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5,621 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 92% depart on time. After 4 pm it’s 72%.

Best time to leave 5–6 am 98% arrive on time from SEA
Best single flight DL 2922 SEA 07:25 → LAS 09:59 · 92% on time Avoid AS 730 SEA 17:40 → LAS 20:18 · 73% 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).

5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
SEA
96
91
94
88
89
83
74
73
75
71
71
71
64
74
80
73
72
% 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

Pick an hour to see this route’s flights leaving then.

Airlines on this route

Arriving within 15 minutes. Regional flights count under the airline that sells them. Pick an airline to see its flights.
Delta 1,742 84% 1.0% 57 min
Alaska (incl. SkyWest) 2,631 80% 0.8% 48 min
Southwest 976 71% 0.5% 49 min
Frontier 260 69% 1.2% 131 min
Spirit 12 – 0.0% 50 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 2922 SEA 07:25 LAS 09:59 92%
AS 704 SEA 20:15 LAS 22:55 89%
AS 612 SEA 07:48 LAS 10:29 88%
DL 2905 SEA 09:55 LAS 12:28 85%
AS 658 SEA 13:00 LAS 15:35 82%
· · ·
AS 600 SEA 15:18 LAS 17:53 77%
AS 478 SEA 18:21 LAS 21:00 75%
AS 730 SEA 17:40 LAS 20:18 73%
All 24 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.
Delta SEA LAS 2h 34m 84% 1.0% 1,742 Flying now
Alaska SEA LAS 2h 37m 80% 0.8% 2,631 Flying now
Southwest SEA LAS 2h 30m 71% 0.5% 976 Flying now
Frontier SEA LAS 2h 38m 69% 1.2% 260 Flying now
Spirit SEA LAS 2h 28m 67%few flights 0.0% 12 Not 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