Route on-time record
KTN to SEA: most on-time flights and the best time to fly
Ketchikan (Ketchikan International Airport) to Seattle (Seattle–Tacoma International Airport). 1,302 nonstop flights in Jun 2025 to May 2026, 82% arrived within 15 minutes and 2.8% were cancelled. The most reliable flight number was Alaska 62 at 12:59 PM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
KTN → SEA
Ketchikan to Seattle: 1,302 nonstop flights a year
On time (12 months)
82%
Cancelled
2.8%
avg delay 14 min
Best time to leave
Noon to 3 PM
85% on time vs 78% 9 AM to noon
Most reliable airline
Alaska
80% chance on time
Fares open on our travel partner (Aviasales). Pick the flight number you chose here.
Most reliable nonstop flights
Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.
#1 · Alaska 62
12:59 PM → 3:56 PM1h 58m nonstop
Local times, typical schedule. Last flown 2026-05-31.
83%
chance on time
- On time (history)
- 86%
- Cancelled
- 3.0%
- Avg arrival delay
- 10 min
- Arrived on time 86% of the time (352 flights, Jun 2025 to May 2026).
- Cancelled 3.0% of the time (11 of 363).
- Leaves in this route's most on-time window (Noon to 3 PM: 85% on time; 9 AM to noon: 78%).
- 74% of its delay minutes came from the plane arriving late from an earlier flight.
Strong track record · 352 flights
Find Alaska 62 fares Opens this date on Aviasales#2 · Alaska 64
5:41 PM → 8:39 PM1h 58m nonstop
Local times, typical schedule. Last flown 2026-05-31.
81%
chance on time
- On time (history)
- 84%
- Cancelled
- 3.6%
- Avg arrival delay
- 11 min
- Arrived on time 84% of the time (347 flights, Jun 2025 to May 2026).
- Cancelled 3.6% of the time (13 of 360).
- Lands inside SEA's trouble window: 54% of its 68 ground stops and delay programs started between 4 PM and 10 PM.
- 74% of its delay minutes came from the plane arriving late from an earlier flight.
Strong track record · 347 flights
Find Alaska 64 fares Opens this date on Aviasales#3 · Alaska 60
9:13 AM → 12:16 PM2h 02m nonstop
Local times, typical schedule. Last flown 2026-05-31.
80%
chance on time
- On time (history)
- 83%
- Cancelled
- 2.5%
- Avg arrival delay
- 16 min
- Arrived on time 83% of the time (353 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (9 AM to noon: 78% on time; Noon to 3 PM: 85%).
- 55% of its delay minutes came from the plane arriving late from an earlier flight.
Strong track record · 353 flights
Find Alaska 60 fares Opens this date on Aviasales#4 · Alaska 565
2:00 PM → 5:00 PM2h 00m nonstop
Local times, typical schedule. Last flown 2026-05-31.
79%
chance on time
- On time (history)
- 88%
- Cancelled
- 0.0%
- Avg arrival delay
- 8 min
- Arrived on time 88% of the time (16 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Noon to 3 PM: 85% on time; 9 AM to noon: 78%).
- Lands inside SEA's trouble window: 54% of its 68 ground stops and delay programs started between 4 PM and 10 PM.
Limited track record · 16 flights
Find Alaska 565 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Alaska Airlines80%
1,302 flights · 82% on time as flown · 2.8% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM81%
59 flights · avg delay 26 min
- 9 AM to noon78%
417 flights · avg delay 16 min
- Noon to 3 PM85%
395 flights · avg delay 10 min
- 3 to 6 PM82%
431 flights · avg delay 13 min
On time by month
All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.
What delays this route
- Late-arriving aircraft70%
- Airline (crew, maintenance, boarding)18%
- Air traffic control and airport volume8%
- Security2%
- Severe weather2%
Share of delay minutes by the cause airlines report to the US DOT.
Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure
KTN to SEA questions
- What time of day is best to fly KTN to SEA?
- Noon to 3 PM: 85% of flights arrived on time, against 78% for departures 9 AM to noon.
- Which airline is most on time from KTN to SEA?
- Alaska, with a season-adjusted 80% chance of operating and arriving on time over 1,302 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
- What is the worst month for delays on KTN to SEA?
- August (75% on time); the best was April (94%), averaged over Jun 2023 to May 2026.
- Is this a prediction for my flight?
- No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.
More routes from KTN
Live status: FAA delays and ground stops