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 7 in 10.

Best time to leave 6–7 am 92% arrive on time from IAD

Best single flight AS 351 IAD 06:00 → SEA 08:46 · 79% 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).

IAD

% 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 351	IAD 06:00	SEA 08:46	79%

All 5 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 351	IAD 06:00	SEA 08:46	5h 46m	275	79%	0.7%	51 min
AS 409	IAD 06:03	SEA 08:48	5h 45m	113	63%	1.8%	49 min
AS 375	IAD 09:00	SEA 11:45	5h 45m	134	90%	0.0%	33 min
AS 361	IAD 09:30	SEA 12:16	5h 46m	52	90%	1.9%	45 min
AS 737	IAD 18:14	SEA 21:09	5h 55m	129	58%	1.6%	55 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	IAD	SEA	5h 46m	76%	1.2%	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