MIA (Miami) to BUF (Buffalo) flights arrive on time 74% of the time. The most reliable airline on this route is Republic Airways at 80%. The average delay is 101 minutes. Delays on this route are most often caused by the airline (crew, maintenance, or boarding).
Source: Bureau of Transportation Statistics. Updated October 2026.MIA → BUF
MIA (Miami) to BUF (Buffalo)
MIA → BUF on-time performance by month
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JanFebMarAprMayJunJulAugSepOctNovDec
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This route is delayed fairly often. About 74% of flights arrive on schedule.
Delays on this route are most often caused by the airline (crew, maintenance, or boarding).
Accurate?
Republic Airways is significantly more reliable on this route at 80% on time vs American Airlines at 58%.
Airline Comparison
Republic Airways leads at 80% on time; American Airlines trails at 58%.
Accurate?
Good to know
Departing from MIA
76% on timeExpect ~20 min sitting on the taxiway after your gate pushes back. MIA has long runway queues.
TSA is currently ~25 min. Best time: 4 AM (about 5 min).
Arriving at BUF
78% on timeWhen flights into BUF are late, the average delay is 72 minutes. Build buffer if you have ground plans.
If connecting at BUF: TSA is ~18 min right now. Allow at least 60 minutes for a domestic connection.
BUF has a 2.3% cancellation rate — keep the airline app handy for rebooking.
Flight cancelled or delayed?
Check what Republic Airways owes you — refund rights, action plan, complaint email. Free.
Flying out of MIA? We'll brief you.
Delays, TSA, weather, gates — we'll let you know if something matters.
Know someone flying soon?
Send them the link — delay data, TSA waits, weather, all free.
Data last updated October 2026. Source: Bureau of Transportation Statistics.