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Route · SIT → SEA · 2020–2025 BTS data

Sitka to Seattle

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), SIT to SEA (Sitka to Seattle) ranks #4028 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

78.8%
On-time
-0.2 pts
vs US avg
75 min
Delay when late
1,678
Flights
#4028 of 4927
Corpus placement

Cancelled

1.1%

Best Month

Aug 2020 92%

Worst Month

Jul 2025 61%

Distance

861 mi

Carriers

3

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Sep 2025 30 10 0 0 AS
Aug 2025 50 28 0 0 AS
Jul 2025 62 24 1 0 AS
Jun 2025 60 23 1 0 AS
May 2025 34 7 0 0 AS
Sep 2024 38 11 0 0 OO,AS
Aug 2024 81 24 3 1 AS,OO
Jul 2024 93 20 1 0 AS,OO
Jun 2024 83 19 2 0 AS,OO
May 2024 31 4 0 0 AS
Sep 2023 40 9 0 0 AS,OO
Aug 2023 93 20 0 0 AS,OO
Jul 2023 93 15 0 0 AS,OO
Jun 2023 71 8 0 0 AS,OO
Sep 2022 41 9 0 0 OO,AS
Aug 2022 93 24 1 0 AS,OO
Jul 2022 93 23 4 1 OO,AS
Jun 2022 84 13 3 0 OO,AS
Sep 2021 42 10 0 0 OO,AS
Aug 2021 78 15 1 0 OO,AS
Jul 2021 92 13 0 0 OO,AS
Jun 2021 60 13 0 0 OO,AS
Sep 2020 30 3 0 0 AS
Aug 2020 92 7 0 0 AS,OO

Cancellation Rate

1.1%

17 of 1,564 flights

Diversion Rate

0.1%

2 of 1,564 flights

Explore origin & destination

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

SIT - Sitka

Full on-time, delay-cause, and seasonal performance for Sitka, AK.

SIT 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 SIT and SEA side by side on delays, cancellations, and reliability.

Compare SIT vs SEA

Origin-hub reliability standing

Mid-pack among SIT departures

From SIT, this corridor sits with 1 other 75–85% on-time routes out of 3 tracked departures, not the hub's reliability leaders (2 at ≥85%) and not the softest ( 0 below 75%). Destination: Seattle · fleet on-time rank #3591 of 4927.

What the Data Says About SIT to SEA

1,678 tracked flights put the SIT to SEA pairing (Sitka to Seattle) at a 78.8% on-time rate, squarely in line with the wider network. Delays that do occur run 75.4 minutes on average. Across the 861-mile route and its 3 carriers, the trailing 24 months show 1.1% cancelled and 0.1% diverted (1,564 flights sampled).

The monthly split is wide on this route: Aug 2020 posted the strongest performance at 92% on-time, while Jul 2025 came in at just 61% - a 31-point swing worth factoring into travel timing.

On the multi-year calendar, SIT–SEA peaks in May at 83.1% on-time while July carries the heaviest traffic (~83 flights per month) ; the softest month is August at 75.8%, a 7.3-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does SIT to SEA rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, SIT to SEA ranks #4028 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 SIT to SEA? ▼
Flights from Sitka to Seattle have a 78.8% on-time rate based on 1,678 flights. The average delay is 75.4 minutes. The best recent month was Aug 2020 with 92% on-time.
What is the cancellation rate for SIT to SEA? ▼
Over the last 24 months, 1.1% of flights on this route were cancelled (17 of 1,564 flights) and 0.1% were diverted.
How far is the flight from SIT to SEA? ▼
The flight distance from Sitka (SIT) to Seattle (SEA) is approximately 861 miles. This route is served by 3 carriers.
When is the best time to fly from SIT to SEA? ▼
The best recent month for on-time performance was Aug 2020 (92% on-time). The worst was Jul 2025 (61% on-time). Consider booking during months with historically better performance.

Airports on this route

SIT Airport

Sitka
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 SIT–SEA data

SIT–SEA is mid-pack at 78.8% on-time; month and carrier mix move more than the corridor headline.

  • Compare SIT and SEA airport profiles: delay causes and top routes differ even on the same corridor. SIT airport
  • If your dates flex, May (83.1% on-time) beats August (75.8%) on this corridor. Seasonal chart
  • 4 other routes post a similar 78.8% 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.