Flight profile · United Airlines
UA623
New York (LGA) to Chicago (ORD) · scheduled 9:15 AM – 10:55 AM
How UA623 performs
940 operations, 2023-07-01 to 2026-06-30.
UA623 arrived on time 87.0% of the time, against 75.2% for all LGA → ORD flights — this specific departure is 11.9 percentage points better than the route as a whole. Against United Airlines’s own flights on this route it is 10.8 points better.
Source: US DOT Bureau of Transportation Statistics · 940 operations between 2023-07-01 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| UA623 | 87.0% | 2.77% | -13 min | 4.4% | 940 |
| United Airlines on LGA → ORD | 76.3% | 2.73% | -7 min | 10.3% | 13,310 |
| All LGA → ORD flights | 75.2% | 3.18% | -7 min | 11.1% | 32,930 |
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-01 to 2026-06-30
By day of week
Does UA623 run worse on particular days?
Monday is historically the most reliable day and Wednesday the least, a gap of 5.5 percentage points.
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-01 to 2026-06-30 · Days with fewer than 120 operations are not scored.
Other routes UA623 has flown
A flight number is a slot in a schedule, and carriers reassign it. These are the other city pairs this number served in the analysis period.
| Route | Operated | Flights | On time |
|---|---|---|---|
| ORD→BZN Chicago to Bozeman | 2026-05-21 – 2026-06-30 | 41 | — |
| ORD→ABQ Chicago to Albuquerque | 2026-04-30 – 2026-05-20 | 15 | — |
| DEN→ECP Denver to Panama City Beach | 2026-05-02 – 2026-05-16 | 3 | — |
| ORD→SEA Chicago to Seattle | 2026-03-29 – 2026-04-29 | 32 | — |
| ORD→RSW Chicago to Fort Myers | 2026-03-05 – 2026-03-28 | 24 | — |
| RSW→LAX Fort Myers to Los Angeles | 2026-03-08 – 2026-03-25 | 6 | — |
| SBA→SFO Santa Barbara to San Francisco | 2026-02-14 – 2026-02-28 | 3 | — |
| SLC→IAH Salt Lake City to Houston | 2025-12-25 – 2026-01-03 | 10 | — |
| PBI→ORD West Palm Beach to Chicago | 2025-12-20 – 2025-12-20 | 1 | — |
| SFO→KOA San Francisco to Kailua-Kona | 2025-11-01 – 2025-11-29 | 5 | — |
| ORD→DEN Chicago to Denver | 2025-09-25 – 2025-10-25 | 31 | — |
| ORD→ALB Chicago to Albany | 2025-08-19 – 2025-09-24 | 37 | — |
| IAH→ATL Houston to Atlanta | 2025-06-28 – 2025-08-16 | 8 | — |
| RNO→IAH Reno to Houston | 2025-05-24 – 2025-06-21 | 5 | — |
| MCI→DEN Kansas City to Denver | 2025-05-03 – 2025-05-17 | 3 | — |
| FLL→IAH Fort Lauderdale to Houston | 2023-12-25 – 2025-04-26 | 17 | — |
| IAH→SRQ Houston to Sarasota/Bradenton | 2025-03-08 – 2025-03-29 | 4 | — |
| SFO→SAN San Francisco to San Diego | 2024-09-26 – 2025-03-01 | 34 | — |
| ORD→AUS Chicago to Austin | 2024-05-23 – 2025-02-10 | 113 | 79.1% |
| LAX→LAS Los Angeles to Las Vegas | 2025-01-06 – 2025-01-06 | 1 | — |
| IAH→FLL Houston to Fort Lauderdale | 2024-12-21 – 2025-01-03 | 13 | — |
| SAV→ORD Savannah to Chicago | 2024-12-19 – 2024-12-19 | 1 | — |
| IAD→SFO Washington to San Francisco | 2024-12-03 – 2024-12-18 | 16 | — |
| ORD→SFO Chicago to San Francisco | 2024-09-26 – 2024-10-26 | 31 | — |
| PHL→ORD Philadelphia to Chicago | 2024-10-01 – 2024-10-26 | 26 | — |
| ORD→TPA Chicago to Tampa | 2023-07-01 – 2024-03-30 | 113 | 73.0% |
| TPA→EWR Tampa to Newark | 2024-03-07 – 2024-03-30 | 24 | — |
Because the same number has served different journeys, the statistics above describe only the route UA623 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 940 records of UA623 operating LGA → ORD, published by the US DOT Bureau of Transportation Statistics. A flight counts as delayed when it arrives 15 or more minutes after schedule. Cancelled and diverted flights are excluded from the on-time rate and reported separately. Flight numbers are resolved as carrier plus number plus route, because the same number serves different routes over time.