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Showing Delta only (incl. its regional partners)All airlines ×
1,035 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 72%.

Best time to leave 11 am–12 pm 78% arrive on time from BOS
Best single flight DL 332 BOS 11:29 → SEA 14:50 · 78% 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
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9
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BOS
90
88
67
70
76
% 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.

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 332 BOS 11:29 SEA 14:50 78%
DL 384 BOS 07:45 SEA 11:01 77%
DL 324 BOS 19:25 SEA 22:49 67%

All 4 Delta 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 384 BOS 07:45 SEA 11:01 6h 16m 365 77% 1.4% 44 min
DL 332 BOS 11:29 SEA 14:50 6h 20m 239 78% 0.8% 60 min
DL 2889 BOS 15:40 SEA 19:11 6h 31m 67 71% 0.0% 76 min
DL 324 BOS 19:25 SEA 22:49 6h 25m 363 67% 2.2% 62 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 BOS SEA 6h 25m 73% 1.4% 1,035 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