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Showing Delta only (incl. its regional partners)All airlines ×
715 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

No clear winner: Delta’s SEA → DFW flights land within a few points of 3 in 4 on time whatever the hour.

Best time to leave 9–10 am 79% arrive on time from SEA
Best single flight DL 803 SEA 09:15 → DFW 15:17 · 81% on time Avoid DL 870 SEA 17:55 → DFW 23:59 · 73% 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).

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SEA
80
72
% 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 803 SEA 09:15 DFW 15:17 81%
DL 870 SEA 17:55 DFW 23:59 73%

All 2 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 803 SEA 09:15 DFW 15:17 4h 02m 224 81% 1.3% 79 min
DL 870 SEA 17:55 DFW 23:59 4h 04m 354 73% 2.3% 83 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 DFW 4h 02m 76% 1.7% 715 Flying now

Alternatives with one stop

All connections →
DeltaDetails → SEA 05:30 → SLC 08:30DL 1128 1h 20m Salt Lake City SLC 09:50 → DFW 13:33DL 2800 6h 03m 97% 81%
DeltaDetails → SEA 13:30 → SLC 16:40DL 1120 1h 00m Salt Lake City SLC 17:40 → DFW 21:24DL 2796 5h 54m 83% 63%
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