Route on-time record
SEA to KTN: most on-time flights and the best time to fly
Seattle (Seattle–Tacoma International Airport) to Ketchikan (Ketchikan International Airport). 1,301 nonstop flights in Jun 2025 to May 2026, 75% arrived within 15 minutes and 0.2% were cancelled. The most reliable flight number was Alaska 65 at 7:00 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
SEA → KTN
Seattle to Ketchikan: 1,301 nonstop flights a year
On time (12 months)
75%
Cancelled
0.2%
avg delay 15 min
Best time to leave
Before 9 AM
83% on time vs 65% noon to 3 PM
Most reliable airline
Alaska
75% 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 65
7:00 AM → 8:11 AM2h 11m nonstop
Local times, typical schedule. Last flown 2026-05-31.
82%
chance on time
- On time (history)
- 83%
- Cancelled
- 0.0%
- Avg arrival delay
- 10 min
- Arrived on time 83% of the time (354 flights, Jun 2025 to May 2026).
- Never cancelled in 360 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 83% on time; Noon to 3 PM: 65%).
- Departs outside SEA's trouble window (4 PM to 10 PM, when 54% of its 68 ground stops and delay programs started).
Strong track record · 354 flights
Find Alaska 65 fares Opens this date on Aviasales#2 · Alaska 69
6:23 PM → 7:35 PM2h 11m nonstop
Local times, typical schedule. Last flown 2026-05-31.
81%
chance on time
- On time (history)
- 81%
- Cancelled
- 0.0%
- Avg arrival delay
- 13 min
- Arrived on time 81% of the time (357 flights, Jun 2025 to May 2026).
- Never cancelled in 362 scheduled flights.
- Departs inside SEA's trouble window: 54% of its 68 ground stops and delay programs started between 4 PM and 10 PM.
Strong track record · 357 flights
Find Alaska 69 fares Opens this date on Aviasales#3 · Alaska 565
11:47 AM → 1:06 PM2h 19m nonstop
Local times, typical schedule. Last flown 2026-05-31.
72%
chance on time
- On time (history)
- 81%
- Cancelled
- 0.0%
- Avg arrival delay
- 11 min
- Arrived on time 81% of the time (16 flights, Jun 2025 to May 2026).
- Departs outside SEA's trouble window (4 PM to 10 PM, when 54% of its 68 ground stops and delay programs started).
Limited track record · 16 flights
Find Alaska 565 fares Opens this date on Aviasales#4 · Alaska 67
3:31 PM → 4:39 PM2h 09m nonstop
Local times, typical schedule. Last flown 2026-05-31.
68%
chance on time
- On time (history)
- 68%
- Cancelled
- 0.5%
- Avg arrival delay
- 20 min
- Arrived on time 68% of the time (351 flights, Jun 2025 to May 2026).
- Departs outside SEA's trouble window (4 PM to 10 PM, when 54% of its 68 ground stops and delay programs started).
Strong track record · 351 flights
Find Alaska 67 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Alaska Airlines75%
1,301 flights · 75% on time as flown · 0.2% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM83%
361 flights · avg delay 10 min
- 9 AM to noon66%
145 flights · avg delay 18 min
- Noon to 3 PM65%
69 flights · avg delay 20 min
- 3 to 6 PM68%
364 flights · avg delay 20 min
- 6 to 9 PM81%
362 flights · avg delay 13 min
Best day: Saturday (81%). Worst: Friday (75%).
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
- Airline (crew, maintenance, boarding)59%
- Late-arriving aircraft23%
- Air traffic control and airport volume15%
- Severe weather3%
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
SEA to KTN questions
- What time of day is best to fly SEA to KTN?
- Before 9 AM: 83% of flights arrived on time, against 65% for departures noon to 3 PM. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
- Which airline is most on time from SEA to KTN?
- Alaska, with a season-adjusted 75% chance of operating and arriving on time over 1,301 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 SEA to KTN?
- December (71% on time); the best was February (87%), 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 SEA
- KTN to SEA (return)
- SEA to LAX 83%
- SEA to PHX 79%
- SEA to SFO 69%
- SEA to ANC 74%
- SEA to DEN 77%
- SEA to LAS 77%
- SEA to ORD 75%
- SEA to GEG 81%
- SEA to DFW 77%
- SEA to PDX 82%
- SEA to SAN 78%
- SEA to SMF 81%
Live status: FAA delays and ground stops