Route on-time record
JNU to SEA: most on-time flights and the best time to fly
Juneau (Juneau International Airport) to Seattle (Seattle–Tacoma International Airport). 1,583 nonstop flights in Jun 2025 to May 2026, 79% arrived within 15 minutes and 2.0% were cancelled. The most reliable flight number was Alaska 433 at 5:00 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
JNU → SEA
Juneau to Seattle: 1,583 nonstop flights a year
On time (12 months)
79%
Cancelled
2.0%
avg delay 13 min
Best time to leave
After 9 PM
83% on time vs 76% noon to 3 PM
Most reliable airline
Alaska
77% 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 433
5:00 AM → 8:26 AM2h 26m nonstop
Local times, typical schedule. Last flown 2026-05-31.
84%
chance on time
- On time (history)
- 89%
- Cancelled
- 0.0%
- Avg arrival delay
- 3 min
- Arrived on time 89% of the time (18 flights, Jun 2025 to May 2026).
- Short track record (18 flights), so its score leans on the airline's record at this hour.
Limited track record · 18 flights
Find Alaska 433 fares Opens this date on Aviasales#2 · Alaska 1403
7:00 AM → 10:33 AM2h 33m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Alaska 311; its record covers all of them.
79%
chance on time
- On time (history)
- 85%
- Cancelled
- 0.0%
- Avg arrival delay
- 11 min
- Arrived on time 85% of the time (39 flights, Jun 2025 to May 2026).
- Never cancelled in 39 scheduled flights.
- Short track record (39 flights), so its score leans on the airline's record at this hour.
Limited track record · 39 flights
Find Alaska 1403 fares Opens this date on Aviasales#3 · Alaska 95
1:51 PM → 5:19 PM2h 28m nonstop
Local times, typical schedule. Last flown 2026-05-31.
78%
chance on time
- On time (history)
- 84%
- Cancelled
- 0.0%
- Avg arrival delay
- 6 min
- Arrived on time 84% of the time (19 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (Noon to 3 PM: 76% on time; After 9 PM: 83%).
- Lands inside SEA's trouble window: 54% of its 68 ground stops and delay programs started between 4 PM and 10 PM.
- Short track record (19 flights), so its score leans on the airline's record at this hour.
Limited track record · 19 flights
Find Alaska 95 fares Opens this date on Aviasales#4 · Alaska 66
6:09 PM → 9:33 PM2h 24m nonstop
Local times, typical schedule. Last flown 2026-05-31.
78%
chance on time
- On time (history)
- 79%
- Cancelled
- 1.7%
- Avg arrival delay
- 13 min
- Arrived on time 79% of the time (350 flights, Jun 2025 to May 2026).
- Lands inside SEA's trouble window: 54% of its 68 ground stops and delay programs started between 4 PM and 10 PM.
Strong track record · 350 flights
Find Alaska 66 fares Opens this date on Aviasales#5 · Alaska 316
2:32 PM → 5:59 PM2h 27m nonstop
Local times, typical schedule. Last flown 2026-05-31.
77%
chance on time
- On time (history)
- 85%
- Cancelled
- 0.0%
- Avg arrival delay
- 5 min
- Arrived on time 85% of the time (39 flights, Jun 2025 to May 2026).
- Never cancelled in 39 scheduled flights.
- Leaves in this route's least on-time window (Noon to 3 PM: 76% on time; After 9 PM: 83%).
- 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 · 39 flights
Find Alaska 316 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Alaska Airlines77%
1,443 flights · 78% on time as flown · 2.1% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM82%
645 flights · avg delay 14 min
- Noon to 3 PM76%
478 flights · avg delay 13 min
- 6 to 9 PM78%
341 flights · avg delay 13 min
- After 9 PM83%
98 flights · avg delay 9 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
- Airline (crew, maintenance, boarding)40%
- Late-arriving aircraft32%
- Air traffic control and airport volume20%
- Severe weather6%
- Security1%
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
JNU to SEA questions
- What time of day is best to fly JNU to SEA?
- After 9 PM: 83% of flights arrived on time, against 76% for departures noon to 3 PM.
- Which airline is most on time from JNU to SEA?
- Alaska, with a season-adjusted 77% chance of operating and arriving on time over 1,443 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 JNU to SEA?
- December (75% on time); the best was April (88%), 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 JNU
- SEA to JNU (return)
- JNU to ANC 83%
- JNU to SIT 84%
- JNU to PSG 78%
- JNU to KTN 83%
- JNU to YAK 85%
Live status: FAA delays and ground stops