Best Time to Fly MCI to SAN: On-Time Stats by Hour & Airline
Kansas City International → San Diego International
Data through July 2026 · Last updated October 18, 2026
385 flights were scheduled from Kansas City (MCI) to San Diego (SAN) in the last 12 months, and 75.3% of those that flew arrived on time, 2.4 points below the US average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
September has been the best month (91% on time) and Friday the weakest day of the week (66%).
0.3% of flights were cancelled, versus 1.8% nationally.
MCI to SAN 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 | 75.3% | 41 min | 0.3% | 385 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly MCI to SAN
On-time arrival % by scheduled departure hour (local time), 798 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | Limited data | 9 | |
| 6am–7am | Limited data | 25 | |
| 8am–9am | Limited data | 2 | |
| 9am–10am | Limited data | 2 | |
| 10am–11am | 83.0% | 0.0% | 141 |
| 11am–12pm | 87.4% | 0.0% | 103 |
| 12pm–1pm | 83.6% | 1.6% | 62 |
| 1pm–2pm | 78.0% | 0.0% | 100 |
| 2pm–3pm | 78.5% | 0.0% | 116 |
| 3pm–4pm | 78.4% | 0.0% | 74 |
| 4pm–5pm | 76.7% | 0.0% | 60 |
| 5pm–6pm | Limited data | 30 | |
| 6pm–7pm | 43.9% | 0.0% | 57 |
| 7pm–8pm | Limited data | 11 | |
| 8pm–9pm | Limited data | 5 | |
| 9pm–10pm | Limited data | 1 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on MCI to SAN
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) | Limited data | 18 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 52.9% | -27.8 pts | 0.0% | 35 |
| Summer peak (Jun 15 - Aug 15) | 69.4% | -11.3 pts | 0.0% | 147 |
| All other days | 80.7% | — | 0.3% | 598 |
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).