Best Time to Fly OAK to SEA: On-Time Stats by Hour & Airline
Oakland International → Seattle/Tacoma International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 77.6% of Oakland (OAK) to Seattle (SEA) flights arrived on time (1,879 scheduled flights). That is in line with the national average of 77.6%.
Alaska Airlines was the most punctual of the 3 airlines on the route at 81.2%, while Southwest Airlines trailed at 75.2%.
February has been the best month (89% on time) and Sunday the weakest day of the week (73%).
0.8% of flights were cancelled, versus 1.8% nationally.
OAK 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 | 81.2% | 53 min | 1.4% | 734 |
| SkyWest Airlines | 79.0% | 56 min | 5.0% | 40 |
| Southwest Airlines | 75.2% | 49 min | 0.3% | 1,105 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly OAK to SEA
On-time arrival % by scheduled departure hour (local time), 3,879 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 98.0% | 1.0% | 99 |
| 6am–7am | 94.1% | 0.5% | 831 |
| 7am–8am | 93.2% | 1.3% | 239 |
| 8am–9am | 75.6% | 1.1% | 91 |
| 9am–10am | 83.4% | 0.0% | 157 |
| 10am–11am | 77.8% | 0.0% | 216 |
| 11am–12pm | 84.9% | 0.9% | 107 |
| 12pm–1pm | 83.7% | 0.0% | 301 |
| 1pm–2pm | 71.8% | 0.0% | 170 |
| 2pm–3pm | 66.0% | 0.9% | 436 |
| 3pm–4pm | 76.7% | 0.8% | 117 |
| 4pm–5pm | 71.5% | 0.0% | 123 |
| 5pm–6pm | 62.0% | 0.6% | 180 |
| 6pm–7pm | 76.8% | 0.4% | 273 |
| 7pm–8pm | 65.5% | 0.0% | 119 |
| 8pm–9pm | 62.1% | 0.9% | 229 |
| 9pm–10pm | 62.1% | 0.0% | 174 |
| 10pm–11pm | Limited data | 17 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on OAK 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) | 88.7% | +7.2 pts | 0.0% | 71 |
| Christmas & New Year (Dec 20 - Jan 3) | 73.7% | -7.8 pts | 0.6% | 157 |
| Summer peak (Jun 15 - Aug 15) | 70.5% | -11.0 pts | 0.3% | 895 |
| All other days | 81.5% | — | 0.5% | 2,756 |
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).