Seattle (SEA) to Ketchikan (KTN): On-Time Performance
Data through May 2026
The calendar drives reliability on SEA–KTN. May 2026 flights landed on schedule 86% of the time, but December 2025 dropped to 56% — a gap of 30 points. Across the full period the route averages 75% on-time against a national 78%.
- On-time
- 75%
- arrived <15 min late
- Avg delay
- 14 min
- completed flights
- Cancelled
- 0.2%
- Flights/day
- 3.6
- last 12 months
- Duration
- 2h 9m
- scheduled
- Distance
- 680 mi
Best airline from SEA to KTN
2 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| SkyWest Airlinesmost reliable | 76% | 11 min | 1.1% | 94 |
| Alaska Airlines | 75% | 14 min | 0.2% | 2,598 |
Monthly on-time trend
Best time to fly from SEA to KTN
Aim for departures around 6 a.m. (82% on-time); avoid 11 a.m. departures (66%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 77% | 12 min |
| Tuesday | 74% | 13 min |
| Wednesdaybest | 77% | 14 min |
| Thursday | 73% | 14 min |
| Friday | 70% | 16 min |
| Saturdaybest | 77% | 13 min |
| Sunday | 75% | 13 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft23%
- Airline operations57%
- National airspace system18%
- Weather2%
Frequently asked questions
- How often are flights from SEA to KTN delayed?
- 25% of SEA–KTN flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 14 minutes.
- Which airline is most reliable from SEA to KTN?
- SkyWest Airlines has the best on-time record on this route at 76%, based on 94 flights. 2 airlines flew SEA–KTN frequently enough to compare in this period.
- What is the best time of day to fly from SEA to KTN?
- Departures around 6 a.m. have the best record (82% on-time), while departures around 11 a.m. have the worst (66%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from SEA to KTN?
- The scheduled SEA–KTN flight time averages 2h 9m over 680 miles. Actual arrival times vary — flights on this route land 15+ minutes late 25% of the time.
- How often are SEA to KTN flights cancelled?
- 0.2% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below the national rate of 1.6%.
- What is the worst month to fly from SEA to KTN?
- December 2025 was the roughest month in this dataset, with only 56% of arrivals on time. The best was May 2026 at 86%. If your dates are flexible, that 30-point gap is worth planning around.
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Based on 2,692 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.