Best Time to Fly EUG to SEA: On-Time Stats by Hour & Airline
Mahlon Sweet Field → Seattle/Tacoma International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 88.2% of Eugene (EUG) to Seattle (SEA) flights arrived on time (1,933 scheduled flights). That is 10.6 points above the national average of 77.6%.
Alaska Airlines was the most punctual of the 2 airlines on the route at 88.3%, while SkyWest Airlines trailed at 88.2%.
April has been the best month (93% on time) and Friday the weakest day of the week (84%).
1.4% of flights were cancelled, versus 1.8% nationally.
EUG 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 |
|---|---|---|---|---|
| Alaska Airlines | 88.3% | 56 min | 1.2% | 328 |
| SkyWest Airlines | 88.2% | 66 min | 1.4% | 1,605 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly EUG to SEA
On-time arrival % by scheduled departure hour (local time), 3,630 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 95.1% | 1.4% | 355 |
| 6am–7am | 91.3% | 1.0% | 595 |
| 7am–8am | 92.0% | 0.7% | 152 |
| 8am–9am | 77.4% | 0.7% | 441 |
| 9am–10am | 89.6% | 1.9% | 108 |
| 10am–11am | Limited data | 20 | |
| 11am–12pm | 89.4% | 0.9% | 636 |
| 12pm–1pm | 84.9% | 0.0% | 86 |
| 1pm–2pm | 72.3% | 1.0% | 313 |
| 3pm–4pm | 93.1% | 0.8% | 117 |
| 4pm–5pm | Limited data | 28 | |
| 5pm–6pm | 88.9% | 0.9% | 671 |
| 7pm–8pm | 65.7% | 0.0% | 108 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on EUG 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) | 90.2% | +2.7 pts | 0.0% | 51 |
| Christmas & New Year (Dec 20 - Jan 3) | 91.2% | +3.7 pts | 0.0% | 113 |
| Summer peak (Jun 15 - Aug 15) | 82.0% | -5.5 pts | 0.3% | 675 |
| All other days | 87.5% | — | 1.1% | 2,791 |
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).