SEA to SBP flight delays
Seattle, WA (SEA) San Luis Obispo, CA (SBP) · 847 miles
251 flights · January 2025 – August 2026 · US Bureau of Transportation Statistics
80.65%
Arrived on time
Within 15 minutes of schedule
0.8%
Cancelled
Share of scheduled flights
50 min
When late, late by
Average across delayed arrivals
11 min
Delay per flight
Averaged over every flight flown
What the record says about this route
The season swings this route hard. In April it ran 30 points more punctual than in December — a difference bigger than the one between the best and worst airlines on most routes. If the date is flexible, it is worth more than the carrier.
Only Alaska Airlines flies this route in the published record, so there is no choice to weigh — the route's figures and the airline's are the same figures.
This is a thin route — 251 flights across the whole period. On a route this infrequent a cancellation is far more costly than the rate suggests, because the next departure may not be the same day.
The Seattle to San Luis Obispo route sits close to the middle of the record — neither notably punctual nor notably late.
Which airline should you fly on this route?
Over January 2025 – August 2026, Alaska Airlines arrived on time most often on SEA to SBP. Flights ran closest to schedule in April and worst in January.
Every airline on SEA to SBP
Ranked by how many flights each one operated. A carrier with fewer than 100 flights in the period is listed but not graded.
| Airline | Flights | On time | Cancelled | Avg delay | Grade |
|---|---|---|---|---|---|
| Alaska Airlines | 223 | 80% | 0.9% | 51 min | C |
| SkyWest Airlines | 28 | 85.71% | 0% | 38 min | — |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
SBP to SEA San Luis Obispo back to Seattle 79.03% on time COther routes from Seattle
Common questions
Are flights from Seattle to San Luis Obispo usually delayed?
80.65% of flights on the SEA to SBP route arrived within 15 minutes of schedule, so roughly 2 in every ten arrived late. That is better than the average route in this record.
Which airlines fly from Seattle to San Luis Obispo?
Only Alaska Airlines appears in the published record on this route, with 223 flights and 80% arriving on time.
How often are SEA to SBP flights cancelled?
0.8% of scheduled flights did not operate — about 8 in every thousand. That is in the normal range.
What is the best month to fly Seattle to San Luis Obispo?
April, when 100% of flights arrived on time. The worst was December at 70%.
When SEA to SBP flights are late, how late are they?
About 50 minutes on average across the flights that arrived more than 15 minutes behind schedule.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on SEA to SBP during January 2025 – August 2026, as reported by the airlines to the US Bureau of Transportation Statistics. "On time" is the federal definition: arriving at the gate within 15 minutes of the scheduled time.
A route's record is a description of the past, not a forecast. Weather, air traffic control and the aircraft's earlier flights that day drive most delays, and none of them are predictable from a historical rate. What the record does tell you is whether this route runs late more often than others, and which carrier on it has the better history — which is the part you can actually act on when you book.
Cancellations are counted separately from delays because they are a different problem for a traveller: a late flight still gets you there. How the grade is calculated →