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2,504 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 7 in 10.

Best time to leave 4–5 pm 83% arrive on time from BOS
Best single flight B6 397 BOS 07:10 → SEA 10:34 · 89% on time Avoid DL 324 BOS 19:25 → SEA 22:49 · 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).

7
8
9
10
11
12
13
14
15
16
17
18
19
BOS
89
86
88
72
78
66
70
63
% 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.
JetBlue 247 79% 1.2% 72 min
Delta 1,035 73% 1.4% 57 min
Alaska 1,222 72% 1.1% 51 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.
B6 397 BOS 07:10 SEA 10:34 89%
AS 537 BOS 09:01 SEA 12:18 84%
DL 332 BOS 11:29 SEA 14:50 78%
DL 384 BOS 07:45 SEA 11:01 77%
AS 459 BOS 07:03 SEA 10:26 75%
· · ·
DL 324 BOS 19:25 SEA 22:49 67%

All 14 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.
AS 459 BOS 07:03 SEA 10:26 6h 23m 364 75% 0.8% 43 min
B6 397 BOS 07:10 SEA 10:34 6h 24m 165 89% 0.0% 60 min
DL 384 BOS 07:45 SEA 11:01 6h 16m 365 77% 1.4% 44 min
AS 338 BOS 09:00 SEA 12:23 6h 23m 52 80% 1.9% 50 min
AS 537 BOS 09:01 SEA 12:18 6h 17m 184 84% 1.1% 43 min
DL 332 BOS 11:29 SEA 14:50 6h 20m 239 78% 0.8% 60 min
AS 1506 BOS 15:26 SEA 18:45 6h 19m 18 83% 0.0% 26 min
DL 2889 BOS 15:40 SEA 19:11 6h 31m 67 71% 0.0% 76 min
AS 260 BOS 16:48 SEA 20:10 6h 22m 28 75% 0.0% 59 min
AS 304 BOS 17:56 SEA 21:26 6h 30m 71 66% 0.0% 53 min
AS 306 BOS 19:11 SEA 22:27 6h 16m 116 60% 1.7% 48 min
B6 197 BOS 19:24 SEA 22:49 6h 25m 82 58% 3.7% 78 min
DL 324 BOS 19:25 SEA 22:49 6h 25m 363 67% 2.2% 62 min
AS 1337 BOS 19:44 SEA 23:07 6h 23m 44 53% 2.3% 60 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.
JetBlue BOS SEA 6h 25m 79% 1.2% 247 Flying now
Delta BOS SEA 6h 25m 73% 1.4% 1,035 Flying now
Alaska BOS SEA 6h 22m 72% 1.1% 1,222 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