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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

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 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