BUF (Buffalo) to DEN (Denver) flights arrive on time 80% of the time. The most reliable airline on this route is United Airlines at 87%. The average delay is 53 minutes. Delays on this route are most often caused by the incoming plane arriving late.
Source: Bureau of Transportation Statistics. Updated March 2026.BUF → DEN
BUF (Buffalo) to DEN (Denver)
BUF → DEN on-time performance by month
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This route is on time most of the time. About 80% of flights arrive on schedule.
Delays on this route are most often caused by the incoming plane arriving late.
Accurate?
United Airlines is significantly more reliable on this route at 87% on time vs Frontier Airlines at 66%.
Airline Comparison
United Airlines leads at 87% on time; Frontier Airlines trails at 66%.
Accurate?
Good to know
Departing from BUF
79% on timeExpect ~17 min sitting on the taxiway after your gate pushes back. BUF has long runway queues.
TSA is currently ~13 min. Best time: 4 AM (about 5 min).
BUF cancels 2.7% of flights — higher than average. Have a backup plan.
Arriving at DEN
78% on timeWhen flights into DEN are late, the average delay is 67 minutes. Build buffer if you have ground plans.
If connecting at DEN: TSA is ~9 min right now. Allow at least 60 minutes for a domestic connection.
Flight cancelled or delayed?
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Data last updated March 2026. Source: Bureau of Transportation Statistics.