Flight profile · SkyWest Airlines
OO4638
Chicago (ORD) to Colorado Springs (COS) · scheduled 7:50 PM – 9:39 PM
How OO4638 performs
564 operations, 2024-05-23 to 2026-06-30.
OO4638 arrived on time 58.9% of the time, against 71.5% for all ORD → COS flights — this specific departure is 12.5 percentage points worse than the route as a whole. Against SkyWest Airlines’s own flights on this route it is 10.4 points worse.
Source: US DOT Bureau of Transportation Statistics · 564 operations between 2024-05-23 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| OO4638 | 58.9% | 2.13% | 6 min | 15.3% | 564 |
| SkyWest Airlines on ORD → COS | 69.3% | 1.35% | 0 min | 11.2% | 1,781 |
| All ORD → COS flights | 71.5% | 1.10% | -1 min | 10.0% | 2,267 |
Source: FlyerIntel analysis of US DOT BTS data · 2024-05-23 to 2026-06-30
Other routes OO4638 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 |
|---|---|---|---|
| ABQ→IAH Albuquerque to Houston | 2026-05-02 – 2026-05-16 | 3 | — |
| DEN→PIA Denver to Peoria | 2026-03-05 – 2026-03-28 | 24 | — |
| AVP→ORD Wilkes-Barre/Scranton to Chicago | 2026-02-13 – 2026-03-04 | 20 | — |
| BOI→SFO Boise to San Francisco | 2026-02-12 – 2026-02-12 | 1 | — |
| SFO→FAT San Francisco to Fresno | 2026-01-06 – 2026-02-11 | 37 | — |
| DEN→LEX Denver to Lexington | 2025-11-27 – 2025-11-27 | 1 | — |
| ABQ→SFO Albuquerque to San Francisco | 2025-09-25 – 2025-10-25 | 31 | — |
| OKC→DEN Oklahoma City to Denver | 2025-03-06 – 2025-03-29 | 24 | — |
| ASE→DEN Aspen to Denver | 2024-02-15 – 2025-03-05 | 57 | — |
| BNA→ORD Nashville to Chicago | 2025-01-07 – 2025-02-12 | 37 | — |
| ORD→ORF Chicago to Norfolk | 2024-12-24 – 2024-12-31 | 2 | — |
| FAT→LAX Fresno to Los Angeles | 2024-11-28 – 2024-11-28 | 1 | — |
| ORD→ASE Chicago to Aspen | 2024-07-04 – 2024-07-04 | 1 | — |
| AVL→ORD Asheville to Chicago | 2024-05-02 – 2024-05-22 | 21 | — |
| TUL→IAH Tulsa to Houston | 2024-05-01 – 2024-05-01 | 1 | — |
| ABQ→ORD Albuquerque to Chicago | 2024-03-31 – 2024-04-28 | 15 | — |
| BNA→IAH Nashville to Houston | 2024-01-09 – 2024-02-14 | 37 | — |
| ASE→ORD Aspen to Chicago | 2023-12-21 – 2024-01-08 | 19 | — |
| BHM→ORD Birmingham to Chicago | 2023-09-06 – 2023-12-20 | 104 | 77.9% |
| DEN→FAR Denver to Fargo | 2023-09-05 – 2023-09-05 | 1 | — |
| BIL→DEN Billings to Denver | 2023-07-05 – 2023-09-04 | 62 | — |
| CPR→DEN Casper to Denver | 2023-07-02 – 2023-07-04 | 3 | — |
Because the same number has served different journeys, the statistics above describe only the route OO4638 currently operates. Blending them would produce an average of two different flights.
Why OO4638 runs late
Where US DOT attributed the delay minutes on this flight.
the inbound aircraft was late, so this flight started late
airspace and airport capacity, including weather-driven flow control
crew, maintenance, boarding, fuelling — within the carrier’s control
weather severe enough to stop this flight specifically
Share of the delay minutes US DOT attributed to each cause for OO4638 on ORD → COS. A single late flight can carry more than one cause, and only delays of fifteen minutes or more are attributed at all.
Data and methodology
Calculated by FlyerIntel from 564 records of OO4638 operating ORD → COS, 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.
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