San Luis Obispo (SBP) to Seattle (SEA): On-Time Performance
Data through July 2026
San Luis Obispo (SBP) to Seattle (SEA) is a thinner route than most in this dataset — 220 departures over the past year, roughly 4 a week — so treat these numbers as indicative rather than definitive. Of the flights that did operate, 78% arrived on time.
- On-time
- 78%
- arrived <15 min late
- Avg delay
- 15 min
- completed flights
- Cancelled
- 1.0%
- Flights/day
- 0.60
- last 12 months
- Duration
- 2h 30m
- scheduled
- Distance
- 847 mi
Best airline from SBP to SEA
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| SkyWest Airlinesmost reliable | 84% | 13 min | 0.8% | 236 |
| Alaska Airlines | 76% | 16 min | 1.1% | 466 |
Monthly on-time trend
Best time to fly from SBP to SEA
Aim for departures around 4 p.m. (91% on-time); avoid 7 p.m. departures (71%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 80% | 17 min |
| Tuesdaybest | 85% | 10 min |
| Wednesday | 79% | 14 min |
| Thursday | 81% | 14 min |
| Friday | 79% | 12 min |
| Saturday | 73% | 21 min |
| Sunday | 71% | 16 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft51%
- Airline operations19%
- National airspace system30%
- Weather1%
Frequently asked questions
- How often are flights from SBP to SEA delayed?
- 22% of SBP–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 15 minutes.
- Which airline is most reliable from SBP to SEA?
- SkyWest Airlines has the best on-time record on this route at 84%, based on 236 flights. 2 airlines flew SBP–SEA frequently enough to compare in this period.
- What is the best time of day to fly from SBP to SEA?
- Departures around 4 p.m. have the best record (91% on-time), while departures around 7 p.m. have the worst (71%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from SBP to SEA?
- The scheduled SBP–SEA flight time averages 2h 30m over 847 miles. Actual arrival times vary — flights on this route land 15+ minutes late 22% of the time.
- How often are SBP to SEA flights cancelled?
- 1% 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 SBP to SEA?
- June 2025 was the roughest month in this dataset, with only 47% of arrivals on time. The best was January 2025 at 97%. If your dates are flexible, that 50-point gap is worth planning around.
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Based on 702 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.