Best Time to Fly SAN to MKE: On-Time Stats by Hour & Airline
San Diego International → General Mitchell International
Data through July 2026 · Last updated October 18, 2026
193 flights were scheduled from San Diego (SAN) to Milwaukee (MKE) in the last 12 months, and 73.4% of those that flew arrived on time, 4.2 points below the US average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
Over 24 months, Sunday was the most reliable day (81% on time) and July the worst month (69%).
The cancellation rate was 0.0% (US average 1.8%).
SAN to MKE 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 | 73.4% | 50 min | 0.0% | 193 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly SAN to MKE
On-time arrival % by scheduled departure hour (local time), 202 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | Limited data | 5 | |
| 8am–9am | Limited data | 8 | |
| 9am–10am | Limited data | 8 | |
| 10am–11am | 63.3% | 0.0% | 30 |
| 11am–12pm | Limited data | 13 | |
| 12pm–1pm | 88.6% | 0.0% | 44 |
| 1pm–2pm | 61.9% | 0.0% | 42 |
| 2pm–3pm | Limited data | 1 | |
| 3pm–4pm | Limited data | 4 | |
| 4pm–5pm | Limited data | 24 | |
| 5pm–6pm | Limited data | 23 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on SAN to MKE
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 | 6 | ||
| Christmas & New Year (Dec 20 - Jan 3) | Limited data | 11 | ||
| Summer peak (Jun 15 - Aug 15) | 67.3% | -11.0 pts | 0.0% | 55 |
| All other days | 78.3% | — | 0.0% | 130 |
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).