Best Time to Fly GEG to BOI: On-Time Stats by Hour & Airline
Spokane International → Boise Air Terminal
Data through July 2026 · Last updated October 18, 2026
336 flights were scheduled from Spokane (GEG) to Boise (BOI) in the last 12 months, and 89.8% of those that flew arrived on time, 12.2 points above the US average of 77.6%.
SkyWest Airlines was the only reporting airline with regular flights on this route.
Over 24 months, Saturday was the most reliable day (93% on time) and January the worst month (71%).
The cancellation rate was 0.3% (US average 1.8%).
GEG to BOI 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 | 89.8% | 56 min | 0.3% | 336 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly GEG to BOI
On-time arrival % by scheduled departure hour (local time), 812 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | Limited data | 25 | |
| 7am–8am | 91.4% | 0.0% | 35 |
| 9am–10am | 92.9% | 0.0% | 56 |
| 10am–11am | Limited data | 16 | |
| 11am–12pm | 86.3% | 1.0% | 96 |
| 1pm–2pm | 82.6% | 0.0% | 46 |
| 2pm–3pm | 94.2% | 0.0% | 52 |
| 4pm–5pm | 89.6% | 0.3% | 329 |
| 6pm–7pm | 80.0% | 0.0% | 105 |
| 7pm–8pm | 84.6% | 0.0% | 52 |
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 BOI
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 | 24 | ||
| Christmas & New Year (Dec 20 - Jan 3) | Limited data | 29 | ||
| Summer peak (Jun 15 - Aug 15) | 83.0% | -6.5 pts | 0.0% | 165 |
| All other days | 89.5% | — | 0.3% | 594 |
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).