Best Time to Fly COS to PHX: On-Time Stats by Hour & Airline
City of Colorado Springs Municipal → Phoenix Sky Harbor International
Data through July 2026 · Last updated October 18, 2026
1,001 flights were scheduled from Colorado Springs (COS) to Phoenix (PHX) in the last 12 months, and 81.6% of those that flew arrived on time, 4.0 points above the US average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
Over 24 months, Saturday was the most reliable day (89% on time) and June the worst month (72%).
The cancellation rate was 0.1% (US average 1.8%).
COS to PHX on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| Southwest Airlines | 81.6% | 58 min | 0.1% | 1,001 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly COS to PHX
On-time arrival % by scheduled departure hour (local time), 1,960 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 95.8% | 1.6% | 122 |
| 6am–7am | 95.0% | 0.3% | 304 |
| 7am–8am | 91.6% | 0.5% | 203 |
| 8am–9am | 81.8% | 0.0% | 44 |
| 9am–10am | Limited data | 19 | |
| 10am–11am | 93.5% | 0.0% | 46 |
| 11am–12pm | 85.4% | 0.0% | 179 |
| 12pm–1pm | 83.3% | 0.0% | 162 |
| 1pm–2pm | 75.6% | 1.1% | 87 |
| 2pm–3pm | 66.7% | 0.0% | 36 |
| 3pm–4pm | 94.3% | 0.0% | 35 |
| 4pm–5pm | 70.0% | 0.0% | 172 |
| 5pm–6pm | 83.2% | 0.0% | 209 |
| 6pm–7pm | 60.6% | 0.0% | 104 |
| 7pm–8pm | 70.1% | 0.0% | 117 |
| 8pm–9pm | 81.4% | 0.0% | 86 |
| 9pm–10pm | 54.3% | 0.0% | 35 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on COS to PHX
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 74.4% | -10.2 pts | 0.0% | 39 |
| Christmas & New Year (Dec 20 - Jan 3) | 83.7% | -0.9 pts | 0.0% | 86 |
| Summer peak (Jun 15 - Aug 15) | 76.7% | -7.9 pts | 0.3% | 336 |
| All other days | 84.6% | — | 0.3% | 1,499 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).