Historical on-time performance
Miami to Washington
921 miData through Dec 2025Source: US DOT · BTS
Flights on MIA–IAD arrive on time 82% of the time over the last 12 months.
On-time rate82%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled0.4%of scheduled flights
based on 456 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- United AirlinesOn-time82%Medianon timep9035 minCancel0.4%Flights456
Why flights run late
Delay causes
- Airline20%
- Weather10%
- Air traffic (NAS)28%
- Late aircraft41%
- Security0%
Most delay minutes here are attributed to Late aircraft.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly MIA → IAD
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
Mornings are the most reliable time of day to fly this route — 85% on time.
- Mornings85% on time · p90 20 min · 332 flights
- Middays80% on time · p90 40 min · 1,159 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 74% to 88% on time.
- Wednesdays88% on time · p90 30 min · 200 flights
- Tuesdays87% on time · p90 15 min · 199 flights · limited
- Mondays82% on time · p90 25 min · 236 flights
- Fridays78% on time · p90 50 min · 231 flights
- Thursdays78% on time · p90 45 min · 229 flights
- Saturdays76% on time · p90 50 min · 218 flights
- Sundays74% on time · p90 50 min · 242 flights
Advertisement
Keep exploring