Best Time to Fly GEG to PHX: On-Time Stats by Hour & Airline
Spokane International → Phoenix Sky Harbor International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 83.7% of Spokane (GEG) to Phoenix (PHX) flights arrived on time (1,258 scheduled flights). That is 6.1 points above the national average of 77.6%.
Southwest Airlines was the most punctual of the 3 airlines on the route at 85.7%, while Frontier Airlines trailed at 63.6%.
September has been the best month (95% on time) and Sunday the weakest day of the week (83%).
0.4% of flights were cancelled, versus 1.8% nationally.
GEG to PHX 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 | 85.7% | 47 min | 0.5% | 616 |
| American Airlines | 83.3% | 123 min | 0.2% | 587 |
| Frontier Airlines | 63.6% | 64 min | 2.2% | 45 |
| Envoy Air | Limited data | 10 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly GEG to PHX
On-time arrival % by scheduled departure hour (local time), 2,527 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 97.6% | 2.3% | 86 |
| 6am–7am | 89.5% | 0.1% | 861 |
| 7am–8am | 94.3% | 0.0% | 212 |
| 8am–9am | 91.9% | 0.0% | 37 |
| 9am–10am | Limited data | 1 | |
| 10am–11am | 93.4% | 1.6% | 62 |
| 11am–12pm | Limited data | 10 | |
| 12pm–1pm | 83.6% | 1.5% | 68 |
| 1pm–2pm | 82.2% | 0.0% | 129 |
| 2pm–3pm | 79.4% | 0.0% | 199 |
| 3pm–4pm | 81.8% | 0.1% | 671 |
| 4pm–5pm | 73.5% | 0.0% | 68 |
| 5pm–6pm | 72.4% | 0.0% | 58 |
| 6pm–7pm | 73.5% | 0.0% | 50 |
| 7pm–8pm | Limited data | 12 | |
| 8pm–9pm | Limited data | 3 | |
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 PHX
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) | 86.8% | +0.7 pts | 0.0% | 53 |
| Christmas & New Year (Dec 20 - Jan 3) | 75.4% | -10.6 pts | 0.0% | 114 |
| Summer peak (Jun 15 - Aug 15) | 85.6% | -0.4 pts | 0.2% | 406 |
| All other days | 86.1% | — | 0.3% | 1,954 |
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).