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2,068 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 9 in 10 depart on time. After 4 pm it’s 78%.

Best time to leave 8–9 am 95% arrive on time from SEA
Best single flight DL 739 SEA 07:15 → AUS 13:24 · 90% on time Avoid DL 848 SEA 17:50 → AUS 23:56 · 75% on time

Time of day × airport

Share of this route’s flights leaving within 15 minutes, by airport and scheduled departure hour, over Aug 2025 – Jul 2026. Blank: no flights then (or fewer than 40 in the year).

7
8
9
10
11
12
13
14
15
16
17
18
SEA
91
90
80
80
76
70
77
82
% of this route’s flights leaving within 15 min (small number: flights in the Jun 6 – Jul 31, 2026 schedule): 85+75–8465–7455–64under 55
Austin flights leaving SEA 5–6 pm: 1Close ×
DL 848 SEA 17:50 AUS 23:56 4h 06m 305 75% 0.7% 69 min

Airlines on this route

Arriving within 15 minutes. Regional flights count under the airline that sells them. Pick an airline to see its flights.
Alaska 1,066 82% 0.7% 47 min
Delta 944 81% 1.2% 69 min
Southwest 58 – 0.0% 56 min

Dimmed: fewer than 150 flights in the year, too few to rank.

Flights, best and worst

Flights in the Jun 6 – Jul 31, 2026 schedule that ran 150+ times in the year. Times are local. Pick a flight for its history.
DL 739 SEA 07:15 AUS 13:24 90%
AS 502 SEA 08:34 AUS 14:47 85%
AS 352 SEA 11:43 AUS 18:04 84%
DL 831 SEA 11:04 AUS 17:18 79%
AS 372 SEA 18:19 AUS 00:31 78%
· · ·
DL 848 SEA 17:50 AUS 23:56 75%
All 10 flights on this route →

Nonstops by airline and airport

Arriving within 15 minutes, Aug 2025 – Jul 2026. Pick a row to see that airline’s flights on that airport pair.
Alaska SEA AUS 4h 13m 82% 0.7% 1,066 Flying now
Delta SEA AUS 4h 09m 81% 1.2% 944 Flying now
Southwest SEA AUS 4h 10m 48% 0.0% 58 Flying now
Flying on a particular day? Pick a date above and the same ranking uses our forecast odds for each flight that day: Tomorrow.

About this data: US DOT on-time records, Aug 2025 – Jul 2026, all US airlines; regional flights count under the airline that sells them. Schedules (which flights and connections exist, and their times) are as of Jun 6 – Jul 31, 2026; seasonal flights outside that window aren’t ranked. Rebuilt monthly. JSON