Best Time to Fly GEG to SFO: On-Time Stats by Hour & Airline
Spokane International → San Francisco International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 73.3% of Spokane (GEG) to San Francisco (SFO) flights arrived on time (896 scheduled flights). That is 4.3 points below the national average of 77.6%.
SkyWest Airlines was the most punctual of the 2 airlines on the route at 73.4%, while United Airlines trailed at 71.2%.
January has been the best month (87% on time) and Thursday the weakest day of the week (70%).
0.3% of flights were cancelled, versus 1.8% nationally.
GEG to SFO 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 |
|---|---|---|---|---|
| SkyWest Airlines | 73.4% | 79 min | 0.4% | 844 |
| United Airlines | 71.2% | 42 min | 0.0% | 52 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly GEG to SFO
On-time arrival % by scheduled departure hour (local time), 1,674 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | 82.3% | 0.3% | 358 |
| 7am–8am | 70.4% | 0.0% | 322 |
| 8am–9am | Limited data | 3 | |
| 12pm–1pm | 78.8% | 0.3% | 323 |
| 1pm–2pm | 42.5% | 0.0% | 40 |
| 2pm–3pm | 78.6% | 0.0% | 70 |
| 3pm–4pm | 88.4% | 0.7% | 296 |
| 4pm–5pm | 85.3% | 0.6% | 159 |
| 6pm–7pm | 76.9% | 2.5% | 40 |
| 7pm–8pm | 33.9% | 1.6% | 63 |
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 SFO
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 | 26 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 69.8% | -8.9 pts | 0.0% | 43 |
| Summer peak (Jun 15 - Aug 15) | 74.7% | -3.9 pts | 0.6% | 359 |
| All other days | 78.6% | — | 0.4% | 1,246 |
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).