Oakland (OAK) to Seattle (SEA): On-Time Performance
Data through July 2026
The calendar drives reliability on OAK–SEA. November 2024 flights landed on schedule 92% of the time, but June 2026 dropped to 65% — a gap of 27 points. Across the full period the route averages 78% 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
- 78%
- arrived <15 min late
- Avg delay
- 12 min
- completed flights
- Cancelled
- 0.5%
- Flights/day
- 5.1
- last 12 months
- Duration
- 2h 8m
- scheduled
- Distance
- 672 mi
Best airline from OAK to SEA
3 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Alaska Airlinesmost reliable | 82% | 10 min | 1.0% | 1,406 |
| Southwest Airlines | 76% | 12 min | 0.1% | 2,555 |
| SkyWest Airlines | 75% | 21 min | 1.3% | 151 |
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 (60%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 80% | 10 min |
| Tuesdaybest | 87% | 7 min |
| Wednesday | 81% | 10 min |
| Thursday | 74% | 14 min |
| Friday | 73% | 14 min |
| Saturday | 84% | 11 min |
| Sunday | 73% | 15 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft47%
- Airline operations32%
- National airspace system20%
- 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 2024-07 and 2026-07. The average arrival delay across completed flights was 12 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 1,406 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 (60%). 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 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from OAK to SEA?
- June 2026 was the roughest month in this dataset, with only 65% of arrivals on time. The best was November 2024 at 92%. If your dates are flexible, that 27-point gap is worth planning around.
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Based on 4,112 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.