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4,562 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 73%.

Best time to leave 5–6 am 97% arrive on time from SEA
Best single flight DL 3881 SEA 08:47 → SMF 10:50 · 92% on time Avoid AS 681 SEA 14:16 → SMF 16:11 · 84% 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
95
95
90
94
88
84
59
80
80
82
82
75
81
61
75
76
70
% 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 (incl. SkyWest) 1,634 90% 0.2% 61 min
Alaska (incl. SkyWest, Horizon) 1,788 81% 0.8% 49 min
Southwest 1,140 74% 0.4% 49 min

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 3881flown by SkyWest SEA 08:47 SMF 10:50 92%
DL 4125flown by SkyWest SEA 10:10 SMF 12:18 91%
DL 4131flown by SkyWest SEA 20:25 SMF 22:28 91%
DL 4043flown by SkyWest SEA 17:00 SMF 19:01 89%
AS 681 SEA 14:16 SMF 16:11 84%

All 21 flights in the current schedule

Every flight that flew in the Jun 6 – Jul 31, 2026 schedule, with its record over Aug 2025 – Jul 2026. Times are local. Click a column to sort.
WN 3629 SEA 05:00 SMF 06:50 1h 50m 57 98% 0.0% 17 min
AS 682 SEA 07:28 SMF 09:26 1h 58m 52 94% 0.0% 42 min
AS 3272flown by SkyWest SEA 07:33 SMF 09:34 2h 01m 16 88% 0.0% 24 min
WN 3630 SEA 07:35 SMF 09:35 2h 00m 34 91% 0.0% 22 min
DL 3881flown by SkyWest SEA 08:47 SMF 10:50 2h 03m 357 92% 0.0% 81 min
AS 1540 SEA 09:54 SMF 11:50 1h 56m 49 92% 0.0% 32 min
AS 1380 SEA 10:01 SMF 12:01 2h 00m 52 65% 0.0% 38 min
DL 4125flown by SkyWest SEA 10:10 SMF 12:18 2h 08m 349 91% 0.0% 61 min
AS 1428 SEA 11:55 SMF 13:57 2h 02m 52 71% 0.0% 37 min
WN 1876 SEA 13:30 SMF 15:35 2h 05m 16 56% 0.0% 47 min
AS 681 SEA 14:16 SMF 16:11 1h 55m 252 84% 0.8% 47 min
AS 2401flown by Horizon SEA 14:44 SMF 16:37 1h 53m 15 53% 0.0% 48 min
DL 4153flown by SkyWest SEA 14:45 SMF 16:47 2h 02m 110 88% 0.0% 51 min
AS 614 SEA 16:20 SMF 18:14 1h 54m 28 82% 0.0% 89 min
DL 4043flown by SkyWest SEA 17:00 SMF 19:01 2h 01m 314 89% 0.3% 52 min
WN 3566 SEA 18:05 SMF 20:05 2h 00m 33 61% 0.0% 62 min
AS 638 SEA 19:23 SMF 21:16 1h 53m 51 75% 0.0% 50 min
AS 542 SEA 19:52 SMF 21:45 1h 53m 49 78% 0.0% 42 min
DL 4131flown by SkyWest SEA 20:25 SMF 22:28 2h 03m 319 91% 0.3% 54 min
AS 1427 SEA 20:55 SMF 22:48 1h 53m 30 73% 0.0% 66 min
WN 636 SEA 21:40 SMF 23:35 1h 58m 42 52% 0.0% 74 min

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 SMF 2h 03m 90% 0.2% 1,634 Flying now
Alaska SEA SMF 1h 55m 81% 0.8% 1,788 Flying now
Southwest SEA SMF 1h 55m 74% 0.4% 1,140 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