Historical on-time performance
Washington to Detroit
Flights on IAD–DTW arrive on time 74% of the time over the last 12 months.
based on 936 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
Not enough comparable data to name a most-on-time carrier — low-data carriers aren't ranked.
- Delta Air LinesOn-time87%Medianon timep9015 minCancel3.3%Flights30
- SkyWest AirlinesOn-time74%Medianon timep9090 minCancel1.2%Flights803
- Republic AirwaysOn-time70%Medianon timep9065 minCancel2.9%Flights103
Why flights run late
Delay causes
- Airline73%
- Weather11%
- Air traffic (NAS)11%
- Late aircraft3%
- Security2%
Most delay minutes here are attributed to Airline.
When flights don't go
Why flights were cancelled
- Airline14%
- Weather79%
- Air traffic (NAS)7%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 14 cancellations with a reported cause (BTS reports causes from June 2003).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly IAD → DTW
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Mornings are the most reliable time of day to fly this route — 87% on time.
- Mornings87% on time · p90 20 min · 1,371 flights
- Middays81% on time · p90 40 min · 994 flights
- Overnights73% on time · p90 40 min · 132 flights · limited
- Evenings72% on time · p90 75 min · 1,158 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 78% to 84% on time.
- Thursdays84% on time · p90 25 min · 542 flights
- Wednesdays82% on time · p90 45 min · 548 flights
- Fridays80% on time · p90 45 min · 554 flights
- Mondays79% on time · p90 70 min · 530 flights
- Tuesdays79% on time · p90 50 min · 531 flights
- Saturdays79% on time · p90 55 min · 497 flights
- Sundays78% on time · p90 65 min · 537 flights
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