Best Time to Fly GEG to SLC: On-Time Stats by Hour & Airline
Spokane International → Salt Lake City International
Data through July 2026 · Last updated October 18, 2026
1,671 flights were scheduled from Spokane (GEG) to Salt Lake City (SLC) in the last 12 months, and 90.5% of those that flew arrived on time, 12.9 points above the US average of 77.6%.
SkyWest Airlines was the most punctual of the 2 airlines on the route at 94.1%, while Delta Air Lines trailed at 87.8%.
April has been the best month (95% on time) and Friday the weakest day of the week (87%).
0.7% of flights were cancelled, versus 1.8% nationally.
GEG to SLC 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 | 94.1% | 74 min | 0.4% | 719 |
| Delta Air Lines | 87.8% | 92 min | 0.8% | 952 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly GEG to SLC
On-time arrival % by scheduled departure hour (local time), 3,330 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 90.8% | 0.4% | 480 |
| 6am–7am | 90.4% | 0.4% | 250 |
| 7am–8am | Limited data | 10 | |
| 9am–10am | 95.7% | 0.5% | 422 |
| 10am–11am | 91.2% | 0.0% | 274 |
| 12pm–1pm | Limited data | 24 | |
| 1pm–2pm | 85.0% | 0.3% | 705 |
| 4pm–5pm | 88.3% | 1.4% | 217 |
| 5pm–6pm | 87.5% | 0.2% | 492 |
| 6pm–7pm | 88.1% | 0.0% | 118 |
| 7pm–8pm | 89.3% | 0.0% | 338 |
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 SLC
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) | 86.7% | -3.8 pts | 0.0% | 60 |
| Christmas & New Year (Dec 20 - Jan 3) | 84.3% | -6.2 pts | 0.0% | 134 |
| Summer peak (Jun 15 - Aug 15) | 86.1% | -4.4 pts | 0.2% | 593 |
| All other days | 90.5% | — | 0.4% | 2,543 |
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).