Best Time to Fly GEG to SAN: On-Time Stats by Hour & Airline
Spokane International → San Diego International
Data through July 2026 · Last updated October 18, 2026
419 flights were scheduled from Spokane (GEG) to San Diego (SAN) in the last 12 months, and 88.2% of those that flew arrived on time, 10.6 points above the US average of 77.6%.
Alaska Airlines was the most punctual of the 2 airlines on the route at 91.4%, while Southwest Airlines trailed at 66.7%.
April has been the best month (98% on time) and Thursday the weakest day of the week (83%).
0.7% of flights were cancelled, versus 1.8% nationally.
GEG 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 |
|---|---|---|---|---|
| Alaska Airlines | 91.4% | 41 min | 0.8% | 364 |
| Southwest Airlines | 66.7% | 40 min | 0.0% | 55 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly GEG to SAN
On-time arrival % by scheduled departure hour (local time), 741 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | 90.5% | 0.0% | 74 |
| 7am–8am | 90.9% | 1.5% | 549 |
| 8am–9am | 76.9% | 0.0% | 52 |
| 10am–11am | Limited data | 6 | |
| 11am–12pm | Limited data | 13 | |
| 12pm–1pm | 50.0% | 0.0% | 35 |
| 3pm–4pm | Limited data | 12 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on GEG 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 | 13 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 66.7% | -25.3 pts | 0.0% | 30 |
| Summer peak (Jun 15 - Aug 15) | 78.6% | -13.4 pts | 0.6% | 156 |
| All other days | 92.0% | — | 1.3% | 542 |
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).