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Showing Delta only (incl. its regional partners)All airlines ×
1,234 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 86% depart on time. After 4 pm it’s 7 in 10.

Best time to leave 6–7 am 86% arrive on time from BOS
Best single flight DL 479 BOS 06:20 → LAX 09:35 · 81% on time Avoid DL 321 BOS 20:30 → LAX 23:51 · 69% 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).

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BOS
91
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91
84
64
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61
% 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 479 BOS 06:20 LAX 09:35 81%
DL 318 BOS 16:25 LAX 19:47 74%
DL 321 BOS 20:30 LAX 23:51 69%

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 479 BOS 06:20 LAX 09:35 6h 15m 363 81% 1.9% 70 min
DL 2004 BOS 10:55 LAX 14:07 6h 12m 86 89% 1.2% 59 min
DL 318 BOS 16:25 LAX 19:47 6h 22m 345 74% 1.7% 70 min
DL 321 BOS 20:30 LAX 23:51 6h 21m 280 69% 2.9% 97 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 LAX 6h 21m 77% 1.9% 1,234 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