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2,906 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 3 in 4.

Best time to leave 1–2 pm 86% arrive on time from JFK
Best single flight AS 23 JFK 13:00 → SEA 16:19 · 78% on time Avoid AS 17 JFK 20:23 → SEA 23:55 · 51% 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).

7
8
9
10
11
12
13
14
15
16
17
18
19
20
JFK
89
84
84
78
73
73
78
65
% 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
Seattle flights leaving JFK 7–8 pm: 1Close ×
DL 688 JFK 19:30 SEA 23:08 6h 38m 359 68% 3.9% 62 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 1,338 73% 3.1% 59 min
JetBlue 166 71% 4.2% 76 min
Alaska 1,402 69% 3.2% 66 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 23 JFK 13:00 SEA 16:19 78%
AS 31 JFK 16:29 SEA 20:09 74%
DL 699 JFK 07:00 SEA 10:05 74%
B6 263 JFK 17:32 SEA 21:02 71%
DL 740 JFK 16:50 SEA 20:19 71%
· · ·
AS 21 JFK 07:00 SEA 10:16 68%
DL 688 JFK 19:30 SEA 23:08 68%
AS 17 JFK 20:23 SEA 23:55 51%
All 9 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 JFK SEA 6h 20m 73% 3.1% 1,338 Flying now
JetBlue JFK SEA 6h 28m 71% 4.2% 166 Flying now
Alaska JFK SEA 6h 32m 69% 3.2% 1,402 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