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Route · SBP → SEA · 2020–2025 BTS data

San Luis Obispo to Seattle

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), SBP to SEA (San Luis Obispo to Seattle) ranks #3799 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

85%
On-time
+6 pts
vs US avg
67 min
Delay when late
2,043
Flights
#3799 of 4927
Corpus placement

Cancelled

0.7%

Best Month

Jul 2024 87%

Worst Month

Aug 2024 75%

Distance

847 mi

Carriers

6

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 31 10 1 0 AS
Nov 2025 30 4 0 0 AS
Oct 2025 31 5 1 0 AS
Aug 2025 31 11 0 0 AS
Jul 2025 31 9 0 0 AS
Jun 2025 30 16 0 0 AS
May 2025 31 15 0 1 AS
Apr 2025 30 9 0 0 AS
Mar 2025 31 4 0 0 AS
Jan 2025 31 1 1 0 AS
Dec 2024 31 4 0 0 AS,OO
Nov 2024 30 3 1 0 OO,AS
Oct 2024 31 9 0 0 AS,OO
Sep 2024 55 8 1 0 OO
Aug 2024 61 15 0 1 OO
Jul 2024 62 8 0 0 OO
Jun 2024 36 3 0 0 OO
Apr 2024 39 6 1 1 OO
Dec 2023 31 7 0 0 OO
Nov 2023 30 6 0 0 OO
Oct 2023 31 8 0 0 OO
Sep 2023 30 4 0 0 OO
Aug 2023 31 8 0 0 OO
Jul 2023 31 3 0 0 OO

SBP–SEA seasonal on-time pattern

Best: January (89.5%) · weakest: December (79.6%)

75%80%85%90% JanMarAprMayJunJulAugSepOctNovDec 79.6%

Strongest calendar month

January

89.5% on-time · ~31 flights/mo

Busiest calendar month

July

~46 flights/mo avg

Weakest calendar month

December

79.6% on-time · ~31 flights/mo

Cancellation Rate

0.7%

6 of 836 flights

Diversion Rate

0.4%

3 of 836 flights

Explore origin & destination

On-time and delay data for the airports this route connects.

SBP - San Luis Obispo

Full on-time, delay-cause, and seasonal performance for San Luis Obispo, CA.

SBP on-time profile

SEA - Seattle

Full on-time, delay-cause, and seasonal performance for Seattle, WA.

SEA on-time profile

Compare the two airports

See SBP and SEA side by side on delays, cancellations, and reliability.

Compare SBP vs SEA

Origin-hub reliability standing

Among SBP's stronger departures

SBP → SEA posts a 85% on-time rate, landing in the ≥85% band with 3 of 7 BTS-tracked routes leaving San Luis Obispo. The same hub also shows 4 mid-band and 0 challenged departures · fleet-wide on-time rank #1233 of 4927 (highest on-time = #1).

What the Data Says About SBP to SEA

San Luis Obispo to Seattle (SBP to SEA) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 85% on-time rate across 2,043 flights, with delays that do happen averaging 66.9 minutes. The corridor runs roughly 847 miles and is served by 6 carriers. Over the most recent 24 months, 6 of 836 flights were cancelled (0.7%) and 3 diverted (0.4%).

Monthly performance varies moderately here: Jul 2024 was the strongest month at 87% on-time versus Aug 2024 at 75%, a 12-point difference.

On the multi-year calendar, SBP–SEA peaks in January at 89.5% on-time while July carries the heaviest traffic (~46 flights per month) ; the softest month is December at 79.6%, a 9.9-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does SBP to SEA rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, SBP to SEA ranks #3799 of 4927 tracked domestic routes by total flights (most flights = #1). That ordinal matches our busiest-routes listing (total_flights DESC). See /methodology#corpus-placement for the exact sort basis.
How often are flights delayed from SBP to SEA? ▼
Flights from San Luis Obispo to Seattle have a 85% on-time rate based on 2,043 flights. The average delay is 66.9 minutes. The best recent month was Jul 2024 with 87% on-time.
What is the cancellation rate for SBP to SEA? ▼
Over the last 24 months, 0.7% of flights on this route were cancelled (6 of 836 flights) and 0.4% were diverted.
How far is the flight from SBP to SEA? ▼
The flight distance from San Luis Obispo (SBP) to Seattle (SEA) is approximately 847 miles. This route is served by 6 carriers.
When is the best time to fly from SBP to SEA? ▼
The best recent month for on-time performance was Jul 2024 (87% on-time). The worst was Aug 2024 (75% on-time). Consider booking during months with historically better performance.

Airports on this route

SBP Airport

San Luis Obispo
SEA Airport

Seattle
Data source

Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.

Read our methodology - how this data is sourced, computed, and verified.

Using SBP–SEA data

SBP–SEA runs 6 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare SBP and SEA airport profiles: delay causes and top routes differ even on the same corridor. SBP airport
  • If your dates flex, January (89.5% on-time) beats December (79.6%) on this corridor. Seasonal chart
  • 4 other routes post a similar 85% on-time rate; compare before you commit to this pairing. Similar routes

On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.

Data sourced from U.S. Department of Transportation Bureau of Transportation Statistics (BTS) On-Time Performance data. See our methodology for details. Retrieved and formatted by PlainFlights

Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.