PlainFlights

Route · SEA → KTN · 2020–2025 BTS data

Seattle to Ketchikan

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), SEA to KTN (Seattle to Ketchikan) ranks #1638 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

79.9%
On-time
+0.9 pts
vs US avg
55 min
Delay when late
7,680
Flights
#1638 of 4927
Corpus placement

Cancelled

0.4%

Best Month

Feb 2024 94%

Worst Month

Dec 2025 59%

Distance

680 mi

Carriers

3

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 91 37 1 3 AS
Nov 2025 87 16 0 1 AS
Oct 2025 96 19 0 2 AS
Sep 2025 120 18 0 2 AS
Aug 2025 143 36 0 1 AS
Jul 2025 155 53 1 0 AS
Jun 2025 139 48 0 0 AS
May 2025 110 43 1 0 AS
Apr 2025 90 25 0 0 AS
Mar 2025 93 22 0 0 AS
Feb 2025 84 13 0 1 AS
Jan 2025 91 27 0 4 AS
Dec 2024 91 21 0 2 AS
Nov 2024 88 15 0 0 AS
Oct 2024 93 13 0 2 AS
Sep 2024 122 27 0 0 OO,AS
Aug 2024 182 40 1 3 AS,OO
Jul 2024 185 44 1 0 AS,OO
Jun 2024 162 35 0 2 AS,OO
May 2024 124 34 0 0 AS
Apr 2024 105 15 0 1 AS
Mar 2024 93 17 1 0 AS
Feb 2024 87 5 0 0 AS
Jan 2024 91 25 5 0 AS

SEA–KTN seasonal on-time pattern

Best: September (84.8%) · weakest: December (71.1%)

70%75%80%85%90% JanFebMarAprMayJunJulAugSepOctNovDec 71.1%

Strongest calendar month

September

84.8% on-time · ~122 flights/mo

Busiest calendar month

July

~165 flights/mo avg

Weakest calendar month

December

71.1% on-time · ~86 flights/mo

Cancellation Rate

0.4%

11 of 2,722 flights

Diversion Rate

0.9%

24 of 2,722 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

KTN - Ketchikan

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

KTN on-time profile

Compare the two airports

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

Compare SEA vs KTN

Origin-hub reliability standing

Mid-pack among SEA departures

From SEA, this corridor sits with 63 other 75–85% on-time routes out of 89 tracked departures, not the hub's reliability leaders (25 at ≥85%) and not the softest ( 1 below 75%). Destination: Ketchikan · fleet on-time rank #3206 of 4927.

What the Data Says About SEA to KTN

7,680 tracked flights put the SEA to KTN pairing (Seattle to Ketchikan) at a 79.9% on-time rate, squarely in line with the wider network. Delays that do occur run 54.6 minutes on average. Across the 680-mile route and its 3 carriers, the trailing 24 months show 0.4% cancelled and 0.9% diverted (2,722 flights sampled).

The monthly split is wide on this route: Feb 2024 posted the strongest performance at 94% on-time, while Dec 2025 came in at just 59% - a 35-point swing worth factoring into travel timing.

On the multi-year calendar, SEA–KTN peaks in September at 84.8% on-time while July carries the heaviest traffic (~165 flights per month) ; the softest month is December at 71.1%, a 13.7-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does SEA to KTN rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, SEA to KTN ranks #1638 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 KTN? ▼
Flights from Seattle to Ketchikan have a 79.9% on-time rate based on 7,680 flights. The average delay is 54.6 minutes. The best recent month was Feb 2024 with 94% on-time.
What is the cancellation rate for SEA to KTN? ▼
Over the last 24 months, 0.4% of flights on this route were cancelled (11 of 2,722 flights) and 0.9% were diverted.
How far is the flight from SEA to KTN? ▼
The flight distance from Seattle (SEA) to Ketchikan (KTN) is approximately 680 miles. This route is served by 3 carriers.
When is the best time to fly from SEA to KTN? ▼
The best recent month for on-time performance was Feb 2024 (94% on-time). The worst was Dec 2025 (59% on-time). Consider booking during months with historically better performance.

Airports on this route

SEA Airport

Seattle
KTN Airport

Ketchikan
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–KTN data

SEA–KTN is mid-pack at 79.9% on-time; month and carrier mix move more than the corridor headline.

  • Compare SEA and KTN airport profiles: delay causes and top routes differ even on the same corridor. SEA airport
  • If your dates flex, September (84.8% on-time) beats December (71.1%) on this corridor. Seasonal chart
  • 4 other routes post a similar 79.9% 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.