MIA (Miami) to IAD (Washington) flights arrive on time 81% of the time. The most reliable airline on this route is United Airlines at 83%. The average delay is 85 minutes. Delays on this route are most often caused by the incoming plane arriving late.
Source: Bureau of Transportation Statistics. Updated March 2026.MIA → IAD
MIA (Miami) to IAD (Washington)
MIA → IAD on-time performance by month
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JanFebMarAprMayJunJulAugSepOctNovDec
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This route is on time most of the time. About 81% of flights arrive on schedule.
Delays on this route are most often caused by the incoming plane arriving late.
Accurate?
United Airlines edges out Frontier Airlines on this route — 83% vs 70% on time.
Airline Comparison
United Airlines leads at 83% on time; Frontier Airlines trails at 70%.
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 ~5 min. Best time: 4 AM (about 5 min).
Arriving at IAD
83% on timeWhen flights into IAD are late, the average delay is 74 minutes. Build buffer if you have ground plans.
If connecting at IAD: TSA is ~5 min right now. Allow at least 60 minutes for a domestic connection.
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Data last updated March 2026. Source: Bureau of Transportation Statistics.