Showing JetBlue only (incl. its regional partners)All airlines ×

247 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

No clear winner: JetBlue’s SEA → BOS flights land within a few points of barely half on time whatever the hour.

Best time to leave 11 am–12 pm 51% arrive on time from SEA

Best single flight B6 398 SEA 11:45 → BOS 20:13 · 55% 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).

SEA

% 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.


B6 398	SEA 11:45	BOS 20:13	55%

All 2 JetBlue 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.


B6 398	SEA 11:45	BOS 20:13	5h 28m	165	55%	0.6%	69 min
B6 198	SEA 23:44	BOS 08:00	5h 18m	82	53%	3.7%	128 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	SEA	BOS	5h 28m	55%	1.6%	247	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