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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
Las Vegas flights leaving SEA 7–8 am: 3Close ×
DL 2922 SEA 07:25 LAS 09:59 2h 34m 365 92% 1.1% 63 min
WN 2175 SEA 07:30 LAS 10:05 2h 35m 33 85% 0.0% 34 min
AS 612 SEA 07:48 LAS 10:29 2h 41m 235 88% 0.4% 51 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.
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