Historical on-time performance
Washington to Columbus
299 miData through May 2026Source: US DOT · BTS
Flights on IAD–CMH arrive on time 78% of the time over the last 12 months.
On-time rate78%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled1.5%of scheduled flights
based on 1,016 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- United AirlinesbestOn-time84%Medianon timep9025 minCancel0.0%Flights301
- Republic AirwaysOn-time75%Medianon timep9050 minCancel2.1%Flights715
Why flights run late
Delay causes
- Airline32%
- Weather5%
- Air traffic (NAS)16%
- Late aircraft47%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline0%
- Weather47%
- Air traffic (NAS)53%
- Security0%
Most cancellations here are attributed to Air traffic (NAS). Shares are among 15 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 → CMH
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 — 92% on time.
- Mornings92% on time · p90 10 min · 609 flights
- Middays87% on time · p90 20 min · 517 flights
- Overnights81% on time · p90 35 min · 913 flights
- Evenings78% on time · p90 45 min · 764 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 80% to 86% on time.
- Tuesdays86% on time · p90 20 min · 420 flights
- Saturdays85% on time · p90 25 min · 328 flights
- Wednesdays85% on time · p90 25 min · 437 flights
- Thursdays83% on time · p90 25 min · 440 flights
- Fridays82% on time · p90 35 min · 432 flights
- Mondays82% on time · p90 35 min · 440 flights
- Sundays80% on time · p90 30 min · 416 flights
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