1,092 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 9 in 10 depart on time. After 4 pm it’s 77%.

Best time to leave 8–9 am 82% arrive on time from DCA

Best single flight AS 1 DCA 08:00 → SEA 10:58 · 82% on time Avoid AS 3 DCA 17:00 → SEA 19:59 · 75% 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).

DCA

% 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

Seattle flights leaving DCA 4–5 pm: 1Close ×


DL 786	DCA 16:36	SEA 19:30	5h 54m	126	66%	4.0%	100 min

Airlines on this route

Arriving within 15 minutes. Regional flights count under the airline that sells them. Pick an airline to see its flights.


Alaska	728	79%	0.8%	50 min
Delta	364	69%	2.7%	97 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.


AS 1	DCA 08:00	SEA 10:58	82%
AS 3	DCA 17:00	SEA 19:59	75%

All 3 flights on this route →

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.


Alaska	DCA	SEA	5h 59m	79%	0.8%	728	Flying now
Delta	DCA	SEA	5h 55m	69%	2.7%	364	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