2026-10-13 16:18 UTC | UAL473 / UA473 | FL9 | 140 kt | 224° | — |
| 2026-10-12 19:40 UTC | UAL2443 / UA2443 | — | 2 kt | 101° | — |
| 2026-10-12 16:54 UTC | UAL2389 / UA2389 | FL7 | 134 kt | 230° |
LGA → ORD
LGA
→
ORD
Laguardia Airport → Chicago O'hare International Airport |
| 2026-10-11 23:18 UTC | UAL654 / UA654 | — | 1 kt | 231° |
DCA → ORD
DCA
→
ORD
Ronald Reagan Washington Ntl Airport → Chicago O'hare International Airport |
| 2026-10-11 19:58 UTC | UAL654T / UA654T | FL0 | 105 kt | 356° | — |
| 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° |
DEN → MCO
DEN
→
MCO
Denver International Airport → Orlando 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° | — |
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 |