Route on-time record
SEA to AUS: most on-time flights and the best time to fly
Seattle (Seattle–Tacoma International Airport) to Austin (Austin Bergstrom International Airport). 2,055 nonstop flights in Jun 2025 to May 2026, 78% arrived within 15 minutes and 0.9% were cancelled. The most reliable flight number was Delta 739 at 7:15 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
SEA → AUS
Seattle to Austin: 2,055 nonstop flights a year
On time (12 months)
78%
Cancelled
0.9%
avg delay 15 min
Best time to leave
Before 9 AM
89% on time vs 69% after 9 PM
Most reliable airline
Delta
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 · Delta 739
7:15 AM → 1:30 PM4h 10m nonstop
Local times, typical schedule. Last flown 2026-05-31.
87%
chance on time
- On time (history)
- 87%
- Cancelled
- 1.1%
- Avg arrival delay
- 11 min
- Arrived on time 87% of the time (277 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 89% on time; After 9 PM: 69%).
- Departs outside SEA's trouble window (4 PM to 10 PM, when 54% of its 68 ground stops and delay programs started).
- Lands inside AUS's trouble window: 79% of its 91 ground stops and delay programs started between 10 AM and 4 PM.
Strong track record · 277 flights
Find Delta 739 fares Opens this date on Aviasales#2 · Alaska 461
6:24 PM → 12:34 AM4h 10m nonstop
Local times, typical schedule. Last flown 2026-05-31.
81%
chance on time
- On time (history)
- 84%
- Cancelled
- 0.0%
- Avg arrival delay
- 5 min
- Arrived on time 84% of the time (64 flights, Jun 2025 to May 2026).
- Never cancelled in 64 scheduled flights.
- Departs inside SEA's trouble window: 54% of its 68 ground stops and delay programs started between 4 PM and 10 PM.
Moderate track record · 64 flights
Find Alaska 461 fares Opens this date on Aviasales#3 · Delta 831
10:55 AM → 5:11 PM4h 13m nonstop
Local times, typical schedule. Last flown 2026-05-31.
79%
chance on time
- On time (history)
- 80%
- Cancelled
- 1.4%
- Avg arrival delay
- 16 min
- Arrived on time 80% of the time (347 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 · 347 flights
Find Delta 831 fares Opens this date on Aviasales#4 · Alaska 502
8:20 AM → 2:32 PM4h 13m nonstop
Local times, typical schedule. Last flown 2026-05-31.
79%
chance on time
- On time (history)
- 80%
- Cancelled
- 1.6%
- Avg arrival delay
- 10 min
- Arrived on time 80% of the time (358 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 89% on time; After 9 PM: 69%).
- Departs outside SEA's trouble window (4 PM to 10 PM, when 54% of its 68 ground stops and delay programs started).
- Lands inside AUS's trouble window: 79% of its 91 ground stops and delay programs started between 10 AM and 4 PM.
Strong track record · 358 flights
Find Alaska 502 fares Opens this date on Aviasales#5 · Alaska 352
8:13 AM → 6:04 PM4h 19m nonstop
Local times, typical schedule. Last flown 2026-05-31.
78%
chance on time
- On time (history)
- 78%
- Cancelled
- 0.3%
- Avg arrival delay
- 14 min
- Arrived on time 78% of the time (337 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 89% on time; After 9 PM: 69%).
- 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 · 337 flights
Find Alaska 352 fares Opens this date on Aviasales#6 · Delta 848
5:45 PM → 11:53 PM4h 08m nonstop
Local times, typical schedule. Last flown 2026-05-31.
74%
chance on time
- On time (history)
- 75%
- Cancelled
- 0.7%
- Avg arrival delay
- 21 min
- Arrived on time 75% of the time (290 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.
Strong track record · 290 flights
Find Delta 848 fares Opens this date on Aviasales#7 · Alaska 372
6:09 PM → 12:24 AM4h 15m nonstop
Local times, typical schedule. Last flown 2026-05-12.
72%
chance on time
- On time (history)
- 70%
- Cancelled
- 0.4%
- Avg arrival delay
- 16 min
- Arrived on time 70% of the time (250 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.
Strong track record · 250 flights
Find Alaska 372 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Delta Air Lines80%
930 flights · 81% on time as flown · 1.1% cancel
- Alaska Airlines76%
1,125 flights · 76% on time as flown · 0.7% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM89%
398 flights · avg delay 10 min
- 9 AM to noon79%
751 flights · avg delay 14 min
- Noon to 3 PM71%
207 flights · avg delay 17 min
- 3 to 6 PM72%
515 flights · avg delay 20 min
- 6 to 9 PM87%
75 flights · avg delay 5 min
- After 9 PM69%
109 flights · avg delay 18 min
Best day: Tuesday (85%). Worst: Monday (73%).
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)48%
- Late-arriving aircraft26%
- Air traffic control and airport volume23%
- 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
SEA to AUS questions
- What time of day is best to fly SEA to AUS?
- Before 9 AM: 89% of flights arrived on time, against 69% for departures after 9 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 AUS?
- Delta, with a season-adjusted 80% chance of operating and arriving on time over 930 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 AUS?
- June (68% 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
- AUS 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