Showing Delta only (incl. its regional partners)All airlines ×

1,089 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

No clear winner: Delta’s SEA → DEN flights land within a few points of 77% on time whatever the hour.

Best time to leave 8–9 am 87% arrive on time from SEA

Best single flight DL 2851 SEA 19:56 → DEN 23:46 · 78% 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.

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 2851	SEA 19:56	DEN 23:46	78%

All 4 Delta 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 1358	SEA 08:30	DEN 12:18	2h 48m	110	85%	0.0%	49 min
DL 2759	SEA 13:40	DEN 17:39	2h 59m	43	43%	2.3%	53 min
DL 2543	SEA 13:50	DEN 17:46	2h 56m	55	39%	1.8%	57 min
DL 2851	SEA 19:56	DEN 23:46	2h 50m	224	78%	1.8%	56 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	DEN	2h 52m	77%	0.8%	1,089	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