3,278 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 87% depart on time. After 4 pm it’s 3 in 4.

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

Best single flight AS 377 ATL 07:00 → SEA 09:26 · 86% on time Avoid DL 714 ATL 18:25 → SEA 20:49 · 67% 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).

ATL

% 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.

Airlines on this route

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


Delta	2,380	78%	0.5%	57 min
Alaska	898	75%	1.0%	56 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 377	ATL 07:00	SEA 09:26	86%
DL 774	ATL 09:52	SEA 12:20	84%
DL 629	ATL 12:35	SEA 14:55	82%
DL 444	ATL 07:40	SEA 10:00	82%
DL 481	ATL 14:32	SEA 16:49	80%
· · ·
DL 903	ATL 21:35	SEA 23:59	79%
DL 472	ATL 16:45	SEA 19:04	70%
DL 714	ATL 18:25	SEA 20:49	67%

All 14 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.


Delta	ATL	SEA	5h 24m	78%	0.5%	2,380	Flying now
Alaska	ATL	SEA	5h 31m	75%	1.0%	898	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