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4,146 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 94% depart on time. After 4 pm it’s 78%.

Best time to leave 6–7 am 94% arrive on time from SLC
Best single flight DL 2874 SLC 07:50 → SEA 09:05 · 93% on time Avoid AS 719 SLC 20:46 → SEA 22:12 · 65% 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).

6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
SLC
93
94
90
87
90
80
85
87
78
71
80
76
79
73
77
89
% 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
Seattle flights leaving SLC 5–6 pm: 1Close ×
DL 871 SLC 17:20 SEA 18:36 2h 16m 332 82% 0.6% 59 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 2,230 84% 0.5% 55 min
Alaska (incl. SkyWest, Horizon) 1,826 78% 1.2% 55 min
Frontier 90 – 3.3% 62 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 2874 SLC 07:50 SEA 09:05 93%
DL 2998 SLC 22:45 SEA 23:59 91%
DL 2995 SLC 11:35 SEA 12:52 89%
AS 796 SLC 11:17 SEA 12:30 87%
DL 2921 SLC 13:20 SEA 14:40 85%
· · ·
DL 2817 SLC 15:14 SEA 16:30 77%
AS 734 SLC 16:00 SEA 17:16 67%
AS 719 SLC 20:46 SEA 22:12 65%
All 18 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 SLC SEA 2h 17m 84% 0.5% 2,230 Flying now
Alaska SLC SEA 2h 19m 78% 1.2% 1,826 Flying now
Frontier SLC SEA 2h 21m 69% 3.3% 90 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