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

835 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 11 pm–12 am 89% arrive on time from SEA

Best single flight AS 737 SEA 09:13 → IAD 17:11 · 84% on time Avoid AS 367 SEA 22:43 → IAD 06:39 · 84% 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.


AS 737	SEA 09:13	IAD 17:11	84%
AS 367	SEA 22:43	IAD 06:39	84%

All 4 Alaska 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.


AS 737	SEA 09:13	IAD 17:11	4h 58m	206	84%	0.5%	43 min
AS 348	SEA 15:53	IAD 23:59	5h 06m	132	81%	0.8%	34 min
AS 406	SEA 16:01	IAD 23:59	4h 58m	138	81%	0.7%	37 min
AS 367	SEA 22:43	IAD 06:39	4h 56m	284	84%	0.0%	40 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.


Alaska	SEA	IAD	4h 58m	83%	0.4%	835	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