MIA (Miami) to BOS (Boston) flights arrive on time 71% of the time. The most reliable airline on this route is Frontier Airlines at 92%. The average delay is 77 minutes. Delays on this route are most often caused by the incoming plane arriving late.
Source: Bureau of Transportation Statistics. Updated April 2026.MIA → BOS
MIA (Miami) to BOS (Boston)
MIA → BOS on-time performance by month
24
25
JanFebMarAprMayJunJulAugSepOctNovDec
Worse
Better
This route is delayed fairly often. About 71% of flights arrive on schedule.
Delays on this route are most often caused by the incoming plane arriving late.
Accurate?
Frontier Airlines is significantly more reliable on this route at 92% on time vs JetBlue Airways at 68%.
Airline Comparison
Frontier Airlines leads at 92% on time; JetBlue Airways trails at 68%.
Accurate?
Good to know
Departing from MIA
76% on timeExpect ~19 min sitting on the taxiway after your gate pushes back. MIA has long runway queues.
TSA is currently ~22 min. Best time: 4 AM (about 5 min).
Arriving at BOS
79% on timeWhen flights into BOS are late, the average delay is 74 minutes. Build buffer if you have ground plans.
If connecting at BOS: TSA is ~29 min right now. Allow at least 60 minutes for a domestic connection.
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Data last updated April 2026. Source: Bureau of Transportation Statistics.