4,145 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 93% depart on time. After 4 pm it’s 78%.

Best time to leave 7–8 am 95% arrive on time from SEA

Best single flight AS 430 SEA 07:05 → SLC 10:15 · 95% on time Avoid AS 733 SEA 11:51 → SLC 15:04 · 69% 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).

SEA

% 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	2,227	87%	0.5%	59 min
Alaska (incl. SkyWest, Horizon)	1,828	81%	1.1%	44 min
Frontier	90	–	3.3%	55 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.


AS 430	SEA 07:05	SLC 10:15	95%
DL 1128	SEA 05:30	SLC 08:30	94%
DL 1016	SEA 09:30	SLC 12:38	90%
DL 1265	SEA 11:05	SLC 14:11	86%
DL 1120	SEA 13:30	SLC 16:40	83%
· · ·
DL 1165	SEA 17:59	SLC 21:09	81%
AS 3298flown by SkyWest	SEA 19:07	SLC 22:14	79%
AS 733	SEA 11:51	SLC 15:04	69%

All 18 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.


DL 1128	SEA 05:30	SLC 08:30	2h 00m	365	94%	0.5%	74 min
AS 430	SEA 07:05	SLC 10:15	2h 10m	220	95%	1.8%	34 min
DL 2858	SEA 07:15	SLC 10:23	2h 08m	86	96%	1.2%	145 min
AS 292	SEA 07:18	SLC 10:27	2h 09m	52	88%	0.0%	68 min
AS 360	SEA 08:48	SLC 11:55	2h 07m	52	88%	0.0%	41 min
DL 1016	SEA 09:30	SLC 12:38	2h 08m	363	90%	0.8%	55 min
DL 1265	SEA 11:05	SLC 14:11	2h 06m	344	86%	0.6%	56 min
AS 1477	SEA 11:32	SLC 14:48	2h 16m	28	89%	0.0%	27 min
AS 733	SEA 11:51	SLC 15:04	2h 13m	271	69%	0.7%	43 min
DL 1120	SEA 13:30	SLC 16:40	2h 10m	365	83%	0.3%	62 min
AS 368	SEA 14:45	SLC 17:48	2h 03m	38	66%	0.0%	55 min
AS 619	SEA 15:55	SLC 19:01	2h 06m	28	79%	0.0%	47 min
AS 373	SEA 16:47	SLC 19:50	2h 03m	51	80%	0.0%	42 min
DL 1165	SEA 17:59	SLC 21:09	2h 10m	302	81%	0.7%	59 min
AS 3298flown by SkyWest	SEA 19:07	SLC 22:14	2h 07m	294	79%	0.0%	47 min
AS 3134flown by SkyWest	SEA 19:50	SLC 22:57	2h 07m	28	79%	0.0%	28 min
DL 1239	SEA 19:50	SLC 22:55	2h 05m	253	82%	0.4%	54 min
AS 1459	SEA 20:33	SLC 23:36	2h 03m	18	44%	0.0%	69 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	SLC	2h 08m	87%	0.5%	2,227	Flying now
Alaska	SEA	SLC	2h 07m	81%	1.1%	1,828	Flying now
Frontier	SEA	SLC	2h 09m	74%	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