3,277 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

No clear winner: airlines and hours on this route all land within a few points of 84% on time.

Best time to leave 6–7 am 95% arrive on time from SEA

Best single flight DL 569 SEA 06:00 → ATL 13:49 · 95% on time Avoid DL 554 SEA 11:56 → ATL 19:54 · 78% 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.

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	85%	0.6%	87 min
Alaska	897	83%	0.6%	48 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.


DL 569	SEA 06:00	ATL 13:49	95%
DL 652	SEA 23:59	ATL 07:46	89%
AS 464	SEA 23:31	ATL 07:24	88%
DL 560	SEA 16:05	ATL 23:59	87%
DL 567	SEA 21:45	ATL 05:36	84%
· · ·
AS 492	SEA 15:59	ATL 23:59	81%
DL 542	SEA 13:35	ATL 21:40	80%
DL 554	SEA 11:56	ATL 19:54	78%

All 13 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 569	SEA 06:00	ATL 13:49	4h 49m	364	95%	0.3%	67 min
DL 562	SEA 07:20	ATL 15:13	4h 53m	365	83%	0.8%	149 min
DL 797	SEA 08:40	ATL 16:33	4h 53m	61	69%	1.6%	130 min
AS 334	SEA 09:05	ATL 16:57	4h 52m	346	82%	0.3%	44 min
DL 554	SEA 11:56	ATL 19:54	4h 58m	302	78%	0.0%	56 min
DL 542	SEA 13:35	ATL 21:40	5h 05m	350	80%	0.6%	83 min
AS 492	SEA 15:59	ATL 23:59	5h 00m	182	81%	0.5%	64 min
DL 560	SEA 16:05	ATL 23:59	4h 54m	348	87%	0.6%	80 min
AS 727	SEA 16:05	ATL 23:59	4h 54m	187	82%	1.1%	43 min
DL 567	SEA 21:45	ATL 05:36	4h 51m	190	84%	1.1%	85 min
DL 409	SEA 22:58	ATL 06:45	4h 47m	24	83%	0.0%	35 min
AS 464	SEA 23:31	ATL 07:24	4h 53m	178	88%	0.6%	44 min
DL 652	SEA 23:59	ATL 07:46	4h 47m	348	89%	0.6%	58 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	ATL	4h 53m	85%	0.6%	2,380	Flying now
Alaska	SEA	ATL	4h 54m	83%	0.6%	897	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