Oakland (OAK) to Seattle (SEA): On-Time Performance
Data through May 2026
The calendar drives reliability on OAK–SEA. November 2024 flights landed on schedule 92% of the time, but June 2024 dropped to 64% — a gap of 28 points. Across the full period the route averages 79% on-time against a national 78%. Morning departures also hold up better than evening ones (90% vs 65%), which matters most in the rough months.
- On-time
- 79%
- arrived <15 min late
- Avg delay
- 11 min
- completed flights
- Cancelled
- 0.5%
- Flights/day
- 5.3
- last 12 months
- Duration
- 2h 8m
- scheduled
- Distance
- 672 mi
Best airline from OAK to SEA
3 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Alaska Airlinesmost reliable | 82% | 10 min | 1.1% | 1,290 |
| Southwest Airlines | 77% | 12 min | 0.1% | 2,465 |
| SkyWest Airlines | 74% | 20 min | 1.1% | 181 |
Monthly on-time trend
Best time to fly from OAK to SEA
Aim for departures around 5 a.m. (98% on-time); avoid 8 p.m. departures (57%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 79% | 11 min |
| Tuesdaybest | 88% | 7 min |
| Wednesday | 82% | 9 min |
| Thursday | 75% | 13 min |
| Friday | 72% | 15 min |
| Saturday | 83% | 11 min |
| Sunday | 73% | 14 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft46%
- Airline operations32%
- National airspace system21%
- Weather1%
Frequently asked questions
- How often are flights from OAK to SEA delayed?
- 22% of OAK–SEA flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 11 minutes.
- Which airline is most reliable from OAK to SEA?
- Alaska Airlines has the best on-time record on this route at 82%, based on 1,290 flights. 3 airlines flew OAK–SEA frequently enough to compare in this period.
- What is the best time of day to fly from OAK to SEA?
- Departures around 5 a.m. have the best record (98% on-time), while departures around 8 p.m. have the worst (57%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from OAK to SEA?
- The scheduled OAK–SEA flight time averages 2h 8m over 672 miles. Actual arrival times vary — flights on this route land 15+ minutes late 22% of the time.
- How often are OAK to SEA flights cancelled?
- 0.5% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below the national rate of 1.6%.
- What is the worst month to fly from OAK to SEA?
- June 2024 was the roughest month in this dataset, with only 64% of arrivals on time. The best was November 2024 at 92%. If your dates are flexible, that 28-point gap is worth planning around.
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Based on 3,936 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.