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Route on-time record

SEA to JNU: most on-time flights and the best time to fly

Seattle (Seattle–Tacoma International Airport) to Juneau (Juneau International Airport). 1,582 nonstop flights in Jun 2025 to May 2026, 75% arrived within 15 minutes and 1.4% were cancelled. The most reliable flight number was Alaska 61 at 7:00 AM.

Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.

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SEA → JNU

Seattle to Juneau: 1,582 nonstop flights a year

On time (12 months)

75%

Cancelled

1.4%

avg delay 13 min

Best time to leave

Noon to 3 PM

87% on time vs 66% 6 to 9 PM

Most reliable airline

Alaska

74% chance on time

Check SEA to JNU fares

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. #1 · Alaska 61

    7:00 AM → 8:38 AM2h 38m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    82%

    chance on time

    On time (history)
    83%
    Cancelled
    0.3%
    Avg arrival delay
    11 min
    • Arrived on time 83% of the time (357 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 · 357 flights

    Find Alaska 61 fares Opens this date on Aviasales

  2. #2 · Alaska 95

    11:45 AM → 1:36 PM2h 43m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    82%

    chance on time

    On time (history)
    84%
    Cancelled
    0.5%
    Avg arrival delay
    10 min
    • Arrived on time 84% of the time (198 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).

    Moderate track record · 198 flights

    Find Alaska 95 fares Opens this date on Aviasales

  3. #3 · Alaska 341

    9:15 PM → 10:50 PM2h 35m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    75%

    chance on time

    On time (history)
    74%
    Cancelled
    0.0%
    Avg arrival delay
    16 min
    • Arrived on time 74% of the time (19 flights, Jun 2025 to May 2026).
    • Departs 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 341 fares Opens this date on Aviasales

  4. #4 · Alaska 316

    10:19 AM → 12:03 PM2h 44m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    74%

    chance on time

    On time (history)
    78%
    Cancelled
    0.0%
    Avg arrival delay
    7 min
    • Arrived on time 78% of the time (18 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).
    • Short track record (18 flights), so its score leans on the airline's record at this hour.

    Limited track record · 18 flights

    Find Alaska 316 fares Opens this date on Aviasales

  5. #5 · Alaska 231

    10:10 PM → 11:48 PM2h 38m nonstop

    Local times, typical schedule. Last flown 2026-05-12.

    69%

    chance on time

    On time (history)
    76%
    Cancelled
    0.0%
    Avg arrival delay
    14 min
    • Arrived on time 76% of the time (54 flights, Jun 2025 to May 2026).
    • Never cancelled in 55 scheduled flights.
    • Departs outside SEA's trouble window (4 PM to 10 PM, when 54% of its 68 ground stops and delay programs started).
    • 50% of its delay minutes came from the plane arriving late from an earlier flight.

    Limited track record · 54 flights

    Find Alaska 231 fares Opens this date on Aviasales

  6. #6 · Alaska 363

    7:50 PM → 9:25 PM2h 35m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    65%

    chance on time

    On time (history)
    79%
    Cancelled
    0.0%
    Avg arrival delay
    9 min
    • Arrived on time 79% of the time (19 flights, Jun 2025 to May 2026).
    • Leaves in this route's least on-time window (6 to 9 PM: 66% on time; Noon to 3 PM: 87%).
    • Departs 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 363 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • Alaska Airlines74%

    1,442 flights · 75% on time as flown · 1.5% cancel

On time by departure time

All airlines, scheduled local departure, Jun 2025 to May 2026.

  • Before 9 AM83%

    362 flights · avg delay 11 min

  • 9 AM to noon71%

    478 flights · avg delay 12 min

  • Noon to 3 PM87%

    126 flights · avg delay 13 min

  • 3 to 6 PM78%

    140 flights · avg delay 11 min

  • 6 to 9 PM66%

    222 flights · avg delay 18 min

  • After 9 PM70%

    254 flights · avg delay 16 min

Best day: Tuesday (83%). Worst: Thursday (70%).

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.

J
72
F
82
M
79
A
81
M
70
J
70
J
66
A
74
S
84
O
85
N
83
D
76

What delays this route

  • Airline (crew, maintenance, boarding)43%
  • Late-arriving aircraft34%
  • Air traffic control and airport volume18%
  • Severe weather5%

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

Finding the most reliable connections from SEA to JNU…

SEA to JNU questions

What time of day is best to fly SEA to JNU?
Noon to 3 PM: 87% of flights arrived on time, against 66% for departures 6 to 9 PM.
Which airline is most on time from SEA to JNU?
Alaska, with a season-adjusted 74% chance of operating and arriving on time over 1,442 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 JNU?
July (66% on time); the best was October (85%), 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

Live status: FAA delays and ground stops