Route Reliability
Columbus → Washington
CMH–IAD · 299 miles · John Glenn Columbus International Airport to Washington Dulles International Airport
- 83%
- Arrive within 15 minutes
- 9 min
- Average arrival delay
- 1.5%
- Cancelled
- 1,501
- Flights in the data
Data through May 2026.
United Airlines is the only airline in this data on this route, arriving on time 83% of the time across 1,501 flights. No comparison to make.
What the data says
Morning-you made the right choice.
CMH–IAD flights departing between 6–9 AM arrived on time 94% of the time, versus 66% between 3–6 PM.
Skip Monday if you can.
CMH–IAD flights arrived on time 87% of the time on Thursdays. On Mondays: 77%.
Trending in the right direction.
CMH–IAD flights arrived on time 87% of the time over the last three months in the data, compared with 79% in the three months before that.
Best historical flights
Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.
Top flights by on-time rate
More flights on this route
The breakdown
- Mon77%(213 flights)
- Tue86%(209 flights)
- Wed86%(213 flights)
- Thu87%(209 flights)
- Fri81%(211 flights)
- Sat85%(212 flights)
- Sun78%(211 flights)
- 6–9 AM94%(359 flights)
- 9 AM–12 PM87%(357 flights)
- 12–3 PM73%(252 flights)
- 3–6 PM66%(157 flights)
- 6–9 PM80%(353 flights)
Jun 72% → May 84% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 72% | 143 |
| July 2025 | 75% | 116 |
| August 2025 | 85% | 122 |
| September 2025 | 92% | 142 |
| October 2025 | 84% | 124 |
| November 2025 | 87% | 117 |
| December 2025 | 70% | 124 |
| January 2026 | 82% | 117 |
| February 2026 | 84% | 109 |
| March 2026 | 84% | 122 |
| April 2026 | 95% | 120 |
| May 2026 | 84% | 122 |
Same trip, other airports
Keep nerding
Based on 1,501 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.