Best Time to Fly GEG to SEA: On-Time Stats by Hour & Airline
Spokane International → Seattle/Tacoma International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 86.0% of Spokane (GEG) to Seattle (SEA) flights arrived on time (5,024 scheduled flights). That is 8.3 points above the national average of 77.6%.
Among 3 airlines, Delta Air Lines led with 93.8% on time and Alaska Airlines was last with 81.1%.
Over 24 months, Tuesday was the most reliable day (87% on time) and July the worst month (79%).
The cancellation rate was 1.0% (US average 1.8%).
GEG to SEA 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 |
|---|---|---|---|---|
| Delta Air Lines | 93.8% | 127 min | 1.2% | 343 |
| SkyWest Airlines | 88.0% | 66 min | 1.1% | 2,918 |
| Alaska Airlines | 81.1% | 47 min | 1.0% | 1,763 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly GEG to SEA
On-time arrival % by scheduled departure hour (local time), 10,370 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 92.8% | 0.7% | 1,076 |
| 6am–7am | 91.2% | 0.5% | 1,042 |
| 7am–8am | 88.9% | 0.2% | 1,180 |
| 8am–9am | 86.5% | 0.5% | 387 |
| 9am–10am | 78.5% | 0.6% | 829 |
| 10am–11am | 84.2% | 0.0% | 171 |
| 11am–12pm | 83.7% | 1.2% | 878 |
| 12pm–1pm | 85.7% | 1.3% | 156 |
| 1pm–2pm | 77.3% | 0.5% | 1,322 |
| 2pm–3pm | 87.4% | 2.3% | 219 |
| 3pm–4pm | 82.1% | 0.3% | 984 |
| 4pm–5pm | 79.1% | 0.0% | 215 |
| 5pm–6pm | 80.0% | 0.8% | 760 |
| 6pm–7pm | 62.9% | 1.7% | 118 |
| 7pm–8pm | 80.4% | 0.9% | 994 |
| 8pm–9pm | 87.2% | 0.0% | 39 |
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 SEA
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) | 83.3% | -1.5 pts | 0.0% | 194 |
| Christmas & New Year (Dec 20 - Jan 3) | 84.7% | -0.1 pts | 0.3% | 348 |
| Summer peak (Jun 15 - Aug 15) | 80.2% | -4.6 pts | 0.5% | 1,880 |
| All other days | 84.8% | — | 0.7% | 7,948 |
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).