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Route · KTN → SEA · 2020–2025 BTS data

Ketchikan to Seattle

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), KTN to SEA (Ketchikan to Seattle) ranks #1635 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

86%
On-time
+7 pts
vs US avg
72 min
Delay when late
7,683
Flights
#1635 of 4927
Corpus placement

Cancelled

2.1%

Best Month

Apr 2025 96%

Worst Month

Aug 2025 71%

Distance

680 mi

Carriers

3

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 91 24 5 0 AS
Nov 2025 88 10 5 0 AS
Oct 2025 96 6 1 0 AS
Sep 2025 120 18 2 0 AS
Aug 2025 143 42 1 0 AS
Jul 2025 155 39 2 0 AS
Jun 2025 139 27 1 0 AS
May 2025 110 18 2 0 AS
Apr 2025 90 4 2 0 AS
Mar 2025 93 7 0 0 AS
Feb 2025 84 7 3 0 AS
Jan 2025 91 7 9 0 AS
Dec 2024 91 13 0 0 AS
Nov 2024 88 7 1 0 AS
Oct 2024 93 9 3 0 AS
Sep 2024 122 13 2 0 OO,AS
Aug 2024 182 53 0 1 AS,OO
Jul 2024 185 28 1 0 AS,OO
Jun 2024 162 29 3 0 AS,OO
May 2024 124 11 2 0 AS
Apr 2024 105 5 1 0 AS
Mar 2024 93 6 3 0 AS
Feb 2024 87 9 1 0 AS
Jan 2024 91 12 7 0 AS

KTN–SEA seasonal on-time pattern

Best: April (92.1%) · weakest: August (81.0%)

80%85%90%95% JanFebMarAprMayJunJulAugSepOctNovDec 81.7%

Strongest calendar month

April

92.1% on-time · ~82 flights/mo

Busiest calendar month

July

~165 flights/mo avg

Weakest calendar month

August

81.0% on-time · ~163 flights/mo

Cancellation Rate

2.1%

57 of 2,723 flights

Diversion Rate

0.0%

1 of 2,723 flights

Explore origin & destination

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

KTN - Ketchikan

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

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

Compare KTN vs SEA

Origin-hub reliability standing

Among KTN's stronger departures

KTN → SEA posts a 86% on-time rate, landing in the ≥85% band with 2 of 4 BTS-tracked routes leaving Ketchikan. The same hub also shows 1 mid-band and 1 challenged departures · fleet-wide on-time rank #904 of 4927 (highest on-time = #1).

What the Data Says About KTN to SEA

Ketchikan to Seattle (KTN to SEA) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 86% on-time rate across 7,683 flights, with delays that do happen averaging 72.3 minutes. The corridor runs roughly 680 miles and is served by 3 carriers. Over the most recent 24 months, 57 of 2,723 flights were cancelled (2.1%) and 1 diverted (0.0%).

The monthly split is wide on this route: Apr 2025 posted the strongest performance at 96% on-time, while Aug 2025 came in at just 71% - a 25-point swing worth factoring into travel timing.

On the multi-year calendar, KTN–SEA peaks in April at 92.1% on-time while July carries the heaviest traffic (~165 flights per month) ; the softest month is August at 81.0%, a 11.1-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does KTN to SEA rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, KTN to SEA ranks #1635 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 KTN to SEA? ▼
Flights from Ketchikan to Seattle have a 86% on-time rate based on 7,683 flights. The average delay is 72.3 minutes. The best recent month was Apr 2025 with 96% on-time.
What is the cancellation rate for KTN to SEA? ▼
Over the last 24 months, 2.1% of flights on this route were cancelled (57 of 2,723 flights) and 0.0% were diverted.
How far is the flight from KTN to SEA? ▼
The flight distance from Ketchikan (KTN) to Seattle (SEA) is approximately 680 miles. This route is served by 3 carriers.
When is the best time to fly from KTN to SEA? ▼
The best recent month for on-time performance was Apr 2025 (96% on-time). The worst was Aug 2025 (71% on-time). Consider booking during months with historically better performance.

Airports on this route

KTN Airport

Ketchikan
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 KTN–SEA data

KTN–SEA runs 7 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare KTN and SEA airport profiles: delay causes and top routes differ even on the same corridor. KTN airport
  • If your dates flex, April (92.1% on-time) beats August (81.0%) on this corridor. Seasonal chart
  • 4 other routes post a similar 86% 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.