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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).

6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
SEA
93
88
81
77
76
77
85
61
77
81
79
83
82
% 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
Atlanta flights leaving SEA 9–10 am: 1Close ×
AS 334 SEA 09:05 ATL 16:57 4h 52m 346 82% 0.3% 44 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.
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 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 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