BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
MIA→IAD

Miami, FL (MIA) to Washington, DC (IAD) flight delay odds

80.0% of 646 official scheduled MIA-to-IAD flights arrived on time; 12.8% arrived at least 30 minutes late and 0.9% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Reporting window: July 2025–June 2026 · Updated September 16, 2026

HISTORICAL ROUTE SIGNALLower disruption
80.0%arrived on time
12.8%30+ min late
0.9%cancelled
646scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late7.9%all scheduled flights
120+ minutes late3.7%all scheduled flights
Diverted0.2%did not reach as scheduled
Average arrival+4.2 mincompleted flights

Which departure time was most reliable for MIA to IAD?

Among qualifying MIA-to-IAD departure window results, Late morning had the highest on-time rate: 83.3% of 54 flights. Evening was lowest at 76.3% across 156 flights.

Departure windowFlightsOn time30+ minCancelled
Late morning5483.3%3.7%1.9%
Afternoon41080.2%13.9%0.2%
Evening15676.3%15.4%2.6%

Which weekday was most reliable for MIA to IAD?

Among qualifying MIA-to-IAD weekday results, Tuesday had the highest on-time rate: 88.9% of 72 flights. Sunday was lowest at 65.3% across 101 flights.

DayFlightsOn time30+ minCancelled
Monday10582.9%11.4%1.0%
Tuesday7288.9%6.9%0.0%
Wednesday7585.3%14.7%0.0%
Thursday9882.7%11.2%1.0%
Friday10680.2%14.2%0.0%
Saturday8978.7%15.7%0.0%
Sunday10165.3%14.9%4.0%

Which airline was most reliable for MIA to IAD?

Among qualifying MIA-to-IAD airline results, United Airlines had the highest on-time rate: 82.0% of 512 flights. Frontier Airlines was lowest at 72.4% across 134 flights.

AirlineFlightsOn time30+ minCancelled
United Airlines51282.0%12.7%0.4%
Frontier Airlines13472.4%13.4%3.0%

Which month was most reliable for MIA to IAD?

Among qualifying MIA-to-IAD month results, June 2026 had the highest on-time rate: 100.0% of 30 flights. July 2025 was lowest at 61.5% across 52 flights.

MonthFlightsOn time30+ minCancelled
July 20255261.5%28.8%3.8%
August 20255367.9%20.8%0.0%
September 20254793.6%2.1%0.0%
October 20254985.7%6.1%0.0%
November 20254472.7%18.2%0.0%
December 20255887.9%6.9%0.0%
January 20267677.6%7.9%3.9%
February 20266177.0%16.4%0.0%
March 20266369.8%25.4%0.0%
April 20266885.3%8.8%1.5%
May 20264593.3%6.7%0.0%
June 202630100.0%0.0%0.0%

What drove MIA to IAD delay minutes?

Late aircraft was the largest recorded MIA-to-IAD delay category, accounting for 51.6% of 9,352 BTS-attributed delay minutes during July 2025–June 2026.

Airline14.1%
Late aircraft51.6%
National airspace28.6%
Weather5.7%
Security0.0%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.