Historical on-time performance
Washington to Columbus
299 miData through Dec 2025Source: US DOT · BTS
Flights on IAD–CMH arrive on time 79% of the time over the last 12 months.
On-time rate79%arrived within 15 min
p90 delay45 min1 in 10 flights is worse (tail risk)
Cancelled1.1%of scheduled flights
based on 1,010 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- United AirlinesbestOn-time90%Medianon timep9010 minCancel0.0%Flights131
- Republic AirwaysOn-time77%Medianon timep9050 minCancel1.3%Flights879
Why flights run late
Delay causes
- Airline29%
- Weather8%
- Air traffic (NAS)17%
- Late aircraft46%
- 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 IAD → CMH
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 — 93% on time.
- Mornings93% on time · p90 10 min · 487 flights
- Middays88% on time · p90 15 min · 499 flights
- Overnights82% on time · p90 35 min · 772 flights
- Evenings78% on time · p90 45 min · 630 flights
- Afternoons68% on time · p90 35 min · 110 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 81% to 86% on time.
- Tuesdays86% on time · p90 15 min · 358 flights
- Wednesdays85% on time · p90 25 min · 375 flights
- Saturdays85% on time · p90 30 min · 289 flights
- Fridays84% on time · p90 30 min · 369 flights
- Thursdays83% on time · p90 30 min · 375 flights
- Mondays83% on time · p90 30 min · 379 flights
- Sundays81% on time · p90 30 min · 353 flights
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