Flight number record
OO 6390
SkyWest Airlines · Colorado Springs to Dallas-Fort Worth
- Route
- COS → DFW
- Departs
- 08:15
- Flights
- 332
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 6390, check with SkyWest Airlines. SkyWest Airlines flies under contract for larger airlines, so a ticket for this flight may show a different airline code and number.
OO 6390 lands a B, 2 points better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by about 2.5 hours on average. That rests on 332 flights, with a median arrival 14 minutes early.
Key figures
On time
79.1%
Arrivals under 15 minutes late, of 325 completed flights
Avg delay
152 min
Across delayed arrivals only, not all flights
Cancelled
1.81%
National rate is 1.89%
1 hour+ late
11.7%
National rate is 8.3%
These figures cover 332 flights between September 2025 and August 2026. Beyond the headline rate, 11.7% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When OO 6390 flies
OO 6390 flies COS to DFW without a single fixed slot. Its most common scheduled departure was 08:15, used on 49 of 332 flights, with 07:00 (42 flights) and 07:38 (39 flights) next.
- Departs 08:1549 flights14.8%
- Departs 07:0042 flights12.7%
- Departs 07:3839 flights11.7%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 08:15 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and OO 6390 runs 5 points worse at 79.1%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
OO 6390 next to COS to DFW
Every carrier on COS to DFW combined arrived on time 77.9% of the time across 1,933 flights, so OO 6390 is about level with it. SkyWest flew 696 flights on the same city pair under all its flight numbers, including this one, and those ran 76.9% on time. Across its whole network SkyWest Airlines managed 78.7%, close to this flight's figure.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 6390thin sample | 332 | 79.1% | 152 min | 1.81% | B |
| All SkyWest Airlines on COS–DFW | 696 | 76.9% | 127 min | 2.16% | B |
| All carriers on COS–DFW | 1,933 | 77.9% | 112 min | 2.22% | B |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 6390 quarter by quarter
OO 6390 did not run the same all year. Its best quarter was Jul–Sep 2025 at 90.0% on time and its weakest Jul–Sep 2026 at 60.0%, a swing of 30 points on roughly 66 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
- Jul–Sep 202530 flights90.0%
- Oct–Dec 202592 flights84.8%
- Jan–Mar 202690 flights77.4%
- Apr–Jun 202685 flights78.6%
- Jul–Sep 202635 flights60.0%
Scale runs 50% to 95%.
By weekday, OO 6390 ranged from 73.3% on Saturday to 84.8% on Wednesday. With about 47 flights behind each day, a spread of 12 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late OO 6390 runs when it is late
OO 6390 often beats the schedule: 153 of 325 completed flights, 47%, arrived 15 minutes or more early. When OO 6390 is late it tends to be very late: 38 of its 68 late arrivals were an hour or more behind, and 24 were two hours or more.
- 15+ min early153 flights47.1%
- Within 15 min104 flights32.0%
- 15–29 min late11 flights3.4%
- 30–59 min late19 flights5.8%
- 1–2 hours late14 flights4.3%
- 2+ hours late24 flights7.4%
Scale runs 0% to 100%.
Share of 325 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 67 departures that left 15 minutes late or more, only 7 made it up before arrival. 8 flights left on time and still arrived late.
The worst days
Worst days for OO 6390
The latest arrival of the period was on 26 October 2025, 23 hours 47 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 26 October 2025 | 23 hours 47 minutes | Carrier |
| 19 March 2026 | 9 hours 30 minutes | Carrier |
| 21 March 2026 | 8 hours 43 minutes | Late-arriving aircraft |
| 8 December 2025 | 8 hours 20 minutes | Carrier |
| 2 December 2025 | 8 hours 8 minutes | Carrier |
Delay causes
Why OO 6390 runs late
Carrier accounts for 80% of the 10,000 delay minutes carriers reported here, and the remaining four split what is left.
- 80%Carrier
- 10%Late-arriving aircraft
- 6%Extreme weather
- 4%National Airspace System
The largest share of delay minutes, 80%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 8,304 of the 10,000 delay minutes reported here. The split is drawn from 10,331 delay minutes reported on OO 6390.
Cancellations sit at 1.81% against a national 1.89%, which is ordinary. Diversions add another 0.30%.
Connections and routes
What a delay on this flight costs
11.7% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
The 592 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
The same number turns up on two other city pairs in the data, including DFW to COS (98) and COS to ORD (1), but none flew often enough under OO 6390 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to COS to DFW only.
One caution: this is a thin sample. 332 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking OO 6390
For a booking, read OO 6390 as 79.1% on time with 1.81% cancelled over 332 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- COS to DFW, every carrier and departure
- DFW to COS, the return direction
- Dallas/Fort Worth International (DFW) delay statistics
- SkyWest Airlines on-time record
- Every SkyWest Airlines flight number with a record
- The most and least reliable flight numbers in the US
- How often a connection fails at the major US hubs
A flight number here means SkyWest Airlines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.