DEN (Denver) to BUF (Buffalo) flights arrive on time 61% of the time. The most reliable airline on this route is Frontier Airlines at 72%. The average delay is 61 minutes. Delays on this route are most often caused by the incoming plane arriving late.
Source: Bureau of Transportation Statistics. Updated May 2026.DEN → BUF
DEN (Denver) to BUF (Buffalo)
DEN → BUF on-time performance by month
24
25
JanFebMarAprMayJunJulAugSepOctNovDec
Worse
Better
This route is frequently delayed. About 61% of flights arrive on schedule.
Delays on this route are most often caused by the incoming plane arriving late.
Accurate?
Frontier Airlines edges out Southwest Airlines on this route — 72% vs 58% on time.
Airline Comparison
Frontier Airlines leads at 72% on time; Southwest Airlines trails at 58%.
Accurate?
Good to know
Departing from DEN
78% on timeExpect ~17 min sitting on the taxiway after your gate pushes back. DEN has long runway queues.
TSA is currently ~13 min. Best time: 4 AM (about 5 min).
Arriving at BUF
79% on timeWhen flights into BUF are late, the average delay is 71 minutes. Build buffer if you have ground plans.
If connecting at BUF: TSA is ~12 min right now. Allow at least 60 minutes for a domestic connection.
BUF has a 2.7% cancellation rate — keep the airline app handy for rebooking.
Flight cancelled or delayed?
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Data last updated May 2026. Source: Bureau of Transportation Statistics.