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Showing Delta only (incl. its regional partners)All airlines ×
1,236 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

No clear winner: Delta’s LAX → BOS flights land within a few points of 78% on time whatever the hour.

Best time to leave 6–7 am 90% arrive on time from LAX
Best single flight DL 507 LAX 21:00 → BOS 05:28 · 85% on time Avoid DL 437 LAX 10:45 → BOS 19:25 · 71% 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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LAX
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% 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 507 LAX 21:00 BOS 05:28 85%
DL 639 LAX 06:40 BOS 15:15 83%
DL 437 LAX 10:45 BOS 19:25 71%

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 639 LAX 06:40 BOS 15:15 5h 35m 365 83% 2.7% 76 min
DL 437 LAX 10:45 BOS 19:25 5h 36m 342 71% 1.5% 106 min
DL 2166 LAX 15:20 BOS 23:51 5h 31m 79 78% 1.3% 79 min
DL 507 LAX 21:00 BOS 05:28 5h 28m 287 85% 2.8% 75 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 LAX BOS 5h 34m 78% 1.9% 1,236 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