No delays reported for OO 4638 (ORD → COS) as of 6:46 PM ET. It arrived on time 63.2% of the time in June-August 2026. When it was late, the average delay was 1h 38m. 5.4% of flights were cancelled. Right now there are no reported delays at ORD, COS.
High cancellation risk
Next leg ORD → COS, scheduled 7:45 PM local time. No delays at ORD right now. Line up a backup option.
5.4% of its flights were cancelled in June-August 2026; rough weather at COS.
Estimate from the schedule, live position and airport conditions, if this flight operates today. Check SkyWest for official times. Live position: adsb.lol (open data, ODbL).
Book a backup seat ORD → COSThis flight is cancelled often; a refundable backup costs little
What to do now
Some links are affiliate links.
Route and schedule
| Leg | Scheduled | On time |
|---|---|---|
| ORD → COS Chicago, IL to Colorado Springs, CO | 7:45 PM → 9:55 PM | 63% |
Local times. Schedules change; check your booking.
How reliable is OO 4638?
| Arrived on time (within 15 min) | 63.2% |
| Average delay when late | 98 min |
| Cancelled | 5.4% |
| Diverted | 0% |
| Flights tracked | 92 |
Best and worst days to fly OO 4638
OO 4638 was most reliable on Saturdays (100% on time) and least reliable on Mondays (50%).
| Monday | |
| Tuesday | |
| Wednesday | |
| Thursday | |
| Friday | |
| Saturday | |
| Sunday |
Why it runs late
| Late-arriving plane | |
| Airline (crew, maintenance) | |
| Air traffic system | |
| Extreme weather |
Share of delay minutes by cause, as reported by SkyWest to the Department of Transportation.
Other flights ORD → COS
All flights on this route, ranked
Live status at its airports
We show airport-wide airport status, not this flight's gate or live position. For that, check the SkyWest app.
About this data
On-time history: U.S. Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, June-August 2026. Live conditions: live airport status. "On time" means arriving within 15 minutes of schedule.
Common questions
Is OO 4638 delayed today?
Right now there are no reported delays at ORD, COS. Checked 6:46 PM ET. For this flight's gate and exact status, check the SkyWest app.
Is OO 4638 usually on time?
OO 4638 arrived within 15 minutes of schedule 63.2% of the time in June-August 2026, with an average delay of 98 minutes when late.
How often is OO 4638 cancelled?
5.4% of OO 4638 flights were cancelled in June-August 2026.