6,317 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 62%.

Best time to leave 7–8 am 90% arrive on time from DEN

Best single flight UA 2271 DEN 08:01 → SEA 10:00 · 91% on time Avoid AS 535 DEN 16:36 → SEA 18:38 · 67% 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).

DEN

% 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.


United	1,906	82%	0.5%	58 min
Frontier	431	80%	1.4%	56 min
Delta (incl. SkyWest)	1,088	79%	0.8%	85 min
Alaska	1,551	76%	0.8%	58 min
Southwest	1,341	62%	0.2%	47 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.


UA 2271	DEN 08:01	SEA 10:00	91%
DL 1731	DEN 06:30	SEA 08:31	91%
AS 643	DEN 06:02	SEA 08:05	89%
UA 1424	DEN 11:22	SEA 13:22	86%
AS 682	DEN 12:20	SEA 14:23	83%
· · ·
UA 2013	DEN 15:58	SEA 17:59	80%
UA 2651	DEN 21:10	SEA 23:10	72%
AS 535	DEN 16:36	SEA 18:38	67%

All 28 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.


UA 1482	DEN 06:00	SEA 08:00	3h 00m	72	92%	0.0%	88 min
AS 643	DEN 06:02	SEA 08:05	3h 03m	295	89%	0.0%	72 min
DL 1731	DEN 06:30	SEA 08:31	3h 01m	364	91%	1.4%	95 min
WN 1713	DEN 07:45	SEA 09:45	3h 00m	50	84%	0.0%	37 min
F9 4545	DEN 07:45	SEA 09:48	3h 04m	209	82%	1.0%	52 min
UA 2271	DEN 08:01	SEA 10:00	2h 59m	345	91%	0.9%	42 min
AS 317	DEN 08:40	SEA 10:42	3h 02m	52	84%	3.8%	40 min
AS 525	DEN 09:00	SEA 11:04	3h 04m	49	81%	4.1%	108 min
WN 3051	DEN 10:05	SEA 12:05	3h 00m	50	76%	0.0%	31 min
UA 1424	DEN 11:22	SEA 13:22	3h 00m	258	86%	0.8%	72 min
F9 1175	DEN 12:00	SEA 14:01	3h 04m	181	81%	2.2%	58 min
AS 682	DEN 12:20	SEA 14:23	3h 03m	232	83%	1.3%	49 min
WN 4130	DEN 12:30	SEA 14:25	2h 55m	49	37%	0.0%	36 min
AS 381	DEN 12:55	SEA 14:53	2h 58m	52	77%	0.0%	38 min
DL 1358	DEN 13:15	SEA 15:23	3h 08m	86	80%	0.0%	66 min
UA 2164	DEN 14:00	SEA 16:00	3h 00m	61	84%	0.0%	66 min
AS 1332	DEN 14:57	SEA 17:00	3h 03m	48	81%	2.1%	54 min
UA 2013	DEN 15:58	SEA 17:59	3h 01m	260	80%	0.8%	71 min
AS 535	DEN 16:36	SEA 18:38	3h 02m	216	67%	0.5%	72 min
AS 249	DEN 18:15	SEA 20:17	3h 02m	52	58%	0.0%	54 min
DL 2759	DEN 18:35	SEA 20:37	3h 02m	31	52%	0.0%	65 min
DL 2543	DEN 18:41	SEA 20:44	3h 03m	55	57%	1.8%	78 min
UA 360	DEN 19:10	SEA 21:10	3h 00m	124	69%	0.0%	52 min
AS 785	DEN 19:21	SEA 21:29	3h 08m	134	70%	0.7%	43 min
WN 1716	DEN 19:50	SEA 21:50	3h 00m	49	33%	0.0%	59 min
AS 493	DEN 21:08	SEA 23:10	3h 02m	14	57%	0.0%	104 min
WN 3856	DEN 21:10	SEA 23:10	2h 55m	57	28%	0.0%	63 min
UA 2651	DEN 21:10	SEA 23:10	3h 00m	225	72%	0.9%	57 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.


United	DEN	SEA	3h 00m	82%	0.5%	1,906	Flying now
Frontier	DEN	SEA	3h 04m	80%	1.4%	431	Flying now
Delta	DEN	SEA	3h 10m	79%	0.8%	1,088	Flying now
Alaska	DEN	SEA	3h 03m	76%	0.8%	1,551	Flying now
Southwest	DEN	SEA	3h 00m	62%	0.2%	1,341	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