Route Reliability
Washington → Dayton
IAD–DAY · 367 miles · Washington Dulles International Airport to Dayton International Airport
- 82%
- Arrive within 15 minutes
- 7 min
- Average arrival delay
- 1.9%
- Cancelled
- 942
- Flights in the data
Data through May 2026.
United Airlines is the only airline in this data on this route, arriving on time 82% of the time across 942 flights. No comparison to make.
What the data says
Morning-you made the right choice.
IAD–DAY flights departing between 6–9 AM arrived on time 85% of the time, versus 78% between 3–6 PM.
Thursday has been the better bet.
A small edge: 87% on time on Thursdays against 80% on Sundays.
Trending in the right direction.
IAD–DAY flights arrived on time 85% of the time over the last three months in the data, compared with 78% 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
- Mon84%(140 flights)
- Tue80%(131 flights)
- Wed81%(124 flights)
- Thu87%(127 flights)
- Fri81%(140 flights)
- Sat81%(120 flights)
- Sun80%(139 flights)
- 6–9 AM85%(233 flights)
- 12–3 PM84%(359 flights)
- 3–6 PM78%(329 flights)
Jun 76% → May 84% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 76% | 75 |
| July 2025 | 74% | 82 |
| August 2025 | 84% | 89 |
| September 2025 | 91% | 90 |
| October 2025 | 86% | 90 |
| November 2025 | 79% | 75 |
| December 2025 | 70% | 74 |
| January 2026 | 75% | 64 |
| February 2026 | 89% | 55 |
| March 2026 | 83% | 64 |
| April 2026 | 89% | 73 |
| May 2026 | 84% | 90 |
Same trip, other airports
Keep nerding
Based on 942 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.