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Route on-time record

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

Austin (Austin Bergstrom International Airport) to Seattle (Seattle–Tacoma International Airport). 2,055 nonstop flights in Jun 2025 to May 2026, 82% arrived within 15 minutes and 1.0% were cancelled. The most reliable flight number was Delta 1684 at 11:10 AM.

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

AUS → SEA

Austin to Seattle: 2,055 nonstop flights a year

On time (12 months)

82%

Cancelled

1.0%

avg delay 14 min

Best time to leave

9 AM to noon

90% on time vs 71% 6 to 9 PM

Most reliable airline

Delta

84% chance on time

Check AUS to SEA fares

Lowest nonstop fare seen in the next two months: $290 (Alaska 503 on 2026-10-22). 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 · Delta 1684

    11:10 AM → 1:50 PM4h 40m nonstop

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

    92%

    chance on time

    On time (history)
    98%
    Cancelled
    0.0%
    Avg arrival delay
    6 min
    • Arrived on time 98% of the time (48 flights, Jun 2025 to May 2026).
    • Never cancelled in 49 scheduled flights.
    • Leaves in this route's most on-time window (9 AM to noon: 90% on time; 6 to 9 PM: 71%).
    • Departs inside AUS's trouble window: 79% of its 91 ground stops and delay programs started between 10 AM and 4 PM.

    Limited track record · 48 flights

    Find Delta 1684 fares Opens this date on Aviasales

  2. #2 · Delta 780

    6:00 AM → 8:45 AM4h 40m nonstop

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

    90%

    chance on time

    On time (history)
    91%
    Cancelled
    0.9%
    Avg arrival delay
    16 min
    • Arrived on time 91% of the time (322 flights, Jun 2025 to May 2026).
    • Departs outside AUS's trouble window (10 AM to 4 PM, when 79% of its 91 ground stops and delay programs started).

    Strong track record · 322 flights

    Find Delta 780 fares Opens this date on Aviasales

  3. #3 · Alaska 463

    8:30 AM → 11:08 AM4h 38m nonstop

    Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Alaska 782; its record covers all of them.

    90%

    chance on time

    On time (history)
    95%
    Cancelled
    0.0%
    Avg arrival delay
    2 min
    • Arrived on time 95% of the time (64 flights, Jun 2025 to May 2026).
    • Never cancelled in 64 scheduled flights.
    • Departs outside AUS's trouble window (10 AM to 4 PM, when 79% of its 91 ground stops and delay programs started).

    Moderate track record · 64 flights

    Find Alaska 463 fares Opens this date on Aviasales

  4. #4 · Alaska 503

    3:37 PM → 6:19 PM4h 43m nonstop

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

    84%

    chance on time

    On time (history)
    85%
    Cancelled
    1.2%
    Avg arrival delay
    10 min
    • Arrived on time 85% of the time (329 flights, Jun 2025 to May 2026).
    • Departs inside AUS's trouble window: 79% of its 91 ground stops and delay programs started between 10 AM and 4 PM.
    • 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 · 329 flights

    Find Alaska 503 fares Opens this date on Aviasales

  5. #5 · Alaska 502

    3:47 PM → 6:26 PM4h 39m nonstop

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

    84%

    chance on time

    On time (history)
    89%
    Cancelled
    0.0%
    Avg arrival delay
    6 min
    • Arrived on time 89% of the time (19 flights, Jun 2025 to May 2026).
    • Departs inside AUS's trouble window: 79% of its 91 ground stops and delay programs started between 10 AM and 4 PM.
    • 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 502 fares Opens this date on Aviasales

  6. #6 · Delta 396

    11:47 AM → 2:27 PM4h 40m nonstop

    Local times, typical schedule. Last flown 2026-04-12.

    83%

    chance on time

    On time (history)
    80%
    Cancelled
    2.8%
    Avg arrival delay
    9 min
    • Arrived on time 80% of the time (35 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (9 AM to noon: 90% on time; 6 to 9 PM: 71%).
    • Departs inside AUS's trouble window: 79% of its 91 ground stops and delay programs started between 10 AM and 4 PM.
    • Short track record (35 flights), so its score leans on the airline's record at this hour.

    Limited track record · 35 flights

    Find Delta 396 fares Opens this date on Aviasales

  7. #7 · Alaska 595

    6:00 AM → 8:39 AM4h 39m nonstop

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

    82%

    chance on time

    On time (history)
    82%
    Cancelled
    1.4%
    Avg arrival delay
    10 min
    • Arrived on time 82% of the time (285 flights, Jun 2025 to May 2026).
    • Departs outside AUS's trouble window (10 AM to 4 PM, when 79% of its 91 ground stops and delay programs started).

    Strong track record · 285 flights

    Find Alaska 595 fares Opens this date on Aviasales

  8. #8 · Delta 831

    6:06 PM → 8:49 PM4h 43m nonstop

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

    74%

    chance on time

    On time (history)
    77%
    Cancelled
    2.0%
    Avg arrival delay
    21 min
    • Arrived on time 77% of the time (147 flights, Jun 2025 to May 2026).
    • Leaves in this route's least on-time window (6 to 9 PM: 71% on time; 9 AM to noon: 90%).
    • Departs outside AUS's trouble window (10 AM to 4 PM, when 79% of its 91 ground stops and delay programs started).
    • Lands inside SEA's trouble window: 54% of its 68 ground stops and delay programs started between 4 PM and 10 PM.

    Moderate track record · 147 flights

    Find Delta 831 fares Opens this date on Aviasales

  9. #9 · Alaska 352

    7:04 PM → 9:40 PM4h 36m nonstop

    Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Alaska 339; its record covers all of them.

    70%

    chance on time

    On time (history)
    70%
    Cancelled
    1.0%
    Avg arrival delay
    18 min
    • Arrived on time 70% of the time (300 flights, Jun 2025 to May 2026).
    • Leaves in this route's least on-time window (6 to 9 PM: 71% on time; 9 AM to noon: 90%).
    • Departs outside AUS's trouble window (10 AM to 4 PM, when 79% of its 91 ground stops and delay programs started).
    • 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 · 300 flights

    Find Alaska 352 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • Delta Air Lines84%

    929 flights · 85% on time as flown · 1.0% cancel

  • Alaska Airlines80%

    1,126 flights · 81% on time as flown · 1.0% cancel

On time by departure time

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

  • Before 9 AM87%

    689 flights · avg delay 12 min

  • 9 AM to noon90%

    194 flights · avg delay 9 min

  • Noon to 3 PM85%

    433 flights · avg delay 10 min

  • 3 to 6 PM84%

    200 flights · avg delay 13 min

  • 6 to 9 PM71%

    539 flights · avg delay 20 min

Best day: Wednesday (85%). Worst: Sunday (80%).

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
81
F
87
M
83
A
90
M
75
J
75
J
80
A
85
S
85
O
87
N
85
D
80

What delays this route

  • Airline (crew, maintenance, boarding)40%
  • Late-arriving aircraft38%
  • Air traffic control and airport volume16%
  • Severe weather5%
  • 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

AUS to SEA questions

What time of day is best to fly AUS to SEA?
9 AM to noon: 90% of flights arrived on time, against 71% for departures 6 to 9 PM.
Which airline is most on time from AUS to SEA?
Delta, with a season-adjusted 84% chance of operating and arriving on time over 929 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 AUS to SEA?
May (75% on time); the best was April (90%), 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 AUS

Live status: FAA delays and ground stops