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Route · SEA → SIT · 2020–2025 BTS data

Seattle to Sitka

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), SEA to SIT (Seattle to Sitka) ranks #4052 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

74.4%
On-time
-4.6 pts
vs US avg
58 min
Delay when late
1,647
Flights
#4052 of 4927
Corpus placement

Cancelled

0.8%

Best Month

Aug 2020 92%

Worst Month

Jul 2025 53%

Distance

861 mi

Carriers

3

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Sep 2025 30 6 0 0 AS
Aug 2025 49 20 0 0 AS
Jul 2025 62 29 1 1 AS
Jun 2025 60 28 0 0 AS
May 2025 35 10 0 0 AS
Sep 2024 37 12 0 0 OO,AS
Aug 2024 80 33 2 3 AS,OO
Jul 2024 93 27 1 0 AS,OO
Jun 2024 84 38 1 2 AS,OO
May 2024 32 16 0 0 AS
Sep 2023 39 7 0 0 AS,OO
Aug 2023 93 25 0 1 AS,OO
Jul 2023 93 24 0 2 AS,OO
Jun 2023 73 19 0 0 AS,OO
Sep 2022 39 4 0 0 OO,AS
Aug 2022 93 20 1 2 AS,OO
Jul 2022 93 26 4 2 OO,AS
Jun 2022 85 18 3 0 OO,AS
Sep 2021 41 8 0 0 OO,AS
Aug 2021 78 17 0 0 OO,AS
Jul 2021 92 9 0 0 OO,AS
Jun 2021 60 12 0 1 OO,AS
Sep 2020 30 2 0 0 AS
Aug 2020 61 5 0 1 AS,OO

Cancellation Rate

0.8%

13 of 1,532 flights

Diversion Rate

1.0%

15 of 1,532 flights

Explore origin & destination

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

SEA - Seattle

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

SEA on-time profile

SIT - Sitka

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

SIT on-time profile

Compare the two airports

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

Compare SEA vs SIT

Origin-hub reliability standing

Softer reliability from SEA

Among 89 routes leaving SEA, only 1 (including this one) clear below 75% on-time, while 25 stay ≥85% and 63 sit mid-band. Travelers comparing SEA options should weigh this 74.4% print against those peers · fleet on-time rank #4562 of 4927.

What the Data Says About SEA to SIT

On-time performance on the SEA to SIT pairing (Seattle to Sitka) trails a chunk of the network: 74.4% of 1,647 tracked flights arrived on schedule, with a 57.8-minute average delay on the ones that ran late. The route spans about 861 miles across 3 carriers. Cancellations over the trailing 24 months hit 0.8% (13 of 1,532 flights), with 1.0% diverted.

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 53% - a 39-point swing worth factoring into travel timing.

On the multi-year calendar, SEA–SIT peaks in September at 81.9% on-time while July carries the heaviest traffic (~83 flights per month) ; the softest month is May at 61.2%, a 20.7-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does SEA to SIT rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, SEA to SIT ranks #4052 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 SEA to SIT? ▼
Flights from Seattle to Sitka have a 74.4% on-time rate based on 1,647 flights. The average delay is 57.8 minutes. The best recent month was Aug 2020 with 92% on-time.
What is the cancellation rate for SEA to SIT? ▼
Over the last 24 months, 0.8% of flights on this route were cancelled (13 of 1,532 flights) and 1.0% were diverted.
How far is the flight from SEA to SIT? ▼
The flight distance from Seattle (SEA) to Sitka (SIT) is approximately 861 miles. This route is served by 3 carriers.
When is the best time to fly from SEA to SIT? ▼
The best recent month for on-time performance was Aug 2020 (92% on-time). The worst was Jul 2025 (53% on-time). Consider booking during months with historically better performance.

Airports on this route

SEA Airport

Seattle
SIT Airport

Sitka
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 SEA–SIT data

SEA–SIT sits 4.6 pts below the national 79% average; check the seasonal chart and airport profiles before treating the headline as typical.

  • Compare SEA and SIT airport profiles: delay causes and top routes differ even on the same corridor. SEA airport
  • If your dates flex, September (81.9% on-time) beats May (61.2%) on this corridor. Seasonal chart
  • 4 other routes post a similar 74.4% 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.